Littelfuse 169.5202 Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 169.5202 is a 20A 32VDC automotive blade fuse with slow-blow response characteristics, designed for automotive electrical circuit protection. This part is classified as obsolete, making identification of active equivalent components essential for ongoing system maintenance and new design implementations. The OFK3 series designation and blade-mount configuration define its mechanical and electrical interface requirements.

Substiute Parts

169.5202

LittelfuseIn Stock: 758169.5202 Datasheet

Current PartRFQ

0299020.ZXNV

LittelfuseIn Stock: 134690299020.ZXNV Datasheet

DirectRFQ

0299020.ZXT

Littelfuse Inc.In Stock: 9670299020.ZXT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 169.5202 is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 20 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)
• Breaking Capacity @ Rated Voltage: 1kA (exact match required)
• Mounting Type: Requires Holder (exact match required)

Both substitute parts listed—0299020.ZXNV and 0299020.ZXT—meet all mandatory electrical and mechanical parameters. Both are manufactured by Littelfuse, carry active product status, and maintain ROHS3 compliance. The substitutes belong to the MAXI® series, which provides dimensional compatibility within the Blade, Max form factor.

Parameter Comparison

Engineering Selection Recommendations

Both 0299020.ZXNV and 0299020.ZXT are valid substitutes for the obsolete 169.5202, as they satisfy all mandatory electrical and mechanical compatibility criteria. Selection between the two active alternatives should be based on the following factors:

0299020.ZXNV is recommended for applications requiring documented operating temperature specifications (-40°C ~ 125°C) and is available in higher inventory volume (13,384 pcs). This part carries REACH Unaffected status and is packaged in bulk format.

0299020.ZXT provides UR approval agency certification and is also rated for -40°C ~ 125°C operation. Inventory availability is lower (908 pcs). This variant is suitable for applications where third-party certification is a system requirement.

Both substitutes maintain ROHS3 compliance and are manufactured by Littelfuse, ensuring continuity of supply chain qualification and design validation protocols.

Frequently Asked Questions (FAQ)

Q: Can 0299020.ZXNV and 0299020.ZXT be used interchangeably with 169.5202?

A: Yes. Both substitutes meet the mandatory electrical parameters (20A, 32VDC, 1kA breaking capacity) and mechanical requirements (Blade, Max form factor, automotive fuse type). The 169.5202 is obsolete; both alternatives are active products from the same manufacturer.

Q: What is the difference between the two substitute parts?

A: Both parts are electrically and mechanically equivalent. 0299020.ZXNV offers higher inventory availability and REACH Unaffected status. 0299020.ZXT includes UR approval agency certification. Dimensional tolerances are within the Blade, Max specification envelope for both parts.

Q: Are there any compatibility concerns with the Blade, Max form factor?

A: No. Both substitutes are designed for the same holder interface as the 169.5202. Dimensional variations (length, width, height) are within the Blade, Max standard tolerance range and do not affect mechanical fit or electrical performance in automotive fuse holders.

Q: Does the difference in Melting I²t values affect substitution?

A: The Melting I²t parameter reflects thermal response characteristics. The 169.5202 specifies 2000, while both substitutes specify 1100. This difference is inherent to the MAXI® series design and does not prevent substitution, as both alternatives maintain the slow-blow response classification required for automotive circuit protection.

Q: What certifications apply to these substitute parts?

A: All three parts are ROHS3 compliant. 0299020.ZXT carries UR approval. 0299020.ZXNV is REACH Unaffected. Selection should align with system-level certification requirements.