Littelfuse 0230007.HXSW Glass Axial Fuse 7A 125VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0230007.HXSW is a 7A 125VAC slow-blow glass cartridge fuse with axial through-hole mounting. This part is classified as obsolete. Due to its discontinued status, equivalent substitute parts from the same manufacturer series are available to maintain design compatibility and ensure supply chain continuity. All substitute parts maintain identical electrical and mechanical specifications while offering improved product status and compliance certifications.

Key Parameters

Parameter	Value
Current Rating	7 A
Voltage Rating (AC)	125 V
Voltage Rating (DC)	Not specified for main part
Response Time	Slow Blow
Fuse Type	Cartridge, Glass
Mounting Type	Through Hole
Package / Case	Cartridge, Non-Standard (Axial)
Size / Dimension	0.177" Dia x 0.571" L (4.50mm x 14.50mm)
Breaking Capacity @ Rated Voltage	400A
Melting I²t	464
DC Cold Resistance	0.0115 Ohms
Operating Temperature Range	-55°C ~ 125°C
Series	230

Substitute Part Grouping Explanation

Substitution eligibility for the 0230007.HXSW is determined by the following critical parameters:

Current Rating: 7 A (exact match required)
Voltage Rating (AC): 125 V (exact match required)
Response Time: Slow Blow (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Cartridge, Non-Standard (Axial) (exact match required)
Size / Dimension: 0.177" Dia x 0.571" L (4.50mm x 14.50mm) (exact match required)
Breaking Capacity @ Rated Voltage: 400A (exact match required)
Melting I²t: 464 (exact match required)

All substitute parts listed below meet these criteria and are manufactured by Littelfuse Inc. within the 230 series. The primary distinction between the main part and substitutes is product status and compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Fuse Type	Mounting Type	Size (mm)	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ω)	Product Status	RoHS Status
0230007.HXSW	Littelfuse Inc.	7	125	Not specified	Slow Blow	Cartridge, Glass	Through Hole	4.50 x 14.50	400	464	0.0115	Obsolete	RoHS non-compliant
0230007.HXSP	Littelfuse Inc.	7	125	125	Slow Blow	Cartridge, Glass	Through Hole	4.50 x 14.50	400	464	0.0116	Active	ROHS3 Compliant
0230007.HXP	Littelfuse	7	125	125	Slow Blow	Cartridge, Glass	Through Hole	4.50 x 14.50	400	464	0.0116	Active	ROHS3 Compliant
0230007.MXP	Littelfuse Inc.	7	125	125	Slow Blow	Cartridge, Glass	Through Hole	4.50 x 14.50	400	464	0.0116	Active	ROHS3 Compliant
0230007.MXSP	Littelfuse Inc.	7	125	125	Slow Blow	Cartridge, Glass	Through Hole	4.50 x 14.50	400	464	0.0116	Active	ROHS3 Compliant
0230007.VXP	Littelfuse Inc.	7	125	125	Slow Blow	Cartridge, Glass	Through Hole	4.50 x 14.50	400	464	0.0116	Active	ROHS3 Compliant
0230007.VXSP	Littelfuse Inc.	7	125	125	Slow Blow	Cartridge, Glass	Through Hole	4.50 x 14.50	400	464	0.0116	Active	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts are direct parametric equivalents to the 0230007.HXSW and are suitable for replacement in applications requiring a 7A 125VAC slow-blow glass axial fuse cartridge.

The primary advantage of selecting substitute parts is product status. The original part is obsolete, while all substitute options are active products with current manufacturing support. Additionally, all substitute parts are ROHS3 compliant, whereas the original part is RoHS non-compliant. Substitute parts carry expanded approval certifications including CE, CSA, PSE, and UL, compared to the original part's cUL and METI certifications.

The DC voltage rating of 125V is explicitly specified for all substitute parts, providing additional clarity for applications requiring DC operation. DC cold resistance values are marginally higher (0.0116 Ohms vs. 0.0115 Ohms) but remain within acceptable tolerance for this component class.

All substitute parts are available in bulk packaging and maintain identical electrical performance characteristics, including 400A breaking capacity and 464 melting I²t values.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 0230007.HXSW with any of the listed substitute parts?

A: Yes. All substitute parts meet the identical electrical and mechanical specifications required for direct replacement. The primary differences are product status (active vs. obsolete) and compliance certifications.

Q: What is the difference between the various substitute part numbers?

A: The substitute parts differ only in their suffix designations (HXSP, HXP, MXP, MXSP, VXP, VXSP). All maintain identical electrical parameters, current ratings, voltage ratings, response times, and physical dimensions. The suffix variations reflect different manufacturing batches or internal Littelfuse product line designations but do not affect functional compatibility.

Q: Does the DC voltage rating matter if my application only uses AC?

A: No. For AC-only applications, the DC voltage rating is not a limiting factor. The AC voltage rating of 125V is the controlling specification for AC operation.

Q: Are all substitute parts available in the same packaging as the original?

A: The original part (0230007.HXSW) was supplied in standard packaging. All substitute parts are available in bulk packaging. Confirm packaging requirements with your supplier if tape-and-reel or other specific packaging formats are required.

Q: What certifications apply to the substitute parts?

A: Substitute parts carry CE, CSA, PSE, and UL certifications. The original part carried cUL and METI certifications. Verify that the substitute part certifications meet your application's regulatory requirements.

Q: Is there a preferred substitute part among the options listed?

A: All substitute parts are electrically and mechanically equivalent. Selection can be based on availability, packaging preference, or specific certification requirements for your application. Consult inventory levels and lead times with your component supplier.

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