B0520WS-7 Schottky Diode Equivalent & Substitute Parts

Part Overview

The B0520WS-7 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 20 V DC reverse voltage and 500 mA average rectified current in a surface mount SOD-323 package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with modified parameters within acceptable operating ranges.

Key Parameters

Parameter	B0520WS-7 Specification
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	500 mA
Voltage - Forward (Vf) (Max) @ If	430 mV @ 500 mA
Technology	Schottky
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	250 µA @ 20 V
Capacitance @ Vr, F	58 pF @ 0 V, 1 MHz
Package / Case	SC-76, SOD-323
Operating Temperature - Junction	-55°C ~ 125°C
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the B0520WS-7 is determined by the following critical parameters: reverse voltage rating (20 V maximum), average rectified current capacity, forward voltage drop characteristics, package form factor (SOD-323 or compatible), and operating temperature range. Parts are grouped into three categories based on substitution relationship:

Parametric Equivalent: Parts with identical electrical specifications and the same package type, differing only in product status or packaging format.

Current-Rated Substitutes: Parts with 20 V reverse voltage rating and SOD-323 package but with different current ratings (500 mA to 2 A), suitable for applications where higher current capacity is acceptable.

Package-Variant Substitutes: Parts with matching electrical specifications but alternative surface mount packages (SOD-123), applicable where PCB layout permits package variation.

The following parameters determine substitution validity:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 20 V
Package / Case: SOD-323 or compatible surface mount variant
Technology: Schottky rectifier
Mounting Type: Surface Mount
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (Avg Rectified)	Vf (Max) @ If	Package	Temp Range	Product Status	RoHS Status
B0520WS-7	Diodes Incorporated	20 V	500 mA	430 mV @ 500 mA	SOD-323	-55°C ~ 125°C	Discontinued	Non-compliant
B0520WS-7-F	Diodes Incorporated	20 V	500 mA	430 mV @ 500 mA	SOD-323	-55°C ~ 125°C	Active	ROHS3 Compliant
BAT760,115	Nexperia USA Inc.	20 V	1 A	550 mV @ 1 A	SOD-323	-55°C ~ 125°C	Active	ROHS3 Compliant
MBR0520-TP	Micro Commercial Co	20 V	500 mA	450 mV @ 500 mA	SOD-123	-65°C ~ 125°C	Active	ROHS3 Compliant
PMEG2005AEA,115	Nexperia USA Inc.	20 V	500 mA	390 mV @ 500 mA	SOD-323	-55°C ~ 150°C	Active	ROHS3 Compliant
PMEG2010BEA,115	Nexperia USA Inc.	20 V	1 A	500 mV @ 1 A	SOD-323	-65°C ~ 150°C	Active	ROHS3 Compliant
PMEG2010EA,115	Nexperia USA Inc.	20 V	1 A	550 mV @ 1 A	SOD-323	-55°C ~ 125°C	Active	ROHS3 Compliant
PMEG2015EA,115	Nexperia USA Inc.	20 V	1.5 A	660 mV @ 1.5 A	SOD-323	-65°C ~ 125°C	Active	ROHS3 Compliant
PMEG2020AEA,115	Nexperia USA Inc.	20 V	2 A	525 mV @ 2 A	SOD-323	-65°C ~ 150°C	Active	ROHS3 Compliant
SBA0820CS_R1_00001	Panjit International Inc.	20 V	800 mA	550 mV @ 800 mA	SOD-323	-55°C ~ 150°C	Active	ROHS3 Compliant
SD103CWS-E3-08	Vishay General Semiconductor	20 V	350 mA	600 mV @ 200 mA	SOD-323	-55°C ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

B0520WS-7-F is the direct parametric equivalent with identical electrical specifications and SOD-323 package. This part is currently active with ROHS3 compliance, addressing the discontinuation status of the original B0520WS-7. Selection of B0520WS-7-F requires no circuit redesign or thermal analysis modifications.

Current-Rated Substitutes (Higher Current Capacity):

Parts rated for 1 A (BAT760,115, PMEG2010EA,115, PMEG2010BEA,115) or higher current (PMEG2015EA,115 at 1.5 A, PMEG2020AEA,115 at 2 A, SBA0820CS_R1_00001 at 800 mA) are suitable for applications where the original 500 mA specification provides design margin. These substitutes maintain 20 V reverse voltage rating and SOD-323 package compatibility. Forward voltage characteristics vary; PMEG2005AEA,115 offers lower forward voltage (390 mV @ 500 mA) compared to the original specification (430 mV @ 500 mA), reducing power dissipation. All listed substitutes carry ROHS3 compliance and active product status.

Package-Variant Substitute:

MBR0520-TP provides identical 500 mA current rating and 20 V reverse voltage in SOD-123 package format. This substitute is applicable only where PCB layout accommodates the alternative package footprint. Extended operating temperature range (-65°C ~ 125°C) provides additional thermal margin.

Current-Limited Substitute:

SD103CWS-E3-08 is rated for 350 mA average rectified current, below the original 500 mA specification. This part is suitable only for applications where circuit current requirements do not exceed 350 mA.

Frequently Asked Questions (FAQ)

Q: Can B0520WS-7-F be used as a direct replacement for B0520WS-7?

A: Yes. B0520WS-7-F is a parametric equivalent with identical voltage rating (20 V), current rating (500 mA), forward voltage characteristics (430 mV @ 500 mA), and SOD-323 package. The primary difference is product status (active versus discontinued) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit modifications are required.

Q: What is the difference between SOD-323 and SOD-123 packages?

A: SOD-323 and SOD-123 are both surface mount diode packages with different physical dimensions and footprints. MBR0520-TP uses SOD-123 package while the original B0520WS-7 uses SOD-323. Substitution with MBR0520-TP requires PCB layout verification to confirm footprint compatibility. Electrical specifications remain equivalent.

Q: Can I use a 1 A rated diode (BAT760,115 or PMEG2010EA,115) in place of the 500 mA B0520WS-7?

A: Yes, provided circuit current requirements do not exceed 500 mA. Higher current-rated diodes are backward compatible with lower current applications. However, forward voltage characteristics differ: BAT760,115 and PMEG2010EA,115 exhibit 550 mV @ 1 A compared to 430 mV @ 500 mA for the original part. Verify that increased forward voltage drop does not impact circuit performance or thermal management.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates conformance to the Restriction of Hazardous Substances Directive 3, restricting specified hazardous materials in electrical and electronic equipment. The original B0520WS-7 is RoHS non-compliant, while all listed substitutes are ROHS3 compliant. This distinction is critical for applications subject to regulatory requirements.

Q: Is PMEG2005AEA,115 a suitable substitute despite lower forward voltage?

A: PMEG2005AEA,115 maintains 20 V reverse voltage and 500 mA current rating with SOD-323 package compatibility. The lower forward voltage (390 mV @ 500 mA versus 430 mV @ 500 mA) reduces power dissipation and heat generation, providing a performance advantage. Extended maximum junction temperature (150°C versus 125°C) offers additional thermal margin. This part is suitable for direct substitution.

Q: Why does SD103CWS-E3-08 have a lower current rating?

A: SD103CWS-E3-08 is rated for 350 mA average rectified current, below the original 500 mA specification. This part is suitable only for applications where actual circuit current does not exceed 350 mA. Use of this part in circuits requiring 500 mA operation will result in device overstress and potential failure.

Q: Are automotive-qualified parts (PMEG2010BEA,115, PMEG2015EA,115, PMEG2020AEA,115) interchangeable with non-automotive parts?

A: Automotive-qualified parts carry AEC-Q100 certification and are designed for automotive applications with enhanced reliability requirements. These parts are functionally interchangeable with non-automotive equivalents in non-automotive applications. Selection of automotive-qualified parts provides additional qualification margin and is appropriate for high-reliability applications.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current varies among substitutes: original B0520WS-7 specifies 250 µA @ 20 V, while PMEG2005AEA,115 and PMEG2010BEA,115 specify 200 µA @ 20 V, and BAT760,115 and PMEG2010EA,115 specify 50 µA @ 15 V. Lower reverse leakage reduces standby power consumption and heat generation. Verify that leakage current specifications meet circuit requirements for low-power or precision applications.

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