Littelfuse 0257030.L Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0257030.L is a 30A 32VDC automotive blade fuse designed for ATO/ATC holder applications. This fuse is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and component replacement. The part delivers fast-blow response characteristics with a breaking capacity of 1kA at rated voltage, suitable for automotive electrical protection circuits requiring rapid fault isolation.

Substiute Parts

0257030.L

Littelfuse Inc.In Stock: 9230257030.L Datasheet

Current PartRFQ

0287030.PXCN

Littelfuse Inc.In Stock: 601350287030.PXCN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0257030.L is determined by strict equivalence across the following critical parameters:

• Current Rating: 30 A (exact match required)
• Voltage Rating - DC: 32 V (exact match required)
• Package / Case: Blade, ATO/ATC (exact match required)
• Fuse Type: Automotive (exact match required)
• Melting I²t: 1510 (exact match required)
• DC Cold Resistance: 0.00197 Ohms (exact match required)
• Operating Temperature Range: -40°C to 105°C (exact match required)

The Littelfuse 0287030.PXCN meets all substitution criteria as a direct equivalent. Both parts share identical electrical characteristics, thermal performance, and mechanical compatibility with standard ATO/ATC fuse holders.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0287030.PXCN is the direct substitute for the obsolete 0257030.L. Selection is based on the following engineering criteria:

• Electrical equivalence: Both parts maintain identical current rating (30 A), voltage rating (32 V DC), and melting I²t (1510), ensuring identical circuit protection performance.
• Mechanical compatibility: Both parts use the Blade, ATO/ATC package format, providing direct physical compatibility with existing fuse holders without modification.
• Thermal performance: Operating temperature range of -40°C to 105°C is identical, confirming suitability for equivalent environmental conditions.
• Regulatory compliance: The substitute part carries active product status with CSA and UL approvals, providing current certification support. The original part's cULus approval is superseded by the substitute's broader certification portfolio.
• RoHS compliance: Both parts meet ROHS3 requirements, supporting environmental and regulatory mandates.

The 0287030.PXCN is available in bulk packaging with substantial inventory (60,100 pcs), ensuring supply continuity for production and maintenance applications.

Frequently Asked Questions (FAQ)

Q: Can the 0287030.PXCN be used as a direct replacement for the 0257030.L?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical current rating (30 A), voltage rating (32 V DC), melting I²t (1510), DC cold resistance (0.00197 Ohms), and operating temperature range (-40°C to 105°C). Physical dimensions are within tolerance (0.750" L x 0.200" W x 0.480" H versus 0.752" L x 0.201" W x 0.484" H), and both use the Blade, ATO/ATC package format for standard fuse holder compatibility.

Q: What is the difference between the two part numbers?

A: The 0257030.L is classified as obsolete and was packaged in 50-piece units. The 0287030.PXCN is the active production equivalent, packaged in bulk format with significantly higher inventory availability. Both parts deliver identical electrical protection performance and thermal characteristics.

Q: Are there any compatibility concerns when substituting the 0287030.PXCN for the 0257030.L?

A: No compatibility concerns exist. Both parts are designed for ATO/ATC fuse holder applications and maintain identical electrical specifications. The substitute part carries current regulatory approvals (CSA, UL) and meets ROHS3 compliance requirements.

Q: What certifications apply to the substitute part?

A: The 0287030.PXCN carries CSA and UL approvals. These certifications cover automotive fuse applications and provide current regulatory support for production and field replacement applications.

Q: Is the substitute part RoHS compliant?

A: Yes. The 0287030.PXCN is ROHS3 compliant, matching the compliance status of the original 0257030.L.