Siemens | QJH23B175L | Circuit Breaker | 175A | 3-Pole | 240V

Siemens QJH23B175L is a rugged 175 Amp, 3‑Pole, 240V circuit breaker designed to protect three‑phase electrical systems with precision. Built for maintenance, retrofit, and replacement projects, this unit delivers reliable overcurrent protection where Siemens panel architectures require exact part matching.

Why this Siemens QJH23B175L matters in your electrical setup

• Three‑phase protection at 240V: Ideal for commercial and light industrial panelboards handling three‑phase loads, motors, and feeders.
• High‑capacity amperage: 175A rating supports substantial feeder protection and circuit loads typical of mid‑sized systems.
• Direct reference part number: Use QJH23B175L as the primary compatibility reference to ensure correct fit in compatible Siemens configurations.
• Versatile replacement option: A reliable choice when upgrading or replacing aging breakers that match the same specs and form factor.

Key specifications at a glance

• Amperage: 175 A
• Poles: 3‑Pole
• Voltage: 240V
• Application: Maintenance, retrofit, and replacement in compatible Siemens panels

Ideal use cases

Use this breaker to safeguard three‑phase feeders in commercial electrical rooms, manufacturing lines, or HVAC motor circuits where a 175A, 240V protection device is required. It’s well suited for panel retrofits where legacy breakers are being replaced with a Siemens equivalent that matches the original ratings and form factor.

Compatibility and installation notes

Before ordering, confirm fit and ratings for your specific panel. The part number QJH23B175L is the most reliable reference for compatibility. If in doubt, consult your panel’s documentation or a qualified electrician to verify that this 3‑pole, 240V unit aligns with your Siemens configuration and three‑phase load requirements.

Practical tips for best results

• Match the breaker to the panel’s catalog and the existing conductors’ ampacity to ensure safe, code‑compliant protection.
• When replacing an old breaker, inspect wiring terminations and torque requirements to maintain a solid, secure connection.
• Store and handle the breaker in a clean, dry environment to preserve its trip mechanism and terminals until installation.