Siemens BG3B015 Molded Case Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Siemens
BG3B015
Molded Case Circuit Breaker
Brand
Siemens
SKU
BG3B015
Quantity
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Siemens BG3B015 - 15A 3 Pole Molded Case Circuit Breaker
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Description
The BG3B015 is a 15A, 3-pole bolt-on MCCB from Siemens, designed for commercial applications. It features a specialized switching neutral configuration, ensuring the neutral conductor is disconnected simultaneously with the ungrounded phases during a trip. Built on the BQ frame footprint, this unit installs into compatible Siemens panelboards. It requires three spaces and is replaced by the BQ3B015 model. Rated for 10kAIC at 120/240VAC, it utilizes reliable thermal-magnetic trip technology.Specifications
| Brand | Siemens |
|---|---|
| Series | BG |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | BQ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Panelboards |
| Wire Gauge | 14-6 AWG (Cu/Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Switching Neutral, HACR Rated, Common Trip |
Product FAQs
5 answersWhich panelboards accept the Siemens BG3B015 circuit breaker?
The BG3B015 is a bolt-on breaker designed for integration into Siemens panelboards and switchboards. You must verify your specific panelboard labeling to confirm it accepts BG Series or BQ frame breakers before installation.
What are the wire gauge requirements for the BG3B015 terminals?
The load side lugs accept conductor sizes ranging from 14 AWG to 6 AWG. The terminals are rated for use with either copper or aluminum wiring.
How does the thermal-magnetic trip unit on the BG3B015 function?
The fixed thermal-magnetic mechanism provides dual protection. The thermal component offers long-time protection against sustained overloads, while the magnetic component provides instantaneous tripping to clear short circuits.
Can the Siemens BG3B015 replace an older ITE BG3B015?
Yes. Siemens acquired ITE, and the current Siemens BG3B015 serves as the direct, exact-fit replacement for the legacy ITE BG3B015. They share identical form factors and electrical ratings.
What precautions are required when installing the BG3B015?
Installation must be performed by a qualified electrician following the National Electrical Code (NEC). The panelboard must be fully de-energized before bolting the breaker to the bus to prevent arc flash and shock hazards. Improper breaker-to-bus fit can create severe fire risks.
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