Littelfuse 023004.6DRT2SW Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 023004.6DRT2SW is a 4.6 A 250 V AC glass cartridge fuse with slow-blow response characteristics, designed for through-hole mounting in axial configuration. This part is classified as obsolete. Equivalent and substitute parts are available from the same manufacturer series with improved compliance status and expanded voltage ratings, making them suitable for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Current Rating	4.6 A
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
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	100A
Melting I²t	110
Operating Temperature	-55°C ~ 125°C
Series	230

Substitute Part Grouping Explanation

Substitution for the 023004.6DRT2SW is determined by the following critical parameters:

Current Rating: 4.6 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)
Physical Dimensions: 0.177" Dia x 0.571" L (exact match required)
Mounting Type: Through Hole, Axial (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Substitute parts differ primarily in packaging format (Tape & Reel vs. Cut Tape), product status (Active vs. Obsolete), compliance certifications, and DC voltage rating availability.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Breaking Capacity AC	Melting I²t	DC Cold Resistance (Ω)	Product Status	Packaging	RoHS Status
023004.6DRT2SW	Littelfuse Inc.	4.6	250	—	Slow Blow	100A	110	0.031	Obsolete	—	RoHS non-compliant
023004.6DRT2SP	Littelfuse	4.6	250	125	Slow Blow	100A AC, 10kA DC	110	0.0312	Active	Tape & Reel (TR)	ROHS3 Compliant
023004.6DRT1P	Littelfuse Inc.	4.6	250	125	Slow Blow	100A AC, 10kA DC	110	0.0312	Active	Cut Tape (CT)	ROHS3 Compliant
023004.6DRT2P	Littelfuse Inc.	4.6	250	125	Slow Blow	100A AC, 10kA DC	110	0.0312	Active	Tape & Reel (TR)	ROHS3 Compliant
023004.6DRT3SP	Littelfuse Inc.	4.6	250	125	Slow Blow	100A AC, 10kA DC	110	0.0312	Active	Tape & Reel (TR)	ROHS3 Compliant
023004.6MRT1SSP	Littelfuse Inc.	4.6	250	125	Slow Blow	100A AC, 10kA DC	110	0.0312	Active	Tape & Reel (TR)	ROHS3 Compliant

Engineering Selection Recommendations

The 023004.6DRT2SW is obsolete and RoHS non-compliant. All listed substitute parts are active products with ROHS3 compliance status. Substitute parts provide expanded DC voltage rating (125 V DC) compared to the original part, which carries no DC rating specification.

For new designs and production applications, 023004.6DRT1P, 023004.6DRT2P, 023004.6DRT3SP, and 023004.6MRT1SSP are functionally equivalent and approved under CE, CSA, PSE, and UL certifications. The original part carries CSA, METI, and UL approvals only.

Packaging selection depends on assembly requirements: Cut Tape (CT) for manual or low-volume assembly (023004.6DRT1P), or Tape & Reel (TR) for automated pick-and-place operations (023004.6DRT2SP, 023004.6DRT2P, 023004.6DRT3SP, 023004.6MRT1SSP).

Frequently Asked Questions (FAQ)

Q: Can 023004.6DRT2SW be directly replaced with any of the listed substitutes?

A: Yes. All substitute parts maintain identical current rating (4.6 A), AC voltage rating (250 V), fuse type (glass cartridge), response time (slow blow), physical dimensions (0.177" Dia x 0.571" L), and mounting configuration (through-hole axial). Electrical performance and mechanical fit are equivalent.

Q: What is the difference between the substitute parts?

A: Substitute parts differ in packaging format and product status. 023004.6DRT1P uses Cut Tape packaging for manual assembly. 023004.6DRT2SP, 023004.6DRT2P, 023004.6DRT3SP, and 023004.6MRT1SSP use Tape & Reel packaging for automated assembly. All are active products with current availability and ROHS3 compliance.

Q: Does the DC voltage rating on substitute parts affect AC-only applications?

A: No. The 125 V DC rating on substitute parts is an additional specification that does not affect AC-only circuit operation. AC voltage rating remains 250 V across all parts.

Q: Are there compliance differences between the original and substitute parts?

A: Yes. The original 023004.6DRT2SW carries CSA, METI, and UL approvals and is RoHS non-compliant. All substitute parts carry CE, CSA, PSE, and UL approvals and are ROHS3 compliant. Substitute parts also include REACH Unaffected status.

Q: Which substitute part should be selected for automated assembly?

A: For automated pick-and-place assembly, select from Tape & Reel (TR) packaged options: 023004.6DRT2SP, 023004.6DRT2P, 023004.6DRT3SP, or 023004.6MRT1SSP. For manual or low-volume assembly, 023004.6DRT1P in Cut Tape (CT) packaging is appropriate.

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