Overview
The Siemens BQ1B030 is a molded case circuit breaker designed for reliable overload and short-circuit protection in commercial and industrial electrical distribution systems. This 1-pole, 30A unit operates at 120V with a 10kA interrupting capacity (10kAIC) and features thermal-magnetic trip technology for dependable protection. The bolt-on connection design integrates seamlessly into Siemens P1, P2, and P3 panelboards.
Key Features
- Thermal-Magnetic Trip Protection: Reliable overload and short-circuit detection
- Bolt-On Mounting: Secure, non-interchangeable connection to compatible Siemens panels
- Lug Terminals: Accepts 14–6 AWG copper or 12–6 AWG aluminum conductors
- 10kA Interrupting Rating: Suitable for standard commercial distribution applications
- HACR Rated: Approved for use in air-conditioned and refrigeration circuits
- Manual On/Off Control: Knob-style actuator for easy operation and status indication
Technical Specifications
- Poles: 1
- Amperage: 30A
- Voltage: 120V
- Interrupting Capacity: 10kA @ 120V
- Trip Type: Thermal-Magnetic
- Mounting Style: Bolt-On
- Wire Range: 14–6 AWG (copper), 12–6 AWG (aluminum)
- Breaker Type: Molded Case, Non-Interchangeable Trip
- Supply: Load-side lugs included
Typical Applications
The BQ1B030 is commonly used in:
- Commercial electrical distribution panels
- Light industrial control circuits
- HVAC and refrigeration equipment circuits (HACR rated)
- General-purpose feeder and branch circuits rated 30A
- Panelboard upgrades and replacements requiring bolt-on breakers
Compatibility & Replacements
Compatible With
- Siemens P1 panelboards
- Siemens P2 panelboards
- Siemens P3 panelboards
- Standard 120V electrical distribution systems
Replaces / Drop-In Replacement For
- Siemens BAB1030 (legacy equivalent)
- Siemens/ITE THQB1130 (functional replacement)
Works With
- Bolt-on compatible Siemens low-voltage panelboards
- Standard copper and aluminum wire (per amperage limits)
- Thermal-magnetic trip systems common to molded case breakers
