Bussmann NO.663 Fuse Reducer

Bussmann NO.663 Fuse Reducer

The Bussmann NO.663 Fuse Reducer is an essential electrical adapter designed to safely convert a standard ATO/ATC (large-blade) fuse holder to accommodate a smaller ATM (mini-blade) fuse. Crafted for versatility and reliability in automotive, marine, or industrial applications, this red-colored adapter ensures seamless compatibility between differing fuse sizes without compromising circuit protection.

Key Features:

• Universal Adaptation: Converts larger ATO/ATC fuse slots (typically 5.1mm x 18.1mm) to fit mini ATM fuses (3.1mm x 11.2mm).
• Robust Construction: Made from heat-resistant, flame-retardant materials for durability and safety under high-temperature conditions.
• Easy Installation: Plug-and-play design—simply insert the reducer into the existing ATO slot, then secure the ATM fuse into the adapter.
• Error Prevention: Bright red casing provides visual distinction to prevent accidental mismatching of fuse types.
• Maintains Circuit Integrity: Ensures consistent electrical contact and reliable current flow while preserving the fuse’s protective function.

Ideal For:

• Retrofitting modern mini fuses into older vehicles or equipment with legacy ATO fuse boxes.
• Emergency repairs when only mini fuses are available.
• Optimizing space in crowded fuse panels or custom electrical setups.

Note: Always verify the reducer’s compatibility with your fuse panel and use fuses rated for the specific circuit requirements. The NO.663 is backed by Bussmann’s reputation for engineered safety in overcurrent protection.

Simplify your electrical upgrades and repairs—reduce adapt, and protect with precision.