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Siemens LGB2B090B Molded Case Circuit Breaker
- 90A
- 2 Pole
- Bolt-On
Siemens
LGB2B090B
Molded Case Circuit Breaker
Brand
Siemens
SKU
LGB2B090B
Quantity
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Siemens LGB2B090B - 90A 2 Pole Molded Case Circuit Breaker
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Description
Providing reliable commercial distribution, the Siemens LGB2B090B is a 90A, 2-pole molded case circuit breaker. It features a thermal-magnetic trip unit with long-time and instantaneous functions to safeguard circuits. This low-tab breaker mounts into Siemens P1, P2, and P3 panelboards via a secure bolt-on connection. For facility upgrades, this model is superseded by the 3VA5190-6ED21-0AA0. With a high interrupting capacity of 65kA at 480Y/277VAC, it is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LGB2B090B |
| Series | LGB |
| Amperage | 90A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | LGB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 8-1/0 AWG (Cu), 8-2/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| 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 |
|---|---|
| Accessories | Load Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Low Tab, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
5 answersWhich Siemens panelboards are compatible with the LGB2B090B circuit breaker?
This bolt-on breaker is designed specifically for installation in Siemens P1, P2, and P3 panelboards.
What wire sizes are accepted by the load side lugs on this breaker?
The load lugs accept 8 to 1/0 AWG copper wire or 8 to 2/0 AWG aluminum wire. Always verify local codes and apply the manufacturer recommended torque during installation.
Can the LGB2B090B be utilized in direct current applications?
Yes, this breaker is rated for DC systems. It provides a 14kA interrupting capacity when used at 125 or 250VDC.
What is the interrupting capacity of this breaker on a 480Y/277V AC system?
When installed in a 480Y/277V AC system, this breaker provides an interrupting rating of 65kA. For lower voltage 240V AC systems, it offers a 100kA rating.
Are the thermal and magnetic trip settings adjustable on the LGB2B090B?
No, this breaker features a fixed thermal and fixed magnetic trip unit for long-time and instantaneous protection. The trip settings cannot be adjusted in the field.
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