Siemens SND6B120LIG Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
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Siemens SND6B120LIG - 1200A 3 Pole Molded Case Circuit Breaker
New
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Description
The SND6B120LIG is a 1200A, 3-pole molded case circuit breaker from the Siemens Sentron family. It is built for commercial and industrial power distribution up to 600VAC. This unit-mount ND-frame breaker installs into Siemens Sentron S4, S5, and SPP panelboards, as well as compatible switchboards. It is reverse-feed capable and HACR rated. Equipped with a Sensitrip IV electronic trip unit, it offers adjustable long-time, instantaneous, and ground-fault (LIG) protection for precise coordination.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 S4, S5, SPP), Switchboards |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-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 | HACR Rated, Reverse Feed |
Product FAQs
7 answersWhich panelboards are compatible with the SND6B120LIG circuit breaker?
This ND frame breaker is designed for installation in Siemens Sentron Type S4, S5, and SPP panelboards, as well as compatible Siemens switchboards.
What does the LIG designation mean on the Sensitrip IV trip unit?
The LIG designation indicates the solid state trip unit provides adjustable Long-Time, Instantaneous, and Ground Fault protection functions. This allows for precise coordination and equipment protection in commercial and industrial power distribution systems.
Which lug kits are compatible with this 1200A ND frame circuit breaker?
For wire termination, this breaker accepts Siemens ND frame lug kits such as the 3TA4N8500 for 250 to 500 kcmil cables or the 3TA2N8750 for 500 to 750 kcmil copper or aluminum conductors.
Can the SND6B120LIG replace older ND6 frame breakers?
Yes, this Sentron series breaker shares the standard ND frame footprint and can replace older ND6, HND6, or CND6 frame breakers in existing Siemens or ITE panelboards, provided the voltage and interrupting ratings meet your system requirements.
Is this breaker suitable for reverse-feed applications?
Yes, this solid state breaker is suitable for reverse-feed applications, allowing line connections to be made on either the top or bottom terminals.
How does the ground fault protection function on this breaker?
The integrated ground fault function monitors for unbalanced currents between the phase conductors. If a ground fault exceeds the adjustable pickup setting, the electronic trip unit will open the breaker to protect equipment from damage.
Can I add a shunt trip to the SND6B120LIG?
Yes, this breaker supports field-installable internal accessories designed for Siemens MD, ND, PD, and RD frames, such as the S06MN6 shunt trip, which allows for remote tripping capabilities.
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