Littelfuse 0318.300VXP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318.300VXP is a 300 mA, 250 V AC/DC fast-blow glass cartridge fuse with 3AB/3AG package configuration. This through-hole fuse is designed for circuit protection in applications requiring fast response characteristics. The part maintains active product status with full regulatory compliance (CE, CSA, UL). Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, ensuring direct functional replacement without circuit redesign.

Substiute Parts

0318.300VXP

Littelfuse Inc.In Stock: 9470318.300VXP Datasheet

Current PartRFQ

BK/AGC-V-3/10-R

Eaton - Electronics DivisionIn Stock: 1012BK/AGC-V-3/10-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The Eaton BK/AGC-V-3/10-R qualifies as a direct substitute for the Littelfuse 0318.300VXP based on the following alignment of critical parameters:

• Current Rating: Both parts rated at 300 mA
• Voltage Rating (AC): Both rated at 250 V
• Response Time: Both classified as Fast Blow
• Fuse Type: Both are Glass Cartridge types
• Package / Case: Both use 3AB, 3AG, 1/4" x 1-1/4" (Axial) configuration
• Mounting Type: Both are Through Hole
• Breaking Capacity: Both rated at 35 A @ rated voltage
• Operating Temperature: Both operate across -55°C ~ 125°C
• Regulatory Compliance: Both hold CSA and UL approvals

Physical dimensions remain within acceptable tolerance for mechanical interchangeability in standard fuse holders.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 0318.300VXP and Eaton BK/AGC-V-3/10-R maintain active product status with established regulatory approvals (CSA, UL). The Littelfuse part carries additional CE certification. Both parts satisfy RoHS compliance requirements. Selection between these parts depends on supply chain availability and inventory status. The Eaton substitute is suitable for direct replacement in applications where the 300 mA, 250 V AC/DC fast-blow protection requirement is specified, provided the fuse holder accommodates the minor dimensional variations noted in the parameter comparison table.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/AGC-V-3/10-R replace the Littelfuse 0318.300VXP in existing designs?

A: Yes. Both parts share identical electrical ratings (300 mA, 250 V AC/DC, Fast Blow), fuse type (Glass Cartridge), package configuration (3AB, 3AG), and breaking capacity (35 A). Physical dimensions are within acceptable tolerance for standard 3AG fuse holders.

Q: What are the key parameters that determine substitutability for this fuse category?

A: Current rating, voltage rating, response time classification, fuse type, package/case designation, breaking capacity, and mounting type are the primary parameters. All of these align between the main part and substitute.

Q: Are there differences in regulatory compliance between these parts?

A: The Littelfuse part carries CE, CSA, and UL approvals. The Eaton part carries CSA and UL approvals. Both meet RoHS compliance standards. Applications requiring CE certification should retain the Littelfuse part.

Q: Do the dimensional differences affect mechanical compatibility?

A: The diameter difference (0.275" vs 0.266") and length difference (1.288" vs 1.292") are minor. Both parts fit standard 3AG fuse holders. Verify fuse holder specifications if tight mechanical tolerances are critical to the application.

Q: How do the melting I²t and DC cold resistance values differ?

A: The Eaton part has lower melting I²t (0.027 vs 0.0689) and lower DC cold resistance (1.084 vs 1.405 Ohms). These differences reflect manufacturing variations between suppliers but do not affect the fast-blow response classification or protection function at the rated 300 mA current level.