Littelfuse 021506.3MXF151SPP Ceramic Radial Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 021506.3MXF151SPP is a 6.3 A, 250 V AC/DC ceramic cartridge fuse with radial bend cylinder packaging, designed for through-hole mounting applications. This Active product provides slow-blow protection with a 1.5 kA breaking capacity and operates across -55°C to 125°C. Finding equivalent substitute parts may be necessary due to inventory availability, supply chain considerations, or specific certification requirements for regional compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	021506.3MXF151SPP
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)
Breaking Capacity @ Rated Voltage	1.5 kA
Melting I²t	128.75
DC Cold Resistance	0.0108 Ohms
Operating Temperature Range	-55°C ~ 125°C
Mounting Type	Through Hole
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 021506.3MXF151SPP are determined by strict equivalence across the following critical parameters:

Current Rating: 6.3 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Ceramic (exact match required)
Response Time: Slow Blow (exact match required)
Package / Case: Radial Bend Cylinder (exact match required)
Size / Dimension: 0.205" Dia x 0.787" L (5.20mm x 20.00mm) (exact match required)
Melting I²t: 128.75 (exact match required)
DC Cold Resistance: 0.0108 Ohms (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
Mounting Type: Through Hole (exact match required)

Three substitute parts meet all electrical and mechanical equivalence criteria: 021506.3MXF11P, 021506.3MXF160SPP, and 021506.3MXF34P. These parts are direct functional equivalents with identical performance characteristics and physical specifications.

Parameter Comparison

Parameter	021506.3MXF151SPP (Main)	021506.3MXF11P	021506.3MXF160SPP	021506.3MXF34P
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)
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
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Series	215SP	215	215SP	215
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts—021506.3MXF11P, 021506.3MXF160SPP, and 021506.3MXF34P—are electrically and mechanically equivalent to the 021506.3MXF151SPP and maintain Active product status with ROHS3 compliance.

021506.3MXF11P carries the broadest certification portfolio (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE) and offers the highest inventory availability at 6,400 pieces, making it the primary selection for applications requiring maximum regional compliance coverage.

021506.3MXF34P provides equivalent certifications (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE) with 1,124 pieces in stock, suitable for applications with identical compliance requirements.

021506.3MXF160SPP, part of the 215SP series matching the main part's series designation, contains 2,165 pieces in inventory and is appropriate for applications where series consistency is a design consideration.

Frequently Asked Questions (FAQ)

Q: Can 021506.3MXF11P be used as a direct replacement for 021506.3MXF151SPP?

A: Yes. Both parts share identical electrical ratings (6.3 A, 250 V AC), fuse type (Cartridge, Ceramic), response time (Slow Blow), 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 functionally equivalent for through-hole radial bend cylinder applications.

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

A: Both series contain parts with identical electrical and mechanical specifications. The series designation reflects internal Littelfuse product line organization but does not affect electrical performance or physical compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The main part 021506.3MXF151SPP and all three substitute parts (021506.3MXF11P, 021506.3MXF160SPP, 021506.3MXF34P) are ROHS3 compliant.

Q: Do the substitute parts have different approval certifications?

A: The main part 021506.3MXF151SPP carries CE, CQC, CSA, KC, PSE, UR, and VDE certifications. Substitute parts 021506.3MXF11P and 021506.3MXF34P carry CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE certifications. 021506.3MXF160SPP does not list specific approval agencies in the provided data. Regional compliance requirements should determine selection when certifications differ.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. All parts are rated for 250 V AC/DC operation with identical DC cold resistance (0.0108 Ohms).

Q: What inventory levels are available for each substitute?

A: 021506.3MXF11P: 6,400 pieces; 021506.3MXF160SPP: 2,165 pieces; 021506.3MXF34P: 1,124 pieces; Main part 021506.3MXF151SPP: 1,052 pieces.

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