Littelfuse 021501.6VXP Ceramic Fuse 1.6A 250VAC 5x20mm - Equivalent & Substitute Parts

Part Overview

The Littelfuse 021501.6VXP is a ceramic cartridge fuse rated at 1.6A, 250VAC with slow-blow response characteristics. This component is designed for circuit protection in applications requiring a 5mm x 20mm form factor and holder-based mounting. The part maintains active product status with full compliance to international safety standards including UL, CE, CSA, and VDE certifications. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response time characteristics, and regulatory approvals to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	1.6 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	1.5kA
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 021501.6VXP is determined by the following critical parameters:

Primary Matching Criteria:

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: Slow Blow (exact match required)
Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Factors:

Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
Breaking Capacity @ Rated Voltage: 1.5kA (minimum requirement)
RoHS Compliance: ROHS3 Compliant (regulatory requirement)

All identified substitute parts meet these criteria and are therefore electrically and mechanically interchangeable with the main part number in circuit protection applications.

Parameter Comparison

Parameter	021501.6VXP (Littelfuse)	021501.6HXP (Littelfuse)	0001.2506 (SCHURTER)	0659C1600-12 (Bel Fuse)	TCC-1.6A (OptiFuse)	TCD-1.6A (OptiFuse)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	SCHURTER Inc.	Bel Fuse Inc.	OptiFuse	OptiFuse
Current Rating (Amps)	1.6 A	1.6 A	1.6 A	1.6 A	1.6 A	1.6 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Breaking Capacity @ Rated Voltage	1.5kA	1.5kA	1.5kA	1.5kA	100A	1.5kA
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts are active products with full regulatory compliance. Selection among equivalent options should be based on:

Certification Alignment: The Littelfuse 021501.6VXP and 021501.6HXP both carry identical approval agencies (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE), making them the primary equivalents. The SCHURTER 0001.2506 and Bel Fuse 0659C1600-12 carry overlapping certifications (CCC, VDE, PSE) with additional DC voltage rating capability (300V DC for SCHURTER). The OptiFuse TCC-1.6A and TCD-1.6A carry cURus/UL and cURus/IEC certifications respectively.

Breaking Capacity Consideration: The OptiFuse TCC-1.6A specifies 100A breaking capacity, which is lower than the 1.5kA standard of other equivalents. This may limit its application in circuits requiring higher fault current interruption capability.

Inventory Availability: All substitute parts maintain active stock status, with Bel Fuse 0659C1600-12 offering the highest inventory level (4469 pcs).

Frequently Asked Questions (FAQ)

Q: Can I substitute the Littelfuse 021501.6VXP with any of the listed equivalent parts?

A: Yes. All listed parts are electrically and mechanically equivalent, sharing identical current ratings (1.6A), voltage ratings (250VAC), ceramic cartridge construction, slow-blow response, and 5mm x 20mm form factor. They are direct substitutes for circuit protection applications.

Q: What is the significance of the breaking capacity difference in the OptiFuse TCC-1.6A?

A: The OptiFuse TCC-1.6A specifies 100A breaking capacity compared to 1.5kA for other equivalents. Breaking capacity defines the maximum fault current the fuse can safely interrupt. Applications with higher fault current levels should use parts with 1.5kA breaking capacity.

Q: Are there voltage rating differences I should consider?

A: The main part and most substitutes are rated 250VAC. The SCHURTER 0001.2506 additionally supports 300VDC operation, providing expanded voltage compatibility for DC applications. All parts meet the 250VAC requirement of the original specification.

Q: Do all substitute parts require the same holder?

A: Yes. All substitute parts use the 5mm x 20mm cartridge form factor and require a compatible fuse holder. The holder itself is not part of this specification and must be sourced separately.

Q: Which substitute offers the best regulatory coverage?

A: The Littelfuse 021501.6HXP carries the broadest approval agency list (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE), matching the original 021501.6VXP exactly. This makes it the most universally compliant substitute across global markets.

Q: Can I use these fuses in both AC and DC circuits?

A: All parts are rated for 250VAC operation. DC operation capability varies: the SCHURTER 0001.2506 explicitly supports 300VDC, while others do not specify DC ratings. Verify DC compatibility with the specific application requirements before selection.

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