Littelfuse 021601.6H Ceramic Fuse 1.6A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 021601.6H is a 1.6A 250VAC ceramic cartridge fuse in 5x20mm form factor, rated for fast-blow response with 1.5kA breaking capacity. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for direct circuit substitution.

Key Parameters

Parameter	Value
Current Rating	1.6 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Package / Case	5mm x 20mm
Response Time	Fast Blow
Breaking Capacity @ Rated Voltage	1.5kA
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (1.6A), voltage rating (250VAC), fuse type (cartridge ceramic), package dimensions (5x20mm), response time (fast blow), and breaking capacity (1.5kA). All substitute parts listed maintain these core electrical and mechanical specifications, enabling direct replacement in holder-based fuse applications.

The substitute parts are categorized as follows:

Littelfuse Series 216 Active Equivalents: Parts 021601.6HXP, 021601.6MXBP, 021601.6MXGP, 021601.6MXP, and 021601.6TXP are parametric equivalents from the same manufacturer with active product status and RoHS3 compliance.

Cross-Manufacturer Alternatives: Parts from Eaton Electronics Division (GDA-1.6A, BK/GDA-1.6A, BK/S501-1.6-R) and Bel Fuse Inc. (5HF 1.6-R) provide equivalent electrical performance with active availability.

Parameter Comparison

Part Number	Manufacturer	Current (A)	Voltage (V AC)	Package	Response Time	Breaking Capacity (kA)	Product Status	RoHS Status
021601.6H	Littelfuse Inc.	1.6	250	5x20mm	Fast Blow	1.5	Obsolete	Non-compliant
021601.6HXP	Littelfuse Inc.	1.6	250	5x20mm	Fast Blow	1.5	Active	ROHS3 Compliant
021601.6MXBP	Littelfuse Inc.	1.6	250	5x20mm	Fast Blow	1.5	Active	ROHS3 Compliant
021601.6MXGP	Littelfuse Inc.	1.6	250	5x20mm	Fast Blow	1.5	Active	ROHS3 Compliant
021601.6MXP	Littelfuse Inc.	1.6	250	5x20mm	Fast Blow	1.5	Active	ROHS3 Compliant
021601.6TXP	Littelfuse Inc.	1.6	250	5x20mm	Fast Blow	1.5	Active	ROHS3 Compliant
021601.6VXP	Littelfuse Inc.	1.6	250	5x20mm	Fast Blow	1.5	Active	ROHS3 Compliant
BK/GDA-1.6A	Eaton - Electronics Division	1.6	250	5x20mm	Fast Blow	1.5	Active	RoHS Compliant
5HF 1.6-R	Bel Fuse Inc.	1.6	250	5x20mm	Fast Blow	1.5	Active	ROHS3 Compliant
BK/S501-1.6-R	Eaton - Electronics Division	1.6	250	5x20mm	Fast Blow	1.5	Active	RoHS Compliant
GDA-1.6A	Eaton - Electronics Division	1.6	250	5x20mm	Fast Blow	1.5	Active	RoHS Compliant

Engineering Selection Recommendations

Primary Recommendation: Littelfuse Series 216 variants (021601.6HXP, 021601.6MXP, 021601.6TXP, 021601.6VXP) are preferred substitutes due to identical manufacturer lineage, active product status, and RoHS3 compliance. These parts carry expanded approval certifications including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE.

Secondary Alternatives: Bel Fuse 5HF 1.6-R and Eaton GDA-1.6A series provide equivalent electrical performance with active availability. Eaton parts carry RoHS compliance with certifications including CCC, SEMKO, and UL/cULus.

Compliance Consideration: The original 021601.6H is RoHS non-compliant. All active substitutes listed are RoHS compliant or RoHS3 compliant, meeting current regulatory requirements for new designs and procurement.

Frequently Asked Questions (FAQ)

Q: Can 021601.6HXP directly replace 021601.6H in existing circuits? A: Yes. Both parts share identical electrical ratings (1.6A, 250VAC), fuse type (ceramic cartridge), package dimensions (5x20mm), response time (fast blow), and breaking capacity (1.5kA). Direct substitution in holder-based applications is supported.

Q: What is the difference between Littelfuse 021601.6MXP and 021601.6TXP? A: Both parts are parametrically equivalent with identical current, voltage, package, and response characteristics. Differences exist only in packaging designation and internal manufacturing process codes. Selection between them depends on procurement availability and packaging requirements.

Q: Are cross-manufacturer substitutes (Eaton, Bel Fuse) electrically equivalent? A: Yes. Eaton GDA-1.6A, BK/GDA-1.6A, BK/S501-1.6-R and Bel Fuse 5HF 1.6-R maintain the same electrical specifications: 1.6A current rating, 250VAC voltage rating, 5x20mm package, fast-blow response, and 1.5kA breaking capacity. Physical dimensions and holder compatibility are identical.

Q: Does the melting I²t value affect substitution eligibility? A: Melting I²t values vary slightly across manufacturers (Littelfuse: 1.005-1.008, Eaton: 0.748, Bel Fuse: 2.1) but all parts meet the 1.5kA breaking capacity requirement at rated voltage. These variations reflect different ceramic formulations and do not prevent direct substitution in standard applications.

Q: What certifications should I verify for regulatory compliance? A: All listed substitutes carry CCC, CE, CSA, and SEMKO certifications. Littelfuse variants include additional UL and VDE approvals. Eaton parts include cULus certification. Verify specific certification requirements for your application region before final selection.

Q: Is the 5.10mm dimension of Bel Fuse 5HF 1.6-R compatible with 5.20mm holders? A: The 5.10mm diameter of the 5HF 1.6-R is within standard mechanical tolerance for 5x20mm fuse holders. Holder compatibility is maintained across all listed substitutes.

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