Zinsco | Q243050 | Circuit Breaker | 50A | 3-Pole | 240V | 10kA | Plug-In

Introducing the Zinsco Q243050 — a 50A, 3-pole plug-in circuit breaker designed for 240V systems. This unit delivers dependable overcurrent protection for multi-wire and three-pole configurations in compatible panels, ensuring your electrical system stays safeguarded during peak loads and fault events.

Ideal for maintenance, retrofit, and replacement projects where exact specifications matter, the Q243050 plugs into compatible Zinsco panels for fast, downtime-minimizing service. Use it when your installation requires a matching part number with a 50A rating and a 3-pole, 240V configuration.

Key specifications

• Amperage: 50A
• Poles: 3-Pole
• Voltage: 240V
• Interrupting rating: 10kA
• Type: Plug-In

Fit, compatibility, and installation notes

Before ordering, confirm fit and ratings for your panel. The Q243050 part number is the best reference to ensure compatibility with your Zinsco system.

Use cases and who it's for

• Maintenance and service on existing Zinsco panels that require a 50A, 3-pole, 240V plug-in breaker
• Retrofit projects where upgrading protective devices with matching specs is needed
• Replacement scenarios to restore or upgrade circuit protection without changing the panel

Why this matters

The combination of a 50A rating, three-pole configuration, and 240V operating voltage provides robust protection for higher-current circuits and equipment operating in multi-wire environments. The 10kA interrupting rating helps ensure safe disconnection under fault conditions, reducing risk to wiring and connected loads.