The original TQ4 relay was manufactured by Panasonic, a relay which became a popular small signal relay. This relay has not been manufactured for several years. it is obsolete and very difficult to source.
The original datasheet for the Panasonic TQ4 is available to be downloaded below.
Originally manufactured in coil voltages ranging from 3V to 48V dc, the most popular coil voltages used at the time in the telecomms and control industries were 5V, 12V and 24V
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