Zinsco | UBIZ240B | Circuit Breaker | 40A | 2-Pole | 240V | Bolt-On

Meet the Zinsco UBIZ240B, a purpose-built bolt-on circuit breaker engineered for precise 40-amp protection in 240-volt circuits. This two-pole design delivers dependable dual‑leg disconnect capability, making it a solid choice for maintenance, retrofit, and replacement projects where exact fit matters.

• Amperage and voltage: 40A, 2-Pole, 240V for robust protection on high-load branch circuits.
• Mounting style: Bolt-On design for secure, solid attachment in compatible Zinsco panels.
• Identification for compatibility: Part number UBIZ240B is the key reference to verify fit. Always confirm the breaker’s compatibility with your panel before ordering.
• Intended use: Ideal for maintenance, retrofit, and replacement scenarios where a precise 2‑pole, 240V protection device is required.

Why choose the UBIZ240B for your panel upgrade or repair? It aligns with Zinsco panel configurations that rely on bolt-on protection, delivering reliable trip performance when you need to protect large appliances or multi-wire branch circuits. Its 40A rating is well-suited for circuits that demand steady, controlled protection without frequent nuisance trips, while the two-pole construction ensures simultaneous disconnection of both hot leads for enhanced safety.

Important practical notes to ensure a seamless install: before ordering, verify that the UBIZ240B matches your panel’s mounting style and electrical ratings, using the part number as the best compatibility reference. When replacing an old breaker, power should be shut off, and installation should follow standard electrical safety practices. A qualified electrician can confirm panel compatibility, torque specifications for the mounting bolts, and proper alignment with the bus bars to maintain optimal protection and reliability.

Use cases to consider: in residential or light commercial settings where a 240V circuit requires a dedicated 40A circuit breaker, the UBIZ240B can restore proper protection in a Zinsco panel that calls for bolt-on, two-pole devices. It’s particularly suitable for scenarios where a precise 240V, 40A, two‑pole solution is needed to support high‑demand appliances or equipment while preserving your panel’s protective integrity.