Siemens NEG3B030 Molded Case Circuit Breaker
- 30A
- 3 Pole
- Unit Mount
Quantity
Siemens NEG3B030 - 30A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for commercial applications, the Siemens NEG3B030 is a 3-pole, 30A MCCB from the VL Series delivering reliable thermal-magnetic protection. This unit mount breaker integrates into Siemens VL Series enclosures and switchboards. Lugs are not included with this model, which is replaced by the 3VA5130-5ED31-0AA0. Featuring a fixed thermal and magnetic trip, the EG frame breaker offers an 85kAIC rating at 240VAC. It is HACR rated and current limiting.Specifications
| Brand | Siemens |
|---|---|
| Series | NEG |
| Amperage | 30A |
| 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 VL Series Enclosures, Panelboards, Switchboards |
| 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, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| 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, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
7 answersWhat is the direct replacement for the NEG3B030?
The NEG3B030 is a legacy VL Series breaker that has been officially replaced by the Siemens 3VA5130-5ED31-0AA0. Upgrading to the newer 3VA series may require a mounting retrofit kit depending on your existing panelboard or switchboard configuration.
What is the difference between the NEG3B030 and the HEG3B030?
Both are 30A, 3-pole EG-frame breakers in the Siemens VL family, but they feature different interrupting capacities. The NEG3B030 provides a standard 35kAIC rating at 480VAC, while the HEG3B030 offers a higher 65kAIC rating at 480VAC for systems requiring greater fault current protection.
What enclosures and panels accept the NEG3B030?
This unit-mount, bolt-on breaker is specifically engineered for Siemens VL Series panelboards, switchboards, and standalone VL enclosures. It is not compatible with standard residential load centers or DIN rail systems without specialized mounting hardware.
Can the NEG3B030 be used in DC power systems?
Yes, this thermal-magnetic breaker is rated for both AC and DC applications. It carries a 30kA interrupting rating at up to 500VDC, making it suitable for industrial DC control circuits and specific solar installations.
Does this breaker allow for adjustable trip settings?
No, the NEG3B030 features a fixed thermal and fixed magnetic trip unit providing basic Long-Time and Instantaneous (LI) protection. If your application requires adjustable trip curves, you must select a breaker equipped with an electronic trip unit (ETU).
Is the NEG3B030 suitable for HVAC applications?
Yes, this EG-frame breaker is HACR rated. It is tested and approved for use with heating, air conditioning, and refrigeration equipment, provided the equipment specifications align with a 30A, 3-pole breaker.
Can the NEG3B030 be reverse fed?
Yes, as a standard thermal-magnetic molded case circuit breaker, the NEG3B030 supports reverse feeding. Power can be supplied to either the top or bottom terminals, though you must always verify local electrical codes and specific panelboard restrictions prior to installation.
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