Siemens NGB3K015B Molded Case Circuit Breaker
- 15A
- 3 Pole
- Bolt-On
Siemens
NGB3K015B
Molded Case Circuit Breaker
Brand
Siemens
SKU
NGB3K015B
Quantity
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Siemens NGB3K015B - 15A 3 Pole Molded Case Circuit Breaker
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Description
A reliable solution for commercial power systems, the Siemens NGB3K015B delivers 15 amps of overcurrent protection across three poles. It mounts securely into Siemens P1, P2, and P3 panelboards, providing essential branch circuit defense. Equipped with fixed thermal and magnetic trip elements, it ensures accurate long-time and instantaneous response to faults. The unit is rated for 25 kAIC at 480Y/277V and accommodates 14-10 AWG wire. It serves as a drop-in substitute for the NGB3B015B.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 | NGB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 14-10 AWG (Cu/Al) |
| Max Wire | 10 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, Padlock Attachment |
|---|---|
| Accessories | Load Lugs |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
8 answersWhich Siemens panelboards are compatible with the NGB3K015B?
This breaker is designed for use in Siemens P1, P2, and P3 panelboards. It requires 3 inches of branch unit space and mounts directly to the panel bus.
How is the NGB3K015B installed in the panelboard?
It features a bolt-on connection. The line side bolts directly to the panelboard bus, while the load side uses standard mechanical lugs for wire termination.
What wire sizes are accepted by the load lugs on this breaker?
The factory-installed load lugs accept copper or aluminum conductors ranging from 14 AWG to 10 AWG.
Is the NGB3K015B suitable for direct current (DC) systems?
Yes, this thermal-magnetic breaker is rated for DC applications up to 125/250VDC, providing an interrupting rating of 14kA.
Can the trip settings on the NGB3K015B be adjusted?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous trip functions are factory calibrated and cannot be modified in the field.
How does the NGB series compare to the Siemens BQD series?
Both NGB and BQD breakers fit the same Siemens P1, P2, and P3 panelboards and occupy the same physical footprint. However, the NGB series provides a higher interrupting rating (25kA at 480V) compared to the standard BQD series.
Does this breaker feature a trip-free mechanism?
Yes, it utilizes a trip-free overcenter toggle mechanism. This safety feature ensures the internal contacts will open during a fault condition, even if the operating handle is physically held in the ON position.
Where can I find the torque specifications for the load lugs?
The required torque values are printed directly on the front label of the circuit breaker. Always apply the exact specified torque to prevent loose connections and ensure safe operation.
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Reviews
Review summary
Customers rate this product 4.5 out of 5 based on 8 reviews.
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Rating
8 reviews
- JHJohn H.Verified BuyerReviewingSiemens NGB3B015B - 15A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/16/26480v breakers
The breakers work great
- BPBland P.Verified BuyerReviewingSiemens NGB3B100 - 100A 3 Pole Molded Case Circuit BreakerI do not recommend this productRated 1 out of 5 stars7/22/26NO LUGS!!
I ordered this breaker and it arrived with no lugs. It was advertised as new so we didn't open the box and check until the shutdown we needed it for. When we discovered the lugs were missing we sent an email requesting a set overnighted. We didn't get a response for a couple of days, at which point we had already ordered lugs from their competitor Simply Breakers. They asked for pictures and questioned weather we had ordered the correct breaker asking if we needed lugs on both sides. This is a panel breaker and their is only one configuration that I am aware of which is bolted to bus in panel and wires to the three lugs on the other side. I have never had to order lugs separately for this style of breaker. They asked for pictures of box and what was in it, of course at this point the breaker is already installed and the box is thrown away. I sent a receipt for the overnight lugs from Simply breakers and asked for whatever credit they could provide. I received crickets to date. I have never had a problem with an order in the past from super breakers, but they are to busy to even respond to my request so I will think twice before I order anything from them again. It will be my last option once all others have been exhausted. Use Simply Breakers they have better stock and service.
- PFPaul F.Verified BuyerReviewingSiemens NGB3B060B - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/24/26Great service, quick shippin
Need I say more.I have used SB. When we need it and need it quickly Always have what I need.
- BPBJ P.Verified BuyerReviewingSiemens NGB3B020B - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/11/26NGB3B020B
I recently purchased the NGB3B020B and I’m very satisfied with the quality and performance. The breaker feels solid and well-made, and installation was straightforward. It works exactly as expected and provides reliable protection for my electrical setup. Shipping was fast and the product arrived in excellent condition. I would definitely purchase from this seller again.
- RSRadovan S.Verified BuyerReviewingSiemens NGB3B050B - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/9/26Absolutely amazing service.
On Time