FiveEyes FMM/MCASE Micro Cartridge Fuse Assortment 30-Piece (15–40A) Slow-Blow, Color-Coded

FiveEyes Mcase FMM 30-piece micro cartridge fuse assortment supplies reliable slow-blow circuit protection for modern vehicles and electronics.

This compact kit contains six fuses at each common rating (15A, 20A, 25A, 30A, 40A) in the FMM/MCASE micro cartridge format used by many newer cars, trucks and aftermarket devices. The set is designed to meet the trend toward smaller, higher-current fuse packages found on recent vehicle models, and the industry-standard color coding makes it quick to pick the right fuse in a roadside or garage repair situation.

How do I know these fuses fit my vehicle?

FMM (MCASE) micro cartridge fuses are specified for many newer Ford-family models and other makes using the mini box-shaped cartridge standard. Check your vehicle’s owner manual or the fuse box cover for a matching FMM/MCASE designation and amp rating before replacing a fuse.

• Includes six of each amp rating: 15A, 20A, 25A, 30A, 40A.
• Fits vehicles listing MCASE, FMM or micro cartridge fuse types.
• Color-coded bodies speed correct selection and reduce mistakes.

What does “slow-blow” mean and when should I use it?

Slow-blow fuses tolerate brief current spikes without opening, making them suitable for circuits with motors, pumps, or devices that draw a short surge on startup. They protect against sustained overloads while avoiding nuisance failures from harmless inrush currents.

• Best for circuits with short startup surges like blower motors or power windows.
• Prevents unnecessary blowouts from harmless transient spikes.
• Provides stable protection for sensitive accessories and aftermarket electronics.

How does this kit save time and money compared with single fuses?

Buying a multi-pack ensures you have the most commonly needed ratings on hand instead of running to a store for a single replacement. The assortment is priced lower per fuse than typical retail automotive counters and reduces downtime during roadside repairs.

• Thirty fuses cover a wide range of common circuit ratings.
• Lower cost per unit than individual retail fuses.
• Helps avoid emergency trips to parts stores for single replacements.

How should I store and install these micro cartridge fuses?

Keep the fuses in a dry, organized container to prevent corrosion and to quickly identify ratings by color. When installing, always replace a blown fuse with the same amp rating and type; if unsure, consult a vehicle wiring diagram or a qualified technician.

• Store in a clean, dry toolbox or labeled compartment.
• Replace only with identical amp and FMM/MCASE type fuses.
• If replacements blow repeatedly, seek professional electrical diagnosis.

Who is this for? The FiveEyes Mcase FMM 30-piece kit suits DIYers, professional mechanics, and fleet technicians who work on newer vehicles that use micro cartridge fuses. It’s ideal for anyone who wants a complete, color-coded selection of slow-blow FMM fuses for on-road repairs, garage maintenance, or outfitting a service kit for trucks and cars.