5x20mm Panel Mount Fuse Holder | 10A 250V Industrial Grade Fuse Base
Industrial grade 5x20mm panel mount fuse holder with PBT UL94 V0 flame retardant housing and 0.5mm phosphor bronze terminals, 10A 250V/125V AC/DC rated, 3000V power frequency withstand voltage, designed for industrial control, power supplies and instrumentation circuit overcurrent protection.
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The panel mount fuse holder for 5x20mm cartridge fuses is a standard panel-installed overcurrent protection component for low-voltage electrical systems. Constructed with high-performance PBT insulating base and 0.5mm phosphor bronze conductive terminals, this 5x20mm panel fuse holder delivers reliable insulation performance, stable contact resistance and durable arc resistance for both AC and DC circuits. Its threaded panel mount structure and flame retardant housing make it widely applied in industrial control cabinets, switching power supplies, household appliances and front-panel instrumentation.
Key Features
- Compatible with standard 5×20mm glass and ceramic cartridge fuses, covering mainstream low-voltage protection specifications
- Rated 10A at 250V / 125V AC/DC, with 50A breaking capacity to interrupt fault currents effectively
- PBT engineering plastic housing, UL94 V0 flame retardant grade, excellent heat resistance and electrical insulation
- 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
- Threaded panel mount design, standard cutout size, tool-free front-panel fuse replacement
- RoHS compliant, meets global electronics safety and environmental protection requirements
Technical Specifications
| Item | Parameter |
|---|---|
| Model | MF-527 |
| Compatible Fuse | 5 × 20mm glass / ceramic cartridge fuse |
| Rated Current | 10A |
| Rated Voltage | 250V / 125V AC / DC |
| Breaking Capacity | 50A |
| Power Frequency Withstand Voltage | 3000V AC |
| Housing Material | PBT, 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 Guide
When selecting a 5x20mm panel mount fuse holder, confirm the fuse size, system rated voltage and operating current first. Select a 5x20mm fuse with appropriate current rating based on actual load, and reserve a 1.25–1.5 times safety margin to avoid overheating under continuous operation. For front-panel fuse replacement requirements, panel mount models are preferred for convenient maintenance without opening the enclosure. For flame retardant and high insulation scenarios, PBT housing with UL94 V0 grade is recommended to ensure operational safety. Verify that the panel cutout matches the standard mounting size to ensure firm installation and stable contact performance.
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
- Communication equipment and network terminal power protection
- LED lighting drivers and low-voltage power modules
- Medical equipment auxiliary circuits and control systems
Installation & Maintenance
1. Select a 5x20mm cartridge fuse with matching current and voltage rating per circuit protection requirements.
2. Drill a standard mounting hole on the equipment panel, insert the fuse holder from the front, and tighten the fixing nut from the back to ensure firm installation.
3. Tighten circuit wires 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 power completely before fuse replacement to avoid electric shock and short-circuit damage.
7. Inspect terminals and fuses periodically for looseness, oxidation or overheating, and replace components promptly if abnormalities are found.
Frequently Asked Questions
Q1: What fuse size does this panel mount fuse holder support?
A1: It is compatible with all standard 5×20mm glass and ceramic cartridge fuses, 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 covers 250V and 125V for both AC and DC, meeting most low-voltage electrical equipment protection requirements.
Q3: What material is the housing made of?
A3: The housing is made of PBT engineering plastic with UL94 V0 flame retardant grade, featuring excellent heat resistance, mechanical strength and electrical 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: What material are the terminals made of?
A5: The terminals are made of 0.5mm thick phosphor bronze, with high elasticity, contact resistance below 5mΩ, and stable clamping force after long-term use and multiple fuse replacements.
Q6: What mounting method does it use?
A6: It adopts panel mount design with threaded nut fixing, 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.
