Siemens | QJ3B070HA01 | Circuit Breaker | 70A | 3-Pole | 240V | Bolt-On

Meet the Siemens QJ3B070HA01 Circuit Breaker—a purpose-built 70A, 3-Pole device designed for 240V three-phase systems. This bolt-on breaker is crafted for maintenance, retrofit, and replacement projects where exact specifications matter, delivering dependable protection with straightforward installation.

Key specifications

• Amperage: 70A
• Poles: 3-Pole
• Voltage: 240V
• Mounting: Bolt-On
• Part number: QJ3B070HA01
• Ideal for: maintenance, retrofit, and replacement where exact specs are required

Why this Siemens breaker stands out

• The part number QJ3B070HA01 is the most reliable reference for compatibility, helping you avoid misfits in demanding panels.
• Secure bolt-on mounting: The bolt-on design provides a solid, vibration-resistant connection ideal for commercial and light industrial panels.
• Clear 3-phase protection: Specifically suited for 3-pole, 240V applications, giving you straightforward, dependable overcurrent protection for every leg of the system.
• Trade-ready replacement: A practical choice for retrofit or replacement projects where matching Siemens specifications minimizes panel modifications.

Ideal use cases

• Maintenance: swap-in a like-for-like breaker to restore original protection after a fault or wear.
• Retrofit: upgrade or refresh existing 240V 3-phase panels that require a 70A, 3-pole bolt-on unit.
• Replacement: quickly replace an aging breaker with a Siemens QJ-series-compatible part to maintain consistent electrical protection.

Installation and compatibility tips

Before ordering, confirm fit and ratings to ensure a seamless installation. Use the part number QJ3B070HA01 as your primary compatibility reference, and verify that the panel design accepts bolt-on breakers and supports 70A, 240V 3-phase protection. This approach helps minimize downtime and ensures you’re maintaining the manufacturer's intended protection scheme.