Zinsco | QCB30 | Circuit Breaker | 2-Pole | 240V | 10kA | Bolt-On

Meet the Zinsco QCB30: a dependable 2-Pole 240V bolt-on circuit breaker designed for maintenance, retrofit, and replacement projects where exact specifications matter. This dedicated part keeps your electrical system protected with a focus on compatibility and longevity.

• 2-Pole, 240V protection offers robust overcurrent interruption for standard branch circuits and shared loads, helping maintain safe operation across your panel.
• Bolt-On mounting provides secure installation in compatible Zinsco panels, delivering a reliable connection that stays put under vibration and load changes.
• 10kA interrupting capacity delivers strong protection for wiring and devices against short circuits, reducing the risk of damage during fault conditions.
• Ideal for maintenance, retrofit, and replacement when you need an exact spec match to restore panel performance without unnecessary alterations.
• Clear compatibility reference The part number is the best reference for compatibility, with QCB30 identified as the precise model for matching specs.

Technical specifications at a glance

• Poles: 2-Pole
• Voltage: 240V
• Interrupting Capacity: 10kA
• Mounting: Bolt-On
• Part Number: QCB30

Who benefits from the Zinsco QCB30

Property owners and technicians working with legacy Zinsco panels will find this breaker essential for reliable restoration. It’s especially suited for retrofit projects where exact spec matching is critical, and for replacements where panel compatibility is a prerequisite to safe, code-compliant operation.

Fit, use, and safety notes

Before ordering, confirm the breaker’s fit and ratings against your panel. The QCB30 part number is the best reference for compatibility, so verify your panel model and bus configuration align with this specification. Install in accordance with local electrical codes and manufacturer guidelines to ensure safe, long-lasting performance.

Whether you’re upgrading an aging electrical system or replacing a failed component, the Zinsco QCB30 delivers targeted protection with a clear path to reliable operation—backed by a part designed for precise spec alignment and dependable, straightforward installation.