The Zinsco R38-15U tandem circuit breaker is a 2-pole, 15A, 120V overcurrent protection device for residential and light commercial panelboards, enabling two circuits to fit in a single breaker slot to maximize panel space. This plug-in (panel-mount) tandem breaker uses a thermal-magnetic trip to protect branch circuits and is compatible with Zinsco panelboards. Manufacturer part number (MPN) R38-15; Brand Zinsco. Common replacements include Connecticut Electric UBIZ215, Siemens Q1515 (panel dependent), and Eaton BR1515 (panel dependent). Status: Discontinued / legacy equipment.
