Siemens G3B015 Molded Case Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Siemens
G3B015
Molded Case Circuit Breaker
Brand
Siemens
SKU
G3B015
Quantity
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Siemens G3B015 - 15A 3 Pole Molded Case Circuit Breaker
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Description
Designed for robust facility power management, this 15A three-phase breaker features a trip-free mechanism for enhanced operational safety. The unit bolts firmly into Siemens P1, P2, and P3 panelboards to ensure stable connections in high-vibration commercial settings. Carrying both HACR and HID ratings, it accommodates demanding HVAC and lighting loads with a 65kA interrupt rating at 240V. This legacy GB frame configuration is officially superseded by the NGB3B015 series.Specifications
| Brand | Siemens |
|---|---|
| Series | GB |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480Y/277VAC, 25kA @ 480VAC, 14kA @ 600Y/347VAC, 14kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1, IEC 60947-2 |
| Approval | CSA, HACR, HID, SWD, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
8 answersWhich Siemens panelboards are compatible with the G3B015 breaker?
This bolt-on molded case circuit breaker is designed specifically for use in Siemens P1, P2, and P3 series commercial panelboards.
Is there a difference between the ITE G3B015 and the Siemens G3B015?
No. Siemens acquired ITE and continues to manufacture this breaker under the Siemens brand. The G3B015 catalog number remains identical and serves as a direct, UL-listed replacement for older ITE-branded units.
Can the G3B015 be used in DC voltage systems?
Yes, this breaker is rated for DC applications up to 250VDC, providing an interrupting capacity of 14kA at that voltage.
What does the 600Y/347V AC rating mean for this breaker?
The slash rating indicates the G3B015 is suitable for use on solidly grounded wye systems up to 600V line-to-line (347V line-to-neutral). It is not rated for use on 600V ungrounded delta systems.
Are the factory lugs on the G3B015 rated for both copper and aluminum conductors?
Yes, the factory-installed lugs are dual-rated. They accept 14 to 6 AWG copper (Cu) conductors and 12 to 6 AWG aluminum (Al) conductors.
How does the G3B015 mount into the panelboard?
This is a bolt-on breaker that fastens directly to the panelboard bus bars using mounting screws, ensuring a secure, high-vibration resistant connection for commercial and industrial applications.
Can this breaker be installed in standard residential load centers?
No, the G3B015 is a bolt-on molded case circuit breaker designed for commercial panelboards. It will not fit in standard residential plug-on or bolt-on load centers.
Does this breaker feature adjustable trip settings?
No, the G3B015 utilizes a fixed thermal magnetic trip unit. Both the long-time overload and instantaneous short-circuit trip functions are factory set and cannot be adjusted in the field.
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