Siemens LGB3K100B Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Quantity
Siemens LGB3K100B - 100A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
A dependable solution for commercial facilities, this 100-amp, 3-pole molded case circuit breaker provides thermal-magnetic protection with a 65kAIC rating at 480Y/277V. It installs into Siemens P1, P2, and P3 panelboards via a sturdy bolt-on connection. This specific model is replaced by the newer 3VA5110-6ED31-0AA0 for future upgrades. The breaker features a trip-free mechanism, reverse feed capability, and is HACR rated for use with heating and cooling equipment.Specifications
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| 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 | 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 |
|---|---|
| Accessories | Load Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Low Tab, Reverse Feed, Trip-Free Mechanism, Non-Interchangeable Trip |
Product FAQs
4 answersCan I install the LGB3K100B in a standard Siemens residential load center?
No. The LGB3K100B is a bolt-on molded case circuit breaker designed specifically for Siemens P1, P2, and P3 commercial panelboards. It is not compatible with standard plug-on residential load centers.
Is the LGB3K100B suitable for direct current (DC) applications?
Yes. In addition to its AC ratings, this breaker is rated for use on DC systems up to 125/250VDC with an interrupting capacity of 14kA.
What is the difference between the Siemens LGB3K100B and the NGB3K100B or HGB3K100B?
They share the same physical GB frame and panelboard compatibility, but differ in their interrupting ratings. The LGB series offers the highest interrupting capacity (65kA at 480V and 100kA at 240V) compared to the standard NGB or HGB versions.
Does the LGB3K100B have adjustable trip settings?
No. The LGB3K100B features a fixed thermal and fixed magnetic trip unit. It cannot be adjusted in the field.
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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.