Schneider Electric QOB290VH1021 Shunt Trip Circuit Breaker

Schneider Electric's Square D QOB290VH1021 is a two-pole QOB miniature circuit breaker rated for 90 A at 120/240 VAC, with a 22 kA short‑circuit interrupt rating and common-trip operation for simultaneous pole isolation. Designed for bolt-on mounting in compatible QOB panelboards, it includes an AC shunt‑trip coil that enables remote tripping from a control circuit for safety interlocks or emergency shutdowns. The VH1021 suffix identifies the shunt‑trip variant for 120/240 VAC service, and the device is specified for ambient temperatures up to 104°F (40°C). Box-lug terminations and conductor ranges are compatible with 4 AWG through 2/0 AWG conductors, aligning with common wiring practices in commercial installations. Its compact dimensions measure about 3.50 in high, 2.24 in wide, and 2.91 in deep, making it a space‑efficient choice within Schneider Electric’s QOB family for protecting feeders and branch circuits in light industrial and commercial panels.