CA5-01 ABB Thermal overload relay Provide reliable motor protection

Product Overview

ABB CA5-01 is a thermal overload relay in the ABB CA5 series specifically designed for extremely small power three-phase asynchronous motors, with a rated working current range of 0.1A to 1.6A. This product integrates one normally open (NO) auxiliary contact and features dual protection functions of overload and phase loss. It is suitable for control cabinet applications with high requirements for space and precision. The CA5-01 can be flexibly combined with ABB A series or AF series contactors to form a compact motor starting protection unit, which is widely used in automation equipment, building systems and OEM complete sets of equipment.

Key features

✅ high-precision protection

Adopting the principle of bimetallic strip thermal sensing, it accurately responds to motor overload. The tripping characteristic complies with the IEC/EN 60947-4-1 standard (Class 10A).

✅ phase loss protection function

It is equipped with a built-in three-phase current imbalance detection mechanism. When any phase is disconnected, it will automatically trip to prevent the motor from burning out due to single-phase operation.

✅ modularized & space-saving

Standard width of 45mm, supports 35mm DIN rail installation, and can also be directly assembled on the right side of compatible contactors, saving cabinet space.

✅ security compliance

It has passed international certifications such as CE, UL, CSA, CCC and TUV, and complies with the RoHS and REACH environmental protection directives.

✅ easy to maintain

The transparent window allows for an intuitive view of the contact status. The reset button is easy to operate and supports both automatic and manual reset (default is automatic reset).

Basic parameters
Model CA5-01
Series ABB CA5 thermal overload relay
Rated operating current (Ie) 0.1-1.6 A (AC- 3,400 V)
Rated insulation voltage (Ui) : 690 V AC
Rated operating voltage (Ue) 230/400/690 V AC (50/60 Hz)
Auxiliary contact 1 NO (normally open)
The deduction level is Class 10A
Reset mode: Automatic reset (Manual reset attachment is available)
Protection grade IP20 (front)
Installation method: 35mm DIN rail (EN 60715) or assembled into a contactor
Operating temperature: -25°C to +55°C
Storage temperature: -40°C to +85°C
Altitude ≤ 2000 m (no volume reduction)
Dimensions (width × height × depth) : 45mm × 78mm × 78mm
Weight ≈ 0.1 kg

Typical application scenarios
Industrial automation
It is used for the starting, stopping and protection of medium-voltage motors, such as water pumps, fans, compressors and other equipment.
Power transmission and distribution
Load switching and protection in scenarios such as medium-voltage switch cabinets and substations.
Energy and infrastructure
Auxiliary control of photovoltaic inverters, pumping stations of water treatment plants, and backup power switching systems.
OEM equipment integration
As a standard component embedded in the OEM control cabinet, it enhances the reliability of the entire machine.

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