Technical Parameters General Product Type: HRC (High Rupturing Capacity) fuse link Model / Type: OFAFC3GG630 Utilization Category: gG (general purpose, full range protection) Rated Current: 630 A Fuse Size / NH Size: NH3 / Size III Fuse System: DIN‑type industrial fuse link Electrical Ratings Rated Operational Voltage (AC): up to 500 V AC Rated Operational Voltage (DC): Application‑dependent (typically similar DC limits with correct holders) Breaking Capacity: High breaking capacity suitable for industrial systems (typically 80 kA or higher at 500 V AC; depends on exact specification) Rated Insulation Voltage (Ui): Suitably high for low‑voltage distribution applications Performance Overcurrent Protection: Provides full range protection for overload and short‑circuit faults in power distribution Current‑Limiting: Offers current‑limiting behavior to reduce let‑through energy and mechanical stress on system equipment Thermal Characteristics: Stable rating at ambient operating temperatures typical of industrial electrical rooms Mechanical & Physical Construction: Compact NH3 HRC fuse link with robust metal and insulating materials Mounting: Installed in compatible NH3 fuse bases or switch‑fuse disconnectors Indication: Some holders provide blown‑fuse indication when used with this link Environmental Operating Temperature: Standard industrial ambient range Pollution Degree: Designed for typical industrial environments and power distribution boards Applications Overcurrent protection in industrial power distribution systems Protection of feeders and sub‑circuits Protection of transformers and motor circuits Use in NH3 switch‑fuse disconnectors and bases Main and branch circuit protection in electrical panels