SR520 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SR520 is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 5 A average rectified current in a through-hole DO-201AD axial package. This component is designed for fast recovery applications with switching speeds ≤ 500 ns and forward voltage of 1.05 V at 5 A. Alternative equivalent and substitute parts are necessary to address inventory availability, packaging format requirements, and sourcing flexibility across multiple manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	5	A
Voltage - Forward (Vf) (Max) @ If	1.05	V @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	-
Current - Reverse Leakage @ Vr	100	µA @ 200 V
Mounting Type	Through Hole	-
Package / Case	DO-201AD, Axial	-
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	-

Substitute Part Grouping Explanation

Substitution of Schottky rectifier diodes is determined by electrical parameter equivalence and mechanical compatibility. The critical parameters for SR520 substitution are: (1) Voltage - DC Reverse rating of 200 V, (2) Current - Average Rectified rating of 5 A, (3) Fast Recovery speed characteristic ≤ 500 ns, (4) Through-hole axial mounting configuration, and (5) DO-201AD or compatible DO-201 package format.

Substitute parts are grouped into three categories based on parameter alignment:

Parametric Equivalent (SR520 A0G): Identical electrical specifications and DO-201AD package with packaging format variation (Cut Tape instead of Tape & Reel).

Direct Manufacturer Substitute (SB5200): Equivalent voltage and current ratings with compatible DO-201 package family, manufactured by alternative supplier (Diotec Semiconductor) with minor forward voltage and temperature range variations.

Similar Manufacturer Substitute (SR5200-TP): Matching voltage, current, and package specifications with measurable differences in forward voltage, reverse leakage current, and capacitance characteristics.

Parameter Comparison

Parameter	SR520	SR520 A0G	SB5200	SR5200-TP
Manufacturer	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Diotec Semiconductor	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	5 A	5 A	5 A	5 A
Voltage - Forward (Vf) (Max) @ If	1.05 V @ 5 A	1.05 V @ 5 A	900 mV @ 5 A	950 mV @ 5 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 200 V	100 µA @ 200 V	100 µA @ 200 V	500 µA @ 200 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AA, DO-27, Axial	DO-201AD, Axial
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-50 to 150 °C	-65 to 150 °C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not applicable	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)	-	Cut Tape (CT)
Inventory Status	1440 Pcs New Original In Stock	5451 Pcs New Original In Stock	3690 Pcs New Original In Stock	5011 Pcs New Original In Stock

Engineering Selection Recommendations

SR520 A0G is the primary parametric equivalent for direct substitution. This part maintains identical electrical specifications (200 V, 5 A, 1.05 V forward voltage, 100 µA reverse leakage) and DO-201AD package compatibility. The only difference is packaging format (Cut Tape versus Tape & Reel), which does not affect electrical performance or mechanical fit. Both parts are ROHS3 compliant and manufactured by Taiwan Semiconductor Corporation. This substitute is suitable for applications requiring identical electrical behavior with flexible packaging requirements.

SB5200 (Diotec Semiconductor) provides functional equivalence with measurable electrical differences. Forward voltage is reduced to 900 mV at 5 A (150 mV lower than SR520), which may reduce power dissipation in the application. Reverse leakage current remains at 100 µA. The DO-201 package family is mechanically compatible with DO-201AD. Operating temperature range is -50 to 150 °C (5 °C narrower at the lower limit). RoHS compliance status is not applicable for this part. Selection of SB5200 is appropriate when lower forward voltage characteristics are beneficial and RoHS compliance is not a design requirement.

SR5200-TP (Micro Commercial Co) meets voltage and current specifications with notable parameter variations. Forward voltage is 950 mV at 5 A (100 mV lower than SR520). Reverse leakage current is elevated to 500 µA at 200 V (5× higher than SR520), which increases standby current consumption. Capacitance is specified at 400 pF @ 4 V, 1 MHz. Operating temperature range extends to -65 °C (10 °C lower than SR520). This part is ROHS3 compliant. SR5200-TP is suitable for applications with extended low-temperature requirements and where elevated reverse leakage current is acceptable.

Selection among these substitutes depends on specific application requirements: identical electrical performance (SR520 A0G), reduced forward voltage dissipation (SB5200), or extended temperature range (SR5200-TP).

Frequently Asked Questions (FAQ)

Q: Can SR520 A0G be used as a direct replacement for SR520?

A: Yes. SR520 A0G is a parametric equivalent with identical electrical specifications (200 V, 5 A, 1.05 V forward voltage, 100 µA reverse leakage) and DO-201AD package. The only difference is packaging format (Cut Tape versus Tape & Reel), which does not affect circuit performance or mechanical installation.

Q: What are the electrical differences between SR520 and SB5200?

A: SB5200 has a lower forward voltage of 900 mV at 5 A compared to SR520's 1.05 V. Both maintain 200 V reverse voltage, 5 A current rating, and 100 µA reverse leakage. The lower forward voltage reduces power dissipation. SB5200 operates from -50 to 150 °C versus SR520's -55 to 150 °C range.

Q: Is SR5200-TP suitable for high-reliability applications?

A: SR5200-TP meets the voltage and current requirements but has elevated reverse leakage current (500 µA versus 100 µA in SR520). This 5× increase in leakage current may impact standby power consumption and thermal performance in high-reliability designs. Evaluation against specific application leakage current limits is necessary.

Q: Are all substitute parts compatible with the DO-201AD package footprint?

A: SR520 A0G and SR5200-TP use DO-201AD packages and are directly compatible. SB5200 uses DO-201AA or DO-27 packages, which are mechanically compatible with DO-201AD in through-hole applications but may have minor dimensional variations. Verify PCB footprint specifications for SB5200 before substitution.

Q: What is the impact of forward voltage differences on circuit design?

A: Forward voltage differences directly affect power dissipation and voltage drop across the diode. SB5200 (900 mV) and SR5200-TP (950 mV) dissipate less power than SR520 (1.05 V) at 5 A. In rectifier circuits, lower forward voltage improves efficiency. In voltage-dependent applications, verify that the reduced voltage drop does not affect circuit operation.

Q: Do all substitute parts have the same RoHS compliance status?

A: No. SR520 and SR520 A0G are ROHS3 compliant. SR5200-TP is ROHS3 compliant. SB5200 has RoHS status listed as "Not applicable." Verify RoHS compliance requirements for your application before selecting SB5200.

Q: Can these parts be used interchangeably in existing designs?

A: SR520 and SR520 A0G are fully interchangeable. SB5200 and SR5200-TP require evaluation of forward voltage, reverse leakage current, and temperature range against design specifications. Mechanical compatibility with DO-201 package variants must be confirmed for PCB footprints designed specifically for DO-201AD.

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