Siemens WLST120 120V Circuit Breaker, Shunt Trip | AmpState

The Siemens WLST120 is a 120V circuit breaker with an integrated shunt trip, crafted for reliable protection in panelboards, load centers, and broader electrical distribution systems. Built by Siemens, this device is a trusted choice for projects where precise part matching and dependable performance matter. It’s especially valuable for maintenance teams, panel builders, and spare inventories that rely on direct part-number consistency.

Key advantages you’ll feel with the WLST120

• Direct part-number match: Simplifies stocking, sourcing, and replacements, reducing downtime when you need a known, compatible component.
• Remote trip capability: The shunt trip feature enables fast, controlled disconnection in response to an electrical signal, enhancing safety and coordination with building systems or safety interlocks.
• Reliable 120V protection: Suited for circuits governed by standard 120V distribution, delivering dependable interruption when faults or overloads occur.
• Versatile usage: Well-suited for protecting equipment and wiring in panelboards, load centers, and diverse electrical distribution layouts.
• Accessible from AmpState: Available through AmpState, with support to verify fit and compatibility for your specific installation.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: WLST120
• Product Type: Circuit Breaker
• Voltage: 120V
• Feature: Shunt Trip

Why this matters in real-world installations

In facilities where safety, rapid response, and system coordination are critical, the WLST120’s shunt trip adds a valuable layer of control. It’s ideal for maintenance scenarios, where technicians need a remote or automated disconnection option during testing, service work, or emergency shutdown procedures. For panel builders, carrying a direct Siemens WLST120 part-number simplifies procurement and ensures compatibility with existing breaker schemes, reducing revision cycles and installation risk.

Who should consider this breaker

• Maintenance teams managing commercial, industrial, or data center electrical distributions
• Panel builders designing or refurbishing protection schemes that require a shunt trip
• Inventory managers seeking reliable, readily identifiable spare parts

If you’re unsure about fit, AmpState offers assistance to confirm compatibility and match the WLST120 to your panelboard, load center, or distribution setup. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.