Littelfuse 023002.5DRT1SW Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 023002.5DRT1SW 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 necessary to maintain design continuity and ensure component availability for production and field replacement applications.

Key Parameters

Parameter	Value
Manufacturer	Littelfuse Inc.
Series	230
Current Rating	2.5 A
Voltage Rating - AC	250 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)
Operating Temperature	-55°C ~ 125°C
Melting I²t	50

Substitute Part Grouping Explanation

Substitute parts for the 023002.5DRT1SW are qualified based on the following criteria:

Electrical Parameters (Must Match):

Current Rating: 2.5 A
Voltage Rating - AC: 250 V
Fuse Type: Cartridge, Glass
Response Time: Slow Blow
Melting I²t: 50

Mechanical Parameters (Must Match):

Package / Case: Cartridge, Non-Standard (Axial)
Mounting Type: Through Hole
Size / Dimension: 0.177" Dia x 0.571" L (4.50mm x 14.50mm)

Operational Parameters (Must Match):

Operating Temperature: -55°C ~ 125°C
Series: 230

The substitute parts listed below meet all these criteria. The primary distinction between the main part (023002.5DRT1SW) and its substitutes is product status and compliance certification. The main part is obsolete; all substitute parts are active and provide enhanced regulatory compliance.

Parameter Comparison

Part Number	Product Status	Voltage Rating - DC	Breaking Capacity @ Rated Voltage	Approval Agency	RoHS Status	Packaging	Inventory (Pcs)
023002.5DRT1SW	Obsolete	Not Specified	100A	CSA, METI, UL	RoHS non-compliant	Bulk	836
023002.5DRT1SP	Active	125 V	35A AC, 10kA DC	CE, CSA, PSE, UL	ROHS3 Compliant	Tape & Reel (TR)	1035
023002.5DRT1P	Active	125 V	35A AC, 10kA DC	CE, CSA, PSE, UL	ROHS3 Compliant	Tape & Reel (TR)	935
023002.5DRT2P	Active	125 V	35A AC, 10kA DC	CE, CSA, PSE, UL	ROHS3 Compliant	Tape & Reel (TR)	748
023002.5DRT2SP	Active	125 V	35A AC, 10kA DC	CE, CSA, PSE, UL	ROHS3 Compliant	Tape & Reel (TR)	771
023002.5DRT3P	Active	125 V	35A AC, 10kA DC	CE, CSA, PSE, UL	ROHS3 Compliant	Tape & Reel (TR)	754
023002.5DRT3SP	Active	125 V	35A AC, 10kA DC	CE, CSA, PSE, UL	ROHS3 Compliant	Tape & Reel (TR)	955
023002.5MRT1SSP	Active	125 V	35A AC, 10kA DC	CE, CSA, PSE, UL	ROHS3 Compliant	Tape & Reel (TR)	876

Engineering Selection Recommendations

All substitute parts are active products manufactured by Littelfuse Inc. within the 230 series and maintain electrical and mechanical compatibility with the obsolete 023002.5DRT1SW.

Compliance Advantages: Substitute parts provide expanded regulatory certifications (CE, CSA, PSE, UL) compared to the main part (CSA, METI, UL) and are ROHS3 compliant, addressing modern environmental and safety standards.

DC Voltage Rating: Substitute parts specify 125 V DC rating, providing defined DC performance characteristics absent in the main part specification.

Breaking Capacity: Substitute parts specify 35A AC and 10kA DC breaking capacity, compared to the main part's 100A specification at rated voltage. This difference reflects updated testing standards and application requirements.

Packaging: Substitute parts are supplied in Tape & Reel format, suitable for automated assembly processes, whereas the main part is supplied in bulk packaging.

Availability: All substitute parts maintain active inventory status with quantities ranging from 748 to 1035 pieces, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can 023002.5DRT1SP, 023002.5DRT1P, 023002.5DRT2P, 023002.5DRT2SP, 023002.5DRT3P, 023002.5DRT3SP, and 023002.5MRT1SSP be used interchangeably with 023002.5DRT1SW?

A: Yes. All substitute parts meet the core electrical and mechanical specifications: 2.5 A current rating, 250 V AC voltage rating, slow-blow response, glass cartridge type, axial configuration, and identical physical dimensions (0.177" Dia x 0.571" L). All operate within the -55°C to 125°C temperature range and share the same melting I²t value of 50.

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

A: The main part (023002.5DRT1SW) is obsolete. Substitute parts are active products with enhanced regulatory compliance (ROHS3 compliant, CE certified), specified DC voltage rating (125 V), and Tape & Reel packaging for automated assembly. Breaking capacity specifications differ due to updated testing standards.

Q: Are there packaging differences?

A: Yes. The main part is supplied in bulk packaging. All substitute parts are supplied in Tape & Reel (TR) format, which is standard for automated production environments.

Q: Do substitute parts have the same DC performance?

A: Substitute parts specify 125 V DC rating with 10kA DC breaking capacity. The main part does not specify DC voltage rating or DC breaking capacity, making the substitute parts more suitable for applications requiring defined DC performance.

Q: Which substitute part should I select?

A: All substitute parts are electrically and mechanically equivalent. Selection may be based on inventory availability, packaging requirements, or specific certification needs. Parts 023002.5DRT3SP and 023002.5DRT1SP have the highest inventory levels (955 and 1035 pieces respectively).

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