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 117 items
Normally In Stock
Littelfuse ERDM126 Time Delay Relay - 12 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$131.33
$109.44
Normally In Stock
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 TDM230AL Time Delay Relay - 230 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$165.41
$137.84
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Littelfuse ERDM4210 Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$131.33
$109.44
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Littelfuse ORM120A25 Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$103.49
$86.24
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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 ERDM425 Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$131.33
$109.44
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Littelfuse ORM24D13.5 Time Delay Relay - 24 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$103.49
$86.24
Normally In Stock
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 TDU3003A Time Delay Relay - 120-277 Volt, Normally Open
Free U.S Ground shipping
$74.30
$61.92
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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 TS14120 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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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 TS1416 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TS1421 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TS1422 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TS1423 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TS1424 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TS1612 Time Delay Relay - 230 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
Normally In Stock
Littelfuse TS1615 Time Delay Relay - 230 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
Normally In Stock
Littelfuse TS1621 Time Delay Relay - 230 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
Normally In Stock
Littelfuse TS1622 Time Delay Relay - 230 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TS441165 Time Delay Relay - 120 Volt, Normally Closed
Free U.S Ground shipping
$85.25
$71.04
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Littelfuse TSD1311.2S Time Delay Relay - 24 Volt (DC), Normally Open
Free U.S Ground shipping
$111.64
$93.03
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Littelfuse TSD1321 Time Delay Relay - 24 Volt (DC), Normally Open
Free U.S Ground shipping
$111.64
$93.03
Normally In Stock
Littelfuse TSD1424 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$110.58
$92.15
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Littelfuse ERDM123 Time Delay Relay - 12 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$131.33
$109.44
Normally In Stock
Littelfuse TS14130 Time Delay Relay - 120 Volt, Normally Open
Free U.S Ground shipping
$85.25
$71.04
Normally In Stock
Littelfuse T10S400 Time Delay Relay - 115 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$256.01
$213.34
Normally In Stock
Littelfuse TDM120AL Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$151.02
$125.85
Normally In Stock
Littelfuse TDML24DL Time Delay Relay - 24 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$154.60
$128.83
Normally In Stock
Littelfuse ORM24D22 Time Delay Relay - 24 Volt (DC), Double Throw, Double Pole
Free U.S Ground shipping
$103.49
$86.24
Normally In Stock
Littelfuse PRLM41180 Time Delay Relay - 120 Volt, Double Throw, Double Pole
Free U.S Ground shipping
$160.51
$133.76
Normally In Stock
Littelfuse T10120 Time Delay Relay - 115 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$256.01
$213.34
Normally In Stock
Littelfuse T10200 Time Delay Relay - 115 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$256.01
$213.34
Normally In Stock
Littelfuse KRDM310.2S Time Delay Relay - 24 Volt (DC), Double Throw, Single Pole
Free U.S Ground shipping
$100.85
$84.04
Normally In Stock
Littelfuse KRDM4110S Time Delay Relay - 120 Volt, Double Throw, Single Pole
Free U.S Ground shipping
$100.85
$84.04

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.