Littelfuse 0495025.Z Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0495025.Z is a 25A automotive fuse rated for 32V DC operation with Auto Link packaging. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system maintenance and repair applications. The fuse employs medium blow response characteristics and is designed for automotive electrical protection circuits requiring holder-based installation.

Substiute Parts

0495025.Z

Littelfuse Inc.In Stock: 10610495025.Z Datasheet

Current PartRFQ

0495025.ZXA

Littelfuse Inc.In Stock: 27060495025.ZXA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0495025.Z is determined by the following critical parameters:

• Current Rating: 25 A (exact match required)
• Voltage Rating: 32 V minimum (AC or DC acceptable for automotive applications)
• Package / Case: Auto Link (mechanical and electrical interface compatibility)
• Fuse Type: Automotive (application-specific requirement)
• Size / Dimension: 0.555" L x 0.472" W x 1.063" H (physical fit in existing holders)
• Breaking Capacity: 1 kA (fault protection capability)
• Operating Temperature Range: -40°C ~ 125°C (environmental compatibility)

The primary substitute 0495025.ZXA maintains all critical parameters while offering active product status and enhanced availability. Response time variation (medium blow vs. slow blow) represents a functional difference that must be evaluated against specific circuit protection requirements.

Parameter Comparison

Engineering Selection Recommendations

The 0495025.ZXA serves as the direct substitute for the obsolete 0495025.Z. Both components share identical current ratings, voltage specifications, physical dimensions, and breaking capacity. The substitute maintains ROHS3 compliance and operates within the same temperature range.

The 0495025.ZXA offers active product status with significantly higher inventory availability (2685 pcs vs. 1045 pcs), ensuring supply chain continuity. The component carries UR approval agency certification and REACH unaffected status, providing additional regulatory compliance documentation.

Response time differentiation (medium blow vs. slow blow) reflects the primary functional distinction. The slow blow characteristic of the substitute provides extended tolerance for transient current surges, which may be advantageous in circuits with inductive loads or startup current peaks. Circuit protection requirements must be evaluated to confirm compatibility with this response time modification.

Frequently Asked Questions (FAQ)

Q: Can the 0495025.ZXA directly replace the 0495025.Z in existing automotive applications?

A: Yes. Both components maintain identical current ratings (25 A), voltage specifications (32 V), physical dimensions (0.555" L x 0.472" W x 1.063" H), and Auto Link packaging. Mechanical and electrical interface compatibility is confirmed.

Q: What is the significance of the response time difference between medium blow and slow blow?

A: Response time determines the fuse's reaction speed to overcurrent conditions. Medium blow fuses respond faster to sustained overcurrents, while slow blow fuses tolerate brief transient current spikes before opening. Circuit design and load characteristics determine which response time is appropriate.

Q: Are there compliance or certification differences between these parts?

A: The 0495025.ZXA includes UR approval agency certification and REACH unaffected status documentation. Both components are ROHS3 compliant. The substitute provides enhanced regulatory documentation suitable for applications requiring formal compliance verification.

Q: What is the inventory status for each part?

A: The 0495025.Z (obsolete) has 1045 pcs available. The 0495025.ZXA (active) has 2685 pcs available, providing superior supply chain reliability for ongoing procurement.

Q: Are the DC cold resistance values significant for substitution?

A: DC cold resistance values differ between parts (0.00328 Ohms vs. 3.28 Ohms). Both values fall within acceptable ranges for automotive fuse applications and do not preclude substitution. The resistance difference reflects manufacturing variations between medium blow and slow blow designs.