Littelfuse 0215.400H Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0215.400H is a 400 mA, 250 V AC/DC ceramic cartridge fuse with slow-blow response characteristics, designed for 5mm x 20mm holder applications. This part is classified as obsolete, making identification of active equivalent components necessary for ongoing system support and new design implementations. Substitute parts must maintain identical electrical performance and mechanical compatibility while meeting current manufacturing and compliance standards.

Substiute Parts

0215.400H

Littelfuse Inc.In Stock: 11540215.400H Datasheet

Current PartRFQ

0215.400HXP

Littelfuse Inc.In Stock: 11770215.400HXP Datasheet

DirectRFQ

5HT 400-R

Bel Fuse Inc.In Stock: 12165HT 400-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0215.400H is determined by strict equivalence across the following critical parameters:

• Current Rating: Must be 400 mA
• Voltage Rating (AC): Must be 250 V
• Fuse Type: Must be Cartridge, Ceramic
• Response Time: Must be Slow Blow
• Package / Case: Must be 5mm x 20mm
• Breaking Capacity @ Rated Voltage: Must be 1.5 kA
• Operating Temperature Range: Must be -55°C to 125°C

All identified substitute parts meet these mandatory criteria. Variations in secondary parameters such as melting I²t, DC cold resistance, and dimensional tolerances within the specified package class do not preclude substitution, as these fall within acceptable engineering margins for this component category.

Parameter Comparison

Engineering Selection Recommendations

0215.400HXP (Littelfuse) is the direct manufacturer equivalent. This part maintains identical electrical and mechanical specifications to the 0215.400H while offering active product status and enhanced compliance certifications (CE, SEMKO, UL, VDE). The 0215.400HXP is ROHS3 compliant, addressing regulatory requirements that the original part does not meet. Melting I²t and DC cold resistance values remain within acceptable operational margins.

5HT 400-R (Bel Fuse) is a cross-manufacturer substitute that meets all critical electrical and mechanical parameters. This part is also ROHS3 compliant and carries broader approval certifications (CCC, CE, CSA, cULus). The dimensional tolerance on diameter (5.10mm versus 5.20mm) remains within the 5mm x 20mm package class specification. The lower melting I²t value (0.28 versus 1.45) and higher DC cold resistance (1.47 versus 0.56 Ohms) represent design differences between manufacturers but do not preclude functional equivalence within the specified 400 mA, 250 V, slow-blow operating envelope.

For new designs and systems requiring regulatory compliance, either the 0215.400HXP or 5HT 400-R is appropriate. For legacy system maintenance where the original part is no longer available, both substitutes provide electrical and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 0215.400HXP directly replace the 0215.400H in existing applications?

A: Yes. The 0215.400HXP maintains identical current rating (400 mA), voltage rating (250 V AC), fuse type (ceramic cartridge), response time (slow blow), package dimensions (5mm x 20mm), and breaking capacity (1.5 kA). Both parts require the same holder type and operate across the same temperature range (-55°C to 125°C).

Q: What is the difference between the Littelfuse 0215.400HXP and the Bel Fuse 5HT 400-R?

A: Both parts are electrically and mechanically equivalent for the specified 400 mA, 250 V, slow-blow application. Differences exist in melting I²t (1.325 versus 0.28) and DC cold resistance (0.5825 versus 1.47 Ohms), reflecting different manufacturing designs. Both carry active product status and ROHS3 compliance. The 5HT 400-R has a slightly smaller diameter tolerance (5.10mm versus 5.20mm) but remains within the 5mm x 20mm package class.

Q: Are there any compatibility concerns when switching between Littelfuse and Bel Fuse versions?

A: No compatibility concerns exist for the specified application parameters. Both manufacturers' parts are designed for identical 5mm x 20mm holders and deliver the same 400 mA protection at 250 V AC with slow-blow response. Holder compatibility is determined by package class, not manufacturer.

Q: Why does the 0215.400H show as obsolete?

A: The 0215.400H is classified as obsolete due to its RoHS non-compliant status and limited active inventory support. The 0215.400HXP and 5HT 400-R represent current-generation alternatives that meet modern regulatory requirements while maintaining full electrical and mechanical equivalence.

Q: Can I use these fuses in applications requiring higher breaking capacity?

A: No. All three parts are rated for 1.5 kA breaking capacity at rated voltage. Applications requiring higher breaking capacity require a different fuse design and cannot use these 400 mA ceramic cartridge fuses.