Inline Harness Fuse Holder | 6x30mm 30A High Voltage Threaded Fuse Block
- High voltage inline harness fuse holder compatible with 6x30mm cartridge fuses, phenolic resin UL94 V0 flame retardant housing, 30A rated current, 250V/500V/1000V wide voltage range, threaded connection, customizable wire gauge for industrial and solar circuit overcurrent protection.
Need a Fuse for Your Project?
Share your requirements with us for product guidance and a quotation.
The inline harness fuse holder is a heavy-duty circuit protection component designed for 6×30mm and 6.35×31.75mm cylindrical cartridge fuses. Built with high-grade phenolic resin housing and precision threaded conductive terminals, this inline harness fuse holder delivers reliable insulation, strong arc resistance and stable current carrying performance for medium to high voltage AC/DC circuits. Its threaded wiring structure supports flexible inline series installation on wiring harnesses, and is widely used in industrial power supplies, solar photovoltaic systems, energy storage equipment and high-voltage power distribution units.
Key Product Features
- Universal compatibility: fits standard 6×30mm and 6.35×31.75mm cylindrical glass and ceramic cartridge fuses
- Wide voltage range: supports 250V, 500V and 1000V circuit applications, covers most industrial high voltage scenarios
- 30A maximum rated current, suitable for medium current high voltage circuit overcurrent and short circuit protection
- Housing made of phenolic resin, UL94 V0 flame retardant grade, excellent high temperature resistance and arc suppression performance
- Threaded terminal connection, firm wire fixation, low contact resistance, stable performance under long-term load
- Customizable wire gauge: matched with different wire diameters according to current rating, supports full wiring harness customization
- Excellent insulation and voltage withstand performance, ensures operational safety in high voltage working environments
- RoHS compliant, meets environmental and safety requirements for global industrial electronics markets
Compared with low-voltage plastic inline fuse holders, this phenolic resin high-voltage model has significantly improved voltage withstand and flame retardant capabilities, making it more adaptable to harsh industrial and new energy high-voltage environments. Its inline series design can be integrated at any position of the wiring harness, with high layout flexibility, and is a standard protection solution for medium and high voltage AC/DC harnesses.
Main Technical Specifications
| Item | Parameter |
|---|---|
| Model | GF/631P |
| Compatible Fuse | 6×30mm / 6.35×31.75mm cylindrical cartridge fuse |
| Max. Rated Current | 30A |
| Rated Voltage Range | 250V / 500V / 1000V AC/DC |
| Housing Material | Phenolic Resin, UL94 V0 flame retardant |
| Connection Method | Threaded terminal, inline harness wiring |
| Wire Gauge | Customized based on current rating |
| Flame Retardant Grade | UL94 V0 |
| Primary Applications | Industrial power, solar PV, energy storage, power distribution |
| Compliance | RoHS compliant, UL94 V0 certified material |
Selection & Wire Matching Guide
When selecting an inline harness fuse holder, first confirm the system voltage level, operating current and wire gauge of the target circuit. For circuits above 500V, phenolic resin models with sufficient voltage withstand rating must be selected to avoid insulation breakdown risks. Choose a 6x30mm fuse with appropriate current rating according to the actual load, and reserve a 1.25-1.5 times safety margin to prevent overheating during continuous operation. Different current ratings correspond to different wire cross-sections; we can provide custom wiring harness solutions based on your project specifications. For high-temperature and high-humidity industrial environments, phenolic resin housing is recommended for better aging resistance and longer service life.
Typical Application Scenarios
- Industrial power supplies, high-voltage power modules and distribution equipment
- Solar PV systems and small combiner box circuit protection
- Battery energy storage systems and BMS auxiliary circuit protection
- High-voltage DC power supplies and laboratory test instruments
- EV charging stations and new energy auxiliary power systems
- Telecom base stations and communication power equipment
- Industrial automation control cabinets and medium-voltage distribution units
Installation & Maintenance Instructions
1. Disconnect the power supply completely before installation to prevent electric shock and short circuit hazards.
2. Strip the wire insulation at both ends of the circuit, and connect the conductors to the threaded terminals on both sides of the fuse holder.
3. Tighten the threaded terminals evenly to ensure sufficient contact area and avoid overheating caused by loose connections.
4. Select a 6×30mm cartridge fuse with matching current and voltage rating, and insert it fully into the holder cavity.
5. Screw on the end cap tightly to maintain the housing’s insulation and environmental protection performance.
6. Restore power supply and verify normal operation of the protected circuit to confirm correct installation.
7. Inspect terminals and fuses periodically for looseness, oxidation or overheating signs, and replace components promptly if abnormalities are found.
