5x20mm PCB‑Mount Fuse Holder | 6.3A Through‑Hole Industrial Fuse Base
Industrial‑grade through‑hole PCB‑mount fuse holder for 5×20mm glass & ceramic cartridge fuses, PA UL94 V0 flame‑retardant housing, 6.3A 250V AC rating, 1.6W rated power acceptance, PC1 shocksafe category,‑30℃~+85℃ ambient temperature, compliant with EN 60127‑6, UL512, C22.2 No.39, for consumer‑electronics, power adapters and industrial PCB over‑current protection.
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PCB mount fuse holder for 5x20mm cartridge fuses is a through‑hole soldered circuit‑protection component for low‑voltage electronic PCBA. This fuse base uses high‑grade PA UL94 V0 flame‑retardant insulating housing, with low contact‑resistance metal contacts, PC1 shock‑safe construction, and complies with EN, UL, CSA safety standards. Designed for through‑hole PCB wave‑soldering assembly; standard housing color is green, custom colors available upon request. Widely deployed in power adapters, household appliances, test instruments and general‑purpose electronic control boards.
Core Product Features
- Compatible with standard 5 × 20 mm glass / ceramic tubular cartridge fuses for low‑voltage electronic‑equipment protection
- Electrical rating: 6.3A @250V AC; rated power acceptance 1.6W for stable thermal performance
- Housing material: PA (Polyamide), UL94 V0 flame‑retardant grade; good heat‑resistance and dielectric strength
- Contact resistance below 5 mΩ, ensures low power‑loss under continuous working status
- Shock‑safe category PC1; degree of protection IP00; operating ambient temperature‑30 ℃ ~ +85 ℃
- Fully certified: EN 60127‑6, UL 512, C22.2 No.39, supports global market access for electronic products
- Through‑hole PCB soldering mounting design, fits conventional wave‑soldering mass‑production workflows
- Standard green housing; custom colors are acceptable on special request
- RoHS‑compliant construction, meets consumer‑electronics environmental‑protection requirements.
Different from panel‑mount fuse holders, this through‑hole PCB‑mount variant saves enclosure space, allowing fuse replacement directly on printed circuit boards. PC1 shock‑safe structure plus multi‑national safety certifications make it well‑suited for export‑oriented electronic device projects.
Full Technical Specifications
| Specification Item | Parameter Value |
|---|---|
| Model | PTF‑78 |
| Compatible Fuse | 5 × 20 mm glass / ceramic tubular cartridge fuse |
| Rated Current | 6.3A |
| Rated Voltage | 250V AC |
| Rated Power Acceptance | 1.6 W |
| Housing Material | PA, UL94 V0 flame‑retardant |
| Contact Resistance | ＜ 5 mΩ |
| Shock‑safe Category | PC1 |
| Degree of Protection | IP00 |
| Ambient Operating Temperature | ‑30 ℃ ~ +85 ℃ |
| Standard Housing Color | Green (custom colors on request) |
| Compliance Standards | EN 60127‑6, UL 512, C22.2 No.39 |
| Mounting Method | Through‑hole PCB soldering mount |
Note: Original datasheet does not provide insulation resistance and withstand‑voltage parameters.
Selection & Application Guidance
When selecting this 5×20 mm PCB‑mount fuse holder, confirm fuse dimension, system AC voltage and continuous operating current first. Choose matching‑rating 5x20mm tubular fuses and reserve a 1.25‑1.5× safety margin to avoid over‑heating under continuous load. For export‑targeted electronic products, verify compliance with EN / UL / CSA specifications. Follow official PCB layout drawing for pad design to guarantee soldering reliability and stable contact performance. Take IP00 rating into consideration for final equipment enclosure mechanical protection design.
Typical Application Scenarios
- Household‑appliance control PCB and consumer‑electronics circuits
- Power adapters, small switching‑power‑supply and power‑supply PCBA
- Test instruments, multimeters and laboratory small‑power circuit boards
- Communication equipment and network‑device auxiliary protection circuits
- LED drivers and low‑power lighting‑control PCBA
- Small‑industrial automation modules and low‑voltage control boards
Installation & Maintenance Instructions
1. Select correct‑rating 5.2 × 20 mm glass / ceramic tubular cartridge fuse for your circuit‑protection requirements.
2. Design PCB through‑hole pads strictly per official dimension drawing to ensure soldering compatibility.
3. Complete wave‑soldering or hand‑soldering with appropriate temperature and dwell‑time; avoid over‑heat damage to PA plastic housing.
4. Insert tubular fuse fully into holder cavity for reliable electrical contact.
5. Do not operate beyond published rated voltage‑current limits to prevent insulation breakdown and safety hazards.
6. Cut off power supply and discharge circuit before fuse replacement to prevent electric‑shock risk.
7. Periodically check for loose fuse, contact oxidation or heating; replace components promptly when anomalies appear.
Frequently Asked Questions
Q1: What fuse size fits this PCB‑mount fuse holder?
A1: It accepts standard 5 × 20 mm glass and ceramic tubular cartridge fuses, widely‑used for consumer‑electronics PCB‑level over‑current‑protection.
Q2: What are its electrical ratings?
A2: Rated 6.3A @ 250V AC; rated power acceptance 1.6W for thermal performance requirements.
Q3: What housing material and safety class does it have?
A3: PA housing with UL94 V0 flame‑retardant grade, PC1 shocksafe category, IP00 protection grade, standard green color with custom‑color support.
Q4: What is operating temperature range?
A4: Ambient operating temperature ranges from‑30 ℃ up to +85 ℃.
Q5: Which standards is this fuse holder compliant with?
A5: Compliant with EN 60127‑6, UL 512, C22.2 No.39 for global electronic‑product market‑access.
Q6: What mounting style does it adopt?
A6: Through‑hole PCB soldering mount, compatible with wave‑soldering mass‑production for printed circuit boards.
Q7: What are main application‑fields?
A7: Applied for household appliances, power adapters, test instruments, LED drivers, communication equipment and various low‑voltage PCB‑based over‑current‑protection circuits.
