Littelfuse 169.5302 Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 169.5302 is a 30A 32VDC automotive blade fuse with slow-blow response characteristics, designed for automotive electrical protection applications requiring a holder-mounted configuration. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and procurement.

Substiute Parts

169.5302

Littelfuse Inc.In Stock: 937169.5302 Datasheet

Current PartRFQ

0299030.ZXNV

Littelfuse Inc.In Stock: 122730299030.ZXNV Datasheet

DirectRFQ

0299030.ZXT

Littelfuse Inc.In Stock: 11210299030.ZXT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 169.5302 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, Max (exact match required)
• Fuse Type: Automotive (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Breaking Capacity @ Rated Voltage: 1kA (exact match required)
• RoHS Status: ROHS3 Compliant (compliance requirement)

The identified substitute parts 0299030.ZXNV and 0299030.ZXT both satisfy these criteria and represent active product alternatives from the same manufacturer, enabling direct functional replacement in automotive electrical circuits.

Parameter Comparison

Engineering Selection Recommendations

Both 0299030.ZXNV and 0299030.ZXT are active product alternatives suitable for replacing the obsolete 169.5302. Selection between these two substitutes should be based on the following factors:

0299030.ZXNV is recommended for general automotive fuse applications where standard performance characteristics are required. This part maintains ROHS3 compliance and demonstrates DC cold resistance values consistent with the original specification range.

0299030.ZXT provides the same electrical and mechanical compatibility with the addition of UR approval agency certification, making it suitable for applications requiring third-party regulatory validation. The elevated DC cold resistance value of this variant should be evaluated against specific circuit requirements.

Both substitutes are available in active inventory status from Littelfuse Inc., ensuring procurement continuity and long-term supply availability compared to the obsolete 169.5302.

Frequently Asked Questions (FAQ)

Q: Can 0299030.ZXNV and 0299030.ZXT be used interchangeably with 169.5302?

A: Both parts meet the critical electrical and mechanical specifications: 30A current rating, 32V DC voltage rating, Blade Max package configuration, and 1kA breaking capacity. They are functionally equivalent for automotive fuse holder applications.

Q: What is the significance of the DC cold resistance difference between the three parts?

A: DC cold resistance affects voltage drop under normal operating conditions. The 169.5302 and 0299030.ZXNV exhibit similar resistance values (0.0022 and 0.00195 Ohms respectively), while 0299030.ZXT shows a notably higher value (1.95 Ohms). Circuit design parameters should be reviewed to confirm compatibility with the selected substitute.

Q: Does the absence of response time specification for 0299030.ZXT affect substitution suitability?

A: The 169.5302 and 0299030.ZXNV are both specified as slow-blow fuses. While 0299030.ZXT does not include explicit response time documentation, it maintains identical current and voltage ratings and breaking capacity, supporting functional equivalence in automotive protection circuits.

Q: Are there compliance differences between the substitute options?

A: Both substitutes are ROHS3 compliant. 0299030.ZXT includes UR approval agency certification, providing additional regulatory documentation for applications requiring third-party validation. 0299030.ZXNV does not list approval agency certification.

Q: What is the operational temperature range for these fuses?

A: The 169.5302 does not specify an operating temperature range. Both active substitutes (0299030.ZXNV and 0299030.ZXT) are rated for -40°C to 125°C operation, providing defined thermal performance boundaries for automotive environments.