TF96-78B

Name: TF96-78B
Brand: ABB
SKU: TF96-78B

The ABB TF96-78 thermal overload relay is an economic electromechanical protection device for the main circuit, offering reliable and fast protection for motors in the event of overload or phase failure. It features adjustable current settings, automatic/manual reset, and a trip-free mechanism.

Product ModelTF96-78B

Material Number1SAZ921201R1004

Product ID76402

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable ProtectionThe ABB TF96-78 thermal overload relay provides fast and reliable protection for motors against overloads and phase failures, ensuring your equipment operates safely and efficiently.
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2. Adjustable Current SettingWith an adjustable current setting, you can customize the relay to meet the specific needs of your motor, providing precise protection against overloads.
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3. Automatic/Manual ResetThe relay offers both automatic and manual reset options, allowing you to choose the best method for your application. This flexibility ensures that your motor can be quickly and safely restarted.
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4. Trip-Free MechanismThe TF96-78 features a trip-free mechanism, which prevents the relay from tripping again until it has been reset. This ensures continuous operation and minimizes downtime.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Product Net Width

106.3 mm

Product Net Height

106.9 mm

Product Net Depth / Length

69.9 mm

Product Net Weight

0.52 kg

Setting Range

65 ... 78 A

Rated Operational Voltage

Auxiliary Circuit 600 V AC/DC Main Circuit 690 V AC Main Circuit 440 V DC

5. Compact DesignThe compact design of the TF96-78 makes it easy to integrate into your existing electrical systems, taking up minimal space while providing robust protection. It is suitable for both three- and single-phase applications.

Rated Operational Current (Ie)

78 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)

690 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 6 A Auxiliary Circuit NO 4 A

Rated Operational Current AC-15 (Ie)

(240 V) NC 3 A (240 V) NO 0.5 A (400 V) NC 0.75 A (400 V) NO 0.5 A (500 V) NC 0.75 A (500 V) NO 0.5 A

Rated Operational Current DC-13 (Ie)

(125 V) NC 0.55 A (125 V) NO 0.55 A (24 V) NC 1.25 A (24 V) NO 1.25 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 IP10

Pollution Degree

Connecting Capacity Auxiliary Circuit

Flexible with Ferrule 1/2x 0.75 ... 2.5 mmÂ² Flexible with Insulated Ferrule 1x 0.75 ... 2.5 mmÂ² Flexible with Insulated Ferrule 2x 0.75 ... 1.5 mmÂ² Flexible 1/2x 0.75 ... 1 mmÂ² Flexible 1/2x 1 ... 2.5 mmÂ² Rigid 1/2x 0.75 ... 4 mmÂ²

Connecting Capacity Main Circuit

Flexible with Ferrule 1/2x 6 ... 35 mmÂ² Flexible with Ferrule 1x 6 ... 50 mmÂ² Flexible with Insulated Ferrule 1/2x 6 ... 16 mmÂ² Flexible with Insulated Ferrule 1x 6 ... 50 mmÂ² Flexible 1/2x 6 ... 35 mmÂ² Flexible 1x 6 ... 50 mmÂ² Rigid 1/2x 6 ... 35 mmÂ² Rigid 1x 6 ... 50 mmÂ²

Tightening Torque

Auxiliary Circuit 1 ... 1.2 NÂ·m Main Circuit 6.0 ... 9.0 NÂ·m

Wire Stripping Length

Auxiliary Circuit 9 mm Main Circuit 20 mm

Recommended Screw Driver

Auxiliary Circuit Pozidriv 2 Main Circuit Hexagon 4

Power Loss

at Rated Operating Conditions per Pole 2.7 ... 3.8 W

Suitable For

AF80B AF96B

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:) Q600 (NO:) D300

Connecting Capacity Main Circuit UL/CSA

Flexible 1x 8-1 AWG Flexible 2x 8-3 AWG Stranded 1x 8-1 AWG Stranded 2x 8-3 AWG

Connecting Capacity Auxiliary Circuit UL/CSA

Flexible 1/2x 18-12 AWG Stranded 1/2x 18-12 AWG

Tightening Torque UL/CSA

Auxiliary Circuit 9 ... 11 inÂ·lb Main Circuit 53 ... 80 inÂ·lb

Ambient Air Temperature

Operation -40 ... +70 Â°C Operation Compensated -40 ... +70 Â°C Storage -50 ... +80 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 25g 2 shocks 13 ms

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 5

EC000106 - Thermal overload relay

ETIM 6

EC000106 - Thermal overload relay

ETIM 7

EC000106 - Thermal overload relay

ETIM 8

EC000106 - Thermal overload relay

eClass

V11.0 : 27371501

UNSPSC

39121520

IDEA Granular Category Code (IGCC)

5364 >> Overload relay

Manufacturer ID

1SAZ921201R1004