PCB Fuse Clip 5x20mm | 6.3A 250VAC for Glass Cartridge Fuses
5x20mm PCB fuse clip with PA UL94 V0 flame retardant housing, 6.3A 250VAC rated, through hole mounting design for glass cartridge fuse overcurrent protection, UL EN certified, RoHS compliant.
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The PCB fuse clip 5x20mm is a compact and reliable through-hole circuit protection component designed for standard 5x20mm glass cartridge fuses. This PCB fuse clip 5x20mm adopts high-temperature flame-retardant PA insulating housing paired with precision stamped conductive contacts, delivering stable electrical connection and consistent overcurrent protection for various low-voltage printed circuit boards. It is widely used in switching power supplies, AC/DC adapters, household appliance control boards, industrial control modules and instrumentation circuits, featuring a simple elastic clamping structure, stable contact resistance and cost-effective design, making it a standard protection accessory for mass-produced electronic products.</p>
Key Features of 5x20mm PCB Fuse Clip
- Compatible with standard 5 x 20mm glass cartridge fuses, the most widely used small fuse specification
- Rated current: 6.3A; rated voltage: 250VAC, covering most low-voltage power supply scenarios
- Housing material: PA engineering plastic, UL94 V0 flame retardant grade, high temperature resistance
- Precision stamped metal contacts, low contact resistance, stable electrical performance
- Through-hole PCB mounting, compatible with wave soldering and manual soldering
- Standard color: Green; custom colors available on demand
- Compliant with EN 60127-6, UL 512 and CSA C22.2 No.39 standards
- RoHS compliant, suitable for global electronic product export
This glass fuse holder features a simple and reliable clamping structure, which ensures consistent contact force and low resistance even after multiple fuse replacements. Its compact size saves PCB space, making it ideal for high-density circuit board designs and mass production assembly.
Main Electrical Specifications
| Item | Parameter |
|---|---|
| Model | PTF/77B / PTF/77C |
| Compatible Fuse | 5 x 20mm glass cartridge fuse |
| Rated Current | 6.3A |
| Rated Voltage | 250V AC |
| Rated Power Acceptance | 1.6W |
| Housing Material | PA, UL94 V0 flame retardant |
| Contact Resistance | ≤ 5 mΩ |
| Degree of Protection | IP00 |
| Ambient Temperature Range | -30℃ ~ +85℃ |
| Shocksafe Category | PC1 |
| Compliance Standards | EN 60127-6, UL 512, CSA C22.2 No.39 |
| Standard Color | Green |
| Mounting Type | Through-hole PCB mount |
Mechanical Dimensions
| Dimension Item | Value (mm) |
|---|---|
| Total Body Length | 24.4 |
| Total Body Width | 9.4 |
| Body Height | 15.0 |
| Pin Size (Thickness × Width) | 0.5 × 1.2 |
| Pin Pitch | 15.0 |
Selection & Temperature Derating Guide
When selecting a PCB fuse clip, first confirm the fuse size, system rated voltage and working current. For 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 about 40% of the 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 high-humidity and dust-prone environments, additional conformal coating or enclosed fuse holders are recommended.
Application Scenarios
- Switching power supplies, AC/DC adapters and charger circuits
- Household appliances and small electrical equipment control boards
- Industrial control instrumentation and automation equipment
- Communication equipment and network terminal devices
- LED lighting driver circuits
- Automotive electronic auxiliary systems
- Small power distribution and protection modules
Installation & Usage Notes
1. Select a matching 5x20mm glass fuse with appropriate current rating according to circuit protection requirements.
2. Ensure proper soldering quality during through-hole installation to avoid cold solder joints that cause increased contact resistance and overheating.
3. Do not use the fuse clip beyond its rated voltage and current range to prevent insulation breakdown and safety hazards.
4. Disconnect the power supply before replacing the fuse to avoid electric shock and short-circuit damage.
5. Insert the fuse fully into the clip to ensure reliable contact, preventing loosening and poor contact.
6. Store in a dry, dust-free and corrosion-free environment to prevent contact oxidation and insulation performance degradation.
