Littelfuse 021506.3MXK8SPP Ceramic Radial Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 021506.3MXK8SPP is a 6.3 A, 250 V AC ceramic cartridge fuse with radial bend cylinder package configuration, designed for through-hole mounting applications. This Active product operates across -55°C to 125°C with slow-blow response characteristics and 1.5 kA breaking capacity at rated voltage. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the 215 series ceramic fuse family.

Key Parameters

Parameter	Value
Manufacturer Part Number	021506.3MXK8SPP
Manufacturer	Littelfuse Inc.
Current Rating	6.3 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Slow Blow
Package / Case	Radial Bend Cylinder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	1.5 kA
Melting I²t	128.75
DC Cold Resistance	0.0108 Ohms
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the 021506.3MXK8SPP are identified based on strict electrical and mechanical parameter matching within the Littelfuse 215 series ceramic fuse family. The critical parameters determining substitution eligibility are:

Current Rating: 6.3 A
Voltage Rating (AC): 250 V
Fuse Type: Cartridge, Ceramic
Response Time: Slow Blow
Package / Case: Radial Bend Cylinder
Size / Dimension: 0.205" Dia x 0.787" L (5.20mm x 20.00mm)
Mounting Type: Through Hole
Breaking Capacity @ Rated Voltage: 1.5 kA
Melting I²t: 128.75
Operating Temperature Range: -55°C ~ 125°C

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring direct functional equivalence in circuit protection applications.

Parameter Comparison

Parameter	021506.3MXK8SPP	021506.3MXF11P	021506.3MXF34P	021506.3MXF160SPP
Current Rating (A)	6.3	6.3	6.3	6.3
Voltage Rating - AC (V)	250	250	250	250
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic	Cartridge, Ceramic
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	Radial Bend Cylinder	Radial Bend Cylinder	Radial Bend Cylinder	Radial Bend Cylinder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Breaking Capacity @ Rated Voltage	1.5 kA	1.5 kA	1.5 kA	1.5 kA
Melting I²t	128.75	128.75	128.75	128.75
DC Cold Resistance (Ohms)	0.0108	0.0108	0.0108	0.0108
Operating Temperature Range	-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
Product Status	Active	Active	Active	Active
Series	215	215	215	215SP

Engineering Selection Recommendations

All substitute parts listed—021506.3MXF11P, 021506.3MXF34P, and 021506.3MXF160SPP—are Active products from Littelfuse Inc. with ROHS3 compliance and identical electrical and mechanical specifications to the 021506.3MXK8SPP. Selection among these equivalents may be based on:

Approval agency certifications: 021506.3MXF11P and 021506.3MXF34P carry CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE approvals, while 021506.3MXK8SPP carries no listed approval agencies and 021506.3MXF160SPP carries no listed approval agencies.
Series designation: 021506.3MXF160SPP belongs to the 215SP series variant, while others belong to the standard 215 series.
Inventory availability: Current stock levels vary across part numbers.

All parts are functionally equivalent for 6.3 A, 250 V AC circuit protection applications with identical thermal and electrical performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can 021506.3MXF11P, 021506.3MXF34P, and 021506.3MXF160SPP be used interchangeably with 021506.3MXK8SPP?

A: Yes. All substitute parts maintain identical current rating (6.3 A), voltage rating (250 V AC), fuse type (ceramic cartridge), response time (slow blow), package configuration (radial bend cylinder), physical dimensions (0.205" Dia x 0.787" L), breaking capacity (1.5 kA), melting I²t (128.75), and operating temperature range (-55°C ~ 125°C). They are electrically and mechanically equivalent.

Q: What is the difference between the 215 series and 215SP series?

A: The 215SP designation indicates a series variant. Both 021506.3MXF160SPP (215SP) and the standard 215 series parts maintain identical electrical and mechanical specifications for the 6.3 A, 250 V rating.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts and the main part are ROHS3 compliant.

Q: Do approval agency certifications affect substitution?

A: Approval agency certifications are provided for reference. 021506.3MXF11P and 021506.3MXF34P carry expanded certifications (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE). Selection should align with application-specific regulatory requirements.

Q: Are there any differences in DC cold resistance among the substitute parts?

A: No. All parts, including the main part 021506.3MXK8SPP and all substitutes, have identical DC cold resistance of 0.0108 Ohms.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message