Fujitsu BT53 relay

Status: Obsolete


Two pole telecom / signal relay, polarised, 2 pole changeover / 2 Form C / DPDT

Product details

The  original BT53 relay was manufactured by Fujitsu, a relay which became a classic telecomms. small signal relay. This relay is now obsolete and very difficult to source.

Original datasheets for the Fujitsu BT53 and BT53/W are no longer available, the data has been derived from the more popular, later, Fujitsu FBR46ND series of telecommunication relays. The datasheet is downloadable below.


Coil Voltages

Originally manufactured in coil voltages ranging from 1.5V to 24V dc, the most popular coil voltages used at the time in the telecomms and control industries were 5V, 12V and 24V

Cephos Alternatives

Technical data and specification

Max. Sw. Power

Max. Sw. Voltage

Max. Sw. Current


Low Coil Power

30W / 60VA



Gold-overlay silver-palladium

5V/12V: 150mW, 24V: 250mW

Original BT53 relay dimensions

Fujitsu FBR46 datasheet

The original relay specification and operating data

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