Littelfuse 0230006.DRT1SW Glass Axial Fuse 6A 125VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0230006.DRT1SW is a 6A 125VAC slow-blow glass cartridge fuse with axial through-hole mounting. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The substitute parts listed maintain identical electrical and mechanical specifications while offering improved product status and compliance certifications.

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	400A
Melting I²t	380
Operating Temperature Range	-55°C ~ 125°C
DC Cold Resistance	0.014 Ohms

Substitute Part Grouping Explanation

All substitute parts maintain the core electrical and mechanical parameters that define functional equivalence for this fuse category:

Current Rating: 6 A (identical across all substitutes)
Voltage Rating: 125 V AC (main part); 125 V AC / 125 V DC (all substitutes)
Fuse Type: Cartridge, Glass (identical)
Response Time: Slow Blow (identical)
Package / Case: Cartridge, Non-Standard (Axial) (identical)
Mounting Type: Through Hole (identical)
Physical Dimensions: 0.177" Dia x 0.571" L (4.50mm x 14.50mm) (identical)
Breaking Capacity: 400A (identical)
Melting I²t: 380 (identical)
Operating Temperature: -55°C ~ 125°C (identical)

The primary distinction between the main part and substitutes is product status and compliance certifications. The main part (0230006.DRT1SW) is obsolete and RoHS non-compliant. All substitute parts are active products with ROHS3 compliance and enhanced certification coverage (CE, CSA, PSE, UL).

Parameter Comparison

Part Number	Manufacturer	Product Status	Current Rating	Voltage (AC)	Voltage (DC)	Response Time	Mounting	Size	Breaking Capacity	Melting I²t	Operating Temp	DC Resistance	RoHS Status	Certifications	Packaging	Inventory
0230006.DRT1SW	Littelfuse Inc.	Obsolete	6 A	125 V	—	Slow Blow	Through Hole	0.177" x 0.571" (4.50mm x 14.50mm)	400A	380	-55°C ~ 125°C	0.014 Ω	RoHS non-compliant	cUL, METI	—	794 Pcs
0230006.DRT1SP	Littelfuse Inc.	Active	6 A	125 V	125 V	Slow Blow	Through Hole	0.177" x 0.571" (4.50mm x 14.50mm)	400A	380	-55°C ~ 125°C	0.0141 Ω	ROHS3 Compliant	CE, CSA, PSE, UL	Tape & Reel	1182 Pcs
0230006.DRT1P	Littelfuse	Active	6 A	125 V	125 V	Slow Blow	Through Hole	0.177" x 0.571" (4.50mm x 14.50mm)	400A	380	-55°C ~ 125°C	0.0141 Ω	ROHS3 Compliant	CE, CSA, PSE, UL	Tape & Reel	954 Pcs
0230006.DRT2P	Littelfuse Inc.	Active	6 A	125 V	125 V	Slow Blow	Through Hole	0.177" x 0.571" (4.50mm x 14.50mm)	400A	380	-55°C ~ 125°C	0.0141 Ω	ROHS3 Compliant	CE, CSA, PSE, UL	Tape & Reel	703 Pcs
0230006.DRT2SP	Littelfuse Inc.	Active	6 A	125 V	125 V	Slow Blow	Through Hole	0.177" x 0.571" (4.50mm x 14.50mm)	400A	380	-55°C ~ 125°C	0.0141 Ω	ROHS3 Compliant	CE, CSA, PSE, UL	Tape & Reel	1047 Pcs
0230006.DRT3P	Littelfuse Inc.	Active	6 A	125 V	125 V	Slow Blow	Through Hole	0.177" x 0.571" (4.50mm x 14.50mm)	400A	380	-55°C ~ 125°C	0.0141 Ω	ROHS3 Compliant	CE, CSA, PSE, UL	Tape & Reel	986 Pcs
0230006.DRT3SP	Littelfuse Inc.	Active	6 A	125 V	125 V	Slow Blow	Through Hole	0.177" x 0.571" (4.50mm x 14.50mm)	400A	380	-55°C ~ 125°C	0.0141 Ω	ROHS3 Compliant	CE, CSA, PSE, UL	Tape & Reel	1066 Pcs
0230006.MRT1SSP	Littelfuse Inc.	Active	6 A	125 V	125 V	Slow Blow	Through Hole	0.177" x 0.571" (4.50mm x 14.50mm)	400A	380	-55°C ~ 125°C	0.0141 Ω	ROHS3 Compliant	CE, CSA, PSE, UL	Tape & Reel	713 Pcs

Engineering Selection Recommendations

All listed substitute parts are direct functional equivalents to the 0230006.DRT1SW. Selection among the substitute options should be based on the following factors:

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

Compliance and Certifications: All substitute parts are ROHS3 compliant and carry expanded certification coverage (CE, CSA, PSE, UL) versus the main part's limited certifications (cUL, METI). This expanded compliance profile supports broader market applications and regulatory requirements.

DC Voltage Rating: All substitute parts are rated for 125 V DC in addition to 125 V AC, providing enhanced operational flexibility. The main part specifies only 125 V AC.

Packaging: All substitute parts are supplied in Tape & Reel (TR) format, supporting automated assembly processes. The main part packaging format is not specified.

Inventory Availability: Substitute parts show consistent stock levels ranging from 703 to 1182 pieces, providing reliable procurement options.

DC Cold Resistance: Substitute parts specify 0.0141 Ohms versus the main part's 0.014 Ohms, representing a negligible difference within normal manufacturing tolerances.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 0230006.DRT1SW with any of the listed substitute parts?

A: Yes. All substitute parts maintain identical electrical ratings (6A, 125V AC), fuse type (cartridge, glass), response time (slow blow), physical dimensions (0.177" Dia x 0.571" L), breaking capacity (400A), and melting I²t (380). They are mechanically and electrically interchangeable in through-hole applications.

Q: What is the primary reason to transition from 0230006.DRT1SW to a substitute part?

A: The main part is classified as obsolete. Substitute parts are active products with guaranteed manufacturing support, improved compliance certifications (ROHS3, CE, CSA, PSE, UL), and enhanced DC voltage rating (125V DC). These factors ensure long-term design reliability and regulatory compliance.

Q: Are there differences in performance between the substitute parts?

A: No. All substitute parts share identical electrical and mechanical specifications. Differences exist only in part numbering, which reflects internal Littelfuse manufacturing or packaging variants. Selection can be based on inventory availability or packaging preference (all are supplied in Tape & Reel format).

Q: Does the addition of 125V DC rating on substitute parts affect AC-only applications?

A: No. The 125V DC rating is an additional capability that does not alter AC performance. Substitute parts maintain full compatibility with 125V AC circuits.

Q: What packaging format should I specify for automated assembly?

A: All substitute parts are available in Tape & Reel (TR) packaging, which is standard for automated pick-and-place assembly processes.

Q: Are there any thermal or environmental differences between the main part and substitutes?

A: No. All parts share identical operating temperature range (-55°C ~ 125°C) and thermal characteristics.

Q: How do I verify compatibility in my existing design?

A: Verify that your circuit requires a 6A slow-blow fuse rated for 125V AC (or 125V AC/DC), with through-hole axial mounting in a 0.177" Dia x 0.571" L cartridge form factor. All substitute parts meet these criteria.

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