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The LSR-XXX load sensors use current levels to determine feed rates, tool wear, loss of prime on pumps, mixer viscosity and all types of overload and underload conditions. They may also be used to stage pump motors, chillers and other machinery. These devices combine a current transformer (CT) with Form C (SPDT) relay contacts to switch alarm circuits, contactors or any resistive or inductive load. One simple screwdriver adjustment will calibrate the sensor for all single-phase or 3-phase applications up to 100hp.

Littelfuse

LSR-115 Symcom Load Sensor/ 115V/ 2-100A/ 20-

MFR: Littelfuse

MFR #: LSR-115

UPC: 079458996661

Item #: 543443

Available to Order

$587.28 each

Availability

Location	Available Qty

For splitter applications. Both terminations must be present.

Littelfuse

SE-TA12B Relay Series Gf/Gc Term Assy

MFR: Littelfuse

MFR #: SE-TA12B

UPC: 079458989519

Item #: 1526753

Available to Order

$3783.50 each

Availability

Location	Available Qty

The ECS Series of single-phase AC current sensors is a universal, overcurrent or undercurrent sensing control. Its built-in toroidal sensor eliminates the inconvenience of installing a stand-alone current transformer. Includes onboard adjustments for current sensing mode, trip point, and trip delay. Detects over or undercurrent events like locked rotor, loss of load, an open heater or lamp load, or proves an operation is taking place or has ended. Operation: Input voltage must be supplied at all times for proper operation. When a fault is sensed throughout the trip delay, the output relay is energized. When the current returns to the normal run condition or zero, the output and the delay are reset. If a fault is sensed and then corrected before the trip delay is completed, the relay will not energize and the trip delay is reset to zero.

Littelfuse

ECS41BC SSAC Current Sensor

MFR: Littelfuse

MFR #: ECS41BC

UPC: 079458992441

Item #: 1503591

Available to Order

$610.63 each

Availability

Location	Available Qty

The KRDB Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its microcontroller timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and humidity. The KRDB Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. Operation (Delay-on-Break): Input voltage must be applied before and during timing. Upon closure of the initiate switch, the output relay energizes. The time delay begins when the initiate switch is opened. The output remains energized during timing. At the end of the time delay, the output de-energizes. The output will energize if the initiate switch is closed when input voltage is applied. Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the time delay and output.

Littelfuse

KRDB424 SSAC 2X2 D.O.B. W/Relay

MFR: Littelfuse

MFR #: KRDB424

UPC: 079458994629

Item #: 1202509

Available to Order

$318.38 each

Availability

Location	Available Qty

The KRDB Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its microcontroller timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and humidity. The KRDB Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life. Operation (Delay-on-Break): Input voltage must be applied before and during timing. Upon closure of the initiate switch, the output relay energizes. The time delay begins when the initiate switch is opened. The output remains energized during timing. At the end of the time delay, the output de-energizes. The output will energize if the initiate switch is closed when input voltage is applied. Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the time delay and output.

Littelfuse

KRDB115M SSAC 2X2 D.O.B. W/Relay

MFR: Littelfuse

MFR #: KRDB115M

UPC: 079458994513

Item #: 1305639

Available to Order

$318.38 each

Availability

Location	Available Qty

The 233P is a single-phase pump monitor designed to protect single-phase pumps from dry-well, dead-head, jammed impeller, rapid cycle, overvoltage and undervoltage conditions. The 233P protects 230 volt, 2 or 3 wire, 1/3 to 3hp pumps. A calibration adjustment allows the 233P to be calibrated to your specific pumping applications, thereby reducing the possibility of false or nuisance tripping. A proprietary microcontroller based voltage, power factor and current-sensing circuit constantly monitors for power fluctuations, overcurrent and underload conditions. When an abnormality, such as loss of suction, is detected, the 233P deactivates its output relay and directly disconnects the pump motor. The relay then begins its user-selectable Restart Delay (dry-well recovery) timer. When the timer expires or power is removed and reapplied, the relay reactivates its output relay and allows the pump to turn back on. An infrared LED communicates directly with a hand-held diagnostic tool called the Informer (sold separately).

Littelfuse

233P-1.5-ENCL Symcom 1-Phase Pumpsaverplus / 230V

MFR: Littelfuse

MFR #: 233P-1.5-ENCL

UPC: 079458990348

Item #: 1029249

Available to Order

$1108.50 each

Availability

Location	Available Qty

The TSD2 Series is designed for more demanding commercial and industrial applications where small size and accurate performance are required. The factory calibration for fixed time delays is within 1% of the target time delay. The repeat accuracy, under stable conditions, is 0.1% of the time delay. The TSD Series is rated to operate over an extended temperature range. Time delays of 0.1 seconds to 100 hours are available. The output is rated 1A steady and 10A inrush. The modules are totally solid state and encapsulated to protect the electronic circuitry. Operation (Interval): Upon application of input voltage, the time delay begins. The output is energized during the time delay. At the end of the time delay, the output de-energizes and remains de-energized until input voltage is removed. Reset: Removing input voltage resets the time delay and output.

Littelfuse

TDS120AL SSAC Digi-Set (Single Shot)

MFR: Littelfuse

MFR #: TDS120AL

UPC: 079458999891

Item #: 1340233

Available to Order

$425.68 each

Availability

Location	Available Qty

The 460 is a 3-phase voltage monitor that protects 190-480VAC or 475-600V, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor automatically senses line voltage. This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase voltages to detect harmful power line conditions such as low, high, and unbalanced voltage, loss of any phase, and phase reversal. When a harmful condition is detected, the 460 output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level for a specified amount of time (restart delay). The trip and restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions. All 460 models feature adjustable 1-30 second trip delay, 1-500 second restart delay, 2-8% voltage unbalance trip point, and one form C contact except where noted.

Littelfuse

460-VBM Symcom 3-Phase Volt Mon/ 190-480V/ Ad

MFR: Littelfuse

MFR #: 460-VBM

UPC: 079458990645

Item #: 1012979

Available to Order

$503.23 each

Availability

Location	Available Qty

The TDB Series combines accurate digital circuitry with isolated, 10A, DPDT or SPDT contacts in an 8 or 11-pin plug-in package. The TDB Series features DIP switch selectable time delays ranging from 0.1-10,230 seconds in three ranges. The TDB Series is the product of choice for custom control panel and OEM designers. Operation (Delay-on-Break): Input voltage must be applied to the input before and during timing. Upon closure of the initiate switch, the output relay is energized. The time delay begins when the initiate switch is opened (trailing edge triggered). The output remains energized during timing. At the end of the time delay, the output de-energizes. The output will energize if the initiate switch is closed when input voltage is applied. Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the time delay and output.

Littelfuse

TDB120ALD SSAC Digi-Set (D.O.B.)

MFR: Littelfuse

MFR #: TDB120ALD

UPC: 079458999471

Item #: 858653

Available to Order

$598.68 each

Availability

Location	Available Qty

The SE-CS30 series is a sensitive nickel-core current transformer used with Littelfuse relays to detect low levels of earth-leakage current.

Littelfuse

SE-CS30-26 SE CS30 Series Xfmr Current 600:1 26Mm Id

MFR: Littelfuse

MFR #: SE-CS30-26

UPC: 079458989205

Item #: 1390088

Available to Order

$2101.03 each

Availability

Location	Available Qty

The LSR-0 is a self-powered load sensor intended for use as a proof relay. It is used to verify that current is flowing as intended. It has a guaranteed 15A pull-in current and 2.5A drop-out current. Proof relays are typically used to interlock fans, compressors, motors, heating elements and other devices. The LSR-0 is self-powered, that is, it draws its power from the wire being monitored so it does not require separate control power wiring.

Littelfuse

LSR-0 Symcom Load Sensor/ Self-Powered/ 15-

MFR: Littelfuse

MFR #: LSR-0

UPC: 079458996654

Item #: 891266

Available to Order

$381.98 each

Availability

Location	Available Qty

The 777/ 77C is a fully programmable electronic overload relay designed to protect any motor drawing 2-800 full load amps (external CTs are required above 90 amps). The 777-HVR-SP and 77C (family of products) are for single-phase 100-240VAC applications. Common applications include conveyor systems, HVAC equipment, saws and grinders, fan motors, and almost any pumping application. All of the overload relays provide unsurpassed protection by combining overload, underload, and voltage in one package. For standalone applications, the units incorporate a 3-digit LED display that is used for programming, providing real-time operational information and displaying diagnostic codes to aid in troubleshooting a fault condition. The units also feature a communications port that can be used with communication modules listed in the 777 accessories section to form a Modbus, DeviceNet, Profibus, or Ethernet network. Up to 99 units can be remotely monitored and controlled from a PC, PLC, or SCADA system, and data logging through a PC with the optional Solutions software. This capability allows for a simple, cost-effective way to meet new requirements for arc-flash safety.

Littelfuse

77C Symcom 1-Phase Overload Relay/ 100-24

MFR: Littelfuse

MFR #: 77C

UPC: 079458991192

Item #: 1261620

Available to Order

$1717.18 each

Availability

Location	Available Qty

Used On Systems Up To 1 kV.

Littelfuse

INFORMER Relay Series Remote Diagnostic Tool For Sin

MFR: Littelfuse

MFR #: INFORMER

UPC: 079458994216

Item #: 1029250

Available to Order

$928.63 each

Availability

Location	Available Qty

The ARP Series is used in systems where equal run time for two motors is desirable. The selector switch allows selection of alternation of either load for continuous operation. LEDs indicate the status of the output relay. This versatile series may be front panel mounted (BZ1 accessory required) or 35 mm DIN rail mounted with an accessory socket. Operation: Alternating: When the rotary switch is in the alternate position, alternating operation of Load A and Load B occurs upon the opening of the control switch S1. To terminate alternating operation and cause only the selected load to operate, rotate the switch to position A to lock Load A or position B to lock Load B. The LEDs indicate the status of the internal relay and which load is selected to operate. Note: Input voltage must be applied at all times for proper alternation. The use of a solid-state control switch for S1 may not initiate alternation correctly. S1 voltage must be from the same supply as the units input voltage (see connection diagrams on datasheet). Loss of input voltage resets the unit; Load A becomes the lead load for the next operation. Duplexing (Cross Wired): Duplexing models operate the same as alternating relays and when both the Control (S1) and Lag Load (S2) Switches are closed, Load A and Load B energize simultaneously. The DPDT 8-pin, cross-wired option, allows extra system load capacity through simultaneous operation of both motors when needed. Relay contacts are not isolated.

Littelfuse

ARP43S SSAC Alternating Relay

MFR: Littelfuse

MFR #: ARP43S

UPC: 079458991475

Item #: 729753

Available to Order

$475.63 each

Availability

Location	Available Qty

The ISS-102 is a two-channel, intrinsically-safe switch designed for multiple uses including a pump-up/pump-down (latching) controller or two-channel switch. Two LEDs indicate the state of the intrinsically-safe inputs and output relays and user-selectable options are available including a variable resistance threshold for float inputs. The ISS-102 enclosure is surface or DIN rail mountable. -LC Each input channel is active when the corresponding switch is closed. When the lag input (CH2) is activated, the output closes. Applying latching logic, the output contact remains closed until the lead (CH1) and the lag (CH2) inputs are deactivated. Sensitivity is fixed at 100kOhms with a debounce time delay of 2 seconds. -DCS This dual-channel switch has a debounce delay feature of 0.5 seconds. Resistance probes or switches can be used on its inputs. Two LEDs illuminate the output state of either form A relay. Sensitivity is fixed at 100kOhms with a debounce time delay of 0.5 seconds. -MC By selecting the proper functionality through the dip switches, you can define a pump-up or pump-down, single or dual channel non-latching switch. The sensitivity adjustment (4.7k-100kOhms) allows you to define the input impedance at which the output relays (one form A & one form C) will change state, with a debounce time delay of 0.5 or 2 seconds.

Littelfuse

ISS-102ACI-MC Symcom 2-Ch Intrin-Safe Sw/120V/Dual-

MFR: Littelfuse

MFR #: ISS-102ACI-MC

UPC: 079458994278

Item #: 1371367

Available to Order

$1220.93 each

Availability

Location	Available Qty

Used On Systems Up To 5 kV.

Littelfuse

ER-5KV ER-5KV Series Res Sensing 20K 5000V L-L

MFR: Littelfuse

MFR #: ER-5KV

UPC: 079458977936

Item #: 1311635

Available to Order

$8232.28 each

Availability

Location	Available Qty

The FS300 Series of solid-state flashers were specifically designed to operate lamp loads. Their two-terminal series connection feature makes installation easy. The high immunity to line noise and transients makes the FS300 Series ideal for moving vehicle applications. All solid-state construction means reliability and long life. The FS300 Series offers a factory fixed flash rate of 75 FPM or may be ordered with a fixed, custom flash rate ranging from 60 to 150 FPM. Operation: Upon application of input voltage, the T2 OFF time begins. At the end of the OFF time, the T1 ON time begins and the load energizes. At the end of T1, T2 begins and the load de-energizes. This cycle repeats until input voltage is removed. Reset: Removing input voltage resets the output and the sequence to T2.

Littelfuse

FS312 SSAC Dc Flasher

MFR: Littelfuse

MFR #: FS312

UPC: 079458993547

Item #: 789423

Available to Order

$300.40 each

Availability

Location	Available Qty

The ECS Series of single-phase AC current sensors is a universal, overcurrent or undercurrent sensing control. Its built-in toroidal sensor eliminates the inconvenience of installing a stand-alone current transformer. Includes onboard adjustments for current sensing mode, trip point, and trip delay. Detects over or undercurrent events like locked rotor, loss of load, an open heater or lamp load, or proves an operation is taking place or has ended. Operation: Input voltage must be supplied at all times for proper operation. When a fault is sensed throughout the trip delay, the output relay is energized. When the current returns to the normal run condition or zero, the output and the delay are reset. If a fault is sensed and then corrected before the trip delay is completed, the relay will not energize and the trip delay is reset to zero.

Littelfuse

ECSL61AH SSAC Current Sensor

MFR: Littelfuse

MFR #: ECSL61AH

UPC: 079458992762

Item #: 1090804

Available to Order

$627.83 each

Availability

Location	Available Qty

The PCR Series of photo control is a combination of precision electronic circuitry, electromechanical output, and unique molded plastic housing. Designed and built to meet the demands of the most rigorous requirement of tower and obstruction lighting control, each unit is factory calibrated to meet FAA and FCC specifications. Electronic circuit, output contactor, and terminal block are all contained within front plastic housing. Edge support molded into the bottom edge of housing allows easy wiring of new and existing installations. Available with or without cast aluminum junction box. Operation: When the amount of light sensed falls below the actuation level for energization, the output relay energizes. Conversely, when the amount rises above the actuation level for de-energization, the output relay de-energizes.

Littelfuse

PCR11 SSAC Photo Electric Control

MFR: Littelfuse

MFR #: PCR11

UPC: 079458997750

Item #: 1366356

Available to Order

$1886.38 each

Availability

Location	Available Qty

The 460-100-SP is used on 95-120VAC, 50*/60Hz single-phase motors and the 190-240VAC, 50*/60Hz single-phase motors to protect them from damaging high and low voltage conditions. An adjustment knob allows the user to set a 1-500 second restart delay. The variable restart delay is also a power-up delay and can be utilized to stagger-start motors on the same system. A unique microcontroller-based, voltage-sensing circuit constantly monitors the voltage to detect harmful power line conditions. When a harmful condition is detected, the relays output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level and a specified amount of time has elapsed (restart delay). The trip delay prevents nuisance tripping due to rapidly fluctuating power line conditions.

Littelfuse

460-200-SP Symcom 1-Phase Voltage Monitor/ 190-2

MFR: Littelfuse

MFR #: 460-200-SP

UPC: 079458990553

Item #: 878263

Available to Order

$503.23 each

Availability

Location	Available Qty

The TSD2 Series is designed for more demanding commercial and industrial applications where small size and accurate performance are required. The factory calibration for fixed time delays is within 1% of the target time delay. The repeat accuracy, under stable conditions, is 0.1% of the time delay. The TSD Series is rated to operate over an extended temperature range. Time delays of 0.1 seconds to 100 hours are available. The output is rated 1A steady and 10A inrush. The modules are totally solid state and encapsulated to protect the electronic circuitry. Operation (Interval): Upon application of input voltage, the time delay begins. The output is energized during the time delay. At the end of the time delay, the output de-energizes and remains de-energized until input voltage is removed. Reset: Removing input voltage resets the time delay and output.

Littelfuse

TSD24145S SSAC Digi-Timer (Interval)

MFR: Littelfuse

MFR #: TSD24145S

UPC: 079458020526

Item #: 866239

Available to Order

$305.43 each

Availability

Location	Available Qty

The 460 is a 3-phase voltage monitor that protects 190-480VAC or 475-600V, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor automatically senses line voltage. This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase voltages to detect harmful power line conditions such as low, high, and unbalanced voltage, loss of any phase, and phase reversal. When a harmful condition is detected, the 460 output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to an acceptable level for a specified amount of time (restart delay). The trip and restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions. All 460 models feature adjustable 1-30 second trip delay, 1-500 second restart delay, 2-8% voltage unbalance trip point, and one form C contact except where noted.

Littelfuse

460-L Symcom 3-Phase Volt Mon/ 190-480V/ Ad

MFR: Littelfuse

MFR #: 460-L

UPC: 079458990607

Item #: 1148856

Available to Order

$454.05 each

Availability

Location	Available Qty

3Ph Vm/380-480V/Adj.Vub,Td,Rd/2X480V Rly

Littelfuse

3Ph Vm/380-480V/Adj.Vub,Td,Rd/2X480V Rly

MFR: Littelfuse

MFR #: 355-400-5

UPC: 079458989915

Item #: 876387

Available to Order

$1291.80 each

Availability

Location	Available Qty

No Image Available

Littelfuse

3-Phase Plug-In Voltage Monitor 190-480Vac, 50/60Hz

MFR: Littelfuse

MFR #: 201A-AU

UPC: 079458990232

Item #: 1268612

Available to Order

$534.83 each

Availability

Location	Available Qty

2X2 D.O.B. With Elay

Littelfuse

2X2 D.O.B. With Elay

MFR: Littelfuse

MFR #: KRDB422

UPC: 079458994605

Item #: 1174104

Available to Order

$318.38 each

Availability

Location	Available Qty

Ac Low Cost Flasher

Littelfuse

Ac Low Cost Flasher

MFR: Littelfuse

MFR #: FS126

UPC: 079458993349

Item #: 1133963

Available to Order

$135.20 each

Availability

Location	Available Qty

No Image Available

Littelfuse

1-Phase Pumpsaverplus / 230V

MFR: Littelfuse

MFR #: 233P-ENCL

UPC: 079458990355

Item #: 770036

Available to Order

$1440.88 each

Availability

Location	Available Qty

1-Ch Intrinsically-Safe Switch

Littelfuse

1-Ch Intrinsically-Safe Switch

MFR: Littelfuse

MFR #: ISS-100

UPC: 079458994247

Item #: 943567

Available to Order

$668.10 each

Availability

Location	Available Qty

No Image Available

Littelfuse

Cross-Wired Alternating Relay 95-125V

MFR: Littelfuse

MFR #: ALT-115-X-SW

UPC: 079458991338

Item #: 1172127

Available to Order

$381.35 each

Availability

Location	Available Qty

No Image Available

Littelfuse

Term Assy Small Format Wl

MFR: Littelfuse

MFR #: SE-TA6ASF-WL

UPC: 079458989564

Item #: 665877

Available to Order

$2242.40 each

Availability

Location	Available Qty

No Image Available

Littelfuse

Remote Indication-And-Reset

MFR: Littelfuse

MFR #: RK-105

UPC: 079458987768

Item #: 454504

Available to Order

$804.33 each

Availability

Location	Available Qty

No Image Available

Littelfuse

5.6V, 5W Termination Device, Axial Lead

MFR: Littelfuse

MFR #: 1N5339B

UPC: 079458859478

Item #: 1219827

Available to Order

$22.80 each

Availability

Location	Available Qty

No Image Available

Littelfuse

Neutral-Grounding-Resistor Monitor

MFR: Littelfuse

MFR #: SE-330-00-00

UPC: 079458988321

Item #: 765562

Available to Order

$16875.88 each

Availability

Location	Available Qty

No Image Available

Littelfuse

Current Transformer

MFR: Littelfuse

MFR #: CT200

UPC: 079458977660

Item #: 444012

Available to Order

$595.05 each

Availability

Location	Available Qty

No Image Available

Littelfuse

Stud-Mount Termination

MFR: Littelfuse

MFR #: SE-TA6-SM

UPC: 079458989533

Item #: 625879

Available to Order

$695.28 each

Availability

Location	Available Qty

Gf/Gc Term Assy 5.6V 50W

Littelfuse

Gf/Gc Term Assy 5.6V 50W

MFR: Littelfuse

MFR #: SE-TA6

UPC: 079458989526

Item #: 1163979

Available to Order

$1794.50 each

Availability

Location	Available Qty