Littelfuse 021601.6MXP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 021601.6MXP is a 1.6 A, 250 V AC ceramic cartridge fuse in 5mm x 20mm form factor with fast-blow response characteristics. This component is designed for circuit protection in AC and DC applications requiring reliable overcurrent interruption. The part maintains active product status with full compliance to international safety standards including UL, CE, CSA, and VDE certifications. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory approvals align with the original specification.

Substiute Parts

021601.6MXP

Littelfuse Inc.In Stock: 1876021601.6MXP Datasheet

Current PartRFQ

021601.6HXP

Littelfuse Inc.In Stock: 1197021601.6HXP Datasheet

DirectRFQ

5HF 1.6-R

Bel Fuse Inc.In Stock: 17975HF 1.6-R Datasheet

DirectRFQ

GDA-1.6A

Eaton - Electronics DivisionIn Stock: 984GDA-1.6A Datasheet

MFR RecommendedRFQ

0001.1006

SCHURTER Inc.In Stock: 13040001.1006 Datasheet

Parametric EquivalentRFQ

FCD-1.6A

OptiFuseIn Stock: 2355FCD-1.6A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 021601.6MXP is determined by strict alignment of the following parameters:

• Current Rating: 1.6 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 1.5 kA (exact match required)
• Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these core electrical and mechanical parameters. Variations in secondary characteristics such as melting I²t, DC cold resistance, and specific approval agency certifications are noted but do not preclude substitution when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and satisfy the core electrical and mechanical requirements of the 021601.6MXP specification. Selection among substitutes should be based on the following factors:

Littelfuse 021601.6HXP: Direct manufacturer equivalent with identical electrical characteristics and approval certifications. Recommended for applications requiring continuity within the Littelfuse 216 series.

Bel Fuse 5HF 1.6-R: Meets all primary parameters with slightly elevated melting I²t (2.1 versus 1.005). Holds certifications including cURus and IMQ. Suitable for applications where Bel Fuse supply chain integration is preferred.

Eaton GDA-1.6A: Manufacturer-recommended equivalent with lower melting I²t (0.748). Certifications include CCC and SEMKO. Appropriate for applications requiring Eaton component standardization.

SCHURTER 0001.1006: Parametric equivalent with melting I²t of 0.755. Certifications include cURus, KC, and PSE/JET. Suitable for applications requiring SCHURTER supply chain integration.

OptiFuse FCD-1.6A: Parametric equivalent with melting I²t of 1.243 and explicit 250 V DC voltage rating. Certifications include IEC 60127. Appropriate for applications requiring dual AC/DC voltage specification clarity.

All parts are ROHS3 compliant and REACH unaffected where specified. Component selection should align with existing supply chain agreements and application-specific regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the 021601.6HXP be used as a direct replacement for the 021601.6MXP?

A: Yes. Both parts are manufactured by Littelfuse, share identical current rating (1.6 A), voltage rating (250 V AC), package dimensions (5mm x 20mm), and response time (fast blow). Electrical characteristics and certifications are equivalent.

Q: What is the significance of the melting I²t variation among substitute parts?

A: Melting I²t represents the thermal energy required to melt the fuse element. Variations (ranging from 0.748 to 2.1 in this group) indicate different thermal response profiles. All listed parts meet the 1.5 kA breaking capacity requirement at rated voltage. Selection should align with application thermal characteristics and circuit protection requirements.

Q: Are all substitute parts mechanically compatible with existing fuse holders?

A: All substitute parts conform to the 5mm x 20mm cartridge form factor and require a holder for mounting. The Bel Fuse 5HF 1.6-R has a slightly smaller diameter (0.201" versus 0.205"), which may result in marginally looser mechanical fit in some holders. Verify holder compatibility before deployment.

Q: Which substitute part offers the broadest regulatory approval coverage?

A: The Littelfuse 021601.6HXP and SCHURTER 0001.1006 both carry comprehensive approval certifications including CCC, CE, CSA, VDE, and PSE. The OptiFuse FCD-1.6A is certified to IEC 60127 standard. Selection should align with specific regional regulatory requirements for the application.

Q: Can the OptiFuse FCD-1.6A be used in DC-only applications?

A: The FCD-1.6A is rated for both 250 V AC and 250 V DC operation. It is suitable for DC applications. Other parts in this group are rated for AC operation; DC suitability should be confirmed with manufacturer documentation before use in DC circuits.