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Siemens HED42B125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Siemens
HED42B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
HED42B125
Quantity
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Siemens HED42B125 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens HED42B125 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | HED42B125 |
| Series | HED4 |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 42kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | HED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (P1, P2, P3), SB Switchboards |
| Wire Gauge | 3-3/0 AWG (Cu), 1-2/0 AWG (Al) |
| Max Wire | 3/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 3 AWG (Cu), 1 AWG (Al) |
| 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, Alarm Switch, Undervoltage Release, Lug Kits |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, High Interrupting Capacity |
Quantity
Siemens HED42B125 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | HED4 |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 42kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | HED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (P1, P2, P3), SB Switchboards |
| Wire Gauge | 3-3/0 AWG (Cu), 1-2/0 AWG (Al) |
| Max Wire | 3/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 3 AWG (Cu), 1 AWG (Al) |
| 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, Alarm Switch, Undervoltage Release, Lug Kits |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, High Interrupting Capacity |
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Description
Providing essential overcurrent defense, the Siemens HED42B125 is a 2-pole, 125A molded case circuit breaker. This Sentron ED-Frame device utilizes fixed thermal-magnetic trip technology to protect commercial systems from damaging overloads. The bolt-on configuration fastens securely into Siemens Sentron P1, P2, and P3 panelboards. While transitioning to the newer 3VA5112-6EC21-0AA0, it remains a direct fit for existing infrastructure. It boasts a 42kAIC rating at 480V and is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HED42B125 |
| Series | HED4 |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 42kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | HED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (P1, P2, P3), SB Switchboards |
| Wire Gauge | 3-3/0 AWG (Cu), 1-2/0 AWG (Al) |
| Max Wire | 3/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 3 AWG (Cu), 1 AWG (Al) |
| 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, Alarm Switch, Undervoltage Release, Lug Kits |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, High Interrupting Capacity |
Product FAQs
5 answersWhich Siemens panelboards are compatible with the HED42B125 circuit breaker?
This bolt-on breaker is designed for use in Siemens Sentron P1, P2, and P3 panelboards, as well as SB series switchboards.
What wire sizes and materials are supported by the factory lugs on the HED42B125?
The factory-installed lugs accommodate 3 AWG through 3/0 AWG copper conductors, or 1 AWG through 2/0 AWG aluminum conductors. Ensure proper torque specifications are followed during installation.
Is this Sentron ED frame breaker suitable for DC applications?
Yes, the HED42B125 is rated for direct current systems up to 250VDC. It provides a 30kA interrupting capacity for DC circuits, making it suitable for specific industrial control or battery backup applications.
Are the trip settings adjustable on the HED42B125?
No, this breaker utilizes a fixed thermal and fixed magnetic trip unit. Neither the long-time nor the instantaneous trip functions can be field-adjusted.
How does the HED4 series differ from standard ED4 breakers?
The HED4 prefix indicates a high-interrupting tier within the Siemens Sentron ED frame family. It delivers a 42kA interrupting capacity at 480VAC, whereas standard ED4 breakers are typically rated for 18kA at the same voltage.
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