Part of the BL series, the Siemens B33000S01 is a 3-pole, 30A miniature circuit breaker built for commercial electrical distribution. It features a factory-installed 120VAC shunt trip, allowing for remote tripping in safety-critical applications. This unit mounts into Siemens P1 through P5 panelboards using a secure bolt-on connection. It accepts 10-8 AWG copper or 10-6 AWG aluminum wiring. Rated for 10kAIC at 240VAC, it provides dependable thermal-magnetic protection and is HACR rated.
Which panelboards are compatible with the B33000S01 breaker?
This bolt-on breaker is designed for Siemens P-series commercial panelboards, including P1, P2, P3, P4, and P5 models. It is not compatible with standard residential plug-on load centers.
How does the integrated 120VAC shunt trip operate?
The factory-installed shunt trip requires a separate 120V control circuit. When voltage is applied to the coil leads, it mechanically trips the breaker to open the contacts. This allows for remote power disconnection during emergencies or automated shutdowns.
Does the shunt trip accessory affect the physical footprint of the breaker?
Yes. On Siemens BL series breakers, a factory-installed shunt trip typically requires one additional inch of panel space, which is equivalent to an extra pole position in the panelboard.
How is this breaker secured to the panelboard bus?
It utilizes a bolt-on mounting configuration, which requires screws to physically attach the breaker to the panelboard bus bars. This provides a highly secure, vibration-resistant connection common in commercial and industrial environments.
What protection does the LI trip function provide?
The LI designation indicates Long-Time and Instantaneous trip functions. The thermal long-time element protects against sustained overloads, while the magnetic instantaneous element clears sudden short circuits.
Can this breaker replace older ITE models?
Yes. Siemens acquired ITE, and this breaker serves as a direct replacement for legacy ITE breakers sharing the B33000S01 catalog number in compatible bolt-on panelboards.
When is a shunt trip breaker typically required by code?
Shunt trips are frequently mandated for safety-critical commercial applications, such as elevator control panels, commercial kitchen exhaust hoods, and fire alarm system integrations that require remote power cutoff.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 35 reviews.
5.0
Rated 5.0 out of 5 stars
Based on 35 reviews
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Reviews Summary
Generated by AI from 66 most recent customer reviews
Last updated 8/15/25
Customers say these circuit breakers meet their specifications and perform as expected. Many reviews highlight the quick delivery times and competitive pricing. Frequent comments address the reliable product quality and ease of installation. The ordering process receives praise for its simplicity, with users noting consistent product availability.