SS22 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS22 is an active Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 20 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This component is designed for fast recovery applications with switching speeds ≤ 500 ns and forward voltage of 500 mV at 2 A. The SS22 is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1) and remains in active production status with substantial inventory availability.

Equivalent and substitute parts are identified when alternative Schottky diodes meet or exceed the electrical performance requirements of the SS22 while maintaining compatible mechanical packaging and thermal operating ranges. Substitution analysis ensures functional interchangeability for circuit design flexibility and supply chain continuity.

Substiute Parts

SS22

Taiwan Semiconductor CorporationIn Stock: 15295SS22 Datasheet

Current PartRFQ

STPS340U

STMicroelectronicsIn Stock: 445402STPS340U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Schottky diode substitution is determined by the following electrical and mechanical criteria:

Mandatory Compatibility Requirements:

• Package / Case: DO-214AA (SMB) surface mount form factor
• Technology: Schottky rectifier diode
• Voltage - DC Reverse (Vr): Must equal or exceed 20 V
• Current - Average Rectified (Io): Must equal or exceed 2 A
• Speed: Fast recovery characteristic ≤ 500 ns, > 200 mA (Io)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: MSL 1 (Unlimited)

Substitution Logic: A part qualifies as an equivalent or substitute when it meets or exceeds all mandatory electrical ratings while maintaining identical or superior thermal and mechanical specifications. Higher voltage and current ratings do not preclude substitution; however, forward voltage characteristics and reverse leakage must remain within acceptable circuit operating parameters. The STPS340U meets all substitution criteria with enhanced voltage (40 V) and current (3 A) ratings while maintaining compatible packaging and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

SS22 Selection Criteria: The SS22 is appropriate for applications requiring a 20 V, 2 A Schottky rectifier with standard forward voltage characteristics and operating temperature range of -55°C to 125°C. This part maintains active production status with high inventory availability (15,265 pcs) and full ROHS3 compliance with unlimited moisture sensitivity rating.

STPS340U Selection Criteria: The STPS340U is suitable as a substitute when circuit design permits higher voltage (40 V) and current (3 A) ratings. This part provides enhanced performance margins with significantly lower reverse leakage current (20 µA @ 40 V versus 400 µA @ 20 V) and extended maximum junction temperature rating (150°C). The STPS340U maintains identical packaging (DO-214AA, SMB), fast recovery speed characteristics, ROHS3 compliance, and unlimited moisture sensitivity rating. Extensive inventory availability (445,300 pcs) supports supply chain continuity.

Compliance Basis: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS code 8541.10.0080. Selection between these parts is based on circuit voltage and current requirements, thermal operating environment, and reverse leakage specifications rather than regulatory or compliance constraints.

Frequently Asked Questions (FAQ)

Q: Can the STPS340U replace the SS22 in all applications?

A: The STPS340U is electrically compatible with SS22 circuits when the application voltage does not exceed 40 V and current does not exceed 3 A. The higher voltage and current ratings of the STPS340U do not create incompatibility in lower-voltage circuits. However, forward voltage characteristics differ (630 mV @ 3 A for STPS340U versus 500 mV @ 2 A for SS22), which may affect circuit performance in precision applications. Reverse leakage current is significantly lower in the STPS340U, which may improve circuit performance in high-impedance applications.

Q: Are the packages identical between SS22 and STPS340U?

A: Both parts use the DO-214AA (SMB) surface mount package. The SS22 is supplied in Tape & Reel (TR) packaging, while the STPS340U is supplied in Cut Tape (CT) and Digi-Reel® packaging. The component footprint and land pattern are identical, enabling direct PCB substitution without layout modifications.

Q: What is the temperature operating range difference?

A: The SS22 operates from -55°C to 125°C junction temperature. The STPS340U specifies a maximum junction temperature of 150°C, providing a 25°C higher thermal ceiling. This extended range may be beneficial in high-temperature environments but does not affect substitution in standard operating conditions.

Q: How do reverse leakage currents compare?

A: The SS22 exhibits 400 µA reverse leakage at 20 V, while the STPS340U exhibits 20 µA reverse leakage at 40 V. The STPS340U demonstrates substantially lower leakage current, which is advantageous in applications sensitive to standby current or requiring minimal reverse current flow.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the SS22 and STPS340U are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1) and REACH unaffected status. Both parts carry identical ECCN EAR99 classification and HTSUS code 8541.10.0080.

Q: What is the primary electrical difference between these parts?

A: The STPS340U provides higher voltage (40 V versus 20 V) and current (3 A versus 2 A) ratings with lower reverse leakage current. Forward voltage is higher in the STPS340U (630 mV @ 3 A) compared to the SS22 (500 mV @ 2 A). Both parts maintain identical fast recovery speed characteristics (≤ 500 ns, > 200 mA).