Littelfuse 0230006.DRT3SW Equivalent & Substitute Parts

Part Overview

The Littelfuse 0230006.DRT3SW is a 6 A, 125 VAC axial glass cartridge fuse with slow-blow response characteristics. This part is classified as obsolete, making substitute parts necessary for ongoing design support and procurement. The 230 series fuses in this specification are widely used in industrial and consumer electronics applications requiring overcurrent protection in AC circuits. Equivalent substitute parts maintain identical electrical and mechanical parameters while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Current Rating	6 A
Voltage Rating (AC)	125 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)
Breaking Capacity @ Rated Voltage	400 A
Melting I²t	380
DC Cold Resistance	0.014 Ohms
Operating Temperature Range	-55°C ~ 125°C
Series	230

Substitute Part Grouping Explanation

Substitute parts for the 0230006.DRT3SW are qualified based on the following critical parameters that determine functional equivalence:

Current Rating: 6 A (exact match required)
Voltage Rating: 125 V AC minimum (125 V AC/DC acceptable)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (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)
Breaking Capacity: 400 A (exact match required)
Melting I²t: 380 (exact match required)

All substitute parts listed maintain these parameters identically. Differences in packaging format (Tape & Reel vs. bulk), product status (Active vs. Obsolete), and compliance certifications do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage Rating (AC)	Voltage Rating (DC)	Response Time	Breaking Capacity	Melting I²t	DC Cold Resistance	Product Status	Packaging	RoHS Status	Inventory
0230006.DRT3SW	Littelfuse Inc.	6 A	125 V	—	Slow Blow	400 A	380	0.014 Ohms	Obsolete	—	RoHS non-compliant	957 Pcs
0230006.DRT3SP	Littelfuse Inc.	6 A	125 V	125 V	Slow Blow	400 A	380	0.0141 Ohms	Active	Tape & Reel (TR)	ROHS3 Compliant	1066 Pcs
0230006.DRT1P	Littelfuse	6 A	125 V	125 V	Slow Blow	400 A	380	0.0141 Ohms	Active	Tape & Reel (TR)	ROHS3 Compliant	954 Pcs
0230006.DRT1SP	Littelfuse Inc.	6 A	125 V	125 V	Slow Blow	400 A	380	0.0141 Ohms	Active	Tape & Reel (TR)	ROHS3 Compliant	1182 Pcs
0230006.DRT2P	Littelfuse Inc.	6 A	125 V	125 V	Slow Blow	400 A	380	0.0141 Ohms	Active	Tape & Reel (TR)	ROHS3 Compliant	703 Pcs
0230006.DRT2SP	Littelfuse Inc.	6 A	125 V	125 V	Slow Blow	400 A	380	0.0141 Ohms	Active	Tape & Reel (TR)	ROHS3 Compliant	1047 Pcs
0230006.DRT3P	Littelfuse Inc.	6 A	125 V	125 V	Slow Blow	400 A	380	0.0141 Ohms	Active	Tape & Reel (TR)	ROHS3 Compliant	986 Pcs
0230006.MRT1SSP	Littelfuse Inc.	6 A	125 V	125 V	Slow Blow	400 A	380	0.0141 Ohms	Active	Tape & Reel (TR)	ROHS3 Compliant	713 Pcs

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the 0230006.DRT3SW. Selection among substitutes should be based on the following factors:

Product Status: All substitute parts carry Active status, ensuring long-term availability and manufacturing support compared to the Obsolete main part.

Compliance: All substitute parts are ROHS3 compliant and carry expanded approval certifications (CE, CSA, PSE, UL) compared to the main part (cUL, METI). This expanded certification scope provides greater design flexibility for international applications.

Packaging: All substitutes are supplied in Tape & Reel (TR) format, suitable for automated assembly processes. The main part packaging format is not specified, but TR packaging is standard for high-volume production environments.

DC Voltage Rating: Substitute parts are rated for 125 V DC in addition to 125 V AC, providing broader application flexibility. The main part specifies AC only.

Inventory Availability: Substitute parts show consistent stock levels ranging from 703 to 1182 pieces, supporting procurement planning for both prototype and production volumes.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the 0230006.DRT3SW?

A: Yes. All listed substitute parts maintain identical electrical parameters (6 A, 125 V, slow-blow response, 400 A breaking capacity, 380 melting I²t) and mechanical dimensions (0.177" Dia x 0.571" L). They are functionally equivalent for circuit protection applications.

Q: What is the difference between the DRT and MRT variants?

A: The provided data specifies only the part numbers and their electrical/mechanical parameters. Both DRT and MRT variants in this list maintain identical electrical and mechanical specifications. Variant designation differences do not affect substitution eligibility.

Q: Why do substitute parts have DC voltage ratings when the main part does not?

A: Substitute parts are rated for both 125 V AC and 125 V DC operation. The main part specifies AC only. This expanded DC rating in substitutes does not affect AC circuit compatibility and provides additional application flexibility.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) packaging is a delivery and handling format only. It does not alter the electrical or mechanical characteristics of the fuse cartridge itself. TR packaging is standard for automated assembly environments.

Q: Are there any compliance differences I should consider?

A: Substitute parts carry expanded certifications (CE, CSA, PSE, UL) and ROHS3 compliance status compared to the main part (cUL, METI, RoHS non-compliant). These certifications support broader market applications and regulatory requirements.

Q: What is the significance of the DC Cold Resistance specification?

A: DC Cold Resistance (0.014 Ohms for the main part, 0.0141 Ohms for substitutes) represents the fuse element resistance at room temperature. The minimal difference (0.0001 Ohms) is negligible for circuit operation and does not affect substitution compatibility.

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