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Siemens NGG2B090L Molded Case Circuit Breaker
- 90A
- 2 Pole
- Unit Mount
Siemens
NGG2B090L
Molded Case Circuit Breaker
Brand
Siemens
SKU
NGG2B090L
Quantity
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Siemens NGG2B090L - 90A 2 Pole Molded Case Circuit Breaker
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Description
Designed for commercial and industrial power systems, the NGG2B090L is a heavy-duty 90A molded case circuit breaker. Operating at up to 480VAC with a 25 kAIC rating, this 2-pole SENTRON breaker ensures reliable thermal-magnetic protection against overloads and short circuits. It features a versatile unit mount design compatible with Siemens P1, P2, and P3 panelboards, as well as DIN rail enclosures. Factory-installed lugs simplify wiring. This legacy model is replaced by the 3VA5190-4EC21-0AA0.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NGG2B090L |
| Series | NGG |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 120VAC, 240VAC, 480VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 120VAC, 65kA @ 240VAC, 25kA @ 480VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | NGG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards, Enclosures, Motor Control Centers |
| Wire Gauge | 8-1/0 AWG (Cu), 8-2/0 AWG (Al) |
| Max Wire | 1/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 8 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, Undervoltage Release |
|---|---|
| Accessories | Line & Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, HACR, NOM, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the NGG2B090L breaker?
This NGG-frame breaker is designed for use in Siemens P1, P2, and P3 panelboards, as well as compatible switchboards, enclosures, and motor control centers.
What are the acceptable wire sizes for the lugs on this 90A breaker?
The factory-installed lugs accept 8 to 1/0 AWG copper wire or 8 to 2/0 AWG aluminum wire. Ensure proper torque specifications are followed during installation.
How is the NGG2B090L physically mounted in an enclosure?
This is a unit mount, feed-thru circuit breaker. It can be secured using standard screw mounting or attached directly to a standard DIN rail.
Can the NGG2B090L be used in DC voltage applications?
Yes, this thermal-magnetic breaker is rated for DC systems up to 125/250VDC, providing an interrupting capacity of 14kAIC at that voltage.
What safety precautions are required before installing the NGG2B090L?
Always de-energize the panelboard or switchboard before installation. Verify the system voltage and available fault current do not exceed the breaker maximum ratings, such as 25kAIC at 480VAC or 14kAIC at 600Y/347VAC.
What breaker frame family does the NGG2B090L belong to?
It is part of the Siemens SENTRON family, specifically falling under the GB/GG frame classification.
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