The original DF2 relay was manufactured by Panasonic, a relay which became a popular version of the classic telecomms. BT53 type small signal relays. This relay has not been manufactured for many years. it is obsolete and very difficult to source.
The original datasheet for the Panasonic DF2 relay is available to be downloaded below.
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
The Cephos C-BT53 relay module is a drop-in replacement for this obsolete Panasonic DF2 relay
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