Littelfuse 0230005.DRT1SW Equivalent & Substitute Parts

Part Overview

The Littelfuse 0230005.DRT1SW is a 5A 125VAC axial glass cartridge fuse with slow-blow response characteristics, designed for through-hole mounting applications. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility. Substitute parts must match the core electrical parameters: 5A current rating, 125V AC voltage rating, slow-blow response time, and non-standard axial cartridge form factor with 4.50mm diameter and 14.50mm length.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating - AC	125 V
Response Time	Slow Blow
Fuse Type	Cartridge, Glass
Package / Case	Cartridge, Non-Standard (Axial)
Size / Dimension	0.177" Dia x 0.571" L (4.50mm x 14.50mm)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	400A
Melting I²t	267
Operating Temperature	-55°C ~ 125°C
DC Cold Resistance	0.0185 Ohms

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

Current Rating: 5 A (exact match required)
Voltage Rating - AC: 125 V (exact match required)
Voltage Rating - DC: 125 V (where specified in substitute)
Response Time: Slow Blow (exact match required)
Fuse Type: Cartridge, Glass (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)
Mounting Type: Through Hole (exact match required)
Breaking Capacity @ Rated Voltage: 400A (exact match required)
Melting I²t: 267 (exact match required)
Operating Temperature: -55°C ~ 125°C (exact match required)

All substitute parts listed below meet these criteria and are classified as active products with current manufacturing status.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage AC	Voltage DC	Response Time	Fuse Type	Package	Size (mm)	Breaking Capacity	Melting I²t	Product Status	RoHS Status	Packaging Type	Inventory
0230005.DRT1SW	Littelfuse Inc.	5 A	125 V	—	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Obsolete	RoHS non-compliant	—	739 Pcs
0230005.DRT1SP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	766 Pcs
0230005.DAT1OP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	1008 Pcs
0230005.DRT1P	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	1008 Pcs
0230005.DRT2P	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	1087 Pcs
0230005.DRT2SP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	841 Pcs
0230005.DRT3P	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	839 Pcs
0230005.DRT3SP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	967 Pcs
0230005.MRT1EP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	964 Pcs
0230005.MRT1SSP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	Cartridge, Glass	Cartridge, Non-Standard (Axial)	4.50 x 14.50	400A	267	Active	ROHS3 Compliant	Tape & Reel (TR)	808 Pcs

Engineering Selection Recommendations

All listed substitute parts are manufactured by Littelfuse Inc. and maintain identical electrical and mechanical specifications to the obsolete 0230005.DRT1SW. The primary distinction between the original part and substitutes is product status and regulatory compliance.

The original 0230005.DRT1SW is classified as obsolete and carries RoHS non-compliant status. All substitute parts are active products with ROHS3 compliance, meeting current regulatory requirements for electronic component manufacturing and distribution.

Substitute parts 0230005.DRT1SP, 0230005.DAT1OP, 0230005.DRT1P, 0230005.DRT2P, 0230005.DRT2SP, 0230005.DRT3P, 0230005.DRT3SP, 0230005.MRT1EP, and 0230005.MRT1SSP are all qualified for direct replacement. All substitutes carry CE, CSA, PSE, and UL certifications, providing broader approval agency coverage compared to the original part's cUL and METI approvals.

Packaging format differs between the original part and substitutes. The original 0230005.DRT1SW uses non-specified packaging, while all substitutes are supplied in Tape & Reel (TR) format, standard for automated assembly operations.

Frequently Asked Questions (FAQ)

Q: Can 0230005.DRT1SP directly replace 0230005.DRT1SW?

A: Yes. Both parts share identical electrical parameters (5A, 125V AC, slow-blow response), mechanical dimensions (4.50mm x 14.50mm), and performance characteristics (400A breaking capacity, 267 melting I²t). The substitute is an active product with ROHS3 compliance and broader certification coverage (CE, CSA, PSE, UL).

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

A: All substitute parts listed meet identical electrical and mechanical specifications. Differences exist only in internal manufacturing designations and packaging lot tracking. Selection among substitutes may be based on inventory availability or procurement lead time.

Q: Is the Tape & Reel packaging compatible with through-hole mounting?

A: Tape & Reel packaging is a supply format for automated component handling and placement. The fuse itself maintains the same through-hole axial cartridge form factor and mounting characteristics as the original part. Packaging format does not affect electrical or mechanical compatibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry ROHS3 compliance status. The original 0230005.DRT1SW is RoHS non-compliant. Substitutes meet current environmental and regulatory standards for electronic component manufacturing.

Q: What certifications do the substitute parts carry?

A: All substitute parts carry CE, CSA, PSE, and UL certifications. The original part carried cUL and METI approvals. Substitute parts provide expanded certification coverage suitable for broader market applications.

Q: Can I use these substitutes in AC-only applications?

A: Yes. All substitute parts are rated for 125V AC operation. Substitute parts additionally carry 125V DC rating, providing expanded application flexibility beyond the original part's AC-only specification.

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