ABB TEYD3015B Bolt-On Circuit Breaker

ABB TEYD3015B is a three‑pole, 15 A bolt‑on molded‑case circuit breaker designed for grounded 480Y/277 VAC distribution. The TEY family uses a one‑inch wide per‑pole frame for compact bolt‑on mounting in panelboards, and the TEYD3015B accepts solid or stranded conductors from #14 to #10 AWG with load‑lug terminations. It provides thermal‑magnetic protection with a non‑interchangeable trip unit, suitable for protecting feeders and branch circuits. It carries a 25 kA interrupting rating at 480/277 VAC, and is intended for installation in lighting panelboards, including ABB A‑Series designs, where space savings are important in three‑phase power distribution. The unit is rated for 40°C ambient operation and is typically used to protect three‑phase loads such as lighting, motors, and general distribution circuits in commercial facilities. In addition to TEYD3015B, the TEY family includes TEYH3015B and TEYL3015B variants, providing consistent protection across a panel with uniform trip characteristics.