Thomas & Betts TBBQ240240 Quadplex Circuit Breaker

The Thomas & Betts TBBQ240240 Quadplex Circuit Breaker is a plug-in, quadplex thermal‑magnetic breaker that provides two independent 2‑pole, 40 A circuits in the space of two standard breaker positions. It protects two separate 120/240 VAC branch circuits with a 10 kA interrupting capacity (10 kAIC) and independent trip operation, making it suitable for residential, commercial, and light industrial panels. Featuring a CTL rejection tab for compatibility with CTL load centers, this 4‑pole device accepts #14–4 AWG copper or aluminum wires and mounts in Thomas & Betts Type BR compatible load centers and panelboards. The unit is UL 489 Listed and complies with Federal Specification W‑C375. Its approximate dimensions are 3 in. L × 2 in. W × 3 in. H, with an approximate weight of 0.7 lb. Common applications include HVAC equipment, electric water heaters, air conditioning systems, subpanels, and multi‑wire branch circuits in 120/240 VAC systems. Common replacements include TBBQ220230, TBBQ220250, and TBBQ230230.