UF3003-T Equivalent & Substitute Parts

Part Overview

The UF3003-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 200 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing applications. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available package and technology options.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	200 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 200 V
Mounting Type	Through Hole
Package / Case	DO-201AD, Axial
Operating Temperature - Junction	-65°C ~ 150°C
Technology	Standard
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UF3003-T is determined by the following critical parameters:

Mandatory Electrical Compatibility:

Voltage - DC Reverse (Vr) (Max): 200 V minimum
Current - Average Rectified (Io): 3 A minimum
Operating Temperature - Junction: Must encompass application requirements within -65°C to 150°C range

Package Compatibility:

Primary substitutes maintain DO-201AD axial through-hole package for direct mechanical and electrical interchange
Secondary substitutes utilize alternative axial packages (SOD-64, B Axial) with equivalent footprint compatibility

Technology Considerations:

Standard recovery diodes provide baseline substitution
Fast recovery and avalanche technology variants are acceptable where reverse recovery time and leakage current specifications are met or exceeded

Compliance Requirements:

RoHS3 compliance preferred for new designs
REACH compliance status documented for supply chain continuity

Substitute parts are grouped into three categories: direct electrical equivalents in DO-201AD packaging, functionally equivalent parts in alternative axial packages, and active production alternatives with enhanced specifications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Package	Status	RoHS
UF3003-T	Diodes Incorporated	200 V	3 A	1 V @ 3 A	50 ns	5 µA @ 200 V	DO-201AD	Obsolete	ROHS3
EGP30D	onsemi	200 V	3 A	950 mV @ 3 A	50 ns	5 µA @ 200 V	DO-201AD	Not For New Designs	ROHS3
1N5187	Microchip Technology	200 V	3 A	1.5 V @ 9 A	200 ns	2 µA @ 200 V	B, Axial	Active	Non-compliant
1N5402-E3/54	Vishay General Semiconductor - Diodes Division	200 V	3 A	1.2 V @ 3 A	—	5 µA @ 200 V	DO-201AD	Active	ROHS3
1N5402-G	Comchip Technology	200 V	3 A	1 V @ 3 A	—	5 µA @ 200 V	DO-201AD	Active	ROHS3
1N5417	Microchip Technology	200 V	3 A	1.5 V @ 9 A	150 ns	1 µA @ 200 V	Axial	Active	Non-compliant
1N5417-TAP	Vishay General Semiconductor - Diodes Division	200 V	3 A	1.5 V @ 9 A	100 ns	1 µA @ 200 V	SOD-64	Active	ROHS3
1N5624-TAP	Vishay General Semiconductor - Diodes Division	200 V	3 A	1 V @ 3 A	7.5 µs	1 µA @ 200 V	SOD-64	Active	ROHS3
1N5624-TR	Vishay General Semiconductor - Diodes Division	200 V	3 A	1 V @ 3 A	7.5 µs	1 µA @ 200 V	SOD-64	Active	ROHS3
BY251P-E3/54	Vishay General Semiconductor - Diodes Division	200 V	3 A	1.1 V @ 3 A	3 µs	5 µA @ 200 V	DO-201AD	Active	ROHS3
BY251P-E3/73	Vishay General Semiconductor - Diodes Division	200 V	3 A	1.1 V @ 3 A	3 µs	5 µA @ 200 V	DO-201AD	Active	ROHS3

Engineering Selection Recommendations

Direct Replacement (DO-201AD Package):

The EGP30D (onsemi) provides the closest electrical match to the UF3003-T with identical voltage and current ratings, matching reverse recovery time of 50 ns, and equivalent reverse leakage current. However, EGP30D carries "Not For New Designs" status. For active production applications, 1N5402-E3/54 (Vishay) and 1N5402-G (Comchip) are preferred alternatives, both with active product status and ROHS3 compliance. The 1N5402-G offers forward voltage matching at 1 V @ 3 A, identical to the original specification.

Alternative Package Options (Axial):

1N5417-TAP and 1N5624-TAP (both Vishay, SOD-64 package) provide active alternatives with ROHS3 compliance. These parts maintain 200 V / 3 A ratings and are suitable where SOD-64 axial package compatibility exists. The 1N5624-TAP and 1N5624-TR offer identical forward voltage to the original part (1 V @ 3 A) with enhanced reverse leakage performance (1 µA @ 200 V).

Compliance Considerations:

For applications requiring RoHS3 compliance, select from: EGP30D, 1N5402-E3/54, 1N5402-G, 1N5417-TAP, 1N5624-TAP, 1N5624-TR, BY251P-E3/54, or BY251P-E3/73. Parts 1N5187 and 1N5417 (Microchip) are RoHS non-compliant and unsuitable for restricted substance applications.

Inventory and Availability:

1N5624-TR (Vishay) offers the highest inventory level (15,288 pcs) among active alternatives. EGP30D (onsemi) provides 25,400 pcs but carries obsolescence risk due to "Not For New Designs" status.

Frequently Asked Questions (FAQ)

Q: Can the EGP30D directly replace the UF3003-T?

A: Electrically, yes. The EGP30D matches all critical parameters: 200 V reverse voltage, 3 A current rating, 50 ns reverse recovery time, and DO-201AD package. However, EGP30D is designated "Not For New Designs," indicating limited future availability. For new designs, use 1N5402-G or 1N5402-E3/54 instead.

Q: What is the difference between 1N5402-E3/54 and 1N5402-G?

A: Both parts share the same base number (1N5402) and electrical ratings (200 V, 3 A, DO-201AD package). The primary differences are manufacturer (Vishay vs. Comchip), packaging format (Cut Tape vs. Tape & Box), and forward voltage specification (1.2 V @ 3 A vs. 1 V @ 3 A). The 1N5402-G provides closer forward voltage matching to the original UF3003-T.

Q: Are SOD-64 package parts (1N5624-TAP, 1N5624-TR) compatible with DO-201AD footprints?

A: Both SOD-64 and DO-201AD are axial through-hole packages with similar lead spacing. Physical compatibility depends on specific PCB layout and hole positioning. Verify footprint dimensions before substitution. SOD-64 parts are generally smaller than DO-201AD.

Q: Why do some parts list higher forward voltage (1.5 V @ 9 A) instead of @ 3 A?

A: Forward voltage varies with current. Parts like 1N5187 and 1N5417 specify Vf at 9 A rather than 3 A. At the application's 3 A operating point, actual forward voltage will be lower than the specified 1.5 V value. Consult manufacturer datasheets for Vf vs. If curves for precise values at 3 A.

Q: What does "Fast Recovery =< 500ns, > 200mA (Io)" mean?

A: This indicates reverse recovery time classification. Fast recovery diodes have trr ≤ 500 ns when reverse current exceeds 200 mA. This specification affects switching speed and is relevant for high-frequency applications. Standard recovery diodes have trr > 500 ns.

Q: Is the 1N5417 suitable as a replacement despite RoHS non-compliance?

A: The 1N5417 meets all electrical specifications (200 V, 3 A, fast recovery) and is actively produced. However, RoHS non-compliance restricts use in applications subject to RoHS regulations (EU, California, etc.). Verify regulatory requirements before selection. ROHS3-compliant alternatives exist (1N5417-TAP).

Q: What is the significance of reverse leakage current differences (1 µA vs. 5 µA)?

A: Lower reverse leakage current indicates better diode quality and reduced power dissipation in reverse bias. Parts with 1 µA leakage (1N5417, 1N5417-TAP, 1N5624-TAP, 1N5624-TR) perform better in low-current or high-impedance circuits. For standard applications, 5 µA leakage is acceptable.

Q: Can I use BY251P parts as substitutes?

A: Yes. BY251P-E3/54 and BY251P-E3/73 meet voltage and current requirements (200 V, 3 A, DO-201AD package) with ROHS3 compliance and active status. Forward voltage is 1.1 V @ 3 A, slightly higher than the original 1 V. Reverse recovery time is 3 µs (standard recovery), slower than the original 50 ns. Use where switching speed is not critical.

Q: What packaging options are available for substitutes?

A: Substitutes are available in three axial through-hole package types: DO-201AD (1N5402-E3/54, 1N5402-G, BY251P-E3/54, BY251P-E3/73), SOD-64 (1N5417-TAP, 1N5624-TAP, 1N5624-TR), and B Axial (1N5187, 1N5417). All maintain through-hole mounting. Select based on PCB footprint compatibility.

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