Littelfuse 0224003.DRT3P Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0224003.DRT3P is a 3A 250VAC 125VDC fast-blow glass cartridge fuse in 2AG form factor, designed for through-hole mounting applications. This component is active in production and widely used in power distribution and circuit protection circuits. Equivalent and substitute parts may be required due to packaging availability, inventory constraints, or specific application requirements while maintaining identical electrical and mechanical performance characteristics.

Key Parameters

Parameter	Value
Current Rating	3 A
Voltage Rating - AC	250 V
Voltage Rating - DC	125 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	2AG, 5mm x 15mm (Axial)
Mounting Type	Through Hole
Breaking Capacity @ Rated Voltage	100A AC, 10kA DC
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Approval Agencies	CE, CSA, PSE, UL

Substitute Part Grouping Explanation

Substitute parts for the 0224003.DRT3P are classified based on electrical and mechanical parameter equivalence. The primary substitution criteria are:

Electrical Parameters (Must Match):

Current Rating: 3 A
Voltage Rating - AC: 250 V
Voltage Rating - DC: 125 V
Response Time: Fast Blow
Breaking Capacity: 100A AC minimum

Mechanical Parameters (Must Match):

Fuse Type: Cartridge, Glass
Package / Case: 2AG form factor
Mounting Type: Through Hole
Physical dimensions compatible with 2AG specification

Compliance Parameters:

RoHS3 Compliant
UL and CSA certifications required

Substitutes are grouped into two categories: parametric equivalents (identical electrical and mechanical specifications with different packaging) and direct manufacturer alternatives (equivalent performance from different manufacturers with minor dimensional tolerances).

Parameter Comparison

Parameter	0224003.DRT3P (Main)	0224003.DRT1P (Parametric Equivalent)	BK/C518-3-R (Direct Alternative)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Eaton - Electronics Division
Current Rating (Amps)	3 A	3 A	3 A
Voltage Rating - AC	250 V	250 V	250 V
Voltage Rating - DC	125 V	125 V	Not specified
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Fast Blow	Fast Blow	Fast Blow
Package / Case	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm
Mounting Type	Through Hole	Through Hole	Through Hole
Breaking Capacity @ Rated Voltage	100A AC, 10kA DC	100A AC, 10kA DC	100A AC
Melting I²t	4.62	4.62	6.1
DC Cold Resistance (Ohms)	0.0317	0.0317	0.038
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	Not specified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agencies	CE, CSA, PSE, UL	CE, CSA, PSE, UL	CSA, UL
Packaging Type	Tape & Reel (TR)	Cut Tape (CT)	Bulk

Engineering Selection Recommendations

0224003.DRT1P (Littelfuse Inc.) is the primary parametric equivalent. This part maintains identical electrical specifications, breaking capacity, melting I²t, DC cold resistance, operating temperature range, and approval certifications as the 0224003.DRT3P. The only difference is packaging format (Cut Tape versus Tape & Reel). This substitute is suitable for direct replacement in all applications where the main part is specified.

BK/C518-3-R (Eaton - Electronics Division) is a direct manufacturer alternative that meets core electrical requirements (3A, 250VAC, Fast Blow, 2AG form factor) and holds CSA and UL certifications. However, this part exhibits measurable differences in melting I²t (6.1 versus 4.62) and DC cold resistance (0.038 versus 0.0317 Ohms), indicating different thermal and electrical characteristics. DC voltage rating is not specified for this part. Selection of this alternative requires confirmation that application parameters accommodate these performance variations.

Frequently Asked Questions (FAQ)

Q: Can 0224003.DRT1P be used as a direct replacement for 0224003.DRT3P?

A: Yes. Both parts are manufactured by Littelfuse Inc. and share identical electrical ratings (3A, 250VAC, 125VDC), response time (Fast Blow), breaking capacity (100A AC, 10kA DC), melting I²t (4.62), DC cold resistance (0.0317 Ohms), operating temperature range (-55°C ~ 125°C), and certifications (CE, CSA, PSE, UL). The difference is packaging: 0224003.DRT3P is supplied in Tape & Reel format, while 0224003.DRT1P is supplied in Cut Tape format. Both are suitable for through-hole mounting in 2AG applications.

Q: What are the key differences between the Littelfuse and Eaton alternatives?

A: The Littelfuse 0224003.DRT1P is electrically and mechanically identical to the main part. The Eaton BK/C518-3-R meets the primary electrical requirements (3A, 250VAC, Fast Blow, 2AG) but differs in melting I²t (6.1 versus 4.62) and DC cold resistance (0.038 versus 0.0317 Ohms). The Eaton part does not specify a DC voltage rating. These differences indicate different thermal response characteristics and may affect circuit protection timing in specific applications.

Q: Is the Eaton BK/C518-3-R suitable for all applications using the 0224003.DRT3P?

A: The Eaton part meets core AC voltage and current specifications and holds UL and CSA certifications. However, the higher melting I²t and DC cold resistance values indicate different thermal and electrical behavior. Applications requiring precise thermal response characteristics or DC voltage specifications should use the Littelfuse 0224003.DRT1P instead.

Q: What packaging formats are available?

A: The 0224003.DRT3P is supplied in Tape & Reel (TR) format for automated assembly. The 0224003.DRT1P is supplied in Cut Tape (CT) format. The Eaton BK/C518-3-R is supplied in Bulk packaging. All three parts use the same 2AG through-hole form factor and are compatible with standard fuse holder designs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The 0224003.DRT3P, 0224003.DRT1P, and BK/C518-3-R are all ROHS3 Compliant and REACH Unaffected, meeting environmental regulatory requirements for electronic components.

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