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

Part Overview

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

Key Parameters

Parameter	Specification
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

Substitute parts for the 021501.6MXP are classified based on the following critical parameters that determine functional equivalence:

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 Considerations:

Breaking Capacity @ Rated Voltage: 1.5kA or higher acceptable
Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
Approval Agencies: UL, CE, CSA, VDE certifications preferred for direct replacement

Substitutes are grouped into two categories: Littelfuse parametric equivalents (021501.6HXP, 021501.6TXP) and cross-manufacturer equivalents (SCHURTER 0001.2506, 0001.2706.11; OptiFuse TCC-1.6A, TCD-1.6A). All listed substitutes meet the primary matching criteria and maintain compatibility with existing fuse holders and circuit protection requirements.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Package	Response Time	Breaking Capacity	Melting I²t	Operating Temp (°C)	RoHS Status
021501.6MXP	Littelfuse	1.6	250	5x20mm	Slow Blow	1.5kA	6.83	-55 ~ 125	ROHS3
021501.6HXP	Littelfuse Inc.	1.6	250	5x20mm	Slow Blow	1.5kA	6.83	-55 ~ 125	ROHS3
021501.6TXP	Littelfuse Inc.	1.6	250	5x20mm	Slow Blow	1.5kA	6.83	-55 ~ 125	ROHS3
0001.2506	SCHURTER Inc.	1.6	250	5x20mm	Slow Blow	1.5kA	4.35	-55 ~ 125	ROHS3
0001.2706.11	SCHURTER Inc.	1.6	250	5x20mm	Slow Blow	1.5kA	4.35	-55 ~ 125	ROHS3
TCC-1.6A	OptiFuse	1.6	250	5x20mm	Slow Blow	100A	5.2838	-55 ~ 125	ROHS3
TCD-1.6A	OptiFuse	1.6	250	5x20mm	Slow Blow	1.5kA	Not specified	-55 ~ 125	ROHS3

Engineering Selection Recommendations

All substitute parts listed maintain active product status and meet the primary electrical and mechanical specifications required for direct replacement of the 021501.6MXP in 5x20mm fuse holder applications.

Littelfuse Parametric Equivalents (021501.6HXP, 021501.6TXP): These parts are identical to the main part in all critical parameters including current rating, voltage rating, breaking capacity, and melting I²t characteristics. Both maintain full compliance with UL, CE, CSA, KC, PSE, SEMKO, and VDE certifications. Selection between these variants and the 021501.6MXP depends on availability and supply chain requirements.

SCHURTER Cross-Manufacturer Equivalents (0001.2506, 0001.2706.11): These parts match the 1.6A, 250VAC, 5x20mm specifications with identical breaking capacity. The melting I²t value of 4.35 differs from the Littelfuse specification of 6.83, indicating faster thermal response. Both parts hold certifications from CCC, VDE, and cURus/cULus. The 0001.2706.11 variant includes additional PSE/JET certification. These parts are suitable for applications where the faster thermal response is acceptable within circuit design parameters.

OptiFuse Parametric Equivalents (TCC-1.6A, TCD-1.6A): Both OptiFuse parts meet the 1.6A, 250VAC, 5x20mm requirements with slow-blow response. The TCC-1.6A has a breaking capacity of 100A compared to 1.5kA for other substitutes, which may limit its application in high-fault-current environments. The TCD-1.6A maintains 1.5kA breaking capacity and holds cURus and IEC 60127 certifications. Selection of OptiFuse variants should consider specific circuit protection requirements and certification needs.

Frequently Asked Questions (FAQ)

Q: Can I use 021501.6HXP or 021501.6TXP as direct replacements for 021501.6MXP?

A: Yes. Both Littelfuse variants are parametric equivalents with identical current rating (1.6A), voltage rating (250VAC), package dimensions (5x20mm), response time (slow-blow), and breaking capacity (1.5kA). They are suitable for direct substitution in existing fuse holders without circuit modification.

Q: What is the difference between Littelfuse and SCHURTER 1.6A fuses?

A: The primary difference is melting I²t: Littelfuse 021501.6MXP specifies 6.83, while SCHURTER 0001.2506 and 0001.2706.11 specify 4.35. This indicates SCHURTER fuses respond thermally faster to overcurrent conditions. Both maintain 1.6A current rating, 250VAC voltage rating, and 5x20mm package compatibility. Certification differences include SCHURTER's inclusion of PSE/JET and absence of SEMKO certification compared to Littelfuse.

Q: Are OptiFuse TCC-1.6A and TCD-1.6A interchangeable with Littelfuse 021501.6MXP?

A: Both OptiFuse parts match the 1.6A, 250VAC, 5x20mm specifications and slow-blow response. The TCC-1.6A has a lower breaking capacity (100A vs. 1.5kA), which may be limiting in high-fault-current circuits. The TCD-1.6A maintains 1.5kA breaking capacity and is fully compatible. Certification differences exist: OptiFuse parts hold cURus/cULus and IEC 60127 certifications rather than the full UL/CE/CSA/VDE suite of the Littelfuse part.

Q: Can I use these fuses in any 5x20mm fuse holder?

A: Yes. All listed parts are ceramic cartridge fuses with identical 5x20mm dimensions and require a standard fuse holder. Compatibility is determined by the holder's voltage and current rating specifications, not by fuse manufacturer. Ensure the holder is rated for at least 250VAC and 1.6A operation.

Q: What does "slow-blow" response time mean?

A: Slow-blow fuses tolerate temporary overcurrent surges without opening, responding only to sustained overcurrent conditions. All listed substitutes maintain this characteristic, making them suitable for circuits with inrush current requirements such as motor startup or transformer energization.

Q: Are all these fuses RoHS3 compliant?

A: Yes. All listed parts maintain ROHS3 compliance status, meeting lead-free and hazardous substance restrictions for electronic component manufacturing and assembly.

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