UF3003-G Equivalent & Substitute Parts

Part Overview

The UF3003-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 200 V DC reverse voltage and 3 A average rectified current in a through-hole DO-27 axial package. This component is classified as Active product status and features fast recovery characteristics with a reverse recovery time of 50 ns, making it suitable for standard rectification applications requiring rapid switching performance.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements mandate alternative packaging formats or thermal specifications. The parts listed below maintain electrical equivalence across the critical parameters that define rectifier diode functionality.

Substiute Parts

UF3003-G

Comchip TechnologyIn Stock: 1105UF3003-G Datasheet

Current PartRFQ

1N5402G

Taiwan Semiconductor CorporationIn Stock: 21461N5402G Datasheet

MFR RecommendedRFQ

1N5402RLG

onsemiIn Stock: 37191N5402RLG Datasheet

MFR RecommendedRFQ

BY251P-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 6175BY251P-E3/54 Datasheet

MFR RecommendedRFQ

EGP30D

onsemiIn Stock: 25502EGP30D Datasheet

MFR RecommendedRFQ

UF5402-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 2959UF5402-E3/54 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the UF3003-G is based on maintaining electrical equivalence across five critical parameters: reverse voltage rating (200 V minimum), average rectified current (3 A minimum), forward voltage drop characteristics, recovery speed classification, and through-hole axial mounting compatibility.

All substitute parts listed maintain the 200 V / 3 A electrical specification. However, substitutes differ in three key areas:

Recovery Speed Classification: The UF3003-G features fast recovery (≤ 500ns, trr = 50 ns). Substitute parts are categorized as either fast recovery (UF5402-E3/54, EGP30D) or standard recovery (1N5402G, 1N5402RLG, BY251P-E3/54). Standard recovery parts exhibit longer reverse recovery times (typically > 500ns or 3 µs) and are electrically equivalent for applications not requiring fast switching performance.

Package Format: The UF3003-G uses DO-27 axial packaging. Substitute parts employ DO-201AD or DO-201AA axial packages, which are mechanically compatible with through-hole PCB layouts but may differ in physical dimensions and lead spacing.

Operating Temperature Range: The UF3003-G operates from -55°C to 125°C. Some substitutes extend the upper limit to 150°C (1N5402G, 1N5402RLG, BY251P-E3/54, EGP30D), providing enhanced thermal margin in high-temperature environments.

Product Status: The UF3003-G maintains Active status. Substitutes 1N5402RLG and EGP30D carry "Not For New Designs" status, indicating these parts are suitable for replacement applications but not recommended for new product development.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status Applications:

Select from 1N5402G, BY251P-E3/54, or UF5402-E3/54 when designing new products or requiring long-term supply assurance. These parts carry Active product status and are supported by manufacturers for ongoing production.

1N5402G offers the widest operating temperature range (-55°C to 150°C) and highest inventory availability (2110 pcs), making it suitable for general-purpose replacement in standard recovery applications.

BY251P-E3/54 provides standard recovery characteristics with moderate forward voltage (1.1 V @ 3 A) and is available in highest quantity (6079 pcs), supporting high-volume production requirements.

UF5402-E3/54 maintains fast recovery performance matching the UF3003-G (trr = 50 ns) while offering Active status and extended temperature range to 150°C, making it the preferred direct functional equivalent for switching-speed-critical applications.

For Replacement and Maintenance Applications:

1N5402RLG and EGP30D are suitable for field replacement and repair of existing equipment despite "Not For New Designs" status. Both parts maintain full electrical equivalence and regulatory compliance (ROHS3, REACH Unaffected).

EGP30D offers the largest inventory (25400 pcs) and lowest forward voltage (0.95 V @ 3 A), reducing power dissipation in high-current applications. Fast recovery characteristics (trr = 50 ns) match the UF3003-G.

1N5402RLG provides extended temperature range (-65°C to 150°C) and is available in 3659 pcs, suitable for thermal margin applications.

Package Compatibility Considerations:

The UF3003-G uses DO-27 axial packaging. Substitute parts employ DO-201AD or DO-201AA axial packages. All are through-hole axial formats with compatible lead configurations for standard PCB layouts. Physical lead spacing and body dimensions may vary; verify mechanical fit in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute a standard recovery diode (1N5402G, BY251P-E3/54) for the fast recovery UF3003-G?

A: Standard recovery substitutes are electrically equivalent for applications where switching speed is not critical. The UF3003-G features 50 ns reverse recovery time (fast recovery), while standard recovery parts exhibit > 500ns or 3 µs recovery times. In high-frequency switching circuits or applications with tight timing requirements, standard recovery substitutes may introduce switching delays. For DC rectification or low-frequency applications, standard recovery parts are fully compatible.

Q: What is the difference between DO-27 and DO-201AD packaging?

A: Both are through-hole axial diode packages with compatible lead configurations. DO-27 and DO-201AD differ in physical body dimensions and lead spacing. Verify mechanical fit in your PCB layout before substitution. All listed substitutes use axial through-hole formats suitable for standard PCB drilling patterns.

Q: Why do some substitutes have higher operating temperature limits (150°C vs. 125°C)?

A: The UF3003-G operates to 125°C junction temperature. Substitutes 1N5402G, 1N5402RLG, BY251P-E3/54, and EGP30D extend the upper limit to 150°C, providing additional thermal margin. This does not affect electrical equivalence; it indicates the substitute can operate reliably at higher temperatures. Select extended-temperature parts for applications with elevated ambient or junction temperatures.

Q: What does "Not For New Designs" status mean for 1N5402RLG and EGP30D?

A: "Not For New Designs" indicates the manufacturer no longer recommends these parts for new product development but continues to support existing applications. These parts are suitable for field replacement, repair, and maintenance of equipment already in service. For new product designs, select Active-status parts: 1N5402G, BY251P-E3/54, or UF5402-E3/54.

Q: How do I choose between fast recovery (UF5402-E3/54, EGP30D) and standard recovery (1N5402G, BY251P-E3/54) substitutes?

A: Fast recovery diodes (trr ≤ 50 ns) are required for high-frequency switching applications, power factor correction circuits, and applications sensitive to reverse recovery current. Standard recovery diodes (trr > 500ns) are suitable for low-frequency rectification, power supplies operating below 100 kHz, and general-purpose applications. Verify your circuit's switching frequency and recovery time requirements before selecting a substitute.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed (1N5402G, 1N5402RLG, BY251P-E3/54, EGP30D, UF5402-E3/54) are ROHS3 Compliant and REACH Unaffected, matching the UF3003-G regulatory status. All parts carry EAR99 ECCN classification and HTSUS code 8541.10.0080.

Q: Which substitute offers the best inventory availability?

A: EGP30D provides the highest inventory (25400 pcs), followed by BY251P-E3/54 (6079 pcs) and 1N5402RLG (3659 pcs). For immediate availability and high-volume requirements, EGP30D is the optimal choice. For Active-status parts, 1N5402G (2110 pcs) and UF5402-E3/54 (2900 pcs) offer adequate stock levels.