Littelfuse 023001.5DRT3SW Equivalent & Substitute Parts

Part Overview

The Littelfuse 023001.5DRT3SW is a 1.5 A 250 V AC DC glass cartridge fuse with axial through-hole mounting. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part belongs to the Littelfuse 230 series of cartridge fuses and is designed for applications requiring slow-blow response characteristics in compact axial form factors.

Key Parameters

Parameter	Value
Current Rating	1.5 A
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Mounting Type	Through Hole
Package / Case	Cartridge, Non-Standard (Axial)
Size / Dimension	0.177" Dia x 0.571" L (4.50mm x 14.50mm)
Melting I²t	15
Operating Temperature	-55°C ~ 125°C
Series	230

Substitute Part Grouping Explanation

Substitute parts for the 023001.5DRT3SW are qualified based on the following critical parameters:

Current Rating: 1.5 A (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (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)
Melting I²t: 15 (exact match required)
Operating Temperature: -55°C ~ 125°C (exact match required)
Series: 230 (exact match required)

All substitute parts listed maintain these electrical and mechanical specifications. The primary distinction between the main part and substitutes is product status and compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage AC	Voltage DC	Response Time	Breaking Capacity AC	Breaking Capacity DC	Product Status	RoHS Status	Approvals	Inventory
023001.5DRT3SW	Littelfuse Inc.	1.5 A	250 V	—	Slow Blow	100 A	—	Obsolete	RoHS non-compliant	CSA, METI, UL	901 Pcs
023001.5DRT3SP	Littelfuse Inc.	1.5 A	250 V	125 V	Slow Blow	35 A	10 kA	Active	ROHS3 Compliant	CE, CSA, PSE, UL	896 Pcs
023001.5DRT1P	Littelfuse Inc.	1.5 A	250 V	125 V	Slow Blow	35 A	10 kA	Active	ROHS3 Compliant	CE, CSA, PSE, UL	737 Pcs
023001.5DRT1SP	Littelfuse Inc.	1.5 A	250 V	125 V	Slow Blow	35 A	10 kA	Active	ROHS3 Compliant	CE, CSA, PSE, UL	958 Pcs
023001.5DRT2P	Littelfuse Inc.	1.5 A	250 V	125 V	Slow Blow	35 A	10 kA	Active	ROHS3 Compliant	CE, CSA, PSE, UL	879 Pcs
023001.5DRT2SP	Littelfuse Inc.	1.5 A	250 V	125 V	Slow Blow	35 A	10 kA	Active	ROHS3 Compliant	CE, CSA, PSE, UL	1128 Pcs
023001.5DRT3P	Littelfuse	1.5 A	250 V	125 V	Slow Blow	35 A	10 kA	Active	ROHS3 Compliant	CE, CSA, PSE, UL	894 Pcs
023001.5MRT1EP	Littelfuse Inc.	1.5 A	250 V	125 V	Slow Blow	35 A	10 kA	Active	ROHS3 Compliant	CE, CSA, PSE, UL	1450 Pcs
023001.5MRT1SSP	Littelfuse Inc.	1.5 A	250 V	125 V	Slow Blow	35 A	10 kA	Active	ROHS3 Compliant	CE, CSA, PSE, UL	723 Pcs

Engineering Selection Recommendations

The 023001.5DRT3SW is obsolete and RoHS non-compliant. All listed substitute parts are active products with ROHS3 compliance, making them suitable for new designs and production environments subject to RoHS regulations.

The substitute parts provide enhanced specifications compared to the main part. While the main part specifies a breaking capacity of 100 A at rated voltage, the substitute parts specify 35 A AC and 10 kA DC breaking capacity. Additionally, substitute parts include DC voltage rating of 125 V, whereas the main part does not specify DC voltage capability.

All substitute parts maintain identical current rating, AC voltage rating, fuse type, response time, mounting configuration, physical dimensions, melting I²t, and operating temperature range. All substitute parts carry CE, CSA, PSE, and UL approvals, providing broader international certification coverage compared to the main part's CSA, METI, and UL approvals.

Frequently Asked Questions (FAQ)

Q: Can I use any of the listed substitute parts as a direct replacement for the 023001.5DRT3SW?

A: Yes. All listed substitute parts maintain the critical electrical and mechanical parameters: 1.5 A current rating, 250 V AC voltage rating, slow-blow response, glass cartridge construction, through-hole mounting, and identical physical dimensions (0.177" Dia x 0.571" L). The substitute parts are functionally equivalent for applications requiring these specifications.

Q: What is the difference between the main part and the substitute parts?

A: The main part (023001.5DRT3SW) is obsolete and RoHS non-compliant. All substitute parts are active products with ROHS3 compliance. The substitute parts also specify DC voltage rating (125 V) and provide enhanced breaking capacity specifications (35 A AC, 10 kA DC) compared to the main part's 100 A breaking capacity specification.

Q: Are there packaging differences among the substitute parts?

A: The main part is supplied in standard packaging. All substitute parts are supplied in Tape & Reel (TR) packaging, which is standard for high-volume production and automated assembly processes.

Q: Do all substitute parts have the same certifications?

A: All substitute parts carry CE, CSA, PSE, and UL approvals. The main part carries CSA, METI, and UL approvals. The substitute parts provide broader international certification coverage.

Q: Which substitute part should I select for new designs?

A: Selection among substitute parts should be based on packaging requirements (all are Tape & Reel), inventory availability, and internal procurement preferences. All substitute parts are electrically and mechanically equivalent and suitable for new designs requiring 1.5 A, 250 V AC slow-blow cartridge fuses in axial form factor.

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