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Siemens NGB3B015 Molded Case Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Siemens
NGB3B015
Molded Case Circuit Breaker
Brand
Siemens
SKU
NGB3B015
Quantity
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Siemens NGB3B015 - 15A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial distribution, the Siemens NGB3B015 is a 3-pole, 15A molded case circuit breaker. It delivers thermal-magnetic protection for branch circuits requiring up to 25kAIC at 480Y/277V. This bolt-on MCCB mounts into Siemens P1, P2, and P3 panelboards. It replaces older GB/GG frames and can be substituted by the 3VA51 series using a mounting kit. Configured without load lugs, this model uses a nut keeper connection. It is HACR and HID rated, and supports reverse feed.Specifications
| Brand | Siemens |
|---|---|
| Series | NGB |
| Amperage | 15A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 25kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | GG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 16-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 16 AWG (Cu), 12 AWG (Al) |
| 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, Padlock Attachment, Load Side Lugs |
|---|---|
| Accessories | Nut Keeper (No Lugs) |
| Standards | CSA C22.2 No. 5, UL 489, NEMA AB 1 |
| Approval | CSA, HACR, HID, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
6 answersWhich Siemens panelboards accept the NGB3B015 breaker?
This bolt-on breaker is designed specifically for installation in Siemens P1, P2, and P3 lighting and distribution panelboards.
What are the acceptable wire gauges for the terminals on this breaker?
The standard lugs accommodate 16 to 6 AWG copper conductors or 12 to 6 AWG aluminum conductors. Ensure proper torque specifications are followed during installation.
Is the NGB3B015 suitable for direct current (DC) systems?
Yes, it carries a DC rating of 125/250VDC with a 14kA interrupting capacity, making it suitable for specific industrial DC control and distribution applications.
Can I adjust the trip settings on the NGB3B015?
No, this breaker features a fixed thermal magnetic trip unit. Both the long time overload and instantaneous short circuit trip points are factory set and non-adjustable.
What frame class does the NGB3B015 belong to?
It is part of the Siemens SENTRON family and utilizes the GG frame design. It shares physical dimensions and mounting characteristics with other breakers in the GB and GG frame groups.
Does this breaker include integrated ground fault equipment protection?
No, the NGB3B015 provides standard thermal magnetic protection against overloads and short circuits. It does not feature integrated ground fault or arc fault circuitry.
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