Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Siemens NGB2B030B Molded Case Circuit Breaker
- 30A
- 2 Pole
- Bolt-On
Siemens
NGB2B030B
Molded Case Circuit Breaker
Brand
Siemens
SKU
NGB2B030B
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens NGB2B030B - 30A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens NGB2B030B - 30A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | NGB2B030B |
| Series | NGB |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| 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 | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Load Side 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 |
Quantity
Siemens NGB2B030B - 30A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | NGB |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| 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 | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Load Side 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 |
Similar Items
25A 2 Pole Molded Case Circuit Breaker
40A 2 Pole Molded Case Circuit Breaker
20A 2 Pole Molded Case Circuit Breaker
Description
Engineered for commercial power distribution, this 30-amp, 2-pole SENTRON MCCB provides reliable thermal-magnetic protection. It is built to handle demanding industrial environments. Designed for bolt-on installation, the NGB2B030B mounts into Siemens P1, P2, and P3 panelboards. It supports legacy GB/GG frame applications and is eventually replaced by the 3VA51 series. Rated 100kAIC at 240V, this breaker is HACR and HID rated, supports reverse feed, and includes load side lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NGB2B030B |
| Series | NGB |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| 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 | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Load Side 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
7 answersWhich panelboards are compatible with the NGB2B030B circuit breaker?
This bolt-on breaker is specifically designed for installation in Siemens P1, P2, and P3 commercial panelboards. It is not compatible with standard residential load centers.
What wire sizes and materials are accepted by the load lugs?
The factory-installed lugs accept 14 to 6 AWG copper (Cu) wire or 12 to 6 AWG aluminum (Al) wire.
Can the NGB2B030B be used in direct current (DC) applications?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for 125/250VDC systems, providing up to 14kAIC of interrupting capacity.
Does this breaker feature adjustable trip settings?
No, the NGB2B030B utilizes a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous (LI) trip thresholds cannot be adjusted in the field.
Is the NGB2B030B a direct replacement for older GB or GG frame breakers?
Yes, the NGB frame is part of the Siemens Sentron family and is designed to support legacy GB and GG frame applications in existing panelboards.
Does this breaker provide ground-fault or arc-fault protection?
No, this is a standard thermal-magnetic breaker designed for overcurrent and short-circuit protection. It does not include GFCI, AFCI, or GFEP safety circuitry.
Is the NGB2B030B suitable for reverse feed applications?
Yes, this thermal-magnetic breaker supports reverse feed wiring configurations, allowing it to be back-fed in commercial power distribution setups.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.