Littelfuse 0230005.DRT2SW Equivalent & Substitute Parts

Part Overview

The Littelfuse 0230005.DRT2SW is a 5A 125VAC axial glass cartridge fuse from the 230 series, designed for through-hole mounting applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component sourcing. The fuse provides slow-blow response characteristics with a 400A breaking capacity at rated voltage and operates across a temperature range of -55°C to 125°C.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	125 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	Cartridge, Non-Standard (Axial)
Mounting Type	Through Hole
Size / Dimension	0.177" Dia x 0.571" L (4.50mm x 14.50mm)
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 for the 0230005.DRT2SW is determined by strict equivalence across the following critical parameters:

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

All substitute parts listed maintain these electrical and mechanical specifications. The primary distinction between the main part and substitutes is product status (obsolete versus active) and compliance certifications. Substitute parts are available in active production status with enhanced RoHS3 compliance and expanded approval agency certifications.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage (AC)	Voltage (DC)	Response Time	Breaking Capacity	Melting I²t	Size	DC Resistance	Product Status	RoHS Status	Certifications
0230005.DRT2SW	Littelfuse Inc.	5 A	125 V	—	Slow Blow	400A	267	0.177" x 0.571"	0.0185 Ω	Obsolete	Non-compliant	cUL, METI
0230005.DRT2SP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL
0230005.DAT1OP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL
0230005.DRT1P	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL
0230005.DRT1SP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL
0230005.DRT2P	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL
0230005.DRT3P	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL
0230005.DRT3SP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL
0230005.MRT1EP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL
0230005.MRT1SSP	Littelfuse Inc.	5 A	125 V	125 V	Slow Blow	400A	267	0.177" x 0.571"	0.0186 Ω	Active	ROHS3 Compliant	CE, CSA, PSE, UL

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the 0230005.DRT2SW. Selection among active alternatives should be based on the following factors:

Product Status: The main part is obsolete. All substitute parts are in active production, ensuring long-term availability and supply chain continuity.

Compliance Certifications: The original part carries cUL and METI approvals. Substitute parts expand certification coverage to include CE, CSA, PSE, and UL, providing broader regulatory acceptance across international markets.

RoHS Compliance: The original part is RoHS non-compliant. All substitute parts are ROHS3 compliant, meeting current environmental and hazardous substance restrictions.

Packaging: Substitute parts are supplied in Tape & Reel (TR) packaging, which differs from the original part's standard packaging. This affects handling, storage, and automated assembly processes.

DC Voltage Rating: The original part specifies AC voltage only. Substitute parts include explicit DC voltage rating (125 V DC), providing additional application flexibility for DC circuit protection.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 0230005.DRT2SW with any of the listed substitutes?

A: Yes. All listed parts maintain identical electrical specifications (5A, 125VAC, slow-blow response, 400A breaking capacity) and mechanical dimensions (0.177" Dia x 0.571" L). The primary differences are product status, compliance certifications, and packaging format.

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

A: The substitute parts differ only in internal manufacturing specifications and packaging configurations. All maintain the same electrical and mechanical parameters required for direct substitution. The part number variations reflect different manufacturing dates, process revisions, or packaging batches within the 230 series.

Q: Does the Tape & Reel packaging affect circuit board compatibility?

A: Tape & Reel packaging is standard for automated assembly processes. If manual insertion or non-automated assembly is required, individual fuses must be removed from the tape. The fuse itself remains identical in form factor and electrical performance.

Q: Why does the original part lack a DC voltage rating?

A: The 0230005.DRT2SW was specified for AC applications only. Substitute parts explicitly rate 125V DC operation, expanding application scope. Both ratings are equivalent for circuit protection purposes in this current and voltage class.

Q: Are there any thermal or performance differences between substitutes?

A: No. All parts share identical operating temperature range (-55°C to 125°C), melting I²t (267), and DC cold resistance specifications (0.0186 Ω for substitutes, 0.0185 Ω for the original). These minor resistance variations are within normal manufacturing tolerance.

Q: Which substitute should I select for new designs?

A: Any active substitute part is suitable. Selection may depend on packaging preference, certification requirements for your target market, and supplier availability. All parts are functionally equivalent for the 5A 125V slow-blow cartridge fuse application.

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