R3‑55A Panel Mount Fuse Holder 20A 250V for 6x30mm Fuse Tube
R3‑55A screw‑type panel fuse holder, 20A 250V AC/DC for 6×30mm fuse. PBT UL94‑V0 base, 3000VAC withstand voltage. Factory direct supply, contact for quote.
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R3‑55A Panel Mount Fuse Holder 20A 250V for 6×30mm Fuse Tube
Product Overview
The R3‑55A panel‑mount fuse holder is a screw‑in chassis socket designed for standard 6×30 mm glass or ceramic fuse tubes, rated for 20A continuous current under 250V AC / DC conditions. Manufactured with flame‑retardant PBT UL‑94V‑0 housing and thick 0.8 mm phosphor bronze terminals, this fuse socket delivers stable electrical performance for power equipment, instrument panels and industrial control devices.
With 3000VAC dielectric withstand voltage, low contact resistance＜5 mΩ and insulation resistance＞100 MΩ, R3‑55A offers reliable circuit‑protection against overload and short‑circuit risk. The rated breaking capacity reaches 50A for fault‑current handling. Easy panel cut‑out mounting with locking nut, it allows quick fuse replacement without complex wiring. As a factory‑direct component from Dongguan GongFu Electronic (EssFuse), this fuse holder supports bulk wholesale and project sourcing for OEM & ODM buyers.
Key Features & Benefits
- ✅ Fits standard 6×30 mm fuse tube, rated 20A 250V AC/DC, breaking current up to 50A → compatible with most common 6×30 fuses for heavy‑duty low‑voltage circuit protection
- ✅ Base material: PBT UL94‑V0 flame‑retardant plastic → anti‑ignition, high‑temperature resistant for long‑term equipment operation
- ✅ 0.8 mm phosphor bronze terminals → good conductivity, anti‑oxidation, keep low contact resistance (<5 mΩ)
- ✅ High dielectric strength: 3000 VAC withstand voltage, insulation resistance＞100 MΩ → safe isolation, reduce electric‑shock risk
- ✅ Screw‑cap panel cut‑out installation with lock nut → simple assembly on cabinet / instrument panel, convenient fuse replacement
- ✅ Strict factory quality inspection, mass‑production stable supply → ideal for volume procurement of electronic device manufacturers
Technical Specifications
| Item | Parameter |
|---|---|
| Model | R3‑55A |
| Rated Current | 20 A |
| Rated Voltage | 250V AC / 125V DC |
| Compatible Fuse Size | 6 × 30 mm fuse tube |
| Breaking Current | 50 A |
| Housing Base | PBT (UL‑94 V‑0) |
| Terminal Material | 0.8 mm Phosphor Bronze |
| Withstand Voltage | 3000 VAC |
| Contact Resistance | ＜5 mΩ |
| Insulation Resistance | ＞100 MΩ |
| Mounting Type | Panel‑mount (nut locking) |
| Note | Subject to product upgrade without prior notice |
Product Dimension Drawing
Overall length:54.0 mm; Panel cut‑out diameter:19.8 mm; Refer to dimension drawing for exact installation size.
R3‑55A 20A 250V panel mount screw‑type fuse holder for 6x30mm fuse tube
Application Scenarios
- Industrial control cabinets & power supply units
- Medical instruments, testing & measuring equipment
- Household appliances, charging equipment
- Automation control devices
- OEM electronic assembly projects
Frequently Asked Questions
1: What fuse size fits R3‑55A fuse holder?
This holder is made for standard 6×30 mm glass or ceramic cartridge fuses.
2: Can R3‑55A work under DC voltage?
Yes, rated for both AC 250V and DC 125V, max continuous current 20A.
3: What is the panel hole size required for installation?
Recommended panel cut‑out hole diameter:19.8 mm, check dimension drawing for mechanical dimensions.
4: Do you offer bulk wholesale and custom service?
Yes, we are original manufacturer. Contact us for MOQ, quotation and customization options.
