Littelfuse 169.5201 Automotive Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 169.5201 is a 20A 32VDC automotive blade fuse with slow-blow response characteristics, designed for automotive electrical protection applications requiring a holder-mounted installation. This part is classified as obsolete, making identification of active equivalent components essential for ongoing system support and new design implementations.

Substiute Parts

169.5201

Littelfuse Inc.In Stock: 1101169.5201 Datasheet

Current PartRFQ

0299020.TXN

Littelfuse Inc.In Stock: 8530299020.TXN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 169.5201 is determined by strict equivalence across the following critical parameters:

• Current Rating: 20 A (exact match required)
• Voltage Rating - DC: 32 V (exact match required)
• Fuse Type: Automotive (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: Blade, Max (exact match required)
• Mounting Type: Requires Holder (exact match required)

The substitute part 0299020.TXN meets all mandatory electrical and mechanical criteria for direct substitution. Both parts share identical current and voltage ratings, fuse classification, response characteristics, and physical form factor requirements.

Parameter Comparison

Engineering Selection Recommendations

The 0299020.TXN is the direct active equivalent for the obsolete 169.5201. Both components are manufactured by Littelfuse Inc. and provide identical electrical protection characteristics for 20A 32VDC automotive applications.

The substitute part offers the following advantages for new implementations and system replacements:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance meets current environmental and regulatory requirements
• Approved to DIN, ISO, and SAE standards, providing international certification coverage
• Operating temperature range of -40°C to 125°C supports extended automotive environmental conditions
• Lower DC cold resistance (0.0031 Ohms vs. 0.0038 Ohms) provides improved electrical efficiency

Physical dimensions are equivalent within manufacturing tolerances, confirming mechanical interchangeability in existing holder installations.

Frequently Asked Questions (FAQ)

Q: Can the 0299020.TXN directly replace the 169.5201 in existing automotive circuits?

A: Yes. Both parts share identical current ratings (20A), voltage ratings (32VDC), response characteristics (slow-blow), and physical form factors (Blade, Max). Direct substitution is electrically and mechanically compatible.

Q: What is the significance of the product status change from Obsolete to Active?

A: The 169.5201 is no longer manufactured. The 0299020.TXN is an active product with confirmed ongoing production and availability, ensuring reliable sourcing for replacement and new design applications.

Q: Are there compliance differences between these parts?

A: The 169.5201 is RoHS non-compliant, while the 0299020.TXN is ROHS3 compliant. For applications subject to environmental regulations or customer requirements, the substitute part meets current compliance standards.

Q: Do dimensional differences affect installation?

A: Dimensional variations between the parts (169.5201: 29.70mm L × 9.10mm W × 21.30mm H; 0299020.TXN: 29.21mm L × 8.85mm W × 21.59mm H) are within standard manufacturing tolerances and do not affect compatibility with standard automotive fuse holders.

Q: What certifications apply to the substitute part?

A: The 0299020.TXN is approved to DIN, ISO, and SAE standards, providing comprehensive international certification for automotive applications.