Siemens NEG3B040L Molded Case Circuit Breaker
- 40A
- 3 Pole
- Unit Mount
Quantity
Siemens NEG3B040L - 40A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for heavy-duty power distribution, the Siemens NEG3B040L is a 3-pole, 40A MCCB. As part of the Sentron VL series, this EG-frame device utilizes thermal-magnetic trip units for precise LI protection. It fits into Siemens P4 and P5 panelboards, VL enclosures, and switchboards. The breaker includes TA1EG10 lugs and is officially replaced by the 3VA5140-5EC31-0AA0. With an 85kAIC rating at 240VAC, this N-Class breaker is HACR rated and supports reverse feeding.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NEG3B040L |
| Series | NEG |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600Y/347VAC |
| Frame Type | NEG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4 Panelboards, Siemens P5 Panelboards, Siemens Switchboards, Siemens VL Enclosures |
| Wire Gauge | 8 AWG - 1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 8 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 Included (TA1EG10) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Interchangeable Trip Unit, Trip-Free Mechanism |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the NEG3B040L circuit breaker?
The NEG3B040L is designed for use in Siemens P4 and P5 panelboards, as well as Siemens switchboards and VL enclosures.
What frame size is the Siemens NEG3B040L?
The NEG3B040L is an EG frame molded case circuit breaker, which falls under the Siemens Sentron VL family of breakers.
What does the L at the end of the NEG3B040L catalog number indicate?
The L suffix indicates that the circuit breaker is supplied with factory-installed line and load lugs.
What wire sizes and materials are accepted by the lugs on the NEG3B040L?
The standard lugs on this breaker accept wire gauges from 8 AWG to 1/0 AWG and are rated for both copper and aluminum conductors.
Are the trip settings on the NEG3B040L adjustable?
This breaker features a thermal-magnetic trip unit with a fixed thermal setting for long-time protection and an adjustable magnetic setting for instantaneous short-circuit protection.
What is the modern replacement for the legacy NEG3B040L circuit breaker?
The NEG3B040L is part of the legacy Sentron VL series and is officially replaced by the newer Siemens 3VA series, specifically catalog number 3VA5140-5EC31-0AA0. Note that mounting modifications may be required when upgrading.
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