R3‑67B PCB Fuse Holder | For 6.35×31.75mm Tubular Fuse, 50A AC250V / DC1000V
Many hardware design engineers need reliable through‑hole PCB‑mount fuse sockets for high‑voltage board‑level circuit‑protection assignments. The R3‑67B PCB Fuse Holder is purpose‑built for standard 6.35×31.75 mm tubular fuses. In addition, it uses flame‑retardant PBT base paired with durable H65 brass contact terminals. Importantly, this PCB‑mount socket supports up to 50A rated‑current, with 250V AC and 1000V DC voltage capability. Therefore, hardware teams adopt this component for power‑supply PCBA and industrial control board designs which demand high insulation and strong dielectric‑withstand performance.
Related technical pages: Fuse Holders Category Page & Tubular Cartridge Fuses
Industry reference resource: IEC low‑voltage protective‑component specification library
Core Engineering Advantages
- PCB Through‑Hole Soldering Form Factor: Specifically, through‑hole pin layout fits standard PCB assembly processes. Furthermore, it suits mass reflow‑soldering production for large‑volume electronic‑equipment manufacturing.
- Flame‑Retardant Insulating Base: It adopts PBT housing material that achieves UL‑94V‑0 flammability classification. Meanwhile, the rigid plastic base delivers stable insulation performance under long‑term working cycles.
- Reliable H65 Brass Contact Terminals: H65 brass contacts maintain stable electrical conduction. As a result, it keeps low contact‑resistance and resists ordinary oxidation for board‑mount service‑life.
- High‑Grade Electrical Safety Index: This holder reaches >100 MΩ insulation‑resistance and >3000 VAC dielectric‑withstand value. Notably, these parameters satisfy safety‑requirements for many industrial power‑board designs.
- Wide Electrical Rating Coverage: It handles 50A maximum current for both AC 250V and DC 1000V working‑conditions for tubular‑fuse circuit‑protection.
- Important Design Reminder: Always match with genuine 6.35×31.75 mm tubular fuses; mismatched fuse dimensions will trigger poor contact and local over‑heating risks.
R3‑67B Full Technical Specifications
| Model | R3‑67B |
| Product Type | PCB through‑hole mount tubular fuse holder |
| Compatible Fuse Size | 6.35×31.75 mm tubular / cartridge fuse |
| Base Housing Material | PBT, UL‑94V‑0 flame‑retardant |
| Contact Material | H65 Brass |
| Rated AC | 50A @ 250V AC |
| Rated DC | 50A @ 1000V DC |
| Insulation Resistance | ＞100 MΩ |
| Dielectric Withstand Voltage | ＞3000 V AC |
| Mounting Method | PCB through‑hole soldering |
PCB Layout & Assembly Notes For Designers
Designers must reserve adequate creepage and clearance distances on PCB traces according to 1000V‑DC working‑voltage. For instance, insufficient trace spacing may bring potential arc‑over hazards under high‑voltage conditions. Also, follow standard through‑hole soldering temperature‑profile; avoid excessive high‑temperature exposure which will deform PBT plastic housing. Moreover, pick correct 6.35×31.75 mm cartridge‑fuse ampere‑rating with proper derating based on actual continuous‑load current. Finally, confirm mechanical footprint before finalizing your PCB Gerber files for mass‑production.
Practical Deployment Application Scenarios
System designers deploy R3‑67B PCB fuse holder for diverse board‑level protection tasks. For power‑electronics projects, it protects inside switching‑mode power‑supply PCBA. Besides power‑supply hardware, it fits industrial‑control circuit boards. Additionally, this component works for battery‑charge control boards and other electronic equipment requiring on‑board tubular‑fuse over‑current safeguard.
Factory‑Backed Pre‑Sales & After‑Sales Support
Dongguan GongFu Electronics (EssFuse / GFEFUSE) manufactures this R3‑67B PCB fuse holder series. We run dimensional sampling inspection plus electrical‑parameter testing for every batch before shipment. Also, we supply physical evaluation samples for your bench‑test and PCB layout verification. Furthermore, our engineering team supports OEM modification requests for large‑volume orders. Contact our sales team whenever you need dimension drawing or application‑oriented technical guidance.
👉 Request quotationR3-67B ( PCB fuse holder)
Technical FAQ For PCB Hardware Engineers
1: Which fuse size fits R3‑67B PCB fuse holder?
A: This through‑hole socket exclusively works with 6.35×31.75 mm standard tubular cartridge fuses.
2: What is the maximum DC‑voltage rating for R3‑67B?
A: It supports up to 1000V DC at 50A rated‑current for board‑mount circuit‑protection.
3: What value does R3‑67B reach for dielectric‑withstand test?
A: This PCB fuse holder achieves more than 3000 V AC dielectric‑withstand‑voltage for safety‑margin consideration.
4: What mounting style does R3‑67B adopt?
A: It uses through‑hole pin design for direct soldering onto printed‑circuit‑boards.
