Fuse Holder-Fuse Blocks, Fuse Holders, And Fuse Accessories

What Is a Fuse Holder?

A fuse holder is a standard electronic and electrical component used to install, secure, and protect fuses while providing a reliable electrical connection. It is an essential part of circuit overcurrent protection systems.

Fuse holder for circuit protection applications

Core Functions of a Fuse Holder

Mechanical Retention: Securely clamps the fuse to prevent loosening or falling out.
Electrical Connection: Internal metal contacts or terminals provide a low-resistance path, connecting the fuse to the circuit.
Safety Insulation: The housing, such as plastic, bakelite, or ceramic, isolates live parts to help prevent electric shock, dust ingress, and short circuits.
Easy Maintenance: Allows for quick insertion, removal, and replacement of fuses without soldering.

Fuse Holder Types by Installation Method

1. PCB Solder-Mount Fuse Holder
Vertical or horizontal insertion types are soldered directly onto the PCB and are commonly compatible with 5×20mm and 6×30mm glass or ceramic fuse tubes. Surface-mount versions are ultra-thin and compact for high-density boards.

PCB Solder-Mount Fuse Holder

2. Panel-Mount Fuse Holder
Threaded versions use a nut for installation from the outside of the panel and may include a dust cover. Snap-in versions are secured by a latch and do not require a nut.

Panel-Mounted Fuse Holders

3. Lead-Wired Fuse Holder
This type features pre-soldered wires or terminals for direct insertion into circuits. Common examples include fuse holders with wires and automotive blade-type fuse holders.

4. DIN-Rail Mounted Fuse Holder
Compatible with DIN 35mm standard rails, these are commonly used in industrial control cabinets, distribution boxes, and PLC cabinets.

DIN-Rail Fuse Holders

5. Automotive Blade-Type Fuse Holder
Compatible with small, medium, and large automotive blade fuses.

Automotive Blade-Type Fuse Holders

Fuse Holders by Fuse Type

Tube-Type Holders: Compatible with 5×20mm and 6×30mm cylindrical glass or ceramic tube fuses.
Blade-Type Holders: Compatible with automotive and power supply flat blade fuses.
Square or Blade-Contact Fuse Holders: Used in industrial high-power applications such as RT18 and NT series.

Common Fuse Holder Specifications

5×20mm: One of the most versatile sizes for home appliances, power supplies, industrial control, and small appliances.
6×30mm: Commonly used for higher current or higher voltage applications.
10×38mm: Suitable for high-power equipment.
Automotive: Small blade (Mini), medium blade (ATO/ATC), and large blade (Maxi).

Materials Used in Fuse Holders

Housing Materials: Bakelite, Nylon / PA66, PBT, and ceramic.
Contact Springs: Tin-plated brass or nickel-plated metal for low resistance and oxidation resistance.

How to Select the Right Fuse Holder

Fuse Size: The holder must match the fuse size exactly.
Rated Current and Voltage: The holder rating should be equal to or greater than the fuse rating.
Installation Space: Choose PCB, panel, DIN rail, or wire harness style based on the application.
Environment: Consider temperature, dust protection, water resistance, and flame-retardant requirements.
Certifications: Common requirements include UL, VDE, CSA, and RoHS.

Blade Fuse Holder

Blade fuse holders, also called blade-type fuse holders, are sockets designed specifically for flat blade fuses. They are widely used in automotive, marine, new energy, and aftermarket circuit applications, and are among the most common overcurrent protection components in low-voltage DC systems.

Blade fuse holder for automotive and low-voltage DC applications

Blade Fuse Holder Classification by Fuse Size

The fuse model must be matched correctly because holders are not interchangeable.

1. Medium ATC / ATO
Dimensions: 19.1 × 5.1 × 18.5 mm
Current: 1A to 40A
Voltage: 32V DC
Applications: Original automotive fuse boxes, aftermarket wiring harnesses, power supplies, and marine systems.

2. Small MINI / ATM
Dimensions: 10.9 × 5.1 × 16.3 mm
Current: 2A to 30A
Applications: Passenger cars, new energy vehicles, onboard PCB designs, and compact installations.

ATM Blade Fuses

3. Low-Profile MINI
Applications: High-end vehicles and ultra-thin equipment.

4. MAX
Current: 30A to 80A+
Applications: Batteries, high-current main lines, RVs, trucks, and inverters.

5. Micro 2 / Micro 3
Pins: 2-pin / 3-pin
Applications: New German and Japanese vehicle models and new energy vehicles.

Blade Fuse Holder Types by Installation Structure

1. Inline Fuse Holder
Usually pre-wired with 12–18 AWG silicone or copper wire. Waterproof versions may include an IP67 sealed cover with rubber gasket for engine compartments and outdoor use. These are easy to insert directly into wiring systems without soldering or drilling.

2. PCB Solder-Mount Type
Through-hole or surface-mount pins. Common materials include PA66 or PA9T flame-retardant housings and tin-plated brass contacts. Typical applications include vehicle power supplies, DC-DC converters, charging stations, and industrial control boards.

3. Panel Mount Type
Includes screw-mount or snap-in structures, often with a dust cover. Used in equipment panels, distribution boxes, and modified dashboards.

4. Fuse Block / Multi-Circuit Fuse Holder
Multi-circuit configurations include 4, 6, 8, 10, and 12 circuits. Busbar structures may use common negative or positive layouts. These are widely used in RVs, yachts, and centralized power systems in modified vehicles.

5. Power Tap / Add-A-Circuit
A non-invasive power tapping solution that does not damage the original vehicle wiring. Commonly used for dashcams, ambient lighting, and aftermarket power accessories.

Automotive Blade Fuse Power Tap

Main Specifications of Blade Fuse Holders

Rated Voltage: 32V DC automotive grade; some versions support 58V or 125V DC.
Rated Current:
MINI: up to 30A
ATC: up to 40A
MAX: up to 80A
Contact Material: H62/H65 tin-plated or nickel-plated brass.
Housing: PA66, PA9T, Santoprene TPV, UL94 V0 flame-retardant.
Waterproof Rating: Standard IP20; waterproof versions up to IP67.
Operating Temperature: -40°C to +125°C.

Blade Fuse Holder Selection Guide

Fuse Type Matching: MINI, ATC, and MAX holders are not interchangeable.
Current and Voltage: Socket rating should be equal to or higher than the fuse rating.
Environment: Use standard models for indoor or cockpit applications and IP67 waterproof models for engine compartments or outdoor environments.
Installation Method: Choose wire-to-wire, PCB soldering, or panel mounting according to the design.
Certifications: UL, SAE, ISO 8820, and RoHS are commonly required for automotive applications.

Fuse Blocks, Fuse Holders and Fuse Accessories

Fuse blocks, fuse holders and fuse accessories

Fuse Holders

By Fuse Type
Glass and ceramic tube fuse holders
5×20mm fuse holders
6×30mm fuse holders
10×38mm high-power fuse holders
Blade-type or plug-type fuse holders for automotive and new energy use
MINI, ATC/ATO, Low-Profile, MAX, Micro 2, and Micro 3
Industrial fuse holders such as RT18, RT19, and RT14 series
DIN-rail fuse holders

By Mounting Method
PCB solder-mount including through-hole and surface-mount
Panel mount including threaded and snap-in
Lead-wired and inline fuse holders including waterproof types
DIN rail mount (DIN35)
Multi-circuit fuse boxes and busbar types

By Protection Rating
Standard IP20
Waterproof IP67 or IP54
Dust-proof and splash-proof types

Fuse Holder Accessories

Structural Accessories
Fuse covers, dust covers, and waterproof covers
Mounting nuts, washers, and O-rings
Mounting brackets, clips, and DIN rail clips
Terminal blocks, crimp terminals, and spring clips
Electrical Accessories
Add-a-circuit adapters
Fuse extractors and pliers
Busbars, copper bars, and parallel terminals
Fuse indicator strips with LED alarm
Wires and Harnesses
Pre-wired fuse holder harnesses
High-temperature silicone wires
Harness sleeves and heat-shrink tubing

Related Fuse Products

Glass-tube fuses
Ceramic-tube fuses
Automotive blade fuses including MINI, ATC, and MAX
Slow-blow and fast-blow fuses
High-voltage fuses and DC fuses

Suggested Product Series Titles

Fuse Holder Series
Blade-Type Fuse Holder Series
Automotive Waterproof Fuse Holder Series
Industrial DIN-Rail Fuse Holder Series
PCB-Mounted Fuse Holder Series
Fuses and Accessories
Fuse Accessories including covers, nuts, removers, and extractors
Multi-Circuit Fuse Boxes and Busbar Systems

How Cartridge Fuses and Fuse Holders Are Classified

Classification Criteria for Cartridge Fuses

Cartridge fuses are commonly classified according to the following key criteria:

Dimensions: 5×20mm, 6×30mm, 10×38mm, and other sizes such as 8.5×31.5mm.
Housing Material: Glass-tube fuses and ceramic-tube fuses.
Breaking Characteristics / Fusing Speed: Fast-acting F, time-delay T, extra-slow-blow TT, and medium-speed M.
Rated Voltage: 125V, 250V, 400V, and 500V industrial versions.
Rated Current: Typically 0.1A to 50A depending on size and specification.
Certification Standards: IEC 60127, UL 248, and VDE.

Classification Criteria for Fuse Holders

Fuse holders are commonly classified according to the following factors:

Compatible Fuse Type: Tube-type fuse holders (5×20, 6×30, 10×38), blade-type fuse holders (MINI, ATC, MAX), and industrial fuse holders.
Mounting Method: PCB solder-mount, panel-mount, lead-wired or inline, and DIN rail mount (35mm).
Electrical Configuration: Single-pole, double-pole, and multi-circuit or busbar types.
Protection Rating: Standard IP20, waterproof IP54 or IP67, and dust/splash-proof versions. Related circuit protection products can be found here: Circuit Protection.
Structural Features: Horizontal, vertical, with cover, without cover, with indicator light, or without indicator light.

Common Industry Classification Logic

Tube Fuses: Size → Material → Fusing Speed → Voltage and Current
Fuse Holders: Compatible Fuse Type → Mounting Method → Structural Features

This is one of the most widely used classification logics in the electronic components industry and can be applied directly to product catalogs, BOMs, store navigation, and technical manuals.

Frequently Asked Questions About Fuse Holders

1. What is a fuse holder used for?

A fuse holder is used to install, secure, and connect a fuse in an electrical circuit. It helps protect the fuse, provides reliable electrical contact, and makes fuse replacement easier during maintenance.

2. What are the main types of fuse holders?

The main types of fuse holders include PCB solder-mount fuse holders, panel-mount fuse holders, inline or lead-wired fuse holders, DIN-rail fuse holders, and automotive blade fuse holders. They are selected according to fuse type, mounting method, and application environment.

3. What is the difference between a fuse holder and a fuse block?

A fuse holder usually holds a single fuse, while a fuse block is designed to hold multiple fuses in one assembly. Fuse blocks are often used for centralized circuit protection in vehicles, marine systems, RVs, and industrial equipment.

4. How do I choose the right fuse holder?

You should choose a fuse holder based on the fuse size, rated current, rated voltage, installation method, and environmental requirements. The holder must match the fuse type exactly, and its electrical rating should be equal to or greater than the fuse rating.

5. Are blade fuse holders interchangeable?

No. Blade fuse holders are not interchangeable across different fuse sizes. MINI, ATC/ATO, MAX, Micro 2, and Micro 3 fuse holders must be matched strictly to the corresponding fuse type.

6. What are common fuse holder sizes?

Common fuse holder sizes include 5×20mm, 6×30mm, and 10×38mm for cartridge fuses, as well as MINI, ATC/ATO, and MAX for automotive blade fuses. The correct holder size depends on the fuse specification used in the circuit.

7. When should I use a waterproof fuse holder?

A waterproof fuse holder should be used in engine compartments, outdoor installations, marine applications, and any environment exposed to moisture, dust, or splashing water. IP67-rated fuse holders are commonly used for these conditions.

8. What materials are commonly used in fuse holders?

Fuse holder housings are commonly made from bakelite, nylon, PA66, PBT, or ceramic. Contact materials are usually tin-plated or nickel-plated brass to provide low resistance and good corrosion resistance.