MBRX0520-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The MBRX0520-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 20V DC reverse voltage and 500mA average rectified current in a surface mount SOD-323 package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating the same package form factor.

Substiute Parts

MBRX0520-TP

Micro Commercial CoIn Stock: 672MBRX0520-TP Datasheet

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PMEG1020EA,115

Nexperia USA Inc.In Stock: 248237PMEG1020EA,115 Datasheet

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SD103CWS-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1066SD103CWS-E3-18 Datasheet

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SD103CWS-HE3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 820SD103CWS-HE3-18 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRX0520-TP is determined by the following critical parameters:

Voltage Compatibility: Substitute parts must support a minimum DC reverse voltage (Vr) equal to or greater than 20V to maintain circuit protection and reliability.

Current Capacity: Substitute parts must support average rectified current (Io) equal to or greater than 500mA to handle the design load without thermal stress or performance degradation.

Package Compatibility: All substitute parts must use the SOD-323 surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Technology: Schottky diode technology is required to maintain fast recovery characteristics and forward voltage performance consistent with the original design.

Thermal Range: Operating temperature range must encompass the junction temperature limits of -55°C to 125°C.

Compliance: RoHS3 compliance and MSL 1 rating are required for manufacturing and environmental standards alignment.

The substitute parts identified below meet these criteria with varying performance characteristics in current capacity and forward voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

PMEG1020EA,115 (Nexperia USA Inc.): This part is active and AEC-Q100 qualified, providing automotive-grade reliability. However, the 10V maximum reverse voltage rating is below the 20V requirement of the original design. This part is suitable only for applications where the circuit voltage does not exceed 10V. The 2A current capacity exceeds design requirements, and the forward voltage of 460 mV @ 2A is comparable to the original specification.

SD103CWS-E3-18 (Vishay General Semiconductor): This part is active and meets the 20V reverse voltage requirement. The 350mA current rating is below the 500mA specification of the original part, making it suitable for applications with reduced current demands. The forward voltage of 600 mV @ 200mA is higher than the original 450 mV @ 500mA specification. Fast recovery characteristics and operating temperature range align with the original design.

SD103CWS-HE3-18 (Vishay General Semiconductor): This part is active and AEC-Q101 qualified for automotive applications. It meets the 20V reverse voltage requirement with identical electrical specifications to the SD103CWS-E3-18. The 350mA current rating and 600 mV forward voltage apply the same constraints. The automotive qualification provides enhanced reliability for demanding environments.

All substitute parts maintain SOD-323 package compatibility, RoHS3 compliance, and MSL 1 rating. Selection should be based on specific circuit voltage and current requirements relative to the design specifications.

Frequently Asked Questions (FAQ)

Q: Can the PMEG1020EA,115 replace the MBRX0520-TP in all applications?

A: No. The PMEG1020EA,115 has a maximum reverse voltage of 10V, which is insufficient for circuits designed for 20V operation. This part is suitable only for applications operating at 10V or below. The higher current capacity of 2A does not compensate for the voltage limitation.

Q: What is the primary limitation of the SD103CWS-E3-18 and SD103CWS-HE3-18 as substitutes?

A: Both Vishay parts have a maximum average rectified current of 350mA, which is below the 500mA rating of the MBRX0520-TP. These parts are suitable for applications with current demands not exceeding 350mA. Additionally, the forward voltage is higher at 600 mV @ 200mA compared to the original 450 mV @ 500mA.

Q: Are the SD103CWS-E3-18 and SD103CWS-HE3-18 electrically identical?

A: The electrical specifications are identical. The primary difference is that SD103CWS-HE3-18 carries AEC-Q101 automotive qualification, while SD103CWS-E3-18 does not. Selection between these parts depends on automotive compliance requirements.

Q: Do all substitute parts use the same SOD-323 package?

A: Yes. All substitute parts listed use the SC-76, SOD-323 surface mount package, ensuring mechanical compatibility with existing PCB layouts designed for the MBRX0520-TP.

Q: What compliance standards apply to all listed parts?

A: All parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. The PMEG1020EA,115 and SD103CWS-HE3-18 carry additional automotive qualifications (AEC-Q100 and AEC-Q101, respectively).

Q: How do the operating temperature ranges compare?

A: The MBRX0520-TP, SD103CWS-E3-18, and SD103CWS-HE3-18 all operate from -55°C to 125°C junction temperature. The PMEG1020EA,115 specifies a maximum junction temperature of 150°C, providing a wider upper temperature margin.

Q: Which substitute part most closely matches the original MBRX0520-TP specifications?

A: The SD103CWS-HE3-18 provides the closest match in voltage rating (20V) and operating temperature range (-55°C to 125°C). However, the reduced current capacity (350mA vs. 500mA) and higher forward voltage must be evaluated against specific circuit requirements.