Siemens LGB2K020B Molded Case Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
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Siemens LGB2K020B - 20A 2 Pole Molded Case Circuit Breaker
New
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Description
Providing reliable circuit protection, the Siemens LGB2K020B is a 20A molded case breaker with fixed thermal and magnetic trip settings. It serves commercial and industrial environments requiring robust performance. This bolt-on unit fits Siemens P1, P2, and P3 panelboards. When upgrading, it is replaced by the 3VA5120-6ED21-0AA0, which needs a specific mounting strap kit for P1 panels. It features a 65kAIC rating at 480Y/277V, is HACR rated, and accommodates reverse feed setups.Specifications
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 25kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | LGB |
|---|---|
| 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 |
| 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, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Trip-Free Mechanism, Reverse Feed |
Product FAQs
7 answersWhich panelboards are compatible with the Siemens LGB2K020B circuit breaker?
This bolt-on molded case circuit breaker is designed for direct installation into Siemens P1, P2, and P3 panelboards.
What wire sizes and materials are accepted by the lugs on the LGB2K020B?
The factory-installed lugs accept 14 to 6 AWG copper wire or 12 to 6 AWG aluminum wire for branch circuit connections.
Can the LGB2K020B be used in DC voltage applications?
Yes, this thermal magnetic breaker is rated for use in DC systems up to 125/250VDC, providing an interrupting capacity of 14kAIC for direct current applications.
What is the maximum interrupting capacity of this breaker at 480V?
The LGB2K020B provides a 65kAIC interrupting rating at 480VAC, making it suitable for commercial and industrial distribution systems with high available fault currents.
Does the LGB2K020B mount to a standard DIN rail?
No, this breaker features a bolt-on connection type specifically designed for secure, vibration-resistant mounting in compatible Siemens panelboards, rather than DIN rail installations.
What type of trip protection does the LGB2K020B provide?
It utilizes a thermal magnetic trip unit, providing both long-time delay for overload protection and instantaneous trip functions for short-circuit protection.
Are the trip settings on the LGB2K020B adjustable?
No, this breaker features fixed thermal and fixed magnetic trip settings for both long-time and instantaneous protection.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- RSRon S.Verified BuyerReviewingSiemens LGB3B045B - 45A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/27/26Siemens Breaker
The breaker was exactly what I needed, and it came within a couple days. The price was in line of what it should’ve been. This was my third purchase from Super Breakers. I will definitely use them again in the future.