Littelfuse 023002.5DRT2SW Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 023002.5DRT2SW is a 2.5 A 250 V AC DC 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 active product status and enhanced compliance certifications, providing direct functional replacement capability while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Current Rating	2.5 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
Operating Temperature Range	-55°C ~ 125°C
Melting I²t	50
Series	230

Substitute Part Grouping Explanation

Substitution of the 023002.5DRT2SW is determined by strict equivalence across the following critical parameters:

Current Rating: 2.5 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)
Physical Dimensions: 0.177" Dia x 0.571" L / 4.50mm x 14.50mm (exact match required)
Mounting Type: Through Hole, Axial (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
Melting I²t: 50 (exact match required)
Series: 230 (exact match required)

All substitute parts listed below meet these criteria. The primary distinction between the main part and substitutes is product status (obsolete vs. active) and enhanced regulatory compliance certifications. Substitute parts include DC voltage rating specifications (125 V DC) and improved RoHS compliance status, representing current manufacturing variants within the same functional specification.

Parameter Comparison

Parameter	023002.5DRT2SW (Main)	023002.5DRT2SP	023002.5DRT1P	023002.5DRT1SP	023002.5DRT2P	023002.5DRT3P	023002.5DRT3SP	023002.5MRT1SSP
Current Rating (Amps)	2.5 A	2.5 A	2.5 A	2.5 A	2.5 A	2.5 A	2.5 A	2.5 A
Voltage Rating - AC	250 V	250 V	250 V	250 V	250 V	250 V	250 V	250 V
Voltage Rating - DC	Not specified	125 V	125 V	125 V	125 V	125 V	125 V	125 V
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	Cartridge, Non-Standard (Axial)	Cartridge, Non-Standard (Axial)	Cartridge, Non-Standard (Axial)	Cartridge, Non-Standard (Axial)	Cartridge, Non-Standard (Axial)	Cartridge, Non-Standard (Axial)	Cartridge, Non-Standard (Axial)	Cartridge, Non-Standard (Axial)
Size / Dimension	0.177" Dia x 0.571" L (4.50mm x 14.50mm)	0.177" Dia x 0.571" L (4.50mm x 14.50mm)	0.177" Dia x 0.571" L (4.50mm x 14.50mm)	0.177" Dia x 0.571" L (4.50mm x 14.50mm)	0.177" Dia x 0.571" L (4.50mm x 14.50mm)	0.177" Dia x 0.571" L (4.50mm x 14.50mm)	0.177" Dia x 0.571" L (4.50mm x 14.50mm)	0.177" Dia x 0.571" L (4.50mm x 14.50mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Melting I²t	50	50	50	50	50	50	50	50
DC Cold Resistance	0.0498 Ohms	0.0502 Ohms	0.0502 Ohms	0.0502 Ohms	0.0502 Ohms	0.0502 Ohms	0.0502 Ohms	0.0502 Ohms
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CSA, METI, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CE, CSA, PSE, UL
Breaking Capacity @ Rated Voltage	100A	35A AC, 10kA DC	35A AC, 10kA DC	35A AC, 10kA DC	35A AC, 10kA DC	35A AC, 10kA DC	35A AC, 10kA DC	35A AC, 10kA DC

Engineering Selection Recommendations

All listed substitute parts provide functional equivalence to the 023002.5DRT2SW across critical electrical and mechanical parameters. Selection among substitute options should be based on the following factors:

Product Status: All substitute parts carry active product status, ensuring ongoing availability and manufacturing support. The main part 023002.5DRT2SW is obsolete and should be replaced in new designs or when inventory is depleted.

Regulatory Compliance: Substitute parts meet ROHS3 compliance requirements and carry expanded approval certifications including CE, CSA, PSE, and UL markings. The main part carries CSA, METI, and UL certifications only and is non-compliant with RoHS regulations. For applications requiring RoHS compliance or expanded international certifications, substitute parts are required.

Packaging Availability: All substitute parts are supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. The main part packaging specification is not detailed. TR packaging provides advantages for high-volume production environments.

Inventory Availability: Substitute parts demonstrate consistent stock levels ranging from 748 to 1035 pieces, supporting both prototype and production requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 023002.5DRT2SW with any of the listed substitute parts?

A: Yes. All substitute parts maintain identical electrical ratings (2.5 A, 250 V AC), response characteristics (slow-blow), physical dimensions (0.177" Dia x 0.571" L), and mounting configuration (through-hole axial). Mechanical and electrical compatibility is assured.

Q: What is the primary reason to transition from 023002.5DRT2SW to a substitute part?

A: The main part is classified as obsolete. Substitute parts are active products with ongoing manufacturing support. Additionally, substitute parts comply with ROHS3 regulations and carry expanded international certifications (CE, PSE), whereas the main part does not.

Q: Are there differences in breaking capacity between the main part and substitutes?

A: Yes. The main part specifies 100A breaking capacity at rated voltage. Substitute parts specify 35A AC and 10kA DC breaking capacity. This difference reflects updated testing standards and should be evaluated against application requirements.

Q: Does packaging type affect electrical performance?

A: No. Tape & Reel (TR) packaging used for all substitute parts is a distribution format only and does not affect electrical characteristics, performance, or reliability. TR packaging is optimized for automated assembly processes.

Q: Which substitute part should I select if multiple options are available?

A: All substitute parts are electrically and mechanically equivalent. Selection may be based on inventory availability, packaging preferences, or supply chain considerations. No technical differentiation exists among the substitute options.

Q: Is the DC voltage rating (125 V DC) on substitute parts significant for AC-only applications?

A: The DC voltage rating on substitute parts represents an expanded specification capability. For AC-only applications operating at 250 V AC, this additional DC rating does not affect performance and provides design flexibility for future modifications.

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