Siemens HEG3B125L Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Quantity
Siemens HEG3B125L - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for industrial environments, the HEG3B125L is a 3-pole, 125A molded case circuit breaker from the Siemens Sentron VL family. It delivers robust thermal-magnetic overcurrent protection. Designed as a unit-mount device, it integrates into Siemens P4 and P5 panelboards. This "L" suffix model includes factory-installed line and load lugs. The breaker provides a high interrupting rating of 65 kAIC at 480VAC. It is officially replaced by the newer 3VA5112-6ED31-0AA0.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HEG3B125L |
| Series | HEG |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 42kA @ 250VDC, 35kA @ 500VDC |
| Frame Type | HEB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards, Enclosures |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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 | Line and Load Lugs Included |
| 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 | HACR Rated, High Interrupting Capacity, Reverse Feed |
Product FAQs
6 answersWhat panelboards accept the Siemens HEG3B125L breaker?
This EG frame breaker is designed for installation in Siemens P4 and P5 panelboards, as well as compatible Siemens switchboards and standalone enclosures.
What wire sizes and materials are supported by the HEG3B125L terminals?
The factory-installed lugs accept 14 AWG to 1/0 AWG copper or aluminum conductors. Ensure proper torque specifications are followed during installation.
Is the HEG3B125L rated for DC voltage applications?
Yes, this thermal-magnetic breaker is rated for DC systems. It provides up to 42kA interrupting capacity at 250V DC and 35kA at 500V DC.
Does this breaker plug into the bus or is it bolt-on?
The HEG3B125L is a unit-mount, feed-thru circuit breaker. It is designed to be bolted directly to the mounting surface or enclosure backpan rather than plugging into a busbar.
What type of trip unit is installed in the HEG3B125L?
It features a non-interchangeable thermal-magnetic trip unit with LI functions. This provides fixed long-time overload protection and fixed instantaneous short-circuit protection.
What breaker frame family does the HEG3B125L belong to?
This unit is part of the Siemens SENTRON VL series and utilizes the EG frame size, specifically designated as the HEB frame type.
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