Siemens SMD6B800LIG Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
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Siemens SMD6B800LIG - 800A 3 Pole Molded Case Circuit Breaker
New
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Description
The SMD6B800LIG is a 3-pole, 800A molded case circuit breaker from the Siemens Sentron family. It is designed for robust commercial and industrial applications. This unit-mount MCCB installs into Siemens P4, P5, S4, S5, and SPP panelboards, as well as SB switchboards. It serves as a substitute for the SMD6A800LIG. Rated at 50 kAIC at 480VAC, it features a Sensitrip IV electronic trip unit with adjustable long-time, instantaneous, and ground-fault (LIG) functions for precise coordination.Specifications
| Brand | Siemens |
|---|---|
| Series | SMD6 |
| Amperage | 800A |
| 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 P4, P5, S4, S5, SPP Panelboards, SB Switchboards, Motor Control Centers |
| 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, Padlock Attachment |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism, Adjustable Trip, Ground Fault Protection |
Product FAQs
6 answersWhich Siemens enclosures and panels accept the SMD6B800LIG breaker?
This Sentron MD-frame breaker is designed for unit-mount installation in Siemens P4, P5, S4, S5, and SPP panelboards, as well as SB switchboards and motor control centers. It requires the appropriate mounting hardware kit for your specific enclosure type.
What does the LIG designation mean on this Sensitrip electronic trip unit?
The LIG code indicates the breaker provides Long-Time, Instantaneous, and Ground-Fault trip functions. It does not include a Short-Time delay function, which is an important distinction if your coordination study requires an LSIG breaker.
Is the SMD6B800LIG suitable for applications requiring equipment ground-fault protection?
Yes, the integrated Sensitrip electronic trip unit includes adjustable ground-fault protection, making it suitable for installations where the National Electrical Code requires equipment ground-fault protection on large feeder circuits.
Can I use the SMD6B800LIG to replace an older Siemens MD-frame breaker?
Yes, the SMD6B800LIG shares the standard Sentron MD-frame dimensions and mounting footprint, making it a direct physical replacement for older or failed 800A MD-frame breakers with matching trip requirements.
How is the SMD6B800LIG mounted in a panel?
This is a unit-mount, bolt-on circuit breaker. It secures directly to the chassis or mounting pan of compatible Siemens distribution equipment using bolts, rather than plugging onto busbars.
Which trip settings can be adjusted on the SMD6B800LIG?
The solid-state Sensitrip electronic trip unit features adjustable dials for the continuous current (Long-Time), instantaneous pickup, and ground-fault settings, allowing you to precisely coordinate the breaker with your specific system requirements.
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