Siemens NEG3B025L Molded Case Circuit Breaker
- 25A
- 3 Pole
- Unit Mount
Quantity
Siemens NEG3B025L - 25A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for industrial power distribution, the Siemens NEG3B025L is a 3-pole, 25A MCCB from the Sentron VL family providing robust LI protection. This unit mount breaker installs into Siemens VL Series enclosures and panelboards. It includes line and load lugs and is officially replaced by the 3VA5125-5ED31-0AA0 model. Rated 85kAIC at 240V and 35kAIC at 480V, the EG frame breaker features a fixed thermal and adjustable magnetic trip mechanism.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NEG3B025L |
| Series | NEG |
| Amperage | 25A |
| 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 | NEG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens VL Series Enclosures, Panelboards, Switchboards |
| Wire Gauge | 8 AWG - 1/0 AWG (Cu), 8 AWG - 2/0 AWG (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 |
|---|---|
| Accessories | Line and Load Side Lugs 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, Current Limiting, Reverse Feed |
Product FAQs
6 answersWhat are the acceptable wire sizes and materials for the NEG3B025L lugs?
The factory-installed lugs accept 8 AWG to 1/0 AWG copper (Cu) wire, or 8 AWG to 2/0 AWG aluminum (Al) wire. Always apply the manufacturer-specified torque listed on the breaker faceplate during installation.
Which enclosures and panels are compatible with the NEG3B025L breaker?
This unit-mount breaker is designed for integration into Siemens VL Series enclosures, as well as compatible Siemens panelboards and switchboards configured for NEG frame devices.
How is the trip unit configured on the NEG3B025L?
It features a thermal-magnetic trip unit with fixed thermal protection for long-time (L) overload conditions and an adjustable magnetic dial for instantaneous (I) short-circuit protection.
Can the NEG3B025L be used in DC applications?
Yes, this breaker is rated for DC systems up to 500VDC, providing an interrupting capacity of 30kA at that voltage.
Does this breaker plug into a busbar or require bolt-on connections?
The NEG3B025L is a unit-mount, feed-thru circuit breaker. It does not plug into a panelboard bus. It requires hardwired cable connections at both the line and load terminals.
What safety precautions should be taken before adjusting the magnetic trip settings?
Always de-energize the breaker and follow standard lockout/tagout procedures before adjusting the instantaneous magnetic trip dial. Verify the circuit is dead using a properly rated voltage meter.
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