Can't find any info on the part you need, but maybe this might help you find a replacement. http://www.alldatasheet.com/ and enter "20A RELAY 12VDC" in "Description" search
The discussion addresses finding a replacement for the discontinued RS Components part number 348-447, identified as a 12V DC, 20A relay. Suggestions include searching datasheet databases such as alldatasheet.com using the description "20A RELAY 12VDC" to locate compatible alternatives. It is recommended to source similar 12V 20A Single Pole Change Over (SPCO) relays from old car alarm systems or equivalent devices. An alternative RS Components part, 198-6977, is proposed as a potential substitute. Additionally, availability of unused, sealed units of the original relay was offered, with options to acquire them through online vintage electronics marketplaces. Summary generated by the language model.
