Siemens | QJ23B070HA02 | Circuit Breaker | 70A | 3-Pole | 240V | Bolt-On

Siemens QJ23B070HA02 is a 70A, 3-pole, 240V bolt-on circuit breaker designed for dependable protection in demanding electrical panels. Built for maintenance, retrofit, and replacement scenarios where exact specifications matter, this unit delivers precise, reliable performance within compatible Siemens systems.

Key features that matter in real-world use

• Amperage: 70A — protects circuits with substantial load demands without unnecessary nuisance tripping.
• Poles: 3-Pole — ideal for three-phase distribution, ensuring coordinated protection across all phases.
• Voltage rating: 240V — suitable for standard industrial and commercial distribution arrangements.
• Mounting: Bolt-On — secure, durable installation that stays firmly seated in compatible panels during operation and maintenance.
• Part reference: QJ23B070HA02 — using the exact part number is the best way to confirm compatibility with your panel and trip characteristics.

Why this Siemens circuit breaker stands out

Rather than a generic replacement, this unit is purpose-built to slot into Siemens environments where precise fit and ratings are non-negotiable. The bolt-on design simplifies field service and retrofit projects, reducing downtime while maintaining the panel’s protection profile. Its 3-pole configuration ensures synchronized interruption across all phases, which is essential for balanced loads and safer shutdowns in multi-phase systems.

Ideal use cases

• Maintenance and service upgrades for existing Siemens panels that require a 70A, 3-pole, 240V bolt-on breaker.
• Retrofit projects where modern protection must align with legacy panel architectures that rely on the QJ-series form factor.
• Replacement of failed or worn breakers within compatible distribution panels, minimizing compatibility questions and installation guesswork.

Compatibility and installation tips

Before ordering, verify fit and ratings—the line notes that the QJ23B070HA02 part number is the most reliable reference for compatibility. Ensure your panel supports bolt-on mounting and that a 70A, 240V three-phase configuration is appropriate for the circuit being protected. For best results, match the breaker to the panel model and verify the panel’s catalog data to align with Siemens’ QJ-series specifications.

Practical outcomes

• Reliable overcurrent protection across all three phases, helping prevent damage to motors, drives, and feeders.
• Faster field replacement with a secure bolt-on installation that minimizes service disruption.
• Clear path for maintenance, retrofit, or replacement projects thanks to precise part-number compatibility.