6x30mm / 6x32mm Panel Mount Fuse Holder | 20A 250V Industrial Fuse Base

Panel mount fuse holder compatible with 6x30mm and 6x32mm cartridge fuses is a heavy‑duty panel‑installed over‑current‑protection component for medium‑power low‑voltage systems. This fuse holder uses high‑strength PBT insulating housing together with 0.8mm thick phosphor‑bronze conductive terminals, offering robust insulation, high current‑carrying performance and stable contact for both AC and DC circuits. The threaded‑nut panel‑mount design supports quick front‑side fuse replacement without opening the equipment enclosure, widely adopted in industrial control cabinets, switching power supplies, medium‑power household appliances and instrumentation front panels.

Core Product Features

• Compatible with standard 6×30mm and 6×32mm glass / ceramic cartridge fuses, covers mainstream medium‑power low‑voltage protection requirements
• Rated 20A at 250V / 125V AC/DC; 50A breaking capacity for effective fault‑current interruption
• PBT (polybutylene terephthalate) housing, UL94 V0 flame‑retardant grade; excellent heat‑resistance, arc‑suppression and dielectric performance
• 0.8mm thick phosphor bronze terminals, reinforced heavy‑duty construction, high spring tension, contact resistance below 5 mΩ
• 3000V AC power‑frequency withstand voltage; insulation resistance >100 MΩ for high‑safety operation
• Threaded‑nut panel‑mount structure, standard panel cut‑out dimension; easy front‑panel fuse servicing
• RoHS‑compliant, satisfies global electronics environmental‑protection and safety standards

Compared with light‑duty small‑size fuse holders, this unit uses thicker 0.8 mm phosphor bronze terminals to support 20A continuous load, making it suitable for medium‑power industrial and appliance projects. The PBT housing delivers superior thermal stability for long‑term cyclic‑load operating conditions.

Full Technical Specifications

Selection & Application Guidance

When selecting this 6×30 / 6×32 mm panel mount fuse holder, confirm fuse dimension, system voltage type (AC/DC), and continuous operating current first. The unit supports both 6×30 mm and 6×32 mm standard cartridge fuses. Choose matching‑rating fuses and keep a 1.25‑1.5× safety margin against continuous‑load overheating. For projects requiring front‑panel fuse change‑out, this threaded‑nut panel‑mount variant reduces maintenance work without opening equipment housing. Prefer UL94 V0 PBT‑housing parts for high‑temperature or arc‑risk environments. Verify panel cut‑out dimension matches drawing specifications for secure mounting and stable electrical contact.

Typical Application Scenarios

• Industrial control cabinets and medium‑power automation‑equipment circuits
• Switching power supplies, power adapters and power‑distribution units
• Test instruments and laboratory bench power‑supply circuits
• Medium‑power household appliances and commercial electrical equipment
• Communication equipment and network‑device power‑input protection
• LED power drivers and low‑voltage medium‑power modules
• Medical auxiliary equipment and low‑voltage control‑system circuits

Installation & Maintenance Instructions

1. Select correct‑rating 6×30 mm / 6×32 mm cartridge fuse per your circuit‑protection requirements.

2. Drill standard mounting hole on equipment panel; insert fuse holder from front face, fasten rear fixing nut to achieve firm installation.

3. Secure wiring to rear terminals properly and add necessary insulation protection to prevent short‑circuit hazards.

4. Insert cartridge fuse fully and tighten cap to guarantee reliable contact and insulation performance.

5. Do not operate beyond published rated voltage‑current limits to avoid insulation breakdown and safety risks.

6. Cut off full power supply before fuse replacement to prevent electric shock and accidental short‑circuit damage.

7. Periodically inspect terminals and fuses for looseness, oxidation or thermal overheating signs; replace components in time when anomalies are found.

R3-55B-Panel-fuse-holder

Frequently Asked Questions

Q1: Which fuse sizes does this panel mount fuse holder accept?

A1: It accepts standard 6×30 mm and 6×32 mm glass and ceramic cartridge fuses, widely‑used specifications for medium‑power low‑voltage circuit‑protection applications.

Q2: What are its rated current and voltage ratings?

A2: Rated current is 20A; rated voltage 250V /125V for both AC and DC, suitable for most medium‑power electrical‑equipment‑protection scenarios.

Q3: What material is the housing made of?

A3: Housing uses PBT engineering plastic with UL94 V0 flame‑retardant grade, featuring good heat‑resistance, arc‑suppression and insulation‑performance.

Q4: What are the terminals specifications?

A4: Terminals are constructed from 0.8 mm‑thick phosphor bronze for heavy‑duty 20A continuous‑current capacity; contact resistance is less than 5 mΩ.

Q5: What about insulation‑related electrical‑performance?

A5: 3000V AC power‑frequency withstand voltage; insulation resistance >100 MΩ to ensure safe low‑voltage‑circuit‑operation.

Q6: What mounting style does it adopt?

A6: Threaded‑nut panel‑mount design. Install from equipment front‑panel and fasten nut from rear side for stable installation and convenient fuse‑replacement maintenance.

Q7: What are main application‑fields?

A7: Applied for industrial‑control cabinets, switching power‑supplies, test instruments, household appliances, communication‑equipment and various medium‑power AC‑DC over‑current‑protection circuits.