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Siemens EF3-B070 E-Frame 70A 3-Pole Circuit Breaker

Siemens EF3-B070 E-Frame 70A 3-Pole Molded Case Circuit Breaker.

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ManufacturerSiemens

Part numberEF3-B070

Amperage 70A

Voltage 600V AC

Poles 3

Frame Type EF

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12-month warranty

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Veteran-owned

CAGE: 9NK75

70A current rating 600V AC voltage 3-pole configuration LI trip function Thermal Magnetic protection Bolt-on mounting Legacy E-frame

Product description

The Siemens EF3-B070 is a 3-pole, 70A molded case circuit breaker from the legacy E-frame series, designed for robust circuit protection. This breaker operates at up to 600V AC and features thermal-magnetic trip units with LI (Long-Time and Instantaneous) functions. It provides reliable overcurrent protection suitable for a wide range of industrial and commercial applications. Note: This is a legacy model.

This EF-frame circuit breaker is suitable for installation in older Siemens and I-T-E panelboards and switchboards that require a bolt-on connection. It is a key component in electrical distribution systems for manufacturing facilities, industrial plants, and commercial buildings.

Stanlo Automation, a veteran-owned surplus parts distributor, is your reliable source for the Siemens EF3-B070. We help you maintain your legacy equipment with hard-to-find parts, ensuring your operations continue without interruption.

Technical specifications

Amperage	70A
Voltage	600V AC
Poles	3
Frame Type	EF
Trip Function	LI (Long-Time and Instantaneous)
Protection	Thermal Magnetic
AIC Rating	14kA@480V
Mounting	Bolt-On
Series	EF

Common applications

Industrial Power Distribution

Commercial Electrical Panels

Legacy Equipment

Manufacturing Facilities

Building Automation

Compatible systems

Older Siemens Panelboards Older I-T-E Panelboards Compatible Switchboards

Also known as

Siemens EF3B070 MCCB ITE EF3B070 Siemens E-Frame Circuit Breaker

Replaces / compatible with

This legacy EF3B070 model is often replaced by the newer Siemens ED63B070 frame circuit breaker. Please verify compatibility.

Technical note

Expert tip

The EF3-B070 is a legacy E-frame breaker, often replaced by newer ED-frame models. Ensure proper compatibility before installation.

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Frequently asked questions

What are the typical applications for the Siemens EF3-B070 circuit breaker?

The Siemens EF3-B070 is suitable for older Siemens and I-T-E panelboards and switchboards, providing protection in industrial and commercial power distribution systems where legacy equipment is in place.