SR815 Schottky Diode 150V 8A Equivalent & Substitute Parts

Part Overview

The SR815 is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 150V DC reverse voltage and 8A average rectified current in a DO-201AD axial through-hole package. This component is designed for fast recovery applications requiring switching speeds of 500ns or less at currents exceeding 200mA. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits current rating adjustments within application parameters.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	1.02 V @ 8 A	V
Speed - Fast Recovery	≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	100	µA @ 150 V
Mounting Type	Through Hole	-
Package / Case	DO-201AD, Axial	-
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the SR815 is determined by the following critical parameters:

Voltage Rating Compatibility: The substitute part must maintain the same maximum DC reverse voltage rating of 150V to ensure equivalent reverse bias protection and breakdown characteristics.

Package Compatibility: The substitute part must use the DO-201AD axial through-hole package to ensure mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Technology Class: The substitute part must employ Schottky diode technology to maintain fast recovery switching characteristics and forward voltage drop performance.

Speed Classification: The substitute part must meet or exceed the fast recovery specification of 500ns or less at currents exceeding 200mA.

Regulatory Compliance: The substitute part must maintain ROHS3 compliance and REACH unaffected status to satisfy environmental and regulatory requirements.

The STPS3150RL from STMicroelectronics meets all voltage, package, technology, speed, and compliance criteria. However, the current rating differs at 3A versus the SR815's 8A specification. This substitute is applicable only in applications where the maximum required current does not exceed 3A.

Parameter Comparison

Parameter	SR815 (Taiwan Semiconductor)	STPS3150RL (STMicroelectronics)
Voltage - DC Reverse (Vr) (Max)	150 V	150 V
Current - Average Rectified (Io)	8 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.02 V @ 8 A	820 mV @ 3 A
Speed - Fast Recovery	≤ 500ns, > 200mA (Io)	≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 150 V	2 µA @ 150 V
Mounting Type	Through Hole	Through Hole
Package / Case	DO-201AD, Axial	DO-201AD, Axial
Operating Temperature - Junction (Max)	150°C	175°C
Technology	Schottky	Schottky
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)	Cut Tape (CT)

Engineering Selection Recommendations

SR815 Selection: The SR815 is the primary component choice for applications requiring 8A average rectified current at 150V reverse voltage. This part maintains active product status with 935 units in stock and full ROHS3 compliance.

STPS3150RL Selection: The STPS3150RL is a valid substitute only when application current requirements do not exceed 3A. This part offers superior reverse leakage characteristics (2 µA versus 100 µA) and higher maximum junction temperature (175°C versus 150°C). The STPS3150RL maintains active product status with 25,400 units in stock and full ROHS3 compliance. Both parts satisfy REACH unaffected and EAR99 ECCN classifications.

Packaging Consideration: The SR815 is supplied in Tape & Reel format, while the STPS3150RL is supplied in Cut Tape format. This difference affects procurement and assembly processes but does not impact electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the STPS3150RL replace the SR815 in all applications?

A: No. The STPS3150RL is rated for 3A average rectified current, while the SR815 is rated for 8A. The STPS3150RL is a valid substitute only in applications where the maximum required current does not exceed 3A. Exceeding the 3A rating of the STPS3150RL will result in component failure.

Q: Are the voltage ratings identical between SR815 and STPS3150RL?

A: Yes. Both parts are rated for 150V maximum DC reverse voltage and employ identical Schottky technology. Reverse voltage compatibility is confirmed.

Q: Do both parts use the same package?

A: Yes. Both the SR815 and STPS3150RL use the DO-201AD axial through-hole package. Physical dimensions and PCB mounting compatibility are identical.

Q: What is the difference in forward voltage drop between these parts?

A: The SR815 exhibits 1.02V forward voltage drop at 8A, while the STPS3150RL exhibits 820mV forward voltage drop at 3A. Forward voltage characteristics are measured at their respective rated currents and are not directly comparable across different current levels.

Q: Are both parts RoHS compliant?

A: Yes. Both the SR815 and STPS3150RL are ROHS3 compliant and REACH unaffected, satisfying environmental and regulatory requirements.

Q: What is the difference in reverse leakage current?

A: The SR815 exhibits 100µA reverse leakage at 150V, while the STPS3150RL exhibits 2µA reverse leakage at 150V. The STPS3150RL demonstrates significantly lower reverse leakage characteristics.

Q: Can I use the SR815 in place of the STPS3150RL?

A: Yes. The SR815 can be used in any application designed for the STPS3150RL, as the SR815 provides higher current capacity (8A versus 3A) and maintains all other electrical and mechanical compatibility parameters.

Q: What is the difference in operating temperature range?

A: The SR815 operates from -55°C to 150°C junction temperature, while the STPS3150RL operates to a maximum of 175°C. The STPS3150RL provides 25°C additional high-temperature margin.

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