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Siemens NMX3B800L Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Siemens
NMX3B800L
Molded Case Circuit Breaker
Brand
Siemens
SKU
NMX3B800L
Quantity
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Siemens NMX3B800L - 800A 3 Pole Molded Case Circuit Breaker
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Description
Rated at 35kAIC for 480V systems, the Siemens NMX3B800L is a 3-pole, 800A unit mount molded case circuit breaker. Designed for industrial distribution, it provides reliable overcurrent protection. This Sentron MD Frame breaker installs into Siemens VL Series enclosures, P4/P5 panelboards, and switchboards. It includes line and load lugs for 1/0 AWG to 500 kcmil wire. For modern upgrades, it is replaced by the 3VA6580-5HL36-0AA0. It features a non-interchangeable thermal-magnetic LI trip unit.Specifications
| Brand | Siemens |
|---|---|
| Series | NMX |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | NMG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens VL Series Enclosures, P4/P5 Panelboards, Switchboards |
| Wire Gauge | 1/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 1/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Line and Load Lugs (3TA3MG500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, N-Class Interrupting |
Product FAQs
6 answersWhat enclosures and panelboards is the NMX3B800L compatible with?
This breaker is designed for use with Siemens VL Series enclosures, P4/P5 panelboards, and switchboards.
Does the NMX3B800L come with line and load lugs?
Yes, this unit mount breaker includes factory-installed line and load lugs that accept 1/0 AWG to 500 kcmil aluminum or copper wire.
Is there a modern replacement for the NMX3B800L?
Yes, for modern upgrades, the NMX3B800L is replaced by the Siemens 3VA6580-5HL36-0AA0 molded case circuit breaker.
How does the trip unit operate on the NMX3B800L?
It utilizes a thermal-magnetic LI (Long-Time and Instantaneous) trip unit. The thermal protection is fixed, while the magnetic instantaneous trip is adjustable to fine-tune short-circuit protection.
Are the trip units interchangeable on this breaker?
No, the NMX3B800L is constructed with a non-interchangeable thermal-magnetic trip unit.
What is the catalog number for the replacement lugs?
If you need to replace the factory lugs, the correct 3-piece aluminum line and load lug kit is catalog number 3TA3MG500.
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