Panel Mount Fuse Holders Clips and Accessories | 5x20mm 250V Industrial Fuse Base
Industrial grade panel mount fuse holders with matching clips and accessories, bakelite UL94 V0 flame retardant housing and 0.5mm phosphor bronze terminals, 10A 250V AC/DC rated, 3000V withstand voltage, designed for industrial power supplies, control panels and distribution circuit overcurrent protection.
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The panel mount fuse holders clips and accessories series is a classic panel-installed circuit protection solution for 5×20mm cartridge fuses. This 5x20mm panel mount fuse holder adopts high-temperature bakelite insulating base paired with 0.5mm phosphor bronze conductive terminals, delivering reliable insulation performance, stable contact and durable overcurrent protection for low-voltage AC and DC circuits. With standard panel cutout design and matching accessory compatibility, it is widely used in industrial control equipment, switching power supplies, power distribution units and instrumentation front panels.
Core Product Features
- Complete solution: includes panel mount fuse holder, matching clips and compatible accessories, covers full circuit protection assembly requirements
- Compatible with standard 5×20mm glass and ceramic cartridge fuses, covers mainstream low-voltage protection specifications
- Rated 10A at 250V AC/DC, wide voltage compatibility, strong versatility across different application scenarios
- Bakelite (phenolic resin) housing, UL94 V0 flame retardant grade, excellent high-temperature resistance and arc suppression performance
- 0.5mm thick phosphor bronze terminals, high elasticity, stable clamping force, contact resistance below 5mΩ
- 3000V AC power frequency withstand voltage, insulation resistance above 100MΩ, high operational safety
- 50A breaking capacity, effectively interrupts fault current to protect downstream electrical components
- Threaded panel mount structure, standard cutout size, easy front-panel fuse replacement without opening enclosure
- Fully RoHS compliant, meets global electronics safety and environmental protection requirements
Compared with PCB mount fuse clips, this panel type model provides more flexible installation positions and easier daily maintenance. Its bakelite housing has outstanding thermal stability and arc resistance, making it a standard protection solution for low-voltage control circuits and bench-top power supply units. The matching clips and accessories ensure consistent assembly quality and long-term reliable operation.
Full Technical Specifications
| Specification Item | Parameter Value |
|---|---|
| Model | R3-12 |
| Compatible Fuse | 5 × 20mm glass / ceramic cartridge fuse |
| Rated Current | 10A |
| Rated Voltage | 250V AC / DC |
| Breaking Capacity | 50A |
| Power Frequency Withstand Voltage | 3000V AC |
| Housing Material | Bakelite, UL94 V0 flame retardant |
| Terminal Material | 0.5mm thick phosphor bronze |
| Contact Resistance | ＜ 5 mΩ |
| Insulation Resistance | ＞ 100 MΩ |
| Mounting Method | Panel mount, threaded nut fixing |
Selection & Application Guidance
When selecting panel mount fuse holders, clips and accessories, first confirm the fuse size, system rated voltage and operating current. Choose a 5x20mm fuse with appropriate current rating based on actual load, and reserve a 1.25–1.5 times safety margin to prevent overheating during continuous operation. For equipment requiring front-panel fuse replacement, panel mount models are the preferred choice as they allow quick fuse replacement without opening the equipment enclosure. For arc suppression and insulation-sensitive scenarios, bakelite housing models are recommended for better high-temperature resistance and operational safety. Matching clips and accessories ensure consistent assembly and long-term contact stability.
Typical Application Scenarios
- Industrial control panels and small automation equipment circuits
- Switching power supplies, adapters and power distribution units
- Test instruments and laboratory power supply circuits
- Household appliances and small electrical equipment power protection
- Communication equipment and network terminal power protection
- LED lighting drivers and low-voltage power modules
- Medical equipment auxiliary circuits and low-voltage control systems
Installation & Maintenance Instructions
1. Select a 5x20mm cartridge fuse with correct current and voltage rating according to circuit protection requirements.
2. Drill a standard mounting hole on the equipment panel, insert the fuse holder from the front side, and tighten the fixing nut from the back to ensure firm installation.
3. Connect circuit wires tightly to the rear terminals and apply proper insulation treatment to prevent short circuit hazards.
4. Insert the fuse fully into the holder and tighten the end cap to ensure reliable contact and insulation performance.
5. Do not operate beyond the rated voltage and current range to prevent insulation breakdown and safety risks.
6. Disconnect the power supply completely before fuse replacement to avoid electric shock and short circuit damage.
7. Inspect terminals, clips and fuses periodically for looseness, oxidation or overheating signs, and replace components promptly if abnormalities are found.
Frequently Asked Questions
Q1: What fuse size do these panel mount fuse holders support?
A1: They are compatible with all standard 5×20mm glass and ceramic cartridge fuses, which is the most widely used small-size specification for low-voltage equipment and control circuit protection.
Q2: What are the rated current and voltage?
A2: The rated current is 10A, and the rated voltage is 250V for both AC and DC, covering most low-voltage electrical equipment protection scenarios.
Q3: What material is the housing made of?
A3: The housing is made of bakelite (phenolic resin) with UL94 V0 flame retardant grade, featuring excellent high-temperature resistance, arc suppression and insulation performance.
Q4: What is the withstand voltage and insulation resistance?
A4: It supports 3000V AC power frequency withstand voltage, with insulation resistance above 100MΩ, providing high insulation strength and operational safety for low-voltage circuits.
Q5: Are matching clips and accessories available?
A5: Yes, this series includes panel mount fuse holders, matching conductive clips and compatible accessories, forming a complete circuit protection solution for consistent assembly performance.
Q6: What mounting method does it adopt?
A6: It adopts panel mount design with threaded nut fixing structure, which can be directly installed on equipment front panels and control cabinet surfaces, with firm installation and convenient daily maintenance.
Q7: What are the main application fields?
A7: Widely used in industrial control equipment, switching power supplies, test instruments, household appliances, communication equipment and various low-voltage AC/DC circuit overcurrent protection.
