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Mitsubishi Electric TH-K12AB is a thermal overload relay designed for protecting small motors and control circuits against overload and phase failure. It provides adjustable protection within a very low current range, making it suitable for fractional horsepower motors or sensitive applications. Technical Specifications: Manufacturer: Mitsubishi Electric Corporation Model: TH-K12AB Type: Thermal overload relay Current adjustment range: 0.20 – 0.32 A (adjustable) Poles: 3-pole (for 3-phase motor protection) Trip class: Class 10 (standard motor protection, ~10 s at 600% In) Auxiliary contacts: 1 NO + 1 NC (for signaling and control interlock) Rated insulation voltage (Ui): 690 V AC Rated operational voltage (Ue): Up to 600 V AC, 50/60 Hz Reset method: Manual or automatic reset switch Mounting: Direct mount on contactors (Mitsubishi series) or standalone with base Terminal type: Screw terminals (front accessible) Ambient compensation: Built-in, up to 55°C Protection functions: – Overload protection – Phase-loss protection – Trip-free mechanism (cannot be held in ON position when tripped) Applications: Small 3-phase motors, pumps, fans, machine tool auxiliaries, and control panel circuits Operating temperature: -10°C to +55°C Storage temperature: -25°C to +70°C Standards: IEC 60947-4-1, JIS, UL, CSA Manufacture location: Japan (Mitsubishi Electric production facilities) Please review pictures carefully and let us know if you have any questions!
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