Littelfuse 021506.3MXGP Ceramic Fuse 6.3A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 021506.3MXGP is a ceramic cartridge fuse rated at 6.3A, 250VAC, with a 5x20mm form factor. This slow-blow fuse is designed for applications requiring holder-based installation and operates across a temperature range of -55°C to 125°C. The part is currently active in production with 1007 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and regulatory compliance certifications.

Key Parameters

Parameter	Value
Current Rating	6.3 A
Voltage Rating (AC)	250 V
Package / Case	5mm x 20mm
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
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 is determined by the following criteria:

Primary Matching Parameters:

Current Rating: 6.3 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 Parameters:

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

Substitute parts are grouped into three categories:

Category 1: Littelfuse Series 215 Direct Equivalents Parts 021506.3HXP, 021506.3MXP, and 021506.3TXP share identical electrical and mechanical specifications with the main part, differing only in internal construction codes and inventory availability.

Category 2: Littelfuse Series 285 Parametric Equivalent Part 028506.3HXP matches all primary parameters with minor variations in melting I²t (130.977 vs 128.75) and reduced approval agency certifications (PSE only).

Category 3: Cross-Manufacturer Equivalents SCHURTER 0001.2512, 0001.2512.G, and 0001.2712.11 provide full electrical equivalence with additional DC voltage rating (150V DC) and different approval certifications. Bel Fuse 0659C6300-12 and OptiFuse TCC-6.3A and TCD-6.3A meet primary electrical and mechanical parameters with variations in breaking capacity and melting I²t specifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Package	Response Time	Breaking Capacity (kA)	Melting I²t	RoHS Status	Inventory (Pcs)
021506.3MXGP	Littelfuse Inc.	6.3	250	5x20mm	Slow Blow	1.5	128.75	ROHS3	1007
021506.3HXP	Littelfuse Inc.	6.3	250	5x20mm	Slow Blow	1.5	128.75	ROHS3	6887
021506.3MXP	Littelfuse Inc.	6.3	250	5x20mm	Slow Blow	1.5	128.75	ROHS3	20100
021506.3TXP	Littelfuse Inc.	6.3	250	5x20mm	Slow Blow	1.5	128.75	ROHS3	1175
028506.3HXP	Littelfuse Inc.	6.3	250	5x20mm	Slow Blow	1.5	130.977	ROHS3	990
0001.2512	SCHURTER Inc.	6.3	250	5x20mm	Slow Blow	1.5	171	ROHS3	6423
0001.2512.G	SCHURTER Inc.	6.3	250	5x20mm	Slow Blow	1.5	171	ROHS3	9642
0001.2712.11	SCHURTER Inc.	6.3	250	5x20mm	Slow Blow	1.5	171	ROHS3	1302
0659C6300-12	Bel Fuse Inc.	6.3	250	5x20mm	Slow Blow	1.5	142.9	ROHS3	2775
TCC-6.3A	OptiFuse	6.3	250	5x20mm	Slow Blow	0.2	52.411	ROHS3	2575
TCD-6.3A	OptiFuse	6.3	250	5x20mm	Slow Blow	1.5	Not Specified	ROHS3	4889

Engineering Selection Recommendations

Littelfuse Series 215 Equivalents (021506.3HXP, 021506.3MXP, 021506.3TXP) These parts are direct parametric equivalents with identical electrical specifications and full regulatory compliance (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE). Selection among these three is based on inventory availability and internal construction requirements. Part 021506.3MXP offers the highest stock level at 20,100 units.

Littelfuse Series 285 (028506.3HXP) This part meets all primary electrical and mechanical requirements with PSE certification only. Use when PSE compliance is the primary regulatory requirement and reduced approval agency scope is acceptable.

SCHURTER SPT Series (0001.2512, 0001.2512.G, 0001.2712.11) These parts provide full electrical equivalence with additional DC voltage rating capability (150V DC). Approval certifications include CCC, cURus, KC, PSE/JET, and VDE. The higher melting I²t value (171) indicates slightly different thermal response characteristics. Part 0001.2512.G offers the highest inventory at 9,642 units.

Bel Fuse 0659C Series (0659C6300-12) This part matches all primary specifications with CCC, cURus, PSE, and VDE certifications. The melting I²t of 142.9 falls between Littelfuse and SCHURTER specifications.

OptiFuse TCC and TCD Series OptiFuse TCC-6.3A has a significantly lower breaking capacity (0.2kA vs 1.5kA) and lower melting I²t (52.411), making it suitable only for applications with lower fault current requirements. OptiFuse TCD-6.3A matches the 1.5kA breaking capacity with cURus and IEC 60127 certifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute 021506.3MXGP with any of the Littelfuse Series 215 alternatives? A: Yes. Parts 021506.3HXP, 021506.3MXP, and 021506.3TXP are direct parametric equivalents with identical current rating, voltage rating, package dimensions, response time, and breaking capacity. All carry the same regulatory certifications.

Q: What is the difference between Littelfuse Series 215 and Series 285? A: Series 285 (028506.3HXP) has a slightly higher melting I²t (130.977 vs 128.75) and reduced approval agency certifications (PSE only vs CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE). Both share identical electrical and mechanical specifications.

Q: Can I use SCHURTER parts as direct replacements? A: SCHURTER 0001.2512, 0001.2512.G, and 0001.2712.11 are electrically and mechanically equivalent with the same 6.3A, 250VAC rating and 5x20mm package. They offer additional DC voltage rating (150V DC) and different regulatory certifications. The higher melting I²t (171) indicates slightly different thermal characteristics but maintains the same 1.5kA breaking capacity.

Q: What is the significance of melting I²t values? A: Melting I²t indicates the thermal energy required to melt the fuse element. Littelfuse parts have melting I²t of 128.75, SCHURTER parts 171, and Bel Fuse 142.9. These variations affect the precise thermal response but all parts maintain slow-blow characteristics suitable for the same application class.

Q: Should I use OptiFuse TCC-6.3A? A: OptiFuse TCC-6.3A has a breaking capacity of only 0.2kA compared to 1.5kA for other equivalents. Use only in applications with confirmed lower fault current levels. For standard applications requiring 1.5kA breaking capacity, use OptiFuse TCD-6.3A instead.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 Compliant status, matching the main part specification.

Q: What certifications should I verify for my application? A: The main part 021506.3MXGP carries CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE certifications. Verify that substitute parts carry the specific certifications required by your application's regulatory framework before selection.

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