5x20mm Panel Fuse Holder | 10A 250V Board Mount Fuse Holders

The panel fuse holder for 5x20mm cartridge fuses is a heavy-duty panel-installed circuit protection component built for thick-enclosure electrical equipment. This board mount fuse holder adopts high-strength PBT insulating housing paired with high-conductivity metal terminals, delivering stable contact, reliable insulation and durable overcurrent protection for low-voltage AC circuits. With IP40 dust protection, multiple international safety certifications and wide panel thickness compatibility, it is widely used in industrial control equipment, thick-cabinet appliances, switching power supplies and instrumentation front panels.

Core Product Features

• Universal fit for standard 5×20mm glass and ceramic cartridge fuses, covers mainstream low-voltage protection specifications
• Rated 10A at 250V AC, 2.5W rated power dissipation, stable performance under continuous operation
• PBT engineering plastic housing, UL94 V0 flame retardant grade, excellent heat resistance, mechanical strength and insulation performance
• IP40 degree of protection, blocks solid foreign objects and dust, improves reliability in industrial workshop environments
• Wide panel thickness compatibility: fits 0.8mm to 6.5mm thick panels, adapts to various metal and plastic enclosure designs
• Contact resistance below 5mΩ, low power loss, stable electrical performance under long-term load
• Wide operating temperature range from -30℃ to +85℃, adapts to various indoor and industrial working environments
• Certified to EN 60127-6, UL 512 and C22.2 No.39 standards, meets global market access requirements
• Standard black finish, custom colours available on request to match different equipment appearance designs

Compared with thin-panel dedicated fuse holders, this model supports up to 6.5mm panel thickness, covering more thick-enclosure industrial equipment and household appliance designs. Its PBT housing provides better heat and chemical resistance than standard PA nylon models, making it more suitable for long-term operation in high-temperature and harsh industrial environments.

Full Technical Specifications

Selection & Application Guidance

When selecting a 5x20mm panel fuse holder, first confirm the fuse size, system rated voltage, operating current and panel thickness. For thick-enclosure equipment with panel thickness above 3mm, this PTF/35 model with 0.8–6.5mm wide compatibility is recommended. For export equipment requiring international safety certification, this EN/UL/CSA certified model simplifies market compliance approval. Choose a 5x20mm fuse with appropriate current rating based on actual load, and reserve a 1.25–1.5 times safety margin to prevent overheating during continuous operation. For dusty industrial environments, IP40 dust-proof models are preferred to extend service life.

Typical Application Scenarios

• Industrial control cabinets and thick-enclosure automation equipment circuits
• Switching power supplies, industrial power modules and power distribution units
• Test instruments, meters and laboratory power supply circuits
• Household appliances and medium-power electrical equipment
• Communication equipment and network terminal power protection
• LED lighting drivers and low-voltage power modules
• Medical equipment auxiliary circuits and control systems

Installation & Maintenance Instructions

1. Select a 5x20mm cartridge fuse with correct current and voltage rating according to circuit protection requirements.

2. Drill a standard mounting hole on the equipment panel, insert the fuse holder from the front side, and fix it properly to ensure firm installation.

3. Connect circuit wires tightly to the rear terminals and apply proper insulation treatment to prevent short circuit hazards.

4. Insert the fuse fully into the holder and tighten the end cap to ensure reliable contact and insulation performance.

5. Do not operate beyond the rated voltage and current range to prevent insulation breakdown and safety risks.

6. Disconnect the power supply completely before fuse replacement to avoid electric shock and short circuit damage.

7. Inspect terminals and fuses periodically for looseness, oxidation or overheating signs, and replace components promptly if abnormalities are found.

PTF35-Panel-fuse-holder

Frequently Asked Questions

Q1: What fuse size does this panel fuse holder support?

A1: It is compatible with all standard 5×20mm glass and ceramic cartridge fuses, which is the most widely used small-size specification for low-voltage equipment and control circuit protection.

Q2: What are the rated current and voltage?

A2: The rated current is 10A, and the rated voltage is 250V AC, covering most low-voltage electrical equipment protection scenarios.

Q3: What material is the housing made of?

A3: The housing is made of PBT engineering plastic with UL94 V0 flame retardant grade, featuring excellent heat resistance, mechanical strength and insulation performance.

Q4: What panel thickness is suitable for installation?

A4: It fits panel thickness from 0.8mm to 6.5mm, compatible with both thin and thick metal / plastic enclosure panel designs.

Q5: What is the protection degree of this product?

A5: It has an IP40 degree of protection, which prevents solid foreign objects larger than 1mm and dust from entering, improving operational reliability in industrial workshop environments.

Q6: Does this product have international safety certifications?

A6: Yes, it is certified to EN 60127-6, UL 512 and C22.2 No.39 standards, meeting the market access requirements of major global regions.

Q7: What are the main application fields?

A7: Widely used in industrial control equipment, thick-enclosure appliances, switching power supplies, test instruments, communication equipment and various low-voltage AC circuit overcurrent protection.