Siemens NEG3B050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Unit Mount
Quantity
Siemens NEG3B050 - 50A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built to handle demanding electrical loads, the Siemens NEG3B050 is a 3-pole, 50A MCCB from the Sentron VL family. It provides reliable long-time and instantaneous (LI) thermal-magnetic protection. This unit mount breaker is compatible with Siemens P4 and P5 panelboards or switchboards. Unlike the "L" suffix models, this version does not include lugs. It is replaced by the 3VA5150-5EC31-0AA0. It boasts a 35kAIC rating at 480VAC and a 30kA rating at 500VDC, offering global ratings.Specifications
| Brand | Siemens |
|---|---|
| Series | NEG |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600Y/347VAC, 30kA @ 500VDC |
| Frame Type | EG |
|---|---|
| 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 | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, 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 NEG3B050 breaker?
This EG frame breaker is designed for use in Siemens P4 and P5 panelboards, as well as Siemens switchboards and VL series enclosures. It features a bolt-on connection and is not compatible with standard plug-on load centers.
What wire sizes are accepted by the standard lugs on the NEG3B050?
The factory lugs accept wire gauges from 8 AWG up to 1/0 AWG. The terminals are rated for use with both copper (Cu) and aluminum (Al) conductors.
Does the NEG3B050 feature adjustable trip settings?
Yes, this breaker utilizes a thermal magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
Can the NEG3B050 be installed in direct current (DC) systems?
Yes, this breaker is rated for DC applications up to 500V DC, providing a 30kA interrupting rating at that voltage.
What frame class does the NEG3B050 belong to?
It is an EG frame circuit breaker, which is part of the Siemens SENTRON VL family of molded case circuit breakers.
How is the NEG3B050 mounted inside an enclosure?
This is a unit mount, bolt-on circuit breaker. It secures directly to the panelboard bus or mounting plate using bolted connections, ensuring a rigid and high-capacity electrical joint.
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