Littelfuse Time Delay Relays

Littelfuse time delay relays are designed to provide accurate and repeatable timing control in electrical and electronic systems. These relays introduce a controlled delay into a circuit, allowing equipment to start, stop, or sequence operations in a predictable manner. RSP Supply carries a full line of Littelfuse time delay relays, including delay on make (on-delay) and delay on break (off-delay) models for a wide range of applications.

In a delay on make configuration, the relay waits for a preset period after receiving a control signal before energizing the output contacts. This function is commonly used to stagger equipment startup, prevent inrush current issues, or allow systems to stabilize before operation. Delay on break relays, by contrast, maintain the output state for a set time after the control signal is removed, making them useful for controlled shutdowns, fan run-on circuits, and process timing requirements.

Littelfuse time delay relays offer adjustable timing ranges to support application-specific needs. Their rugged construction allows reliable operation in environments exposed to vibration, temperature variation, and electrical noise. Designed for straightforward installation and setup, these relays are well-suited for use in industrial control panels, automation systems, and other applications where dependable timing control is required.

Found 451 items
Normally In Stock
Littelfuse HRV43AE Time Delay Relay - 120 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$205.75
$171.46
Normally In Stock
Littelfuse KSD2420 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$75.18
$62.65
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Littelfuse HRV41AE Time Delay Relay - 120 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$205.75
$171.46
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Littelfuse HRDI117S Time Delay Relay - 12 Volt (DC), Double Throw, Single Pole
Free U.S Ground shipping
$135.37
$112.81
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Littelfuse HRDB117S Time Delay Relay - 12 Volt (DC), Double Throw, Single Pole
Free U.S Ground shipping
$135.37
$112.81
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Littelfuse ESDR320A0P Solid State Timer (Recycling)
Free U.S Ground shipping
$128.84
$107.37
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Littelfuse HRDB623 Time Delay Relay - 230 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$135.37
$112.81
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Littelfuse CT1S30 Time Delay Relay - 24 Volt, Normally Open
Free U.S Ground shipping
$69.77
$58.14
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Littelfuse CT1S45 Time Delay Relay - 24 Volt, Normally Open
Free U.S Ground shipping
$69.77
$58.14
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Littelfuse ERDM126 Time Delay Relay - 12 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$131.33
$109.44
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Littelfuse KSD1230 Time Delay Relay - 24 Volt, Normally Open
Free U.S Ground shipping
$75.18
$62.65
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Littelfuse TDM12DL Time Delay Relay - 12 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$151.02
$125.85
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Littelfuse TDMB422D Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$212.41
$177.01
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Littelfuse TDUS3000A Time Delay Relay - 24-120 Volt, Normally Open
Free U.S Ground shipping
$130.81
$109.01
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Littelfuse THDB421A Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$120.95
$100.79
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Littelfuse TSB2190 Delay On Break Timer
Free U.S Ground shipping
$92.03
$76.69
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Littelfuse TSB222 Delay On Break Timer
Free U.S Ground shipping
$92.03
$76.69
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Littelfuse TS14120 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse HRV42SE Time Delay Relay - 120 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$205.75
$171.46
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Littelfuse TSA141300 Anti-Short Cycle
Free U.S Ground shipping
$90.40
$75.33
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Littelfuse TSD61115SP Time Delay Relay - 12 Volt (DC), Normally Open
Free U.S Ground shipping
$115.56
$96.30
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Littelfuse TS1415 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TS24130 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TS6122P Time Delay Relay - 12 Volt (DC), Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TRDU12D2 Time Delay Relay - 12 Volt (DC), Double Throw, Single Pole
Free U.S Ground shipping
$204.06
$170.05
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Littelfuse TRDU120A1 Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$204.06
$170.05
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Littelfuse THDS431C Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$120.95
$100.79
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Littelfuse TSDR415SB18M Solid State Timer (Recycling)
Free U.S Ground shipping
$110.65
$92.21
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Littelfuse TSD7424 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$87.84
$73.20
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Littelfuse TSD94110SB Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$110.65
$92.21
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Littelfuse TDMB622 Time Delay Relay - 230 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$212.41
$177.01
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Littelfuse TDR4A33 Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$209.11
$174.26
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Littelfuse TDU3003A Time Delay Relay - 120-277 Volt, Normally Open
Free U.S Ground shipping
$74.30
$61.92
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Littelfuse TDS12D Time Delay Relay - 12 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$209.34
$174.45
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Littelfuse TDMB413D Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$212.41
$177.01
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Littelfuse TDUIL3002A Time Delay Relay - 12-24 Volt (DC), Normally Open
Free U.S Ground shipping
$130.81
$109.01
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Littelfuse TH1B633 Time Delay Relay - 230 Volt, Normally Open
Free U.S Ground shipping
$131.63
$109.69
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Littelfuse TDM230AL Time Delay Relay - 230 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$165.41
$137.84
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Littelfuse T10400 Time Delay Relay - 115 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$256.01
$213.34
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Littelfuse TDML12DL Time Delay Relay - 12 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$154.60
$128.83
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Littelfuse TA24A0.5 Lockout Timer
Free U.S Ground shipping
$80.34
$66.95
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Littelfuse TA24A3 Lockout Timer
Free U.S Ground shipping
$80.34
$66.95
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Littelfuse KSPDA2222RXE Programmable Timer
Free U.S Ground shipping
$115.56
$96.30
Normally In Stock
Littelfuse ORM120A25 Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$103.49
$86.24

FAQs

Q: What is a time delay relay?
A time delay relay is an electrically operated switch that introduces a preset delay before changing the state of its output contacts, allowing controlled timing of electrical circuits.

Q: What is the difference between delay on make and delay on break?
Delay on make delays the activation of the output contacts after the control signal is applied. Delay on break delays the deactivation of the output contacts after the control signal is removed.

Q: Where are Littelfuse time delay relays commonly used?
They are commonly used in industrial automation, motor control, lighting systems, HVAC equipment, and automotive applications where timed control is required.

Q: Are the delay times adjustable?
Yes, many Littelfuse time delay relays feature adjustable timing ranges, allowing users to set precise delay intervals to match specific application requirements.

Q: Are time delay relays easy to install and configure?
Yes, Littelfuse time delay relays are designed with user-friendly interfaces and mounting options, making installation and timing adjustment straightforward.

Why Buy Littelfuse Time Delay Relays from RSP Supply

RSP Supply offers a complete selection of Littelfuse time delay relays engineered for reliable and precise timing control. Our products support both delay on make and delay on break functions and are suitable for a wide range of industrial and electronic applications. Customers rely on RSP Supply for trusted brands, technical expertise, and dependable solutions for timing and control needs.