Technical Parameters Parameter Category Specification Notes Base Device GSH204 400A frame high-performance contactor. Main Circuit Ratings • Rated Operational Current (Ie) 400 A (at AC-3, 400V) Standard rating for the GSH204 frame. • Rated Operational Voltage (Ue) Up to 690 V AC Handle / Actuator -C25 Front-mounted rotary handle. The 25 is a specific handle type code, likely indicating a particular design with padlocking capability and clear ON/OFF indication. Control Circuit Protection /0.3 Integrated 0.3A (300mA) fuse for the control coil circuit (terminals A1-A2). • Key Difference: This is ten times the rating of the common /0.03 (30mA) fuse. Control Coil Fuse (/0.3) Core Feature with Higher Rating • Purpose To protect the external control power source from sustained overloads or short-circuits in the contactor's coil circuit, while providing a higher trip threshold. • Rating 300 mA, gG or similar. • Application Rationale Used when: 1. The control circuit has longer wiring runs with higher inherent capacitance/leakage. 2. The coil inrush current is higher (e.g., for large DC coils or certain AC coils). 3. To coordinate with upstream protection and avoid nuisance tripping from transient currents. 4. The control source (e.g., a larger transformer or dedicated power supply) can safely support this higher fault current level until the fuse clears. Control Coil IMPORTANT: The model GSH204-C25/0.3 does not specify the coil voltage or type (AC/DC). This must be specified separately in the full order code (e.g., GSH204 A400 -C25/0.3 for a 400V AC coil). Utilization Categories AC-3, AC-4, AC-1 For very large motor and resistive load switching. Switching Capacity • Making Capacity (Icm): Very high, typically 4000A or more (peak). • Short-circuit Withstand: Requires backup protection. Mechanical Life ≥ 10 million operations Electrical Life (AC-3) ≥ 1.0 million operations at full rated current Auxiliary Contacts Modular blocks can be added. Mounting Heavy-duty foot mounting for panel installation. Dimensions & Weight Large and heavy (e.g., >15 kg).