Zinsco R-38-20 Residential 20 Amp Tandem Circuit Breaker

The Zinsco R-38-20 Residential 20 Amp tandem circuit breaker is a two-pole, plug-in tandem device that lets two circuits share a single panel slot, providing overcurrent protection for 120/240V electrical systems in residential and light commercial distributions. It is a 2-Pole (tandem configuration), plug-in (panel mount) device rated at 20A and 120/240V with a thermal-magnetic trip for overcurrent protection, and it is compatible with Zinsco panelboards; the product status is Discontinued / legacy equipment. Common replacements include Connecticut Electric UBIZ220 and Siemens Q2020 (non-direct fit, panel dependent), and Eaton BR2020 (panel dependent).