Siemens SND6B120LSIGH Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Quantity
Siemens SND6B120LSIGH - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for continuous heavy-duty loads, the SND6B120LSIGH is a 100% rated, 1200A, 3-pole molded case circuit breaker. It handles up to 600VAC for demanding applications. This Sentron ND-frame breaker installs into Siemens P4 and P5 panelboards, as well as SB-series switchboards. It is replaced by the 3VA series via retrofit. It features a Sensitrip IV electronic trip unit with adjustable long-time, short-time, instantaneous, and ground-fault (LSIG) settings for superior protection.Specifications
| Brand | Siemens |
|---|---|
| Series | SND6 |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | ND |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (Type P4, P5), Switchboards (SB1, SB2, SB3) |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, 100% Rated |
Product FAQs
5 answersWhich panelboards and switchboards are compatible with the SND6B120LSIGH breaker?
This ND-frame breaker is designed for installation in Siemens Sentron Type P4 and P5 panelboards, as well as SB1, SB2, and SB3 switchboards.
What adjustability does the LSIG trip unit offer on this breaker?
The solid state electronic trip unit provides adjustable settings for Long-Time, Short-Time, Instantaneous, and Ground Fault (LSIG) protection. This allows panel builders and electricians to precisely shape the trip curve for optimal selective coordination with downstream devices.
How is the SND6B120LSIGH mounted in an electrical enclosure?
It is a unit mount, feed-thru circuit breaker. This means it bolts directly to the mounting pan or structure of the enclosure rather than plugging into a busbar, and it utilizes lug terminals for both the line and load wire connections.
Does the SND6B120LSIGH include equipment ground fault protection?
Yes, the G in the LSIG trip function indicates that this breaker features integral ground fault protection. This is essential for protecting electrical equipment from damage caused by low-level arcing ground faults.
Can I use the SND6B120LSIGH to replace an older Siemens ND-frame breaker?
Yes, because it is built on the standard Siemens Sentron ND frame, it shares the same physical footprint and mounting dimensions as other ND-frame breakers. You must verify that the 1200A rating, LSIG trip functions, and AIC ratings meet your specific system requirements before replacing an existing unit.
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