The CH-BT53 relay module is manufactured by Cephos Electronic Circuits Ltd. in the UK – an alternative relay module to replace several classic telecomms. small signal relays that have not been manufactured for several years and are now obsolete and very difficult to source.

Common versions of these obsolete relays are the Fujitsu BT53 and BT53W types, together with Panasonic DF2, Omron G5A and Fujitsu FBR46 relays.

This new module for 2019, the CH-BT53 relay module, is a drop-in replacement for all of the popular BT53 types listed above and it is fitted with the ever-popular Hongfa HFD4 small signal relay, the full specification is below together with a downloadable datasheet

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

The Cephos CH-BT53 5V, 12V and 24V coil voltage versions are normally ex-stock and available for immediate shipping, other coil voltages are manufactured to order on a short lead time ( subject to component availability)

CH-BT53 Relay Module

Technical data and specification

Maximum switching power: 60W / 62.5VA
Maximum switching voltage: 220Vdc / 250Vac
Maximum switching current 2A
Contacts: AgNi + Au covered
Low coil power: 5 – 12V: 140mW / 24V: 200mW 

Module dimensions

Operation parameters

Pick-up voltage Vdc(max): 3.75
Drop-out voltage Vdc(min): 0.5
Coil resistance (ohms): 178 x (1 +/- 10%)
Nominal power (mW approx): 140
Maximum operating voltage Vmax: 7.5

Pick-up voltage Vdc(max): 9.0
Drop-out voltage Vdc(min): 1.2
Coil resistance (ohms): 1028 x (1 +/- 10%)
Nominal power (mW approx): 140
Maximum operating voltage Vmax: 18.0

Pick-up voltage Vdc(max): 18.0
Drop-out voltage Vdc(min): 2.4
Coil resistance (ohms): 2880 x (1 +/- 10%)
Nominal power (mW approx): 200
Maximum operating voltage Vmax: 36.0

CH-BT53 datasheet

Downloadable datasheet detailing the obsolete versions and operating data
DOWLOAD

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