Littelfuse 0229003.MXSP Glass Cartridge Fuse 3A 250VAC 125VDC 2AG Equivalent & Substitute Parts

Part Overview

The Littelfuse 0229003.MXSP is a 3A glass cartridge fuse rated for 250V AC and 125V DC operation in 2AG form factor (5mm x 15mm). This slow-blow fuse cartridge requires a compatible holder for installation and is designed for circuit protection applications requiring moderate current interruption. The part maintains active product status with full compliance to international safety standards including CE, CSA, PSE, and UL certifications. Substitute parts are identified based on identical electrical ratings, mechanical dimensions, and performance characteristics to ensure direct interchangeability in existing circuit designs.

Key Parameters

Parameter	Value
Current Rating	3 A
Voltage Rating AC	250 V
Voltage Rating DC	125 V
Fuse Type	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm
Response Time	Slow Blow
Breaking Capacity AC	35A
Breaking Capacity DC	10kA
Melting I²t	77
Operating Temperature Range	-55°C to 125°C
DC Cold Resistance	0.0383 Ohms
RoHS Status	ROHS3 Compliant
Approval Agencies	CE, CSA, PSE, UL

Substitute Part Grouping Explanation

Substitute parts for the 0229003.MXSP are classified as parametric equivalents based on identical electrical and mechanical specifications. All substitute parts share the following critical parameters that determine interchangeability:

Current Rating: 3 A (exact match)
Voltage Ratings: 250V AC / 125V DC (exact match)
Package Form Factor: 2AG, 5mm x 15mm (exact match)
Response Characteristic: Slow Blow (exact match)
Breaking Capacity: 35A AC / 10kA DC (exact match)
Melting I²t: 77 (exact match)
Operating Temperature: -55°C to 125°C (exact match)
Compliance: CE, CSA, PSE, UL (exact match)

Substitution is valid when all parameters listed above remain unchanged. Differences in packaging format, inventory source, or internal construction do not affect functional equivalence for circuit protection applications.

Parameter Comparison

Parameter	0229003.MXSP	0229003.HXP	0229003.HXSP	0229003.MXP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Current Rating (Amps)	3 A	3 A	3 A	3 A
Voltage Rating AC	250 V	250 V	250 V	250 V
Voltage Rating DC	125 V	125 V	125 V	125 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Breaking Capacity AC	35A	35A	35A	35A
Breaking Capacity DC	10kA	10kA	10kA	10kA
Melting I²t	77	77	77	77
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
DC Cold Resistance	0.0383 Ohms	0.0383 Ohms	0.0383 Ohms	0.0383 Ohms
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agencies	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts (0229003.HXP, 0229003.HXSP, 0229003.MXP) are functionally equivalent to the primary part 0229003.MXSP for circuit protection applications. Selection among these parts may be based on inventory availability and lead time considerations, as all parts maintain identical electrical performance, mechanical compatibility, and regulatory compliance status.

All parts carry active product status and full compliance with CE, CSA, PSE, and UL safety standards. ROHS3 compliance and REACH unaffected status are consistent across all variants, ensuring environmental and regulatory requirements are met regardless of which equivalent part is selected.

Frequently Asked Questions (FAQ)

Q: Can 0229003.HXP, 0229003.HXSP, and 0229003.MXP be used interchangeably with 0229003.MXSP?

A: Yes. All parts share identical electrical ratings (3A, 250V AC, 125V DC), mechanical dimensions (2AG, 5mm x 15mm), response characteristics (Slow Blow), and safety certifications. Direct substitution is valid in any circuit application designed for the 0229003.MXSP.

Q: What determines whether a fuse can substitute for the 0229003.MXSP?

A: Substitution requires exact matching of current rating, voltage ratings (both AC and DC), package form factor, response time characteristic, breaking capacity, and melting I²t value. All listed substitute parts meet these criteria.

Q: Are there differences in performance between the substitute parts?

A: No. All substitute parts have identical electrical performance characteristics, operating temperature ranges, and DC cold resistance values. Differences exist only in packaging source and inventory designation.

Q: Do all substitute parts have the same safety certifications?

A: Yes. All parts carry CE, CSA, PSE, and UL approvals. ROHS3 compliance and REACH unaffected status are consistent across all variants.

Q: What is the significance of the 2AG package designation?

A: 2AG specifies the physical form factor (5mm diameter x 15mm length) and indicates the fuse requires a compatible holder for installation. All substitute parts use the same 2AG package, ensuring mechanical compatibility with existing fuse holders.

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