Key Technical Parameters

Main Circuit: 3-pole normally open (3NO); AC-3 9A/400V; AC-1 25A; Rated insulation voltage 690V AC; Impulse withstand voltage 6kV; Compatible motor power 4kW (380–400V), 2.2kW (220–230V)

Auxiliary Contacts: 1NO+1NC (mechanical interlock, IP20 finger protection)

Coil: Voltage selectable AC24/110/220/380V, DC24/48/110V; DC coil with built-in freewheeling diode

Environment and Protection: IP20; Operating temperature -25℃~60℃ (derating required at 60–70℃); Compliant with IEC 60947-4, UL 508, CE, CCC certifications

Lifespan: Mechanical life approximately 15–30 million cycles; AC-3 electrical life approximately 2 million cycles

Installation and Dimensions: Standard 35mm DIN Rail/panel mounting; Dimensions (W×H×D) approx. 45×77×86 mm; Weight approx. 320g

III. Structure and Function
Modular design, can be equipped with auxiliary contacts, delay heads, and mechanical interlocks to form reversible/star-delta starting schemes; High-efficiency arc extinguishing system, reducing contact erosion; Cage-type screw terminals, secure wiring, and convenient maintenance; Can be directly connected to thermal relays (such as the LR-D series) to form a motor starter.

IV. Typical Applications
Direct start, stop, and reverse control of small three-phase asynchronous motors; Remote switching of resistive loads such as lighting and heating; Distribution cabinets, PLC control cabinets, fans/pumps, packaging machinery, and assembly line equipment.