5x20mm Panel Mount Fuse Holder | 10A 250V AC IP40 Flame Retardant
5x20mm panel mount fuse holder with PBT UL94 V0 flame retardant housing, 10A 250V AC rated, IP40 dust protection, panel cutout installation, EN UL CSA certified for industrial and appliance circuit overcurrent protection.
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El panel mount fuse holder for 5x20mm cartridge fuses is a panel-installed circuit protection component designed for equipment front panels and control cabinets. This 5x20mm panel mount fuse holder adopts high-temperature PBT flame retardant housing with precision conductive terminals, delivering stable electrical connection and reliable overcurrent protection for various AC circuits. With IP40 dust protection grade and standard panel cutout design, it is widely used in industrial control equipment, power supplies, instrumentation and household appliances, featuring easy installation, safe operation and stable long-term performance.
Key Features of 5x20mm Panel Mount Fuse Holder
- Compatible with standard 5 × 20mm glass and ceramic cartridge fuses
- Rated parameters: 10A maximum current, 250V AC rated voltage
- Housing material: PBT engineering plastic, UL94 V0 flame retardant grade, high temperature resistance
- IP40 degree of protection, prevents solid foreign objects from entering, improves contact safety
- Standard 12.7mm panel cutout, fits 0.8mm to 1.8mm thick panels
- Contact resistance below 5mΩ, low power loss, stable electrical performance
- Standard color: Black; custom colors available on demand
- Compliant with EN 60127-6, UL 512 and CSA C22.2 No.39 international standards
Compared with PCB mount fuse holders, this panel type fuse base provides more flexible installation positions and easier maintenance access. Its front-mounted design allows quick fuse replacement without opening the equipment enclosure, significantly improving later maintenance efficiency for enclosed equipment and control cabinets.
Main Electrical Specifications
| Item | Parameter |
|---|---|
| Model | PTF/40 |
| Compatible Fuse | 5 × 20mm glass / ceramic cartridge fuse |
| Rated Current | 10A Max. |
| Rated Voltage | 250V AC |
| Rated Power Acceptance | 2.5W |
| Contact Resistance | ≤ 5 mΩ |
| Housing Material | PBT, UL94 V0 flame retardant |
| Degree of Protection | IP40 |
| Shocksafe Category | PC2 |
| Ambient Temperature Range | -30℃ ~ +85℃ |
| Standard Color | Black |
| Compliance Standards | EN 60127-6, UL 512, CSA C22.2 No.39 |
Mechanical & Installation Dimensions
| Dimension Item | Value (mm) |
|---|---|
| Total Body Length | 37.5 |
| Panel Cutout Diameter | 12.7 |
| Compatible Panel Thickness | 0.8 ~ 1.8 |
| Thread Diameter | 6.5 |
Selection & Temperature Derating Guide
When selecting a panel mount fuse holder, first confirm the fuse size, system rated voltage and working current, as well as the panel thickness and installation space. For high-temperature operating environments above 25℃, derate the current appropriately according to the temperature derating curve to ensure long-term reliability. At 85℃ ambient temperature, the usable current is significantly lower than the room temperature rated value. Always match the fuse rating with the actual working current of the circuit, reserving a 1.25-1.5 times safety margin to avoid premature fuse failure or insufficient protection. For equipment requiring dust protection, IP40 grade models are recommended to prevent dust from entering the contact area and causing poor contact.
Application Scenarios
- Industrial control cabinets and automation equipment front panels
- Switching power supplies, linear power supplies and power distribution units
- Test instruments and laboratory equipment
- Household appliances and small electrical equipment
- Communication power supplies and network equipment
- LED lighting drive power supplies
- Medical equipment auxiliary circuits
Installation & Usage Notes
1. Drill a 12.7mm diameter hole on the installation panel according to the dimension requirements, and ensure the panel thickness is within 0.8mm to 1.8mm.
2. Insert the fuse holder from the front of the panel, and tighten the fixing nut from the back to ensure firm installation without loosening.
3. Connect the circuit wires to the rear terminals tightly, and make proper insulation treatment to avoid short circuit risks.
4. Select a matching 5x20mm cartridge fuse with appropriate current rating, put it into the holder, and screw on the end cap tightly.
5. Do not use the fuse holder beyond its rated voltage and current range to prevent insulation breakdown and safety hazards.
6. Disconnect the power supply before replacing the fuse to avoid electric shock and short-circuit damage. The front panel design allows quick fuse replacement without opening the equipment enclosure.
7. Store in a dry and dust-free environment to prevent contact oxidation and insulation performance degradation.
Frequently Asked Questions
Q1: What size of fuse does this panel mount fuse holder fit?
A1: It is compatible with standard 5x20mm glass and ceramic cartridge fuses, which is the most common small fuse specification for low-voltage equipment and control panels.
Q2: What are the rated voltage and current of this fuse holder?
A2: The maximum rated current is 10A, and the rated voltage is 250V AC, covering most low-voltage industrial and household appliance circuit protection scenarios.
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 insulation, high temperature resistance and flame retardant performance.
Q4: What is the protection grade of this product?
A4: It has IP40 degree of protection, which can prevent solid foreign objects with diameter larger than 1mm from entering, effectively improving contact safety and dust resistance.
Q5: What size of panel hole is required for installation?
A5: It requires a 12.7mm diameter cutout on the panel, and is compatible with panel thickness from 0.8mm to 1.8mm, fixed with a threaded nut from the back side.
Q6: What safety certifications does this product have?
A6: It complies with EN 60127-6, UL 512 and CSA C22.2 No.39 international safety standards, meeting the access requirements of major global markets.
Q7: What is the operating temperature range?
A7: The normal operating ambient temperature range is -30℃ to +85℃. Current derating is required for long-term operation in high temperature environments.
