Littelfuse 0225.125MXP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0225.125MXP is a 125 mA fast-blow glass cartridge fuse rated for 250 V AC and 125 V DC operation. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing system maintenance and new designs. The fuse requires a 2AG holder and is housed in a 5mm x 15mm cylindrical glass package. Locating suitable substitutes ensures continuity of supply and system reliability for applications requiring this current and voltage rating.

Substiute Parts

0225.125MXP

Littelfuse Inc.In Stock: 6900225.125MXP Datasheet

Current PartRFQ

BK/C520-125-R

Eaton - Electronics DivisionIn Stock: 1429BK/C520-125-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0225.125MXP is determined by the following critical parameters:

• Current Rating: 125 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 2AG, 5mm x 15mm (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

The Eaton BK/C520-125-R meets all substitution criteria. Both parts share identical current ratings, AC voltage ratings, fuse type classification, package dimensions, response characteristics, and holder requirements. These parameters are the deterministic factors for electrical and mechanical compatibility within 2AG fuse holder applications.

Parameter Comparison

Engineering Selection Recommendations

The Eaton BK/C520-125-R is the direct substitute for the obsolete Littelfuse 0225.125MXP. The Eaton part is currently active in production, ensuring availability for replacement and new applications. Both components are ROHS3 compliant and carry equivalent electrical ratings for 125 mA, 250 V AC operation. The Eaton part holds CSA and UL approvals, providing third-party certification for safety-critical applications. Selection of the Eaton BK/C520-125-R eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing 2AG fuse holder installations.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK/C520-125-R be used as a direct replacement for the Littelfuse 0225.125MXP?

A: Yes. Both parts are 125 mA, 250 V AC fast-blow glass cartridge fuses in the 2AG package format. They are mechanically and electrically interchangeable in any application using a 2AG fuse holder.

Q: What is the significance of the 2AG package designation?

A: The 2AG designation specifies a standardized cylindrical glass fuse package measuring 5mm diameter by 15mm length. This standardization ensures mechanical compatibility with 2AG fuse holders. Both the Littelfuse and Eaton parts conform to this specification.

Q: Does the Eaton part support DC operation?

A: The Eaton BK/C520-125-R is rated for 250 V AC. DC voltage rating is not specified in the available data. The original Littelfuse part is rated for 125 V DC. For applications requiring DC operation, verify DC voltage compatibility with the application requirements before substitution.

Q: What certifications does the Eaton substitute carry?

A: The Eaton BK/C520-125-R holds CSA and UL approvals, providing recognized third-party certification for safety and performance standards.

Q: Why is the Littelfuse part listed as obsolete?

A: Obsolescence indicates the part is no longer in active production. The Eaton BK/C520-125-R provides an active, currently manufactured alternative with equivalent electrical and mechanical specifications.