Zinsco UBIZ20B 20A 1P 120V Circuit Breaker, Bolt-On | AmpState

Meet the Zinsco UBIZ20B—a 20A, 1-pole, 120V bolt-on circuit breaker designed to protect electrical distribution in panelboards and load centers with precision and reliability. When you need a dependable replacement or a spare that keeps your bill of materials aligned to the original part number, this UBIZ20B is purpose-built for the moment you want results you can trust.

Key specifications at a glance

• Manufacturer: Zinsco
• Part Number: UBIZ20B
• Amperage: 20 A
• Poles: 1 Pole
• Voltage: 120V
• Mounting: Bolt-On
• Category: Circuit Breaker for panelboards, load centers, and electrical distribution
• Availability: AmpState

Why this bolt-on breaker stands out

The UBIZ20B is built for secure, durable performance in everyday electrical systems. The bolt-on design provides a robust connection, helping to minimize loosening over time and maintain consistent protection for your circuits. This isn’t just a generic replacement—it's a purpose-matched part that aligns with the original BOM, reducing installation guesswork and ensuring you’re using the right component for your panel.

Ideal use cases

• Residential and light commercial panelboards that require a genuine Zinsco replacement part.
• Projects where keeping the BOM aligned to the original part number is essential for compliance and future serviceability.
• Stocking spare breakers so maintenance teams can quickly restore power without delays.

What you can expect in practice

With the UBIZ20B, you gain a dependable 20-amp protection solution for circuits that demand quick, secure interruption in the event of overloads. Its single-pole design is ideal for straightforward branch circuits, while the bolt-on mounting delivers a solid, vibration-resistant fit in the distribution panel. This is especially valuable in settings where maintenance cycles require fast replacements and consistent performance under normal operating conditions.

Compatibility and support

To confirm fit, consider your panel’s original part number and configuration. If you’re unsure about compatibility, AmpState offers assistance to help you verify the match. Message us and we’ll help you confirm fit, keeping your installation aligned with manufacturer specifications.

Who should consider the Zinsco UBIZ20B

• Electricians performing replacement work in existing Zinsco panels or compatible distribution systems.
• Facility managers and service technicians who maintain electrical infrastructure and keep BOMs intact.
• Procurement teams stocking reliable, manufacturer-aligned spares for quick turnaround on service calls.

Choose the Zinsco UBIZ20B 20A 1P 120V Bolt-On Circuit Breaker from AmpState for a component that’s designed to fit your installation precisely, support easy maintenance, and keep your electrical distribution protected with confidence.