880159 - Programmable Bi-Stable Relays Series


The HD Series Bi‐Stable Relay (HD Relay) is designed to deliver and remotely switch vehicle loads. The HD Relay supports remote power switching applications that demand high performance; including high continuous current passage, large inverter loads, and high ambient temperature situations. The HD Relay delivers high performance in a compact size, making it a great choice for heavy‐duty vehicles, construction and agriculture equipment, military vehicles, and heavy‐duty lifting equipment.

The HD Relay is designed for harsh weather, high shock and vibration environments; typical of those found in heavy‐truck, marine, and emergency vehicle applications. The HD Relay without manual override is ingress rated to IP67 and all HD Relay products are rated for IP6K9K ingress protection to support direct high temperature high pressure wash down.

The HD Relay provides significant cost and weight benefits by eliminating the need to route heavy copper cables to more conveniently located mechanical only disconnects. Cables can instead be routed directly to loads with the HD Relay positioned close to the battery or in‐line with the desired cable routing. Remote control of the HD Relay can then be located in any convenient location on the vehicle with a fine‐wire harness linking the HD Relay to the control switch. The HD Relay family of products provide a host of additional features that add significant value for many typical applications, including:

  • Remote LED indication of state of disconnect and warning of imminent disconnect due to low battery voltage
  • Local and remote indication of state of relay (Local indication on Manual Override models only)

Customized Options

Contact Littelfuse for custom variations with unique delay features or auxiliary contact logic. Variations to control switch logic and inclusion of voltage sensing, automatic relay operation, and CAN based communication protocols may be added to customized variations of this product.

Property (Mouseover for details) Value
Description HD Relay with Manual Control and Deutsch DTM
Voltage 12V DC
Max total continuous current 300A
Sample capable No