Category: Company Updates

Replacing Obsolete TE High Current Relays

In response to TE Connectivity issuing end-of-life for high current relays to optimize current product offerings, Chief approached EGIS Mobile to create a drop-in replacement to fill a need in the market. 

When replacing an obsolete relay, it is first important to determine the number of circuits and contacts, which is influenced by the relay’s “poles and throws.” Relays can be categorized into four classes based on their poles and throws including: single-pole single-throw relays, single-pole double-throw relays, double-pole single-throw relays, and double-pole double-throw relays. Certain applications require a specific type of relay, as different amperage and current ratings can change the current flow and also hamper device performance. 

It is not wise to replace a relay with just any relay, as even one incorrect specification, will create an issue. The problem arises when existing relays become obsolete and suitable replacements are unavailable. If you run into issues selecting a replacement, Chief Enterprises’ website has a live chat with our customer service department. They will facilitate the connection with our engineering team to ensure the proper relay is selected for your application.

Keeping this in mind, let’s look at an obsolete high current relay from TE, identified by the part number V23232D0001X001 (alternative part number 1904000-1). Chief needed to identify another relay with similar specifications and the exact application usage to provide a suitable replacement for our customers. This new relay is manufactured by EGIS, and is identified by the part number 901488. As you compare the specifications such as current rating, voltage, contact materials and terminology, you can see that both relays are identical. 

For example, both of these relays have a coil voltage of 12 VDC and a current rating of 50A at 85° Celsius. Additionally, the contact form for these relays is single-pole single-throw (1 Form A). The only clear difference between the makeup of these relays is the material, as the obsolete relay is made from silver alloy (Ag) while the replacement uses silver tin oxide (AgSnO). When it comes to size, the two relays are quite similar with the EGIS replacement being slightly larger, except in height. 

Similarly, the obsolete high current relay from TE, identified by part number V23232A0001X003 (alternative part number 1904001-2), can be replaced by an EGIS relay, part number 901643.