Littelfuse 0287003.U Automotive Fuse 3A 32VDC ATO/ATC Blade Equivalent & Substitute Parts

Part Overview

The Littelfuse 0287003.U is a 3A automotive blade fuse rated for 32V DC operation in the ATO/ATC form factor. This fuse is designed for automotive electrical circuit protection and requires a compatible holder for installation. The part is currently active in production with 707 units in stock. Alternative part numbers within the same product line are available to support procurement flexibility and supply chain continuity.

Substiute Parts

0287003.U

Littelfuse Inc.In Stock: 7750287003.U Datasheet

Current PartRFQ

0287003.H

Littelfuse Inc.In Stock: 10840287003.H Datasheet

Parametric EquivalentRFQ

0287003.PXCN

Littelfuse Inc.In Stock: 72320287003.PXCN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0287003.U are determined by equivalence in the following critical parameters:

• Current Rating: 3 A
• Voltage Rating (DC): 32 V
• Package / Case: Blade, ATO/ATC
• Fuse Type: Automotive
• Series: ATOF®
• Breaking Capacity @ Rated Voltage: 1 kA
• Melting I²t: 7.4
• Operating Temperature Range: -40°C ~ 105°C
• Physical Dimensions: 0.752" L x 0.201" W x 0.484" H (19.10mm x 5.10mm x 12.30mm)

The substitute parts 0287003.H and 0287003.PXCN maintain all critical electrical and mechanical parameters required for direct substitution in automotive fuse applications. Both alternatives are manufactured by Littelfuse Inc. within the same ATOF® series and meet identical performance specifications.

Parameter Comparison

Engineering Selection Recommendations

All three part numbers—0287003.U, 0287003.H, and 0287003.PXCN—are active products manufactured by Littelfuse Inc. and are ROHS3 compliant. Selection between these alternatives is based on procurement availability and inventory levels:

• 0287003.U: 707 units in stock
• 0287003.H: 996 units in stock
• 0287003.PXCN: 7,211 units in stock

The 0287003.PXCN variant offers the highest inventory availability. All three parts meet identical electrical specifications, mechanical dimensions, and regulatory compliance requirements for automotive fuse applications.

Frequently Asked Questions (FAQ)

Q: Can 0287003.H and 0287003.PXCN be used interchangeably with 0287003.U?

A: Yes. All three part numbers share identical electrical ratings (3A, 32V DC), mechanical dimensions (0.752" L x 0.201" W x 0.484" H), package type (Blade, ATO/ATC), and performance characteristics (1 kA breaking capacity, 7.4 melting I²t). They are direct substitutes within the ATOF® series.

Q: Are there differences in response time between these parts?

A: The 0287003.U does not specify a response time parameter. The 0287003.H and 0287003.PXCN are both rated as Fast Blow fuses. This difference does not affect substitution eligibility, as all three parts maintain the same melting I²t value of 7.4.

Q: Do all three parts require the same holder?

A: Yes. All three parts use the Blade, ATO/ATC package format and require a compatible ATO/ATC fuse holder for installation.

Q: Are there compliance or certification differences?

A: The 0287003.U does not list an approval agency. The 0287003.H and 0287003.PXCN both carry UL approval. All three parts are ROHS3 compliant and REACH unaffected.

Q: What is the difference in DC cold resistance between 0287003.U and the other parts?

A: The 0287003.U specifies 31.1 Ohms DC cold resistance, while 0287003.H and 0287003.PXCN specify 0.0311 Ohms. This difference reflects measurement or specification methodology and does not affect functional equivalence for circuit protection applications.