Littelfuse, Inc. Datasheets for Time Delay Relays

Time delay relays and solid state timers use solid state electronic devices to provide a time delay.
Time Delay Relays: Learn more

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Product Name Notes
Delay on Make Timer -- ERDM123
Delay on Make Timer -- ERDM126
Delay on Make Timer -- ERDM128
Delay on Make Timer -- ERDM222
Delay on Make Timer -- ERDM4130S
Delay on Make Timer -- ERDM4210
Delay on Make Timer -- ERDM422
Delay on Make Timer -- ERDM423
Delay on Make Timer -- ERDM425
Delay on Make Timer -- ERDM427
Delay on Make Timer -- ERDM429
The ERDM Series are a combination of digital electronics and a reliable electromechanical relay. These devices offer a DPDT relay output for relay logic circuits, and isolation of input to...
Delay on Make Interval Timer -- ESD52233 The ESD5 Series is an accurate, solid-state, delayed interval timer. It offers a 1A steady, 10A inrush output and is available with adjustable or fixed time delays of 0.1 seconds...
Flashers Timer -- FS143
Flashers Timer -- FS152
Flashers Timer -- FS152-30
Flashers Timer -- FS152-60
Flashers Timer -- FS162
Flashers Timer -- FS162-30
The FS100 Series (medium amp) may be used to control inductive, incandescent, or resistive loads. Input voltages of 24, 120, or 230VAC are available. Factory fixed flash rate of 90...
Flashers Timer -- FS219-45
Flashers Timer -- FS224
The FS200 Series may be used to control inductive, incandescent, or resistive loads. Input voltages of 12, 24, 36, 48, or 110VDC are available. Factory fixed flash rate of 90...
Flashers Timer -- FS312
Flashers Timer -- FS324
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...
Delay on Break Timer -- HRDB1110M
Delay on Break Timer -- HRDB117S
Delay on Break Timer -- HRDB120
Delay on Break Timer -- HRDB121
Delay on Break Timer -- HRDB124
Delay on Break Timer -- HRDB21A65M
Delay on Break Timer -- HRDB223
Delay on Break Timer -- HRDB321
Delay on Break Timer -- HRDB324
Delay on Break Timer -- HRDB423
Delay on Break Timer -- HRDB623
The HRDB Series combines an electromechanical, relay output with microcontroller timing circuitry. The HRDB offers 12 to 230V operation in five options and factory fixed, external, or onboard adjustable time...
Delay on Make Timer -- HRDM120
Delay on Make Timer -- HRDM3112S
Delay on Make Timer -- HRDM413M
Delay on Make Timer -- HRDM415M
The HRDM Series combines an electromechanical relay output with microcontroller timing circuitry. It offers 12 to 230V operation in five ranges and factory fixed, onboard, or external adjustable time delays...
Alternating Timer -- HRISW21FT
Delay on Break Timer -- HRISW25B
The HRPS and HRIS Series combine an electromechanical relay output with microcontroller timing circuitry. It is a factory programmed module available in any 1 of 13 standard functions. It offers...
Counters Timer -- HRV11SC
Counters Timer -- HRV24AC
Counters Timer -- HRV41AE
Counters Timer -- HRV41SE
Counters Timer -- HRV42SE
Counters Timer -- HRV43AE
Counters Timer -- HRV43AN
Counters Timer -- HRV43SE
The HRV combines the accuracy of microcontroller based circuitry with an electromechanical relay output. The HRV’s switching capacity allows direct control of loads like compressors, pumps, motors, heaters, and lighting.
Delay on Break Timer -- KRDB110.1S
Delay on Break Timer -- KRDB112.5S
Delay on Break Timer -- KRDB1120M
Delay on Break Timer -- KRDB115M
Delay on Break Timer -- KRDB120
Delay on Break Timer -- KRDB124
Delay on Break Timer -- KRDB217S
Delay on Break Timer -- KRDB31120S
Delay on Break Timer -- KRDB415S
Delay on Break Timer -- KRDB420
Delay on Break Timer -- KRDB421
Delay on Break Timer -- KRDB422
Delay on Break Timer -- KRDB423
Delay on Break Timer -- KRDB424
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,...
Delay on Make Timer -- KRDM1110S
Delay on Make Timer -- KRDM1130S
Delay on Make Timer -- KRDM120
Delay on Make Timer -- KRDM121
Delay on Make Timer -- KRDM2110M
Delay on Make Timer -- KRDM215M
Delay on Make Timer -- KRDM220
Delay on Make Timer -- KRDM221
Delay on Make Timer -- KRDM223
Delay on Make Timer -- KRDM310.2S
Delay on Make Timer -- KRDM4110M
Delay on Make Timer -- KRDM4110S
Delay on Make Timer -- KRDM4145S
Delay on Make Timer -- KRDM420
Delay on Make Timer -- KRDM421
Delay on Make Timer -- KRDM424
Delay on Make Timer -- KRDM430
Delay on Make Timer -- KRDM433
Delay on Make Timer -- KRDM6115M
The KRDM Series is a compact time delay relay measuring only 2 in. (50.8 mm) square. Its solid-state timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock,...
Delay on Make Delay on Break Timer -- KRPD215S190SMB
Delay on Make Delay on Break Timer -- KRPDD2121MB
Delay on Make Interval Timer -- KRPDA175S130SMI
The KRPD Series is a factory programmed time delay relay available with 1 of 12 standard dual functions. The time delays can be factory fixed, onboard or externally adjustable or...
Alternating Timer -- KRPSA10.1SFT
Alternating Timer -- KRPSD10.1SF
Delay on Break Timer -- KRPS913MB
Delay on Break Timer -- KRPSA22B
Delay on Break Timer -- KRPSD21B
Delay on Make Timer -- KRPS4160MM
Delay on Make Timer -- KRPSA24M
Delay on Make Timer -- KRPSD21M
Delay on Make Timer -- KRPSD22M
The KRPS Series is a factory programmed time delay relay available with 1 of 15 functions and measures only 2 inches square. The KRPS offers a wide range of fixed,...
Delay on Make Timer -- KSD11120S
Delay on Make Timer -- KSD1123
Delay on Make Timer -- KSD1230
Delay on Make Timer -- KSD1320
Delay on Make Timer -- KSD1412S
Delay on Make Timer -- KSD14130S
Delay on Make Timer -- KSD1420
Delay on Make Timer -- KSD16130S
The KSD1 Series features two-terminal, series-connection with the load. The KSD1 Series is an ideal choice for delay-on make timing applications. This series is designed for general purpose commercial and...
Delay on Break Timer -- KSDB1110MP
Delay on Break Timer -- KSDB1115SP
Delay on Break Timer -- KSDB1120SP
Delay on Break Timer -- KSDB113MP
Delay on Break Timer -- KSDB113SP
Delay on Break Timer -- KSDB120P
Delay on Break Timer -- KSDB134P
Delay on Break Timer -- KSDB2115S
Delay on Break Timer -- KSDB220
Delay on Break Timer -- KSDB231
Delay on Break Timer -- KSDB314SP
Delay on Break Timer -- KSDB315SP
Delay on Break Timer -- KSDB324N
Delay on Break Timer -- KSDB330N
Delay on Break Timer -- KSDB4120M
Delay on Break Timer -- KSDB4160S
Delay on Break Timer -- KSDB4190M
Delay on Break Timer -- KSDB431
Delay on Break Timer -- KSDB61150S
Delay on Break Timer -- KSDB631
The KSDB is designed for general purpose commercial and industrial applications where a small, cost effective, reliable solid-state timer is required. The factory calibration for fixed time delays is within...
Delay on Make Timer -- KSDU811200
Delay on Make Timer -- KSDU8120
The KSDU Series are encapsulated solid-state, delay-on-make timers that combine digital timing circuitry with universal voltage operation. The KSDU is factory fixed from 0.1s to 10,230s and does not include...
Alternating Timer -- KSPS2180SB
Delay on Make Timer -- KSPSP145SM
The KSPS Series is a factory programmed module available in any 1 of 14 standard functions. The KSPS offers a single, fixed, externally or onboard adjustable time delay. The 1A...
Counters Timer -- KSPUA8C The KSPU Series is a factory programmed module available in any 1 of 14 standard functions. The KSPU offers a single adjustable counter function. Switch adjustment allows accurate selection of...
Delay on Make Timer -- MSM10.5W6
Delay on Make Timer -- MSM10.7W6
Delay on Make Timer -- MSM110W6
Delay on Make Timer -- MSM11W6
Delay on Make Timer -- MSM130W9
Delay on Make Timer -- MSM190W6
Delay on Make Timer -- MSM20.15W9
Delay on Make Timer -- MSM210P3
Delay on Make Timer -- MSM25W9
Delay on Make Timer -- MSM30.7W6
Delay on Make Timer -- MSM420W6
Delay on Make Timer -- MSM42W6
Delay on Make Timer -- MSM43W6
Delay on Make Timer -- MSM450W6
The MSM replaces bi-metal type timing with reliable solid-state circuitry. There are no moving parts to arc or wear. It is a cost effective solution for OEM designers. It is...
Delay on Break Timer -- ORB120A160
Delay on Break Timer -- ORB120A25
Delay on Break Timer -- ORB24A11D
Delay on Break Timer -- ORB24A21D
Delay on Break Timer -- ORB24A25
The ORB Series open PCB construction offers the user good economy without sacrificing performance and reliability. The output relay is available in isolated, 10A, DPDT or SPDT forms. The time...
Delay on Make Timer -- ORM120A17
Delay on Make Timer -- ORM120A25
Delay on Make Timer -- ORM230A17
Delay on Make Timer -- ORM24D13.5
Delay on Make Timer -- ORM24D22
The ORM Series features open PC board construction for reduced cost. It has isolated, 10A, DPDT relay contacts and all connections are 0.25 in (6.35 mm) male quick connect terminals.
Delay on Make Timer -- PRLM41180
Delay on Make Timer -- PRLM423
The PRLM Series is designed for use in non-critical timing applications. It offers low cost, knob adjustable timing control, full 10A relay output, and onboard LED indication. The knob adjustment...
Delay on Make Timer -- T10120
Delay on Make Timer -- T10200
Delay on Make Timer -- T10400
Delay on Make Timer -- T10S400
The T-10-(xxx) on-delay timer is a solid-state electronic device that provides accurate and reliable timing for control circuits up to 460VAC. The T-10 features a user-selectable time delay from 6...
Delay on Break Timer -- TDB120AL
Delay on Break Timer -- TDB120ALD
Delay on Break Timer -- TDB12D
Delay on Break Timer -- TDB230AL
Delay on Break Timer -- TDB24AL
Delay on Break Timer -- TDB24DL
Delay on Break Timer -- TDBH120AL
Delay on Break Timer -- TDBH120ALD
Delay on Break Timer -- TDBL120AL
Delay on Break Timer -- TDBL120ALD
Delay on Break Timer -- TDBL24DL
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...
Delay on Make Timer -- TDM120AL
Delay on Make Timer -- TDM12DL
Delay on Make Timer -- TDM230AL
Delay on Make Timer -- TDM24AL
Delay on Make Timer -- TDM24DL
Delay on Make Timer -- TDMH120AL
Delay on Make Timer -- TDMH24AL
Delay on Make Timer -- TDML110DL
Delay on Make Timer -- TDML120AL
Delay on Make Timer -- TDML12DL
Delay on Make Timer -- TDML24DL
The TDM Series is a delay-on-make timer that combines accurate digital circuitry with isolated, DPDT relay contacts in an industry standard 8-pin plug-in package. DIP switch adjustment allows precise selection...
Delay on Make Delay on Break Timer -- TDMB411
Delay on Make Delay on Break Timer -- TDMB413D
Delay on Make Delay on Break Timer -- TDMB422
Delay on Make Delay on Break Timer -- TDMB422D
Delay on Make Delay on Break Timer -- TDMB622
The TDMB combines both delay-on-make and delay-on-break functions into one plug-in package. Selection of the time period is accomplished with dual switches, one for the on delay and the other...
Delay on Make Timer -- TDU3000A
Delay on Make Timer -- TDU3001A
Delay on Make Timer -- TDU3003A
Delay on Make Timer -- TDUH3000A
Delay on Make Timer -- TDUH3001A
Delay on Make Timer -- TDUL3000A
The TDU Series are encapsulated solid-state, delay-on-make timers that combine digital timing circuitry with universal voltage operation. The TDU offers DIP switch adjustment allowing accurate selection of the time delay...
Delay on Break Timer -- TDUB3000A
Delay on Break Timer -- TDUB3002A
Delay on Break Timer -- TDUBH3001A
Delay on Break Timer -- TDUBH3002A
Delay on Break Timer -- TDUBL3002A
The TDUB Series combines digital timing circuitry with universal voltage operation. Voltages of 24 to 240VAC and 12 to 24VDC are available in three ranges. The TDUB Series offers DIP...
Delay on Make Timer -- TH1B633
Delay on Make Timer -- TH1C415
Delay on Make Timer -- TH1C621
The TH1 Series is a solid-state relay and timer combined into one compact, easy-to-use control. This highly reliable device eliminates the need for a separate solid-state relay. When mounted to...
Delay on Make Timer -- THD1B410.5S The THD1 Series combines accurate timing circuitry with high power solid-state switching. It can switch motors, lamps, and heaters directly without a contactor. You can reduce labor, component cost, and...
Delay on Break Timer -- THDB421A
Delay on Break Timer -- THDB434C
The THDB Series combines accurate timing circuitry with high power, solid-state switching. It can switch motors, lamps, and heaters directly without a contactor. You can reduce labor, component cost, and...
Delay on Make Timer -- TMV8000
Delay on Make Timer -- TSU2000
The TMV and TSU Series are universal voltage delay-on-make timers. Two models cover all the popular voltages and time delays. Available with knob or external adjust time delay. Its simple...
Delay on Break Timer -- TRB120A2Y30
Delay on Break Timer -- TRB120A3X600
Delay on Break Timer -- TRB120A4Y120
Delay on Break Timer -- TRB24D10Y10
The TRB Series combines an isolated, 10A electromechanical relay output with analog timing circuitry. False trigger of the TRB by a transient is unlikely because of the complete isolation of...
Delay on Make Timer -- TRM120A2X30
Delay on Make Timer -- TRM120A2Y120
Delay on Make Timer -- TRM120A2Y180
Delay on Make Timer -- TRM24A8Y5
Delay on Make Timer -- TRM24D1X10
Delay on Make Timer -- TRM24D1X2
The TRM Series is a combination of analog electronic circuitry and electromechanical relay output. It provides input to output isolation with a wide variety of input voltages and time ranges.
Delay on Make Timer -- TS121150
Delay on Make Timer -- TS12130
Delay on Make Timer -- TS1214
Delay on Make Timer -- TS12190
Delay on Make Timer -- TS1221
Delay on Make Timer -- TS1222
Delay on Make Timer -- TS1224
Delay on Make Timer -- TS13115
Delay on Make Timer -- TS1321
Delay on Make Timer -- TS1410.25
Delay on Make Timer -- TS14110
Delay on Make Timer -- TS141180
Delay on Make Timer -- TS1412
Delay on Make Timer -- TS14120
Delay on Make Timer -- TS14130
Delay on Make Timer -- TS1415
Delay on Make Timer -- TS1416
Delay on Make Timer -- TS1421
Delay on Make Timer -- TS1422
Delay on Make Timer -- TS1423
Delay on Make Timer -- TS1424
Delay on Make Timer -- TS1612
Delay on Make Timer -- TS1615
Delay on Make Timer -- TS1621
Delay on Make Timer -- TS1622
The TS1 Series offers proven reliability and performance with years of use in OEM equipment and commercial applications. This encapsulated general use timing module is capable of controlling load currents...
Delay on Make Timer -- TS441165 The TS4 Series are analog delay-on-make timers with a normally closed solid-state output. Unlike an interval timer, the load is energized prior to and during the time delay period. It...
Delay on Break Timer -- TSB2190
Delay on Break Timer -- TSB222
Delay on Break Timer -- TSB41300
Delay on Break Timer -- TSB422
Delay on Break Timer -- TSB434
Delay on Break Timer -- TSB632
Delay on Break Timer -- TSB634
The TSB Series is a totally solid-state, delay-on-break timing module. The TSB is available with a fixed, external, or onboard adjustable time delay. Time Delays from 0.05 to 600 seconds,...
Delay on Make Timer -- TSD1311.2S
Delay on Make Timer -- TSD1321
Delay on Make Timer -- TSD1424
The TSD1 Series is designed for more demanding commercial and industrial applications where small size and accurate performance is required. The factory calibration for fixed time delays is within 1%...
Delay on Break Timer -- TSDB320P
Delay on Break Timer -- TSDB421
Delay on Break Timer -- TSDB431
The TSDB 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%...

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