EF370-380

Name: EF370-380
Brand: ABB
SKU: EF370-380

The ABB EF370-380 is a self-supplied electronic overload relay designed to provide reliable and fast protection for motors. It offers a wide setting range, high accuracy, and high operational temperature range, making it suitable for various motor applications.

Product ModelEF370-380

Material Number1SAX611001R1101

Product ID84438

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Self-Supplied DesignThe EF370-380 operates without an external power supply, ensuring it can be easily integrated into any motor protection system.
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2. Wide Setting RangeThis relay offers a broad range of settings, allowing it to be tailored to various motor applications and requirements.
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3. High AccuracyThe EF370-380 provides precise overload protection, ensuring the motor operates within safe parameters to prevent damage.
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4. High Operational Temperature RangeIt can operate effectively in a wide range of temperatures, making it suitable for diverse environmental conditions.
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Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Product Net Width

105 mm

Product Net Height

187.6 mm

Product Net Depth / Length

122.8 mm

Product Net Weight

1.338 kg

Setting Range

115 ... 380 A

Rated Operational Voltage

Auxiliary Circuit 600 V AC/DC Main Circuit 1000 V AC

5. Trip Class SelectionUsers can select from trip classes (10E, 20E, 30E) to customize the relay according to their specific protection needs.

Rated Operational Current (Ie)

380 A

Rated Frequency (f)

Auxiliary Circuit 50 Hz Auxiliary Circuit 60 Hz Auxiliary Circuit DC Main Circuit 50 Hz Main Circuit 60 Hz

Rated Impulse Withstand Voltage (Uimp)

Auxiliary Circuit 6 kV Main Circuit 8 kV

Rated Insulation Voltage (Ui)

1000 V

Number of Poles

Number of Auxiliary Contacts NC

Number of Auxiliary Contacts NO

Number of Protected Poles

Conventional Free-air Thermal Current (Ith)

Auxiliary Circuit NC 5 A Auxiliary Circuit NO 5 A

Rated Operational Current AC-15 (Ie)

(240 V) NC 3 A (240 V) NO 3 A (400 V) NC 1.1 A (400 V) NO 1.1 A (500 V) NC 0.75 A (500 V) NO 0.75 A

Rated Operational Current DC-13 (Ie)

(125 V) NC 0.55 A (125 V) NO 0.5 A (24 V) NC 1.5 A (24 V) NO 1.5 A (250 V) NC 0.27 A (250 V) NO 0.27 A (60 V) NC 0.55 A (60 V) NO 0.55 A

Degree of Protection

Housing IP20 Main Circuit Terminals IP00

Pollution Degree

Connecting Capacity Auxiliary Circuit

Flexible with Ferrule 1/2x 0.75 ... 2.5 mmÂ² Flexible with Insulated Ferrule 1/2x 0.75 ... 2.5 mmÂ² Flexible 1/2x 0.75 ... 2.5 mmÂ² Rigid 1/2x 1 ... 4 mmÂ²

Connecting Capacity Main Circuit

Hole Diameter > 10 mmÂ² Rigid or Flexible with Cable Lug 1x 50 ... 240 mmÂ² Rigid or Flexible with Cable Lug 2x 50 ... 150 mmÂ²

Tightening Torque

Auxiliary Circuit 0.8 ... 1.2 NÂ·m Main Circuit 28 NÂ·m

Wire Stripping Length

Auxiliary Circuit 9 mm

Recommended Screw Driver

Auxiliary Circuit Pozidriv 2

Mounting Position

1 ... 6

Power Loss

at Rated Operating Conditions per Pole 0.37 ... 4.043 W

Suitable For

A210 A260 A300 AF210 AF260 AF300 AF265 AF305 AF370

Standards

IEC/EN 60947-1 IEC/EN 60947-4-1 IEC/EN 60947-5-1 UL 60947-1 UL 60947-4-1

Maximum Operating Voltage UL/CSA

Main Circuit 600 V AC

Contact Rating UL/CSA

(NC:) B600 (NC:) Q600 (NO:) B600 (NO:) Q600

Connecting Capacity Main Circuit UL/CSA

Stranded 1/2 x 1-500 AWG

Connecting Capacity Auxiliary Circuit UL/CSA

Flexible 1/2x 18-10 AWG Stranded 1/2x 18-10 AWG

Tightening Torque UL/CSA

Auxiliary Circuit 7 ... 11 inÂ·lb Main Circuit 247 inÂ·lb

Ambient Air Temperature

Operation -25 ... +70 Â°C Operation Compensated -25 ... +70 Â°C Storage -50 ... +85 Â°C

Ambient Air Temperature Compensation

Yes

Maximum Operating Altitude Permissible

2000 m

Resistance to Shock acc. to IEC 60068-2-27

11 ms Pulse 25g

Resistance to Vibrations

5g 3 ... 150 Hz

RoHS Status

Following EU Directive 2011/65/EU and Amendment 2015/863 July 22, 2019

Toxic Substances Control Act - TSCA

2CMT2023-006525

Object Classification Code

ETIM 4