GTE Sylvania R3830 Tandem Circuit Breaker 30 Amp

The Zinsco / GTE Sylvania R38 / RC38 / R3830 is a 30 Amp tandem (twin) circuit breaker designed for legacy Zinsco and Sylvania load centers, providing two independent circuits in a single breaker space to maximize panel density. It is used in residential electrical panels to serve branch circuits such as lighting, receptacles, and small-appliance loads, with two 30A single-pole circuits in one unit for panel expansion without increasing panel size. Technical specs include 120/240 VAC operation, ~10 kAIC interrupt rating, plug-in mounting compatible with Zinsco panels, and a twin configuration (two 1-pole breakers in one housing) for overcurrent and short-circuit protection in Zinsco / Sylvania Type R panels. Common replacements listed are Connecticut Electric UBIZ0230‑B, Zinsco RC3830 30A 2‑Pole Tandem Breaker, and UBIZ0230 Zinsco RC3830 Replacement Breaker.