Littelfuse 0318003.VXP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0318003.VXP is a 3 A, 250 V AC/DC fast-blow glass cartridge fuse with 3AB/3AG package configuration. This through-hole fuse is designed for circuit protection in industrial and commercial applications requiring reliable overcurrent interruption. The part maintains active product status with full compliance to international safety standards including UL, CSA, CE, KC, and PSE certifications. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

0318003.VXP

Littelfuse Inc.In Stock: 8600318003.VXP Datasheet

Current PartRFQ

BK/AGC-V-3-R

Eaton - Electronics DivisionIn Stock: 796BK/AGC-V-3-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0318003.VXP with the Eaton BK/AGC-V-3-R is based on strict equivalence of the following critical parameters:

• Current Rating: Both parts rated at 3 A
• Voltage Rating (AC): Both rated at 250 V
• Response Time: Both classified as fast-blow
• Fuse Type: Both are glass cartridge fuses
• Package Configuration: Both use 3AB/3AG package with 1/4" x 1-1/4" (Axial) dimensions
• Mounting Type: Both are through-hole mounted
• Breaking Capacity: Both rated at 100 A @ rated voltage
• Operating Temperature: Both operate across -55°C ~ 125°C range
• Regulatory Compliance: Both hold UL and CSA certifications

These parameters define the functional and mechanical interchangeability required for direct substitution in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 0318003.VXP and Eaton BK/AGC-V-3-R maintain active product status and hold current regulatory certifications from UL and CSA, the primary approval agencies for North American applications. The Littelfuse part carries additional certifications (CE, KC, PSE), providing broader international compliance coverage. Both parts are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

The dimensional tolerances between the two parts are within acceptable mechanical limits for standard 3AB/3AG fuse holders. The difference in melting I²t values (14 versus 45.9) reflects different thermal response characteristics within the fast-blow classification; both values remain within the fast-blow specification range. The DC cold resistance differential (0.0427 Ohms versus 0.035 Ohms) is negligible for circuit protection applications.

Selection between these parts should be based on supply availability, procurement lead times, and specific regional compliance requirements. The Littelfuse part is preferred for applications requiring CE, KC, or PSE certifications.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/AGC-V-3-R directly replace the Littelfuse 0318003.VXP in existing designs?

A: Yes. Both parts share identical current rating (3 A), voltage rating (250 V AC), response time (fast-blow), package configuration (3AB/3AG), and breaking capacity (100 A). The mechanical dimensions are within acceptable tolerance for standard fuse holders. Both hold UL and CSA certifications.

Q: What is the significance of the different melting I²t values?

A: The melting I²t value indicates the thermal energy required to melt the fuse element. The Littelfuse part (I²t = 14) melts at lower thermal energy compared to the Eaton part (I²t = 45.9). Both values fall within the fast-blow classification. Application-specific thermal requirements should determine selection if precise I²t matching is necessary.

Q: Are there dimensional compatibility concerns?

A: The Littelfuse part measures 0.275" diameter × 1.288" length, while the Eaton part measures 0.266" diameter × 1.292" length. These differences are within standard mechanical tolerances for 3AB/3AG fuse holders and do not prevent interchangeability in typical applications.

Q: Which part should be selected for international applications?

A: The Littelfuse 0318003.VXP carries CE, KC, and PSE certifications in addition to UL and CSA, making it suitable for European, Korean, and Japanese markets. The Eaton part holds UL and CSA certifications, suitable for North American applications.

Q: Is the DC cold resistance difference significant?

A: The difference between 0.0427 Ohms and 0.035 Ohms is negligible for circuit protection applications and does not affect functional interchangeability.