SS215 Schottky Diode 150V 2A DO-214AA Equivalent & Substitute Parts

Part Overview

The SS215 is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 150V DC reverse voltage and 2A average rectified current in a surface mount DO-214AA (SMB) package. This component is designed for fast recovery applications with switching speeds ≤500ns and operates across a junction temperature range of -55°C to 150°C. The part is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1) and is suitable for general-purpose rectification and protection circuits requiring low forward voltage drop characteristics typical of Schottky technology.

Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific performance optimization while maintaining electrical and mechanical compatibility within the DO-214AA package form factor.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	150	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) Maximum @ If	950 mV @ 2 A	mV
Speed - Fast Recovery	≤500ns, >200mA (Io)	ns
Current - Reverse Leakage @ Vr	100	µA @ 150 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SS215 are grouped based on strict electrical and mechanical compatibility criteria. All substitute candidates share the following mandatory parameters:

Core Compatibility Parameters:

Voltage - DC Reverse (Vr) Maximum: 150V
Package / Case: DO-214AA, SMB (surface mount)
Technology: Schottky
Speed: Fast Recovery ≤500ns, >200mA (Io)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: MSL 1 (Unlimited)

Current Rating Grouping: Substitutes are organized by average rectified current (Io) capacity. The SS215 operates at 2A, allowing substitution with parts rated at 2A (direct equivalent) or higher current ratings (3A) where circuit design permits. Parts rated below 2A (1A) are listed for reference but represent downrating scenarios.

Forward Voltage Consideration: Forward voltage drop (Vf) varies across manufacturers and current ratings. Substitutes with lower Vf values (820mV vs. 950mV) offer improved efficiency characteristics, while higher Vf values require thermal and power dissipation verification in the application circuit.

Reverse Leakage Current: Reverse leakage (Ir) ranges from 100µA to 500µA across substitute options. Higher leakage values may impact circuit performance in sensitive applications requiring minimal standby current.

Parameter Comparison

Part Number	Manufacturer	Io (A)	Vr (V)	Vf (Max) @ If	Ir @ Vr	Tj (°C)	Package
SS215	Taiwan Semiconductor	2	150	950 mV @ 2 A	100 µA @ 150 V	-55 to 150	DO-214AA
CDBB1150-HF	Comchip Technology	1	150	870 mV @ 1 A	500 µA @ 150 V	-50 to 175	DO-214AA
CDBB2150-HF	Comchip Technology	2	150	875 mV @ 2 A	500 µA @ 150 V	-50 to 175	DO-214AA
CDBB3150-HF	Comchip Technology	3	150	870 mV @ 30 A	500 µA @ 150 V	-50 to 175	DO-214AA
SBR3150SB-13	Diodes Incorporated	3	150	820 mV @ 3 A	500 µA @ 150 V	—	DO-214AA
STPS3150U	STMicroelectronics	3	150	820 mV @ 3 A	2 µA @ 150 V	—	DO-214AA
STPS3150UY	STMicroelectronics	3	150	820 mV @ 3 A	2 µA @ 150 V	-40 to 175	DO-214AA

Engineering Selection Recommendations

Direct Equivalent (2A Rating): The CDBB2150-HF from Comchip Technology is the primary direct equivalent to the SS215. Both parts share identical 150V reverse voltage rating and 2A average rectified current specification. The CDBB2150-HF offers a lower forward voltage drop (875mV vs. 950mV at 2A), resulting in reduced power dissipation. Both parts are RoHS3 compliant with MSL 1 rating and active product status. The CDBB2150-HF supports an extended operating temperature range (-50°C to 175°C) compared to the SS215 (-55°C to 150°C), providing additional thermal margin in high-temperature applications.

Higher Current Rating Substitutes (3A Rating): The CDBB3150-HF, SBR3150SB-13, STPS3150U, and STPS3150UY are rated for 3A average rectified current, providing current headroom above the SS215 specification. These parts are suitable for applications where the 2A rating is marginal or where design evolution requires increased current capacity. All three-ampere options maintain the 150V reverse voltage rating and DO-214AA package compatibility. The STMicroelectronics STPS3150U and STPS3150UY variants offer significantly lower reverse leakage current (2µA vs. 100-500µA), beneficial for circuits requiring minimal standby current or operating in high-temperature environments. The STPS3150UY includes automotive-grade qualification and extended temperature range (-40°C to 175°C).

Lower Current Rating Reference (1A Rating): The CDBB1150-HF is rated for 1A average rectified current and represents a downrating scenario. This part is listed for reference only and is not recommended as a direct substitute for the SS215 in applications requiring the full 2A capacity. Use of the CDBB1150-HF is appropriate only when circuit design has been verified to operate safely at reduced current levels.

Compliance and Certification: All substitute parts listed maintain RoHS3 compliance, MSL 1 moisture sensitivity level, and active product status, ensuring regulatory alignment and supply chain availability. Selection among equivalent options should prioritize application-specific requirements for forward voltage drop, reverse leakage current, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the CDBB2150-HF directly replace the SS215 in existing designs?

A: Yes. The CDBB2150-HF is a direct electrical and mechanical equivalent, sharing identical 150V reverse voltage, 2A average rectified current rating, and DO-214AA package form factor. Both parts are Schottky technology with fast recovery characteristics and RoHS3 compliance. The CDBB2150-HF exhibits lower forward voltage drop (875mV vs. 950mV at 2A), which reduces power dissipation and may improve circuit efficiency. No design modifications are required for substitution.

Q: What is the advantage of using a 3A-rated diode instead of the 2A SS215?

A: Three-ampere rated substitutes (CDBB3150-HF, SBR3150SB-13, STPS3150U, STPS3150UY) provide current headroom above the design specification. This allows circuits to operate with reduced thermal stress on the diode, extending component life and improving reliability margins. Higher current ratings also accommodate future design revisions requiring increased current capacity without component replacement. The trade-off is typically increased package size or capacitance, though all listed 3A options maintain the DO-214AA package compatibility.

Q: How does reverse leakage current affect circuit performance?

A: Reverse leakage current (Ir) represents the small current flowing through the diode when reverse biased. The SS215 specifies 100µA at 150V, while most substitutes range from 100µA to 500µA. The STMicroelectronics STPS3150U and STPS3150UY offer significantly lower leakage at 2µA. Lower leakage current is beneficial in circuits with high input impedance, precision analog applications, or designs operating at elevated temperatures where leakage increases exponentially. For general-purpose rectification, leakage differences are typically negligible.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts listed are supplied in DO-214AA (SMB) surface mount package, ensuring mechanical and PCB layout compatibility with the SS215. Packaging options vary by supplier: Taiwan Semiconductor and Comchip Technology supply in Tape & Reel (TR) format, while STMicroelectronics offers Cut Tape (CT) and Digi-Reel® options. Verify packaging format availability with your component supplier to ensure compatibility with assembly equipment and procurement workflows.

Q: What is the difference between the STPS3150U and STPS3150UY?

A: Both parts are STMicroelectronics 150V, 3A Schottky diodes with identical electrical specifications (820mV forward voltage, 2µA reverse leakage). The primary difference is that STPS3150UY carries automotive-grade qualification (Grade Q) and specifies an extended operating temperature range (-40°C to 175°C) compared to STPS3150U, which does not specify a minimum junction temperature. The STPS3150UY is suitable for automotive and industrial applications requiring temperature-rated components, while STPS3150U is appropriate for general commercial applications.

Q: Can the 1A-rated CDBB1150-HF be used in place of the SS215?

A: The CDBB1150-HF is not recommended as a substitute for the SS215 in applications requiring the full 2A capacity. The 1A rating represents a 50% reduction in current-carrying capability, which would cause excessive thermal stress and potential component failure if the circuit draws 2A. The CDBB1150-HF is suitable only for applications where circuit design has been verified to operate safely at 1A or below. Use of undersized components violates design safety margins and is not an acceptable substitution practice.

Q: How do forward voltage differences impact power dissipation?

A: Forward voltage drop (Vf) directly affects power dissipation according to P = Vf × I. The SS215 specifies 950mV at 2A, while most substitutes range from 820mV to 875mV at equivalent current. At 2A, the difference between 950mV and 875mV represents approximately 150mW reduction in power dissipation per diode. In high-current or multi-diode applications, lower forward voltage translates to reduced thermal load, lower heatsinking requirements, and improved overall circuit efficiency. Selection should balance forward voltage performance against other parameters such as reverse leakage and temperature rating.

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