Littelfuse 0230002.DRT2SW Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0230002.DRT2SW is a 2 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 from the Littelfuse 230 series are available in active product status with enhanced compliance certifications and DC voltage ratings, providing direct functional replacement options for new designs and legacy system updates.

Key Parameters

Parameter	Value
Current Rating	2 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	30
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitute parts for the 0230002.DRT2SW are qualified based on the following critical parameters:

Current Rating: 2 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)
Physical Dimensions: 0.177" Dia x 0.571" L / 4.50mm x 14.50mm (exact match required)
Melting I²t: 30 (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)

All substitute parts listed below meet these criteria. The primary differences among substitutes are packaging format (Tape & Reel vs. Cut Tape), product status (Active vs. Obsolete), and compliance certifications (RoHS3 compliance and DC voltage rating availability).

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Breaking Capacity AC	Breaking Capacity DC	DC Cold Resistance (Ω)	Product Status	Packaging	RoHS Status	Inventory (Pcs)
0230002.DRT2SW	Littelfuse Inc.	2	250	—	Slow Blow	100A	—	0.0692	Obsolete	—	RoHS non-compliant	961
0230002.DRT2SP	Littelfuse Inc.	2	250	125	Slow Blow	35A	10kA	0.0698	Active	Tape & Reel (TR)	ROHS3 Compliant	1069
0230002.DRT1P	Littelfuse Inc.	2	250	125	Slow Blow	35A	10kA	0.0698	Active	Cut Tape (CT)	ROHS3 Compliant	3962
0230002.DRT2P	Littelfuse Inc.	2	250	125	Slow Blow	35A	10kA	0.0698	Active	Tape & Reel (TR)	ROHS3 Compliant	1031
0230002.DRT3P	Littelfuse Inc.	2	250	125	Slow Blow	35A	10kA	0.0698	Active	Tape & Reel (TR)	ROHS3 Compliant	1407
0230002.DRT3SP	Littelfuse Inc.	2	250	125	Slow Blow	35A	10kA	0.0698	Active	Tape & Reel (TR)	ROHS3 Compliant	778
0230002.MRT1SSP	Littelfuse Inc.	2	250	125	Slow Blow	35A	10kA	0.0698	Active	Tape & Reel (TR)	ROHS3 Compliant	694

Engineering Selection Recommendations

All listed substitute parts are functionally equivalent to the 0230002.DRT2SW across critical electrical and mechanical parameters. Selection among substitutes should be based on the following factors:

Product Status: All substitute parts carry Active product status, ensuring long-term availability and continued manufacturer support, in contrast to the Obsolete status of the original part.

Compliance Certifications: Substitute parts are ROHS3 compliant and carry expanded approval certifications (CE, CSA, PSE, UL) compared to the original part (CSA, METI, UL). The original part is RoHS non-compliant.

DC Voltage Rating: Substitute parts include a 125 V DC rating, providing expanded application flexibility for designs requiring DC circuit protection. The original part specifies AC voltage only.

Packaging Format: Selection between Tape & Reel (TR) and Cut Tape (CT) packaging depends on assembly process requirements. The 0230002.DRT1P offers Cut Tape packaging with the highest inventory level (3962 Pcs).

Inventory Availability: All substitute parts maintain active inventory. The 0230002.DRT1P provides the highest stock level for immediate procurement.

Frequently Asked Questions (FAQ)

Q: Can the 0230002.DRT2SW be directly replaced with any of the listed substitute parts?

A: Yes. All substitute parts meet the critical electrical and mechanical parameters of the original part: 2 A current rating, 250 V AC voltage rating, slow-blow response, glass cartridge construction, and identical physical dimensions (0.177" Dia x 0.571" L). The primary differences are product status, compliance certifications, and packaging format.

Q: What is the significance of the DC voltage rating on substitute parts?

A: Substitute parts include a 125 V DC rating, which the original part does not specify. This provides additional application flexibility for circuits requiring DC protection. In AC-only applications, this parameter does not affect compatibility.

Q: How do packaging formats differ among substitutes?

A: The 0230002.DRT1P is supplied in Cut Tape (CT) format, suitable for manual or semi-automated assembly. All other substitutes are supplied in Tape & Reel (TR) format, optimized for automated pick-and-place assembly. Both formats contain identical components; selection depends on assembly process requirements.

Q: Why is the original part classified as Obsolete?

A: The 0230002.DRT2SW is obsolete due to the availability of functionally superior active alternatives with enhanced compliance certifications (ROHS3 compliance, expanded approval agencies) and extended DC voltage ratings. Littelfuse recommends transitioning to active substitute parts for new designs and legacy system updates.

Q: Are there differences in breaking capacity between the original and substitute parts?

A: Yes. The original part specifies 100A breaking capacity at rated voltage. Substitute parts specify 35A AC and 10kA DC breaking capacity. These differences reflect updated testing standards and certification requirements. Verify breaking capacity requirements for your specific application.

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

A: All substitute parts are electrically and mechanically identical. Differences are limited to packaging format (Tape & Reel vs. Cut Tape) and internal Littelfuse product line designations. Selection should be based on packaging compatibility with your assembly process and inventory availability.

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