Littelfuse 0277.250V Fuse Board Mount - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0277.250V is a 250 mA board mount fuse rated for 125 V AC/DC operation. This fast blow fuse is designed for through hole axial mounting in PICO® 277 series applications. The part is currently active in production with 1136 units in stock. Substitute parts are identified when identical electrical specifications and mechanical compatibility are maintained across the same product series and manufacturer.

Substiute Parts

0277.250V

Littelfuse Inc.In Stock: 12050277.250V Datasheet

Current PartRFQ

0277.250M

Littelfuse Inc.In Stock: 19730277.250M Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0277.250V are identified based on strict parametric equivalence within the PICO® 277 series. The following electrical and mechanical parameters must remain identical for substitution eligibility:

• Current Rating: 250 mA
• Voltage Rating (AC/DC): 125 V
• Response Time: Fast Blow
• Mounting Type: Through Hole
• Package / Case: Axial
• Physical Dimensions: 0.093" Dia x 0.280" L (2.36mm x 7.11mm)
• Fuse Type: Board Mount (Cartridge Style Excluded)

The substitute part 0277.250M meets all these criteria and is manufactured by the same supplier (Littelfuse Inc.) within the same product series.

Parameter Comparison

Engineering Selection Recommendations

Both the 0277.250V and 0277.250M are active production parts manufactured by Littelfuse Inc. within the PICO® 277 series. Selection between these parts should be based on availability and inventory status. The 0277.250M currently has higher inventory availability (1927 units) compared to the 0277.250V (1136 units). Both parts maintain identical electrical ratings, mechanical dimensions, and compliance certifications (ROHS3 Compliant, REACH Unaffected). Either part is suitable for direct substitution in applications requiring a 250 mA, 125 V AC/DC fast blow board mount axial fuse.

Frequently Asked Questions (FAQ)

Q: Can the 0277.250M be used as a direct replacement for the 0277.250V?

A: Yes. Both parts are parametrically equivalent with identical current ratings (250 mA), voltage ratings (125 V AC/DC), response time (fast blow), mounting type (through hole), package style (axial), and physical dimensions (0.093" Dia x 0.280" L). They are manufactured by the same supplier within the same product series.

Q: Are there any differences in compliance or certifications between these parts?

A: No. Both parts carry identical compliance certifications: ROHS3 Compliant and REACH Unaffected status.

Q: What determines substitution eligibility for PICO® 277 series fuses?

A: Substitution eligibility is determined by matching current rating, voltage rating (AC and DC), response time, mounting type, package style, and physical dimensions. Any deviation in these parameters disqualifies a part from substitution.

Q: Does packaging format affect substitution compatibility?

A: No. Both the main part and substitute are supplied in bulk packaging. The packaging format does not affect electrical or mechanical compatibility in the application.

Q: Which part should be selected based on current availability?

A: Selection should be based on project timeline and inventory requirements. The 0277.250M has higher current stock availability (1927 units) compared to the 0277.250V (1136 units).