Littelfuse 0216.400MXP Ceramic Fuse 400mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0216.400MXP is a 400 mA ceramic cartridge fuse rated for 250 V AC/DC operation in a 5mm x 20mm form factor. This component is classified as obsolete, requiring identification of active equivalent alternatives for continued system support and procurement. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct functional replacement without circuit redesign.

Substiute Parts

0216.400MXP

Littelfuse Inc.In Stock: 23410216.400MXP Datasheet

Current PartRFQ

5HF 400-R

Bel Fuse Inc.In Stock: 22215HF 400-R Datasheet

DirectRFQ

FCD-400MA

OptiFuseIn Stock: 5875FCD-400MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 0216.400MXP are qualified based on the following mandatory parameters:

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

Two active substitute parts meet these criteria: the Bel Fuse Inc. 5HF 400-R and the OptiFuse FCD-400MA. Both maintain electrical and mechanical compatibility with the original specification.

Parameter Comparison

Engineering Selection Recommendations

Both the Bel Fuse 5HF 400-R and OptiFuse FCD-400MA are active products suitable for replacing the obsolete Littelfuse 0216.400MXP. Selection between these two substitutes depends on specific application requirements:

The Bel Fuse 5HF 400-R carries approvals from CCC, CE, CSA, and cULus, providing broad regulatory coverage for industrial and consumer applications.

The OptiFuse FCD-400MA carries IEC 60127 approval and explicitly specifies 250 V DC rating in addition to 250 V AC, making it suitable for applications requiring dual AC/DC voltage certification. This part also features the lowest melting I²t value (0.02) among the three options, indicating faster thermal response.

Both substitutes are ROHS3 compliant and maintain the required 5mm x 20mm form factor for existing holder compatibility. Dimensional variations are minimal and do not affect mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can the Bel Fuse 5HF 400-R and OptiFuse FCD-400MA be used interchangeably with the Littelfuse 0216.400MXP?

A: Both parts meet the mandatory electrical and mechanical parameters (400 mA, 250 V AC, 5x20mm ceramic cartridge, fast blow, 1.5 kA breaking capacity). They are mechanically and electrically compatible for direct substitution in existing fuse holders.

Q: What is the significance of the melting I²t difference between the three parts?

A: Melting I²t is a thermal energy parameter that affects fuse response time. The OptiFuse FCD-400MA (0.02) responds faster than the Littelfuse 0216.400MXP (0.04), while the Bel Fuse 5HF 400-R (0.091) responds more slowly. Selection should align with circuit protection requirements.

Q: Why does the OptiFuse FCD-400MA specify 250 V DC while the others do not?

A: The OptiFuse FCD-400MA is rated for both 250 V AC and 250 V DC operation. The Littelfuse 0216.400MXP and Bel Fuse 5HF 400-R do not explicitly specify DC voltage ratings in the provided data. For applications requiring DC operation, the OptiFuse FCD-400MA provides explicit certification.

Q: Are there dimensional differences that affect holder compatibility?

A: The Bel Fuse 5HF 400-R has a slightly smaller diameter (0.201" vs. 0.205") compared to the other two parts. All three maintain the 0.787" length and 5x20mm nominal specification. Existing fuse holders designed for 5x20mm cartridges accommodate all three parts.

Q: What regulatory approvals should I consider for my application?

A: The Bel Fuse 5HF 400-R holds CCC, CE, CSA, and cULus approvals. The OptiFuse FCD-400MA holds IEC 60127 approval. The original Littelfuse 0216.400MXP held CCC, CE, CSA, SEMKO, UL, and VDE approvals. Select the substitute based on your target market and regulatory requirements.