Littelfuse 032603.2MXP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 032603.2MXP is a 3.2 A, 250 V AC/DC ceramic cartridge fuse from the 326 series, designed for circuit protection in applications requiring slow-blow response characteristics. This fuse requires a 3AB or 3AG holder and is housed in a 1/4" x 1-1/4" (6.35mm x 31.75mm) form factor. The part maintains Active product status with full regulatory compliance across CE, CSA, K-MARK, PSE, and UL certifications. Equivalent and substitute parts are identified when electrical ratings, mechanical dimensions, and regulatory approvals align with the original specification.

Substiute Parts

032603.2MXP

Littelfuse Inc.In Stock: 2183032603.2MXP Datasheet

Current PartRFQ

032603.2HXP

Littelfuse Inc.In Stock: 1171032603.2HXP Datasheet

Parametric EquivalentRFQ

BK/MDA-3-2/10-R

Eaton - Electronics DivisionIn Stock: 967BK/MDA-3-2/10-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 032603.2MXP are identified based on strict electrical and mechanical parameter alignment:

Primary Substitution Criteria:

• Current Rating: 3.2 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Mechanical Form Factor: 1/4" x 1-1/4" (6.35mm x 31.75mm) with 3AB/3AG holder compatibility (exact match required)
• RoHS Compliance: ROHS3 Compliant (required for environmental standards)

Substitute Categories:

Parametric Equivalent: Parts that match all electrical and mechanical specifications with identical performance characteristics.

Manufacturer Recommended Substitute: Parts from alternative manufacturers that meet the same electrical ratings, mechanical dimensions, and regulatory requirements, with documented cross-reference approval.

Parameter Comparison

Engineering Selection Recommendations

032603.2HXP (Littelfuse - Parametric Equivalent)

This part is a direct parametric equivalent to the 032603.2MXP. Both parts are manufactured by Littelfuse Inc., share identical electrical ratings (3.2 A, 250 V), matching response characteristics (Slow Blow), and mechanical form factors (1/4" x 1-1/4"). Both maintain Active product status and ROHS3 compliance. The 032603.2HXP carries the same regulatory approvals (CE, CSA, K-MARK, PSE, UL) and identical melting I²t value (214), confirming functional interchangeability. This substitute is suitable for direct replacement in all applications where the 032603.2MXP is specified.

BK/MDA-3-2/10-R (Eaton - Manufacturer Recommended Substitute)

This part is a manufacturer-recommended substitute from Eaton - Electronics Division. It matches the primary electrical specifications (3.2 A, 250 V AC) and mechanical dimensions (1/4" x 1-1/4", 3AB/3AG holder compatible). The part maintains Active product status and ROHS3 compliance with CE, CSA, and UL regulatory approvals. The DC cold resistance (0.045 Ohms) and melting I²t value (17.5) differ from the original specification, reflecting design variations between manufacturers. This substitute is suitable for applications where Eaton components are preferred or where supply chain requirements necessitate cross-manufacturer sourcing.

Frequently Asked Questions (FAQ)

Q: Can the 032603.2HXP be used as a direct replacement for the 032603.2MXP?

A: Yes. The 032603.2HXP is a parametric equivalent with identical electrical ratings (3.2 A, 250 V), response time (Slow Blow), mechanical dimensions (1/4" x 1-1/4"), and regulatory approvals. Both parts are manufactured by Littelfuse Inc. and maintain the same melting I²t characteristic (214). Direct substitution is supported.

Q: What are the key differences between the Littelfuse 032603.2MXP and the Eaton BK/MDA-3-2/10-R?

A: Both parts share identical current rating (3.2 A), voltage rating (250 V AC), fuse type (Cartridge, Ceramic), response time (Slow Blow), and mechanical form factor (1/4" x 1-1/4"). The primary differences are manufacturer origin and internal characteristics: the Eaton part has a lower DC cold resistance (0.045 Ohms vs. 0.0539 Ohms) and different melting I²t value (17.5 vs. 214). Both are ROHS3 compliant and Active products.

Q: Are all three parts compatible with 3AB and 3AG holders?

A: Yes. All three parts—032603.2MXP, 032603.2HXP, and BK/MDA-3-2/10-R—are specified for use with 3AB and 3AG holders and share the identical 1/4" x 1-1/4" (6.35mm x 31.75mm) mechanical form factor. They are mechanically interchangeable in any holder designed for this package type.

Q: Which regulatory approvals apply to each substitute part?

A: The 032603.2MXP and 032603.2HXP both carry CE, CSA, K-MARK, PSE, and UL approvals. The Eaton BK/MDA-3-2/10-R carries CE, CSA, and UL approvals. All three parts are ROHS3 compliant and REACH unaffected.

Q: Can the Eaton BK/MDA-3-2/10-R be used in applications where the Littelfuse 032603.2MXP is specified?

A: The Eaton part meets the primary electrical and mechanical requirements (3.2 A, 250 V, Slow Blow, 1/4" x 1-1/4" form factor) and carries overlapping regulatory approvals (CE, CSA, UL). However, the different melting I²t value (17.5 vs. 214) indicates different internal thermal characteristics. Substitution is supported for applications where these thermal differences are acceptable and where Eaton components are approved for use.