ABB CA4-10 Thermal Overload Relay for Reliable Motor Protection with Compact Design and Phase Loss Protection

CA4-10 ABB Thermal overload relay Provide reliable motor protection

Product Overview

ABB CA4-10 is a compact thermal overload relay in the ABB CA4 series, specifically designed to protect small three-phase asynchronous motors (rated current 0.1-10A) from overload and phase loss faults. This model is equipped with one normally open (NO) auxiliary contact and supports automatic reset function. It can be directly assembled with ABB A series contactors to form an integrated motor starting and protection unit. With high reliability, modular structure and international certification, it is widely used in industrial control cabinets, building automation systems and OEM equipment.

Key features

✅ precise overload protection

Adopting the principle of bimetallic strip thermal sensing, the tripping characteristic complies with the IEC/EN 60947-4-1 standard (Class 10A), ensuring that the power supply of the motor is cut off in time when overloaded.

✅ phase loss protection function

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

✅ space-saving & flexible installation

The width is only 45mm
Supports 35mm DIN rail mounting
It can be directly assembled on the right side of ABB A series contactors without the need for additional main circuit wiring
✅ security compliance

It has passed global mainstream certifications such as CE, UL, CSA, CCC, and TUV, and complies with RoHS and REACH environmental protection requirements.

✅ easy to maintain

The transparent window allows for a direct view of the tripping status. The reset button is easy to operate and supports upgrading to manual reset (optional accessories are required).

Basic parameters
Model CA4-10
Series ABB CA4 thermal overload relay
Rated operating current (Ie) 0.1-10 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 configuration 1 NO (Always open)
The deduction level is Class 10A
The reset mode is automatic reset (default), and the manual reset module is also available
Protection grade IP20 (front)
Installation method: 35mm DIN rail or assembled on A-series contactors
Operating temperature range: -25°C to +55°C
Storage temperature: -40°C to +85°C
Altitude ≤ 2000 m (no volume reduction)
Dimensions (width × height × depth) : 45mm × 90mm × 78mm
The weight is approximately 0.15 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.

Product Images

Related Products

We are a global trading company specializing in PLC automation and industrial controls.

Xiamen Changxuyuan Trading Co., Ltd. is a leading global online wholesale supplier, offering a wide selection of new and discontinued products. We are committed to providing a wide range of high-quality products to our global customers at highly competitive factory direct prices, fast delivery times, and first-class customer service.

Our goal is to provide high-quality products to our global customers at highly competitive factory direct prices.

The more you buy, the more you save! Our website is available in multiple major languages ​​to meet the needs of our growing international customer base. Looking for low-priced, high-quality products? Xiamen Changxuyuan Trading Co., Ltd. is your ideal choice, offering high-quality products, low prices, fast delivery, and professional service—all backed by our strong global presence.

Four Reasons to Choose Us
1. We have the world's largest selection of industrial spare parts, including a wide variety of new and discontinued products.
2. We update our product information daily.
3. We have a diverse buyer base from around the world, constantly searching for high-quality, low-priced products to meet the diverse needs of our large global customer base.

4. We offer a wide variety of styles at the lowest online prices.

Factory Prices
Leveraging our extensive and strong partnerships with domestic and international manufacturers, we are able to offer high-quality products at exceptionally low factory prices. We are committed to working with global wholesalers to secure the best prices. If you are interested in our products, please feel free to contact us. We are confident that you will enjoy all of our exquisite products at wholesale prices.

Fast Shipping/Professional Packaging
We have established long-term partnerships with UPS, FedEx, DHL, and other leading global carriers, enabling us to offer world-class shipping options. Our dedicated warehouse staff will meticulously process your order, ensuring packaging according to our strict and rigorous standards. Your product will be carefully inspected and securely packaged before shipment. We ship to thousands of customers in dozens of countries around the world every day, demonstrating our commitment as a leading global industrial spare parts company, ensuring the highest level of responsiveness at all times.

Best Customer Service
We value our relationships with every customer, and our dedicated customer service team is always here to assist you. Due to the vast product offering, all staff members are fully trained and familiar with the latest trends and products. We also offer a dedicated online chat service to answer all your questions and respond immediately. Your satisfaction is always our top priority.

Brands