Littelfuse 0495060.Z Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0495060.Z is a 60A automotive fuse rated for 32V DC operation, designed for use in automotive electrical systems requiring a medium-blow response characteristic. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing procurement and system maintenance. The Auto Link package format and JCASE™ 495 series specification define the mechanical and electrical interface requirements for direct substitution.

Substiute Parts

0495060.Z

Littelfuse Inc.In Stock: 9000495060.Z Datasheet

Current PartRFQ

0495060.ZXA

LittelfuseIn Stock: 8930495060.ZXA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0495060.Z is determined by the following critical parameters that must remain constant across equivalent parts:

• Current Rating: 60 A (exact match required)
• Package / Case: Auto Link (mechanical interface requirement)
• Series: JCASE™ 495 (form factor and holder compatibility)
• Operating Temperature Range: -40°C ~ 125°C (thermal envelope)
• Breaking Capacity @ Rated Voltage: 1 kA (fault protection capability)
• Melting I²t: 19500 (thermal energy dissipation characteristic)

The primary substitute identified is the Littelfuse 0495060.ZXA, which maintains all critical mechanical and electrical parameters while offering active product status and enhanced compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0495060.ZXA is the direct active equivalent for the obsolete 0495060.Z. Selection of this substitute is supported by:

• Identical current rating, package format, and mechanical dimensions ensuring direct holder compatibility
• Matching breaking capacity and melting I²t characteristics for equivalent fault protection performance
• Active product status with current manufacturing and supply chain availability
• ROHS3 compliance maintained across both parts
• UR approval agency certification on the substitute part provides additional regulatory validation
• Extended voltage rating specification (AC/DC) on the substitute provides broader application compatibility

The primary distinction between these parts is the response time characteristic (Medium Blow vs. Slow Blow) and DC cold resistance value. These differences should be evaluated against specific circuit protection requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can the 0495060.ZXA directly replace the 0495060.Z in existing automotive systems?

A: Yes. Both parts share identical current ratings (60 A), package format (Auto Link), series designation (JCASE™ 495), physical dimensions, breaking capacity (1 kA), and melting I²t (19500). Direct mechanical and electrical substitution is supported.

Q: What is the significance of the response time difference (Medium Blow vs. Slow Blow)?

A: Response time characterizes the fuse's thermal response to overcurrent conditions. Medium Blow fuses (0495060.Z) respond faster to transient overcurrents, while Slow Blow fuses (0495060.ZXA) tolerate brief current surges before opening. Circuit design and load characteristics determine which response time is appropriate.

Q: Why does the DC cold resistance differ between these parts (0.00076 Ohms vs. 0.76 Ohms)?

A: DC cold resistance is measured at room temperature with no current flowing. The significant difference between these values reflects different internal element designs. Both values are within acceptable ranges for automotive fuse applications and do not prevent substitution.

Q: Are both parts RoHS compliant?

A: Yes. Both the 0495060.Z and 0495060.ZXA are ROHS3 compliant, meeting environmental and hazardous substance restrictions.

Q: What does the UR approval on the 0495060.ZXA indicate?

A: UR (Underwriters Laboratories) approval indicates third-party certification of the fuse's safety and performance characteristics. This certification is present on the substitute part but not specified for the obsolete original part.

Q: Are there any packaging differences between these parts?

A: The 0495060.Z is listed with standard packaging, while the 0495060.ZXA is supplied in bulk packaging. Both parts use the Auto Link case format with identical physical dimensions.