DSSK20-0045AM Equivalent & Substitute Parts

Part Overview

The DSSK20-0045AM is an active Schottky diode array manufactured by IXYS, configured as a 1 Pair Common Cathode arrangement in a TO-220-3 Full Pack with isolated tab. This component is designed for applications requiring fast recovery rectification at 45 V reverse voltage with 10 A average rectified current per diode. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances of the application circuit, maintaining compatibility with the through-hole TO-220 mounting footprint and common cathode configuration.

Substiute Parts

DSSK20-0045AM

IXYSIn Stock: 1939DSSK20-0045AM Datasheet

Current PartRFQ

STPS10L40CT

STMicroelectronicsIn Stock: 3632STPS10L40CT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DSSK20-0045AM is determined by the following critical parameters:

Configuration Match: The substitute part must maintain a 1 Pair Common Cathode diode array configuration to ensure pin-compatible operation within the circuit.

Technology Match: Schottky technology is required to preserve the fast recovery characteristics and forward voltage performance of the original design.

Voltage Rating: The substitute part must support the maximum reverse voltage (Vr) required by the application. A lower voltage rating indicates reduced voltage margin and potential circuit failure under transient conditions.

Current Rating: The substitute part must support the average rectified current (Io) per diode required by the application. A lower current rating indicates thermal stress and potential component failure.

Mounting Compatibility: Through-hole TO-220 package compatibility ensures mechanical fit and thermal interface consistency with the PCB design.

Regulatory Compliance: ROHS3 compliance and unlimited MSL rating ensure material composition and moisture handling consistency with the original part.

The STPS10L40CT from STMicroelectronics is identified as a substitute based on matching configuration, technology, and mounting type. However, this substitute operates at reduced voltage (40 V vs. 45 V) and reduced current (5 A vs. 10 A) ratings.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (DSSK20-0045AM): This part is active and ROHS3 compliant with unlimited moisture sensitivity rating. It is the specified component for applications requiring 45 V reverse voltage and 10 A average rectified current per diode with operating junction temperature to 175°C.

Substitute Part (STPS10L40CT): This part is active and ROHS3 compliant with unlimited moisture sensitivity rating. It is suitable for applications where the circuit voltage and current requirements do not exceed 40 V and 5 A per diode, respectively, and where maximum junction temperature does not exceed 150°C. The substitute part maintains pin compatibility and fast recovery characteristics but operates at reduced electrical ratings.

Selection between these parts is determined by the specific voltage, current, and temperature requirements of the target application circuit. Both parts carry equivalent regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can the STPS10L40CT replace the DSSK20-0045AM in all applications?

A: No. The STPS10L40CT is rated for 40 V maximum reverse voltage and 5 A average rectified current per diode, compared to 45 V and 10 A for the DSSK20-0045AM. Substitution is valid only when the application circuit operates within the lower electrical ratings of the STPS10L40CT.

Q: Are the TO-220-3 packages mechanically compatible?

A: Yes. Both parts use through-hole TO-220-3 packages with compatible PCB footprints. The DSSK20-0045AM features an isolated tab variant, while the STPS10L40CT uses standard TO-220 packaging. Both mount to the same footprint.

Q: What is the significance of the "1 Pair Common Cathode" configuration?

A: This configuration indicates two diodes sharing a common cathode terminal. Pin compatibility requires that any substitute part maintain this exact configuration to ensure correct circuit operation without PCB redesign.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the DSSK20-0045AM and STPS10L40CT are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating. They carry equivalent regulatory status for material composition and handling.

Q: What is the impact of the lower maximum junction temperature of the STPS10L40CT?

A: The STPS10L40CT is rated to 150°C maximum junction temperature, compared to 175°C for the DSSK20-0045AM. Applications requiring sustained operation above 150°C junction temperature require the primary part.

Q: How do the forward voltage characteristics compare?

A: The DSSK20-0045AM specifies 690 mV forward voltage at 10 A, while the STPS10L40CT specifies 530 mV at 5 A. These measurements are taken at different current levels and cannot be directly compared. Forward voltage performance depends on the actual operating current of the application.

Q: Are both parts available in the same packaging format?

A: Both parts use TO-220-3 through-hole packages. The DSSK20-0045AM is supplied in full pack with isolated tab, while the STPS10L40CT uses standard TO-220 packaging. Both are compatible with standard TO-220-3 PCB footprints.