ABB 1SAX351001R1101 EF146-150 Overload Relay

1. Product Overview

The ABB 1SAX351001R1101 EF146-150 Overload Relay is a high-performance motor protection device for low-voltage motors, providing overload, phase-loss, and short-circuit protection. The EF146-150 relay uses electronic detection for precise current monitoring and reliable protection. It can be combined with ABB contactors to provide a complete motor control and protection solution. Its modular design allows for quick installation and maintenance, widely applicable in industrial automation systems and machinery.

2. Technical Specifications

• Model: 1SAX351001R1101

• Type: Overload Relay

• Rated Current Range: 38–150 A (adjustable)

• Rated Operating Voltage: AC 400 V / DC 24–60 V

• Protection Functions: Overload, phase-loss, short-circuit

• Output Contacts: NO/NC relay contacts

• Response Time: Fast response

• Mounting: Directly combined with contactor or DIN rail mount

• Operating Temperature: 0°C to +60°C

• Storage Temperature: -20°C to +70°C

• Protection Rating: IP20

• Indicators: LED status indicators

• Dimensions (W×H×D): ~80 × 100 × 75 mm

• Weight: ~0.8 kg

3. Advantages and Features

• Precise current monitoring: Real-time motor monitoring for safe operation.

• Multiple protection functions: Overload, phase-loss, and short-circuit protection prevent motor and equipment damage.

• Adjustable current setting: Flexible adjustment according to motor rated current.

• LED status indicators: Shows relay status and fault information for easy maintenance.

• Modular design: Can be directly combined with contactors, saving space and simplifying maintenance.

4. Typical Applications

• Industrial motor protection and control

• Conveyor systems, elevators, and pump equipment

• Automated production lines and machinery motor control

• HVAC systems and compressor protection

• Factory automation and smart manufacturing systems

5. Installation & Usage Notes

• Ensure the relay setting matches the motor rated current before installation.

• Secure all wiring to prevent loose connections or short circuits.

• Install in a dry, ventilated environment to prevent dust or liquid ingress.

• Regularly check LED status and relay operation to ensure motor safety.

• Avoid overload operation to prolong relay life.

The structure and details of the product： ​

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