Siemens SND6A120LSIGH Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Quantity
Siemens SND6A120LSIGH - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for demanding industrial applications, this 100% rated 1200A circuit breaker allows continuous current operation without standard derating penalties. It integrates seamlessly into Siemens Type S4, S5, and SPP panelboards or switchboards via a standard unit mount. Equipped with a Sensitrip IV unit, it offers adjustable long-time, short-time, instantaneous, and ground-fault (LSIG) parameters, maximizing safety and system coordination while minimizing nuisance tripping events.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 | SMD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (Type S4, S5, SPP), Switchboards |
| 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 | Neutral CT, Lugs Not Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | 100% Rated, HACR Rated, Reverse Feed, Maintenance Mode |
Product FAQs
6 answersWhich panelboards and switchboards accept the SND6A120LSIGH breaker?
This 1200A Sentron ND-frame breaker is designed for installation in Siemens Sentron Type S4, S5, and SPP panelboards, as well as compatible Siemens switchboards.
What adjustable parameters are available on the LSIG electronic trip unit?
The solid-state LSIG trip unit allows electricians to adjust Long-Time pickup and delay, Short-Time pickup and delay, Instantaneous pickup, and Ground-Fault pickup and delay. These settings enable precise selective coordination with upstream and downstream devices.
Which lug kits are compatible with this 1200A ND-frame breaker?
Depending on your conductor size, common mechanical lug kits for this breaker include the 3TA4P8500, which accepts four 250 to 500 kcmil copper or aluminum wires per phase, or the 3TA2N8750, which accepts two 500 to 750 kcmil wires per phase.
How does the ground-fault protection operate on this breaker?
The integrated ground-fault function monitors for low-level phase-to-ground faults. It features adjustable pickup and time delay settings, allowing panel builders to protect equipment from arcing damage while preventing nuisance tripping from minor, temporary ground currents.
What does the bolt-on connection type require for installation?
As a unit-mount, bolt-on breaker, the SND6A120LSIGH must be mechanically bolted directly to the busbars of the panelboard or switchboard. This ensures a secure, low-resistance connection capable of handling the 1200A continuous current rating.
What accessories are compatible with the SMD frame type?
The SND6A120LSIGH is part of the Siemens Sentron ND Frame group. When sourcing internal or external accessories, such as shunt trips, auxiliary switches, or rotary handle operators, you must select components specifically rated for Siemens 1200A ND-frame or SMD-frame breakers.
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