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Cartridge fuses are essential safety devices that protect electrical circuits from overcurrents and short circuits. Selecting the correct fuse rating and type is crucial for preventing damage to appliances and wiring, and most importantly, for ensuring electrical safety in your home or workshop. This guide will help you navigate the options and make an informed decision.
Includes 25 Pcs Female Micro Slow-Blow MAXI Fuse, 5 fuses of each amp rating: 15amp, 20amp,25amp,30amp,40amp FMM fuses.
Meets the latest demand for smaller (0.59 inches tall), high current circuit protection products being found on new model vehicles.
Industry standard color-coding indicates amp rating.
Newest, most comprehensive circuit protection assortment available to the aftermarket.
Standard Fuse Assortment Kit as your automotive wiring and electrical equipment safety solution; Protects your vehicle and electrical devices from a short circuit or overload.
Material: Made of copper and plastic, it has good electrical conductivity, corrosion resistance, flame retardancy and long service life
Easy to identify: Each fuse can be easily identified by its color-coded plastic casing and rated current engraved on the top
Easy to keep: The fuse is packed in a sturdy plastic box, which makes the fuse orderly and convenient for you to store and use
Applicaiton: Car fuse can be widely used in RVs, trucks, cars and SUVs. It is recommended to check the correct size of car fuses before buying
Package Includes: Includes 36pcs low profile fuses, Fuses in 6 different colors, Blue 20A x 6pcs, Pink 30A x 6pcs, Green 40A x 6pcs, Red 50A x 6pcs, Yellow 60A x 6pcs, Black 80A x 6pcs
Each fuse is clearly marked with amperage and color coded for easy identification
Includes 50 MCASE mini fuses, 10 fuses of each amp rating: 15, 20, 25, 30, and 40 amperes.
Smaller than J-Case box fuses - SEE DIMENSIONS picture. These are a mini version of the more common JCASE cartridge fuses.
Commonly used in truck fuse boxes, along with other makes, for various automotive systems.
Standard Fuse Assortment Kit as your automotive wiring and electrical equipment safety solution; Protects your vehicle and electrical devices from a short circuit or overload.
【2 JCASE PROFILES IN ONE KIT】This 40-piece automotive fuse kit includes Tall/Standard JCASE and Low Profile JCASE fuses for compatible vehicle electrical systems. Not compatible with MAXI, MCASE, MIDI, MEGA or standard blade fuse slots.
【5 AMP RATINGS FOR EACH PROFILE】Both JCASE profiles include 20A, 30A, 40A, 50A and 60A ratings, providing multiple replacement options for vehicles and equipment originally using these cartridge fuse types.
【4 OF EACH PROFILE & RATING】Includes 4 pieces of every profile and amp combination: 20 Tall/Standard JCASE fuses and 20 Low Profile JCASE fuses, for a total of 40 pieces suitable for long-term spare storage.
【CHECK PROFILE & AMP RATING】Tall/Standard and Low Profile JCASE fuses have different physical shapes and should not be selected by color alone. Compare the profile, amperage marking and original fuse specifications before installation.
【MATCH THE ORIGINAL FUSE】Check the vehicle owner’s manual, fuse box cover or original fuse before replacement. Use only the same JCASE profile and amperage rating, and never install a higher-rated fuse. If the replacement fuse blows repeatedly, stop...
With these standard fuse scan be a solution of your automotive wiring and electrical equipment safety, protect your vehicle and electrical devices from a short circuit or overload.
Heavy-duty, dual element, time-delay cartridge fuse for motor and main panel protection.
Helps protect motors against burnout from single-phasing on three-phase systems, and overloads
Dual-element fuses can be applied in circuits subject to temporary motor overloads and surge currents to provide both high performance short-circuit and overload protection
Use general purpose NON fuses for lighting or electric heating circuits.
Provides motor overload, ground fault and short-circuit protection
Helps protect motors against burnout from overloads and from single phasing on three phase systems
Simplifies and improves blackout prevention (selective coordination)
Can be applied in circuits subject to temporary motor overloads and surge currents to provide high performance short-circuit and overload protection
Protects against low level overcurrent of overloads and will hold on inrush current 5 times greater than the amp rating of fuse for a min of 8 sec
Package Includes: This JCASE Fuses Assortment Kit includes 36pcs low profile fuses, 6 different colors of fuses. The rating of each fuse is blue 20A x 6pcs, pink 30A x 6pcs, green 40A x 6pcs, red 50A x 6pcs, yellow 60A x 6pcs, black 80A x 6pcs
Premium Material: The Low Profile Fuse is made of high quality copper and plastic, good conductivity and flame retardant. Compared with others, it features safer and more durable
Easy to Identify: Each fuse can be easily identified by their color-coded plastic housings and the carved amp rating figures on the top. The visual and removable cover makes it convenient for you to check
Easy to Carry & Store: All the fuses are sorted and put in a package, super easy for you to carry and store
Great Compatibility: Joinfworld JCASE Fuse can be widely used in cars, trucks, SUVs, homes, boats, RV, ATV, UTV, golf carts, and more electronic equipment. For any problems, please do not hesitate to write to us
Last update on 2026-09-09 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Cartridge Fuses
Understanding Fuse Types
Glass Fuses: Common in electronics and smaller appliances, these offer visible indication of a blown fuse. They are generally less robust than ceramic options.
Ceramic Fuses: More durable and better at handling higher temperatures and surges, ceramic fuses are ideal for industrial applications, automotive systems, and higher-power devices.
Fast-Acting vs. Time-Delay: Fast-acting fuses interrupt the circuit immediately upon detecting an overcurrent. Time-delay fuses (also known as slow-blow) can tolerate brief surge currents, making them suitable for motors or transformers that draw extra power on startup.
Key Specifications to Consider
Amperage Rating: This indicates the maximum current the fuse can handle before blowing. It should be matched to the circuit's expected load, never exceeding the wire's capacity.
Voltage Rating: The fuse's voltage rating must be equal to or greater than the circuit's operating voltage. Using a fuse with a lower voltage rating can be dangerous.
Interrupting Rating (AIC): This is the maximum fault current the fuse can safely interrupt without causing damage. Higher AIC ratings are generally safer for high-power circuits.
Size and Form Factor: Cartridge fuses come in various standard sizes (e.g., 5x20mm, 6x32mm, 1/4" x 1 1/4"). Ensure the replacement fuse matches the physical dimensions of the original.
Where to Find Fuse Information
Appliance Manuals: The most reliable source for fuse specifications is the owner's manual for the device you are protecting.
Existing Fuse: The amperage, voltage, and type are usually printed directly on the fuse body. Always replace with an identical or equivalent fuse.
Circuit Breaker Panel: For home wiring, circuit breaker ratings can sometimes guide fuse selection, but always defer to appliance-specific documentation.
Comparison Tips
When replacing a fuse, always use one with the exact same amperage and voltage rating.
For devices with high inrush currents (like motors), opt for a time-delay fuse if the original was a time-delay type.
If unsure, consult a qualified electrician to determine the correct fuse specifications for your application.
Frequently Asked Questions
What is the difference between fast-acting and time-delay fuses?
Fast-acting fuses blow instantly when an overcurrent is detected, protecting sensitive electronics. Time-delay fuses are designed to withstand temporary surges, such as those from motor startup, before blowing.
Can I use a fuse with a higher amperage rating than the original?
No, you should never use a fuse with a higher amperage rating. This could lead to overheating wires and potential fire hazards, as the fuse would not protect the circuit adequately.
What does the voltage rating on a fuse mean?
The voltage rating indicates the maximum voltage the fuse can safely handle without arcing after it blows. It must be equal to or greater than the circuit's operating voltage.
How do I know what size fuse I need?
Fuse sizes are standardized physical dimensions. You can often find the required size on the old fuse, in the appliance's manual, or by measuring the fuse holder.
What is an interrupting rating (AIC)?
The interrupting rating (also known as AIC or Breaking Capacity) is the maximum fault current a fuse can safely interrupt. A higher AIC is generally recommended for circuits with a higher potential fault current.
Are glass fuses less safe than ceramic fuses?
Glass fuses are typically used in lower-power applications and can be more fragile. Ceramic fuses are generally more robust, handle higher temperatures better, and are preferred for higher-power or high-vibration environments.
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