Westinghouse BR3100ST 100A 3P 240V Circuit Breaker, Type BR, Plug-On, Shunt Trip | AmpState

The Westinghouse BR3100ST 100A 3P 240V Circuit Breaker delivers dependable, code-compliant protection in panelboards, load centers, and electrical distribution networks. Built for exact-fit replacements, this Type BR plug-on unit with a shunt trip expands safety and control options in demanding environments.

Why choose the BR3100ST

• Exact part-number match for BR-series installations, minimizing downtime and compatibility concerns for maintenance teams, panel builders, and spare inventories.
• Plug-On mounting for fast, secure installation without complex wiring adjustments in compatible panelboards and distribution panels.
• Shunt Trip capability enables remote or automated tripping for emergency shutoffs, interlock systems, or building automation integration—enhancing safety and control across your electrical distribution.
• Three-pole design with a 100 A rating provides robust protection across all three phases in 240V systems, helping prevent damage from overloads and short circuits.
• Versatile application ideal for industrial floors, data centers, commercial facilities, and any installation requiring reliable 3-phase protection with remote trip readiness.
• Available from AmpState to simplify procurement and stocking of critical spares.

What problems does it solve?

When your electrical distribution relies on rapid, predictable protection and safe remote control, the BR3100ST delivers. The shunt trip feature supports immediate isolation during safety incidents or automation events, reducing the risk of collateral damage and speeding down-time recovery. Its plug-on design simplifies field replacement, helping you maintain continuity without extensive rewiring. And because it’s a direct BR-series match, you’re securing a proven, compatible solution for your BR panelboards and load centers.

Technical essentials

• Manufacturer: Westinghouse
• Part Number: BR3100ST
• Type: BR
• Amperage: 100 A
• Poles: 3
• Voltage: 240 V
• Mounting: Plug-On
• Trip feature: Shunt Trip (remote/automatic tripping)

Who is this best for?

• Maintenance teams and facilities managers who need reliable, exact-replacement BR-series breakers.
• Panel builders and electrical distributors seeking a ready-to-install 3P 240V solution with remote trip capability.
• Anyone maintaining spare inventory for critical electrical distribution systems where a direct part-number match matters.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.