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Littelfuse Time Delay Relays

Littelfuse time delay relays are specialized electrical components designed to provide controlled timing functions in various circuits and applications. These relays are particularly useful in scenarios where a specific time delay is required before activating or deactivating a circuit. They are commonly used in industrial control systems, automotive applications, and various other electronic systems.

The fundamental feature of a Littelfuse time delay relay is its ability to delay the electrical signal for a preset period. This delay can be either in the activation (on-delay) or deactivation (off-delay) of a circuit. For instance, in an on-delay configuration, the relay will wait for a predetermined time after receiving the control signal before closing the contacts and completing the circuit. Conversely, in an off-delay setup, the relay keeps the circuit closed for a set time after the control signal is removed before opening the contacts.

Littelfuse designs its time delay relays to be highly versatile, offering a range of time settings that can be easily adjusted to meet specific requirements. This flexibility is essential for customization in various applications, allowing users to set the delay time according to their specific needs.

Products

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$102.79
Littelfuse TSU2000 is a reliable and compact device with a 1A steady state load rating and 10A inrush at 55°C. It features 0.25 in. male quick connect terminals for easy installation. Operating at 50/60Hz with a ±20% input tolerance, this product ensures accuracy with ±2% repeat accuracy and ≤±10% time delay tolerance. With an insulation resistance of ≥100, dielectric breakdown of ≥2000V, and humidity resistance of 95% non-condensing, it is highly durable. The analog time delay type and quick ≤100ms reset time further enhance its functionality.
$108.46
Littelfuse TSS624 is a compact and reliable thermal overload sensor. It features a 1A steady-state output load rating with a 10A inrush at 60°C. It has 0.25 inch male quick connect terminals for easy installation. The frequency tolerance for the input AC line is ±20%, and it can operate at 50/60Hz. The device is encapsulated and has a power consumption of ≤2VA. It has a reset time of ≤150ms and a time delay tolerance of ≤±5%. The insulation resistance is ≥100, and the dielectric breakdown is ≥2000V. The output voltage drop is approximately 2.5V at 1A, and the open state leakage current is approximately 5A at 230V AC. It has a humidity rating of 95% non-condensing and repeat accuracy of ±2% or 20ms, whichever is greater. The setpoint vs ambient temperature and operating voltage is within ≤±10%. The initiate time is ≤20ms. This thermal overload sensor is a reliable solution for various applications.
$108.46
Littelfuse TSS622 is an encapsulated solid-state relay with 0.25 in. male quick connect terminals. It has an output load rating of 1 A steady state and 10 A inrush at 60°C. The relay operates at an input AC line frequency of 50/60 Hz with a tolerance of ±20%. It is humidity resistant (95% non-condensing) and has a repeat accuracy of ±2% or 20 ms. The insulation resistance is ≥100 and the setpoint vs ambient temperature and operating voltage is ≤±10%. The power consumption is ≤2 VA and the time delay tolerance is ≤±5%. The reset time is ≤150 ms and the dielectric breakdown is ≥2000V terminals to mounting surface. The output voltage drop is ≅2.5V at 1A and the open state leakage current is ≅5A at 230V AC. The initiate time is ≤20 ms.
$113.62
Littelfuse TSS424 is a compact and reliable solid state relay. It has a load rating of 1A steady state and 10A inrush at 60°C. The termination type is 0.25 in. male quick connect terminals. It operates at an input AC line frequency of 50/60Hz with tolerance of ±20%. The relay has a humidity rating of 95% and repeat accuracy of ±2%. It has excellent insulation resistance of ≥100 and offers a reset time of ≤150ms. The relay is encapsulated and consumes a power of ≤2VA. It has a time delay tolerance of ≤±5% and a dielectric breakdown of ≥2000V. The output voltage drop is ≅2.5V @ 1A and the open state leakage current is ≅5A @ 230Vac. The initiate time is ≤20ms.
$113.62
Littelfuse TSS422 is an encapsulated time delay relay with a power consumption of ≤2 VA. It features male quick connect terminals, a steady state output load rating of 1 A, and a 10 A inrush at 60°C. With a reset time of ≤150 ms and repeat accuracy of ±2% or 20 ms, it guarantees reliable performance. The relay also has a dielectric breakdown of ≥2000V and an insulation resistance of ≥100 for added safety.
$113.62
Littelfuse TSS421 is an encapsulated solid state relay with a 1A steady state and 10A inrush load rating at 60°C. It features 0.25 in. male quick connect terminals and operates at an input AC line frequency of 50/60 Hz. With a humidity resistance of 95%, it provides repeat accuracy of ±2% or 20ms (whichever is greater). This relay offers insulation resistance of ≥100 and has a power consumption of ≤2 VA. It has a time delay tolerance of ≤±5% and a reset time of ≤150ms. The dielectric breakdown is ≥2000V between terminals and mounting surface. Output voltage drop is approximately 2.5V @ 1A and open state leakage current is approximately 5A @ 230V AC. The initiate time is ≤20ms.
$111.56
Littelfuse TSS410.5 is a compact and durable temperature-sensitive switch designed for various applications. It features a 1A steady state output load rating and 10A inrush at 60°C. The termination type is 0.25 in. male quick connect terminals for easy installation. With an input tolerance of ±20% and repeat accuracy of ±2% or 20ms, this switch offers precise and reliable performance. It is encapsulated for added circuitry protection and has a power consumption of ≤2 VA. The TSS410.5 also has a quick reset time of ≤150ms and a dielectric breakdown of ≥2000V.
$142.74
Littelfuse TSDS421 is an encapsulated circuitry with a power consumption of ≤2 VA. It features 0.25 in. male quick connect terminals, ±15% input tolerance, and a repeat accuracy of ±0.5% or 20 ms. With an output load rating of 1 A steady state and 10 A inrush @ 60°C, it offers reliable performance.
$149.09
Littelfuse TSDS321P is a compact and reliable solid state relay with a 1A steady state and 10A inrush load rating. It features 0.25 inch male quick connect terminals for easy installation and has an input tolerance of ±15%. With a repeat accuracy of ±0.5% or 20ms, it ensures precise and consistent performance. The encapsulated circuitry and insulation resistance of ≥100 provides safety and durability. With a power consumption of ≤1W and time delay tolerance of ≤±1%, it is efficient and responsive. It has a reset time of ≤150ms and a dielectric breakdown of ≥2000V for added safety. The output voltage drop is approximately 1V at 1A, and it has an open state leakage current of approximately 1A. With an initiate time of ≤20ms and reverse polarity protection for DC units, it is easy to use and reliable. Its DC operation allows for positive switching, and with a ≤10% input DC ripple, it ensures smooth and consistent operation.
$142.74
Littelfuse TSDS320N is an encapsulated solid-state relay with a maximum output load rating of 1 A steady state and 10 A inrush at 60°C. It features 0.25 in. (6.35 mm) male quick connect terminals for easy termination. With a humidity resistance of 95% relative non-condensing and a repeat accuracy of ±0.5% or 20 ms, it provides reliable performance. The relay has a power consumption of ≤1 W and a reset time of ≤150 ms. It offers excellent insulation resistance (≥100) and dielectric breakdown (≥2000V terminals to mounting surface) capabilities. With ≤±2% setpoint vs ambient temperature and operating voltage tolerance and ≤±1% time delay tolerance, it ensures accurate control. The DC units are reverse polarity protected and operate with ≤10% input DC ripple.
$142.74
Littelfuse TSDS2110S is an encapsulated time-delay relay with a steady state output load rating of 1A and a 10A inrush at 60°C. It has 0.25 in. (6.35 mm) male quick connect terminals for easy termination. With an input AC line frequency of 50/60Hz and an input tolerance of ±15%, it offers reliable performance. The relay has a repeat accuracy of ±0.5% or 20ms, whichever is greater, and an insulation resistance of ≥100. It has a power consumption of ≤2 VA and a time delay tolerance of ≤±1%. The reset time is ≤150ms. It also features a dielectric breakdown of ≥2000V and an output voltage drop of ≅2.5V at 1A. The open state leakage current is ≅5A @230V AC, and the initiate time is ≤20ms.
$142.74
Littelfuse TSDR6110SA30S is an encapsulated solid-state relay with a 1A steady state and 10A inrush load rating at 60°C. It features 0.25 in. male quick connect terminals for easy installation. It operates at input AC line frequencies of 50/60 Hz with a tolerance of ±20%. With a humidity resistance of 95% relative non-condensing, it ensures reliability. The relay has a repeat accuracy of ±0.5% or 20 ms and insulation resistance of ≥100. It has a power consumption of ≤2 VA and time delay tolerance of ≤±5%. Its reset time is ≤150 ms, and it has a dielectric breakdown of ≥2000V terminals to mounting surface. The output voltage drop is approximately 2.5V at rated current, and the open state leakage current is around 5A at 230V AC.