Littelfuse 0251005.M Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251005.M is a 5 A, 125 V AC/DC board mount axial fuse from the PICO® II 251 series. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design and procurement requirements. The part is designed for through-hole mounting applications requiring fast-blow response characteristics and is rated for operating temperatures from -55°C to 125°C.

Substiute Parts

0251005.M

Littelfuse Inc.In Stock: 9480251005.M Datasheet

Current PartRFQ

0251005.MXL

Littelfuse Inc.In Stock: 90500251005.MXL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 0251005.M is based on electrical and mechanical parameter equivalence within the PICO® II 251 series. The substitute part 0251005.MXL maintains identical specifications across all critical parameters: current rating (5 A), voltage ratings (125 V AC/DC), response time (Fast Blow), mounting configuration (Through Hole Axial), breaking capacity (50 A AC, 300 A DC), melting I²t (4.14), physical dimensions (0.110" Dia x 0.280" L), and DC cold resistance (0.0158 Ohms). Both parts are certified by the same approval agencies (CCC, CSA, cURus, PSE, TUV) and operate within the same temperature range (-55°C to 125°C).

The primary distinction between these parts is product status and packaging configuration. The 0251005.MXL is active and available in bulk packaging, whereas the 0251005.M is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The 0251005.MXL is the direct substitute for the obsolete 0251005.M. Both parts are electrically and mechanically equivalent across all specified parameters. The 0251005.MXL is currently active and maintains full certification compliance with CCC, CSA, cURus, PSE, and TUV standards.

A significant compliance difference exists: the 0251005.MXL is ROHS3 compliant, whereas the 0251005.M is RoHS non-compliant. For applications subject to RoHS regulations or requiring compliance with current environmental standards, the 0251005.MXL is the appropriate selection. The substitute part is available in bulk packaging and maintains full inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 0251005.MXL be used as a direct replacement for the 0251005.M?

A: Yes. The 0251005.MXL is electrically and mechanically equivalent to the 0251005.M. Both parts share identical current ratings (5 A), voltage ratings (125 V AC/DC), response characteristics (Fast Blow), physical dimensions (0.110" Dia x 0.280" L), and thermal operating range (-55°C to 125°C). The parts are functionally interchangeable in through-hole axial mounting applications.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and regulatory compliance. The 0251005.M is obsolete, while the 0251005.MXL is active. The 0251005.MXL is ROHS3 compliant, whereas the 0251005.M is RoHS non-compliant. Packaging differs: the 0251005.M uses standard packaging, and the 0251005.MXL uses bulk packaging.

Q: Are there any dimensional or performance differences?

A: No. Both parts maintain identical dimensions (0.110" Dia x 0.280" L or 2.80 mm x 7.11 mm), DC cold resistance (0.0158 Ohms), breaking capacity (50 A AC, 300 A DC), and melting I²t value (4.14).

Q: Which part should be selected for new designs?

A: The 0251005.MXL should be selected for new designs. It is active, maintains full regulatory certifications, and is ROHS3 compliant. The 0251005.M is obsolete and should not be used in new applications.

Q: Are both parts certified by the same regulatory agencies?

A: Yes. Both the 0251005.M and 0251005.MXL are certified by CCC, CSA, cURus, PSE, and TUV. Certification compliance is identical between the two parts.