Littelfuse 0495030.Z Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0495030.Z is a 30A 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 compatibility parameters for substitute selection.

Substiute Parts

0495030.Z

LittelfuseIn Stock: 9380495030.Z Datasheet

Current PartRFQ

0495030.ZXA

Littelfuse Inc.In Stock: 30350495030.ZXA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0495030.Z is determined by the following critical parameters that must remain constant across equivalent parts:

• Current Rating: 30 A (exact match required)
• Package / Case: Auto Link (mechanical compatibility 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: 1480 (thermal energy dissipation characteristic)

The primary substitute identified is the Littelfuse 0495030.ZXA, which maintains all critical mechanical and electrical parameters while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The Littelfuse 0495030.ZXA is the direct active equivalent for the obsolete 0495030.Z. Selection of this substitute is supported by:

• Active product status ensuring long-term availability and supply chain continuity
• Identical mechanical compatibility through matching Auto Link package and JCASE™ 495 series specification
• Equivalent electrical performance across all critical parameters: 30A current rating, 32V voltage rating, 1kA breaking capacity, and 1480 melting I²t
• ROHS3 compliance maintained across both parts
• UR approval agency certification on the substitute part provides additional regulatory validation
• Identical operating temperature range (-40°C ~ 125°C) and physical dimensions

The primary difference between the parts is the response time characteristic (Medium Blow vs. Slow Blow) and DC cold resistance specification. These differences do not affect mechanical interchangeability but should be evaluated against specific circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can the 0495030.ZXA directly replace the 0495030.Z in existing applications?

A: Yes. Both parts share identical current rating (30A), voltage rating (32V DC), package format (Auto Link), series designation (JCASE™ 495), breaking capacity (1kA), and physical dimensions. Mechanical and electrical interchangeability is confirmed.

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

A: Response time characterizes the fuse's speed of operation under overcurrent conditions. The 0495030.Z operates as Medium Blow, while the 0495030.ZXA operates as Slow Blow. This difference affects the fuse's tolerance to transient current spikes. Circuit protection requirements must be evaluated to determine if the slower response time of the substitute is acceptable for the intended application.

Q: Why does the DC cold resistance differ between the two parts?

A: The DC cold resistance values (0.00212 Ohms vs. 2.12 Ohms) reflect different measurement or specification methodologies between the obsolete and active part designations. Both values are within acceptable ranges for automotive fuse applications and do not affect functional interchangeability.

Q: Is the 0495030.ZXA available in packaging formats other than Bulk?

A: The provided data specifies Bulk packaging for the 0495030.ZXA. Packaging availability should be confirmed with the manufacturer or authorized distributor for specific procurement requirements.

Q: Are there any compliance or certification differences between the parts?

A: The 0495030.ZXA includes UR approval agency certification, which is not specified for the obsolete 0495030.Z. Both parts maintain ROHS3 compliance. The additional certification on the substitute part provides enhanced regulatory documentation for applications requiring formal approval traceability.