Littelfuse 022904.6MXSP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 022904.6MXSP is a 4.6 A slow-blow glass cartridge fuse rated for 250 V AC and 125 V DC operation. This component is designed for circuits requiring holder-mounted fuse protection in the 2AG form factor (5mm x 15mm). The part maintains active product status with full regulatory compliance across CE, CSA, PSE, and UL certifications. Equivalent and substitute parts are identified based on identical electrical ratings, mechanical dimensions, and performance characteristics within the Littelfuse 229 series.

Key Parameters

Parameter	Specification
Current Rating	4.6 A
Voltage Rating - AC	250 V
Voltage Rating - DC	125 V
Response Time	Slow Blow
Package / Case	2AG, 5mm x 15mm
Breaking Capacity @ Rated Voltage	100 A AC, 10 kA DC
Melting I²t	110
DC Cold Resistance	0.0312 Ohms
Operating Temperature Range	-55°C ~ 125°C
Approval Agencies	CE, CSA, PSE, UL
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 022904.6MXSP is determined by strict equivalence across the following critical parameters:

Current Rating: 4.6 A
Voltage Rating: 250 V AC / 125 V DC
Response Time: Slow Blow
Package / Case: 2AG, 5mm x 15mm
Breaking Capacity: 100 A AC, 10 kA DC
Melting I²t: 110
DC Cold Resistance: 0.0312 Ohms
Operating Temperature: -55°C ~ 125°C
Regulatory Compliance: CE, CSA, PSE, UL
RoHS Status: ROHS3 Compliant

All substitute parts listed maintain identical specifications across these parameters, ensuring direct functional and mechanical interchangeability within holder-mounted fuse applications.

Parameter Comparison

Part Number	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Package	Breaking Capacity AC	Breaking Capacity DC	Melting I²t	DC Cold Resistance (Ω)	Operating Temp (°C)	Certifications	RoHS Status	Inventory (Pcs)
022904.6MXSP	4.6	250	125	Slow Blow	2AG, 5mm x 15mm	100 A	10 kA	110	0.0312	-55 ~ 125	CE, CSA, PSE, UL	ROHS3	681
022904.6HXSP	4.6	250	125	Slow Blow	2AG, 5mm x 15mm	100 A	10 kA	110	0.0312	-55 ~ 125	CE, CSA, PSE, UL	ROHS3	837
022904.6HXP	4.6	250	125	Slow Blow	2AG, 5mm x 15mm	100 A	10 kA	110	0.0312	-55 ~ 125	CE, CSA, PSE, UL	ROHS3	1567
022904.6MXP	4.6	250	125	Slow Blow	2AG, 5mm x 15mm	100 A	10 kA	110	0.0312	-55 ~ 125	CE, CSA, PSE, UL	ROHS3	1604

Engineering Selection Recommendations

All substitute parts maintain active product status and carry identical regulatory certifications (CE, CSA, PSE, UL). Selection between 022904.6MXSP, 022904.6HXSP, 022904.6HXP, and 022904.6MXP is based on availability and inventory levels. All parts are ROHS3 compliant and suitable for applications requiring 4.6 A slow-blow fuse protection in 250 V AC / 125 V DC circuits with 2AG form factor holders.

Frequently Asked Questions (FAQ)

Q: Can 022904.6HXSP be used as a direct replacement for 022904.6MXSP?

A: Yes. Both parts share identical electrical ratings (4.6 A, 250 V AC, 125 V DC), response time (slow blow), mechanical dimensions (2AG, 5mm x 15mm), breaking capacity (100 A AC, 10 kA DC), and regulatory certifications. Direct substitution is supported.

Q: What determines compatibility between these fuse part numbers?

A: Compatibility is determined by current rating, voltage ratings (AC and DC), response time classification, package dimensions, breaking capacity, and melting I²t value. All listed substitutes maintain identical specifications across these parameters.

Q: Are all substitute parts certified to the same standards?

A: Yes. All parts carry CE, CSA, PSE, and UL certifications and maintain ROHS3 compliance. Operating temperature range is -55°C to 125°C across all variants.

Q: What is the significance of the part number suffix variations (MXSP, HXSP, HXP, MXP)?

A: Suffix variations indicate different packaging or distribution configurations within the Littelfuse 229 series. All variants maintain identical electrical and mechanical specifications for the 4.6 A slow-blow cartridge fuse.

Q: Can these fuses be used interchangeably in existing 2AG fuse holders?

A: Yes. All parts conform to the 2AG form factor (5mm x 15mm) and are designed for holder-mounted applications. Mechanical and electrical interchangeability is ensured.

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