Professional Fuse Kit (ATC)
$44.99
per EACH (USD)- Genuine Littelfuse® Manufacture: OEM-grade accuracy ensures consistent, predictable trip points and zero circuit degradation.
- Universal Standard Footprint: Fully cross-compatible with all automotive fuse blocks, holders, and power distribution modules requiring standard ATC or ATO blade fuses.
- Heavy-Duty Plano® Pro-Latch Case: Packed in a quality USA-made Plano® organizing case equipped with a lid color legend for rapid amperage identification.
- Comprehensive 192-Piece Assortment: Complete coverage from 1 Amp through 40 Amp ratings for both low-current signal lines and high-draw accessory circuits.
Recommended for all standard automotive, marine, and commercial power distribution applications requiring standard blade fuses, including:
- Main & Auxiliary Fuel Pump Circuits
- Electric Water Pumps & Cooling Fans
- High-Output Ignition & Engine Management Systems
- Commercial Lighting & Precision Electronics
Low Amperage (1A - 7.5A)
- 12 × 1 Amp Fuse (Black)
- 12 × 2 Amp Fuse (Gray)
- 12 × 3 Amp Fuse (Violet)
- 12 × 4 Amp Fuse (Pink)
- 12 × 5 Amp Fuse (Tan)
- 12 × 7.5 Amp Fuse (Brown)
Standard Amperage (10A - 30A)
- 20 × 10 Amp Fuse (Red)
- 20 × 15 Amp Fuse (Blue)
- 20 × 20 Amp Fuse (Yellow)
- 20 × 25 Amp Fuse (Clear)
- 20 × 30 Amp Fuse (Green)
High Amperage (35A - 40A)
- 10 × 35 Amp Fuse (Blue-Green)
- 10 × 40 Amp Fuse (Amber)
Technical Notes & Environmental Protection
Standard Blade Terminology (ATC vs. ATO):
ATC (Automotive Technology Closed) and ATO (Automotive Technology Open) are industry-interchangeable designations for standard-sized automotive blade fuses. They share identical physical dimensions, blade spacing, and current-rating color codes. Littelfuse utilizes shared high-precision mold tooling across its standard blade product lines (including Series 257 and modern ISO 8820-3 compliant 287/ATOF series), which carry hard-tooled "257" identification stamps on current-production stock.
Environmental Protection & Weatherproofing Best Practices:
In high-humidity environments or vehicles stored long-term, potential corrosion occurs where the metal terminal blades insert into the socket clips (regardless of whether the plastic housing bottom is open or closed). Protection varies by environmental demands:
- Standard Vehicle Installations: Most OEM fuse blocks feature covered or shrouded plastic housings designed to shield against indirect splashes and road debris.
- Unsealed / High-Humidity Storage: For unsealed fuse holders or vehicles sitting in damp environments, applying a light coating of dielectric silicone grease directly to the fuse blades forms an airtight seal at the contact points to eliminate terminal corrosion.
- Severe-Duty / Exposed Installations: For extreme environments or open engine bays, upgrade to a fully weather-sealed Power Distribution Module (PDM) equipped with a silicone cover gasket and individual silicone wire cable seals for total environmental isolation.
