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ABB TA25 DU 14 (10–14 A thermal overload relay) you asked about — a device used for motor protection in control circuits:

This is a thermal overload relay from ABB’s TA25 series, designed to protect electric motors against overload and phase failure. It’s a three-pole device with an adjustable current range of 10 – 14 A, suitable for use with compatible contactors and motor starters. 

📌 Key Features
• 🔹 Current setting: 10 – 14 A (full-load current range) 
• 🔹 Three-pole thermal protection for 3-phase motors 
• 🔹 Auxiliary contacts: Normally Open (NO) and Normally Closed (NC) for signaling/control 
• 🔹 Mounting: Typically used with A-series contactors in motor starter panels 
• 🔹 Trip class: Class 10 (standard thermal trip timing) 
• 🔹 Rated insulation voltage: up to ~690 V AC 
• 🔹 Dimensions: approx. 80 × 44 × 94 mm 

🛠 Typical Use

Used in motor control circuits as part of starters (with contactors) to prevent damage from overheating due to overcurrent or phase loss. It trips when the motor draws too much current for too long.