5x20mm Glass Fuse Holder Panel Mount | 10A 250V Bakelite Panel Fuse Base

Cái glass fuse holder panel mount for 5x20mm cartridge fuses is a classic panel-installed circuit protection component for low-voltage electrical systems. This glass fuse holder panel mount adopts high-temperature black bakelite insulating base paired with 0.5mm phosphor bronze conductive terminals, delivering reliable insulation performance, stable contact and durable overcurrent protection for AC and DC circuits. With standard panel cutout design and flame retardant bakelite housing, it is widely used in industrial control equipment, household appliances, power supplies and instrumentation front panels.

Core Product Features

• Compatible with standard 5×20mm glass and ceramic cartridge fuses, covers mainstream low-voltage protection specifications
• Rated 10A at 250V/125V AC/DC, wide voltage compatibility, strong versatility across different application scenarios
• Black bakelite (phenolic resin) housing, UL94 V0 flame retardant grade, excellent high-temperature resistance and arc suppression performance
• 0.5mm thick phosphor bronze terminals, high elasticity, stable clamping force, contact resistance below 5mΩ
• 3000V AC power frequency withstand voltage, insulation resistance above 100MΩ, high operational safety
• 50A breaking capacity, effectively interrupts fault current to protect downstream electrical components
• Threaded panel mount structure, standard cutout size, easy front-panel fuse replacement without opening enclosure
• Fully RoHS compliant, meets global electronics safety and environmental protection requirements

Compared with PCB mount fuse holders, this panel type model provides more flexible installation positions and easier daily maintenance. Its bakelite housing has outstanding thermal stability and arc resistance, making it a standard protection solution for low-voltage control circuits and bench-top power supply units.

Full Technical Specifications

Selection & Application Guidance

When selecting a glass fuse holder panel mount, first confirm the fuse size, system rated voltage and operating current. 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 equipment requiring front-panel fuse replacement, panel mount models are the preferred choice as they allow quick fuse replacement without opening the equipment enclosure. For flame retardant and insulation-sensitive scenarios, prioritize products with UL94 V0 grade housing and high insulation resistance to ensure operational safety. Verify that the panel cutout matches the standard mounting size to ensure firm installation and stable contact performance.

Typical Application Scenarios

• Industrial control panels and small automation equipment circuits
• Household appliances and small electrical equipment power protection
• Test instruments and laboratory power supply circuits
• Switching power supplies, adapters and power distribution units
• Communication equipment and network terminal power protection
• LED lighting drivers and low-voltage power modules
• Medical equipment auxiliary circuits and low-voltage 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 tighten the fixing nut from the back 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.

R3-11A-Panel-fuse-holder

Frequently Asked Questions

Q1: What fuse size does this glass fuse holder panel mount 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 supports 250V and 125V for both AC and DC, covering most low-voltage electrical equipment protection scenarios.

Q3: What material is the housing made of?

A3: The housing is made of black bakelite (phenolic resin) with UL94 V0 flame retardant grade, featuring excellent high-temperature resistance, arc suppression and insulation performance.

Q4: What is the withstand voltage and insulation resistance?

A4: It supports 3000V AC power frequency withstand voltage, with insulation resistance above 100MΩ, providing high insulation strength and operational safety for low-voltage circuits.

Q5: What material are the conductive terminals made of?

A5: The terminals are made of 0.5mm thick phosphor bronze, with high elasticity, contact resistance below 5mΩ, and stable clamping force after long-term use and multiple fuse replacements.

Q6: What mounting method does it adopt?

A6: It adopts panel mount design with threaded nut fixing structure, which can be directly installed on equipment front panels and control cabinet surfaces, with firm installation and convenient daily maintenance.

Q7: What are the main application fields?

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