ABB TA2X1.2-4.0 Thermal Overload Relay with 1.2-4.0A Rated Current for Precise Thermal Protection and Compact Modular Structure

TA2X2.2-32 ABB TThermal overload relay Precise thermal protection provided medium small power motors

Product Overview

ABB TA2X1.2-4.0 is a compact thermal overload relay in the ABB TA2X series, specifically designed to protect small power three-phase asynchronous motors (rated current 1.2- 4.0A) 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 sensitivity, modular structure and international certification, it is widely used in automation equipment, building systems and OEM complete sets of equipment.

Key features

✅ high-precision microcurrent protection

Optimized for low-current motors, with a starting voltage of 1.2A, it precisely responds to minor overloads, avoiding protection blind spots or false operations.

✅ 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.

✅ compact modular structure

The width is only 45mm
Supports 35mm DIN rail mounting
It can be directly assembled on the right side of ABB A series contactors (such as A9, A12), and the main circuit is automatically connected, saving space and wiring time
✅ security compliance certification

It has passed international certifications such as CE, UL, CSA, CCC, and TUV, complies with IEC/EN 60947-4-1 and GB 14048.4 standards, and meets the global project access requirements.

✅ is easy to operate and maintain

The transparent window allows for a direct view of the tripping status. The reset button is easy to operate. It resets automatically by default. A manual reset module can also be optionally equipped to enhance safety.

Basic parameters
Model TA2X1.2-4.0
Series ABB TA2X thermal overload relays
Rated operating current (Ie) 1.2-4.0 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
Reset mode: Automatic reset (default), manual reset of attachments (such as HHRM -11)
Protection grade IP20 (front)
Installation method: 35mm DIN rail or assembled on ABB 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 × 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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