Littelfuse 033707.5PXS Automotive Micro Blade Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 033707.5PXS is a 7.5 A automotive micro blade fuse rated for 32 V DC operation. This component is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing design support and procurement. The fuse is designed for automotive applications requiring holder-based mounting and provides 1 kA breaking capacity at rated voltage with a melting I²t of 47.

Substiute Parts

033707.5PXS

Littelfuse Inc.In Stock: 1018033707.5PXS Datasheet

Current PartRFQ

033707.5PX2S

Littelfuse Inc.In Stock: 4048033707.5PX2S Datasheet

DirectRFQ

033707.5LXS

Littelfuse Inc.In Stock: 1212033707.5LXS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 033707.5PXS are identified based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Current Rating: 7.5 A (exact match required)
• Voltage Rating: 32 V DC (exact match required)
• Package / Case: Blade, Micro (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Melting I²t: 47 (exact match required)
• Operating Temperature Range: -40°C ~ 125°C (exact match required)
• Physical Dimensions: 0.567" L x 0.165" W x 0.417" H (exact match required)

Substitute Parts Identified:

1. 033707.5PX2S - Direct manufacturer equivalent with active product status. Belongs to the MICRO2™ series. Meets all electrical and mechanical parameters. Primary recommended substitute.

2. 033707.5LXS - Parametric equivalent from the 337 series with active product status. Meets all electrical and mechanical parameters including breaking capacity specification.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are manufactured by Littelfuse Inc. and maintain full electrical and mechanical compatibility with the 033707.5PXS.

033707.5PX2S is the primary recommended substitute. It carries active product status and belongs to the MICRO2™ series, representing the current generation of this fuse specification. This part is available in bulk packaging with 3,991 pieces in stock.

033707.5LXS is an alternative substitute from the 337 series with active product status. It provides identical electrical performance and physical compatibility. This part is available in bulk packaging with 1,152 pieces in stock.

Both substitutes are ROHS3 compliant and carry REACH Unaffected status, meeting current regulatory requirements. Selection between the two substitutes should be based on procurement availability, lead time, and inventory requirements, as both provide equivalent electrical and mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can 033707.5PX2S and 033707.5LXS be used interchangeably with 033707.5PXS?

A: Yes. Both substitute parts meet all specified electrical parameters (7.5 A, 32 V DC), mechanical dimensions (0.567" L x 0.165" W x 0.417" H), and thermal characteristics (-40°C ~ 125°C). They are compatible with the same holder-based mounting systems.

Q: What is the difference between 033707.5PX2S and 033707.5LXS?

A: Both parts are electrically and mechanically identical. The primary difference is series designation: 033707.5PX2S belongs to the MICRO2™ series, while 033707.5LXS belongs to the 337 series. Both carry active product status and are manufactured by Littelfuse Inc.

Q: Are there any compliance differences between the substitute parts and the original?

A: All three parts are ROHS3 compliant. The substitute parts additionally carry REACH Unaffected status. There are no compliance barriers to substitution.

Q: Does the DC cold resistance difference between 033707.5PXS (10.8 Ohms) and 033707.5PX2S (0.0108 Ohms) affect compatibility?

A: DC cold resistance is not a substitution-limiting parameter for this fuse category. Both parts meet the specified electrical performance requirements for automotive micro blade fuse applications.

Q: Which substitute should be selected for new designs?

A: For new designs, 033707.5PX2S is the recommended choice as it represents the current generation MICRO2™ series with active product status and higher inventory availability.