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Siemens HED43B125 Sentron Series 125A 3-Pole Circuit Breaker

Siemens HED43B125 125A 3-Pole Molded Case Circuit Breaker

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ManufacturerSiemens

Part numberHED43B125

Amperage 125A

Voltage 480V AC

Poles 3

Interrupt Rating 42kA@480V

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CAGE: 9NK75

Thermal Magnetic Trip Unit Long-Time and Instantaneous Protection 42kAIC Interrupt Rating Sentron Series Reliability 3-Pole Configuration 480V Operation

Product description

The Siemens HED43B125 is a 3-pole molded case circuit breaker from the Sentron Series, engineered for heavy-duty electrical protection. It features a thermal magnetic trip unit with LI (Long-Time and Instantaneous) trip functions, rated for 125A and 480V. This breaker offers a high interrupting capacity of 42kAIC at 480V, ensuring safety and reliability in demanding applications [9, 15, 21, 31, 35, 36, 41]. It is part of the ED frame series.

This circuit breaker is designed for use in commercial and industrial distribution systems, including panelboards, switchboards, and motor control centers. Its robust construction and high fault current handling capability make it suitable for critical applications where dependable circuit protection is paramount.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens HED43B125. We are dedicated to providing quality surplus components and efficient service to meet your industrial automation needs.

Technical specifications

Amperage	125A
Voltage	480V AC
Poles	3
Interrupt Rating	42kA@480V
Frame Type	ED
Trip Type	Thermal Magnetic (LI)
Mounting	Bolt-On
Series	Sentron

Common applications

Industrial Power Distribution

Commercial Electrical Systems

Panelboard Protection

Switchboard Applications

Motor Control Centers

High Capacity Circuits

Compatible systems

Siemens P1 Panelboards Siemens P2 Panelboards Siemens P3 Panelboards SB Switchboards Motor Control Centers

Also known as

Siemens HED43B125 Circuit Breaker Siemens 125A 3P Breaker Sentron HED43B125

Replaces / compatible with

The Siemens HED43B125 is part of the Sentron ED frame series. It can be replaced by the Siemens 3VA5112-6EC31-0AA0, which requires a specific mounting strap kit for panelboard integration.

Technical note

Expert tip

The HED43B125, with its high amperage and AIC rating, is suitable for main feed protection in many commercial and industrial panelboards and switchboards.

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Frequently asked questions

What panelboards are compatible with the Siemens HED43B125 circuit breaker?

The Siemens HED43B125 circuit breaker is designed to mount into Siemens P1, P2, and P3 panelboards, as well as SB switchboards. Its bolt-on mounting style ensures secure integration.