Thomas & Betts | QB-70 | Circuit Breaker | 1-Pole | Bolt-On

The Thomas & Betts QB-70 is a purpose-built 1-pole bolt-on circuit breaker designed for maintenance, retrofit, and replacement projects where exact specifications matter. If your panel or subfeed requires a single-pole, bolt-on solution that aligns with existing hardware, the QB-70 is the match you’re looking for.

Key details

• Poles: 1-Pole
• Mounting: Bolt-On
• Reference reference: Part number QB-70 is your best guide for compatibility

Note: Before ordering, confirm fit and ratings for your specific application. The QB-70 is intended for scenarios where your panel’s specifications align with this part number, ensuring a proper, safe, and code-compliant installation.

Why this matters for your project

• The bolt-on design delivers a sturdy attachment within compatible panels, reducing movement and ensuring consistent electrical contact over time.
• Rely on the QB-70 part number as the definitive guide when matching replacements, retrofits, or maintenance components to your existing gear.
• When upgrading panel sections or replacing aging breakers, this 1-pole option provides a straightforward path to restore or maintain circuit protection without altering other hardware.

Who it's for

• Electrical contractors and facility maintenance teams tackling panel upgrades or routine replacements
• Property managers performing retrofit work in commercial or industrial environments
• Specifiers needing a precisely matched, single-pole bolt-on breaker aligned to established QB-series interfaces

Use cases and practical insights

• Maintenance cycles: Replace worn or out-of-spec breakers with a verified QB-70 that matches your original installation.
• Retrofits: When upgrading a panel to accommodate updated loads, this 1-pole bolt-on breaker provides a compatible, secure option for single-circuit protections.
• Replacement projects: Use the QB-70 as a direct reference point to source a like-for-like part when the original component is discontinued or unavailable.

Compared to alternatives

For installations requiring a bolt-on, single-pole solution, the QB-70 offers a direct, no-surprise path to compatibility. If your panel is designed for bolt-on breakers and specifies a QB-series footprint, this model minimizes guesswork compared with multi-pole or non-bolt-on options that may require panel rework or adapters.

In short, the QB-70 from Thomas & Betts is a reliable, specification-focused choice for professionals who need a precise, single-pole bolt-on breaker that aligns with existing hardware and maintenance workflows. Always verify fit and ratings with the part number to ensure a seamless, code-compliant installation.