Best Single Pole Shunt Trip Breakers for Quick External Tripping
When selecting a single pole shunt trip breaker, it’s essential to consider UL listings, external tripping capabilities, voltage rating, and mounting style. The following five products represent reliable options for residential and light commercial electrical panels that require external actuation or rapid shutdown features. Each entry includes a concise feature snapshot to help compare compatibility with standard 120-volt circuits.
| Product | Brand | Voltage | Current | Key Feature |
|---|---|---|---|---|
| Siemens Q12000S01 | SIEMENS | 120 V | 20 A | UL Listed, external shunt trip, single pole |
| THQB1120ST1-20 | Generic | 120 V | 20 A | Shunt trip, bolt-on, 1 Pole |
| Siemens Q13000S01 | SIEMENS | 120 V | 30 A | UL Listed, external shunt trip, single pole |
| Siemens Q11500S01 | SIEMENS | 120 V | 15 A | UL Listed, external shunt trip, single pole |
| Shunt Trip Circuit Breaker 1P 20 Amp | SIEMENS | 120/240 V | 20 A | Shunt trip, single pole, 120/240 V |
Siemens Q12000S01 120-Volt MP-T 20-Amp, Single Pole
The Siemens Q12000S01 is a 120-volt, single-pole circuit breaker crafted for panels that require an external shunt trip. It is UL Listed and designed to take up the space of two poles, balancing compact installation with robust external-trip capability. Ideal for safety-critical applications where a remote signal or emergency shutdown is necessary, this unit provides reliable interruption without replacing existing panel infrastructure.
THQB1120ST1-20 Amp Shunt Trip, 1 Pole, 120V
The THQB1120ST1 is a 20-amp shunt trip circuit breaker designed for bolt-on installation. It supports 1-pole operation at 120 volts, enabling fast external activation for safety-interlock or emergency shutdown scenarios. Typical uses include control panels and equipment rooms where an external signal is wired to promptly interrupt power.
Siemens Q13000S01 30-Amp, 120-Volt, Single Pole
The Siemens Q13000S01 provides a higher current rating while maintaining single-pole operation at 120 volts. It includes a 120-volt shunt trip and UL listing, ensuring compatibility with protective device requirements in both residential and light commercial settings. Its compact MP-T design helps fit into standard panel spaces that emulate two-pole footprints while delivering external tripping when required.
Siemens Q11500S01 15-Amp Shunt Trip, 1P
The Siemens Q11500S01 is a 15-amp, single-pole circuit breaker with an integrated shunt trip mechanism. It is UL Listed and designed to interrupt power on external signaling. Suitable for circuits requiring precise control of shutdown signals, this unit provides a compact option for safety-compliant systems in homes and small facilities.
Shunt Trip Circuit Breaker 1P 20 Amp
This 1-pole, 20-amp shunt trip breaker is designed for circuits requiring external activation at 120/240 volts. The unit emphasizes straightforward installation and compatibility with conventional Siemens panel configurations, making it suitable for safety-focused upgrades or refurbishments in residential or light commercial settings.
Siemens Q22000S01 20-Amp Shunt Trip, 1P
The Siemens Q22000S01 is a 120/240-volt, 20-amp, single-pole shunt trip breaker designed to accommodate external trip signals while maintaining a compact footprint. This model supports external control schemes and is compatible with MP-T style panels that require a single-pole device with an added safety feature for emergency shutdown scenarios.
Buying Guide: Key Considerations for Single Pole Shunt Trip Breakers
When choosing a single pole shunt trip breaker, buyers should weigh compatibility with their panel, voltage requirements, and the nature of the external trip signal. Consider these factors to ensure a proper match for safety-critical installations:
- Voltage and Ampere Rating: Most single-pole shunt trip breakers operate at 120 volts. Ensure the amp rating matches the circuit being protected to avoid nuisance trips or equipment damage.
- Shunt Trip Mechanism: Verify that the unit’s shunt trip is active via external signals (such as a control circuit, smoke detector interlock, or safety relay). Confirm whether the trip is maintained or momentary, and the triggering source’s compatibility with your system.
- UL Listing and Certification: Prefer UL-listed or equivalent-certified devices to meet safety and code compliance for residential or commercial installations.
- Panel Compatibility: Some models occupy the space of multiple poles (e.g., 2-pole footprint) or require MP-T style panels. Check the panel labeling and fit before purchasing.
- Mounting Type: Bolt-on versus plug-in styles affect installation ease and compatibility with existing panels. Choose based on your panel configuration and service constraints.
- Environmental and Durability Needs: Consider applications in environments with exposure to heat, humidity, or dust. Look for robust enclosures and protective features if necessary.
- Availability of Spare Parts and Replacement Lifecycle: Ensure you can source compatible replacement breakers and trip modules in the future for maintenance and upgrades.
- Monitoring and Integration: If the external trip is part of a larger safety system, assess compatibility with control wiring standards, relays, and building management interfaces.