Littelfuse 0224.375DRT3W Equivalent & Substitute Parts

Part Overview

The Littelfuse 0224.375DRT3W is a 375 mA, 250 V AC fast-blow glass cartridge fuse in 2AG package format (5mm x 15mm axial). This part is classified as obsolete, making equivalent substitutes necessary for ongoing circuit protection applications. The main part is available in bulk packaging, while active alternatives are supplied in tape and reel format for automated assembly processes.

Key Parameters

Parameter	Value
Current Rating	375 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm (Axial)
Response Time	Fast Blow
Mounting Type	Through Hole
Operating Temperature Range	-55°C ~ 125°C
Melting I²t	0.171
DC Cold Resistance	0.395 Ohms

Substitute Part Grouping Explanation

Substitution for the 0224.375DRT3W is determined by strict equivalence in the following parameters:

Current Rating: 375 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 2AG, 5mm x 15mm (Axial) (exact match required)
Response Time: Fast Blow (exact match required)
Melting I²t: 0.171 (exact match required)
DC Cold Resistance: 0.395 Ohms (exact match required)

The substitute parts listed below meet all these electrical and mechanical parameters. The primary distinction between the main part and substitutes is product status (obsolete vs. active) and packaging format (bulk vs. tape and reel).

Parameter Comparison

Parameter	0224.375DRT3W	0224.375DRT3P	0224.375DRT1P	0224.375DRT2P
Current Rating (Amps)	375 mA	375 mA	375 mA	375 mA
Voltage Rating - AC	250 V	250 V	250 V	250 V
Voltage Rating - DC	Not specified	125 V	125 V	125 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm (Axial)	2AG, 5mm x 15mm (Axial)	2AG, 5mm x 15mm (Axial)	2AG, 5mm x 15mm (Axial)
Response Time	Fast Blow	Fast Blow	Fast Blow	Fast Blow
Breaking Capacity @ Rated Voltage	35A	35A AC, 10kA DC	35A AC, 10kA DC	35A AC, 10kA DC
Melting I²t	0.171	0.171	0.171	0.171
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
DC Cold Resistance	0.395 Ohms	0.395 Ohms	0.395 Ohms	0.395 Ohms
Product Status	Obsolete	Active	Active	Active
Packaging	Bulk	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CSA, UL	CE, CSA, UL	CE, CSA, UL	CE, CSA, UL

Engineering Selection Recommendations

All three substitute parts (0224.375DRT3P, 0224.375DRT1P, 0224.375DRT2P) are electrically and mechanically equivalent to the 0224.375DRT3W and are suitable for direct replacement in circuit protection applications requiring 375 mA, 250 V AC fast-blow fuse cartridges in 2AG package format.

The substitute parts offer the following advantages over the main part:

Active product status ensures continued availability and supply chain reliability
ROHS3 compliance meets current environmental and regulatory requirements
Enhanced approval certifications (CE, CSA, UL) provide broader market acceptance
Tape and reel packaging supports automated assembly processes
Specified DC voltage rating (125 V) provides additional application flexibility

Selection among the three substitute parts should be based on packaging requirements and inventory availability, as all three are electrically and mechanically identical.

Frequently Asked Questions (FAQ)

Q: Can the 0224.375DRT3P, 0224.375DRT1P, or 0224.375DRT2P be used as direct replacements for the 0224.375DRT3W?

A: Yes. All three parts are electrically and mechanically equivalent. They share identical current ratings (375 mA), AC voltage ratings (250 V), fuse type (cartridge, glass), package format (2AG, 5mm x 15mm axial), response time (fast blow), and thermal characteristics (melting I²t of 0.171).

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

A: The main part (0224.375DRT3W) is obsolete and supplied in bulk packaging. The substitute parts are active products supplied in tape and reel format. Additionally, the substitutes are ROHS3 compliant and carry CE certification in addition to CSA and UL approvals.

Q: Are there any electrical performance differences between these parts?

A: No. All parts have identical electrical characteristics: 375 mA current rating, 250 V AC voltage rating, 0.171 melting I²t, 0.395 Ohms DC cold resistance, and -55°C to 125°C operating temperature range.

Q: Does the tape and reel packaging affect electrical performance?

A: No. Packaging format does not affect electrical or mechanical performance. Tape and reel packaging is used for automated assembly processes and does not alter the fuse's functional characteristics.

Q: Are the substitute parts suitable for both AC and DC applications?

A: The substitute parts are rated for 250 V AC and 125 V DC. The main part specification does not include a DC voltage rating. For DC applications, the 125 V DC rating of the substitute parts applies.

Q: What certifications do the substitute parts carry?

A: The substitute parts carry CE, CSA, and UL approvals. The main part carries CSA and UL approvals only.

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