STPS40170CW Equivalent & Substitute Parts

Part Overview

The STPS40170CW is a Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode arrangement with a maximum reverse voltage rating of 170 V and average rectified current of 20 A per diode. The device is packaged in a TO-247-3 through-hole format and is classified as Active product status with full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining identical mechanical packaging and thermal characteristics.

Substiute Parts

STPS40170CW

STMicroelectronicsIn Stock: 3871STPS40170CW Datasheet

Current PartRFQ

STPS40150CW

STMicroelectronicsIn Stock: 2732STPS40150CW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS40170CW is permissible when the alternative part maintains the following critical parameters:

1. Diode Configuration: Must be 1 Pair Common Cathode
2. Technology: Must be Schottky
3. Current Rating: Must support 20 A average rectified current per diode
4. Forward Voltage: Must not exceed 920 mV @ 20 A
5. Speed Characteristic: Must be Fast Recovery ≤ 500ns, > 200mA (Io)
6. Operating Temperature: Must support 175°C maximum junction temperature
7. Mounting Type: Must be Through Hole
8. Package: Must be TO-247-3
9. Compliance: Must maintain RoHS3 compliance and MSL 1 rating

The STPS40150CW qualifies as a substitute part because it satisfies all mandatory parameters listed above. The reverse voltage rating of 150 V on the STPS40150CW is lower than the 170 V specification of the main part; however, this represents a downgrade in voltage capability and is suitable only for applications where the circuit design operates at or below 150 V maximum reverse bias conditions.

Parameter Comparison

Engineering Selection Recommendations

STPS40170CW (Primary Selection)

Use the STPS40170CW when the circuit design requires a maximum reverse voltage rating of 170 V. This part is the specified component and provides the full voltage margin for applications operating at or near 170 V reverse bias conditions. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

STPS40150CW (Substitute Selection)

The STPS40150CW is a valid substitute only when the application circuit operates at a maximum reverse voltage of 150 V or lower. This part is also Active product status with identical RoHS3 compliance and MSL 1 rating. The substitute part is electrically and mechanically compatible with the main part in all other parameters. Selection of the STPS40150CW in applications exceeding 150 V reverse bias will result in device overstress and potential failure.

Both parts are manufactured by STMicroelectronics and carry identical compliance certifications (RoHS3, ECCN EAR99, HTSUS 8541.10.0080).

Frequently Asked Questions (FAQ)

Q: Can the STPS40150CW be used as a direct replacement for the STPS40170CW in all applications?

A: No. The STPS40150CW has a maximum reverse voltage rating of 150 V compared to 170 V for the STPS40170CW. The substitute part is suitable only for applications where the circuit design operates at or below 150 V maximum reverse bias. Applications requiring 170 V reverse voltage capability must use the STPS40170CW.

Q: Are the STPS40170CW and STPS40150CW pin-compatible?

A: Yes. Both parts use the TO-247-3 package with identical pin configuration and mechanical dimensions. They are directly pin-compatible for PCB mounting and do not require layout modifications.

Q: Do both parts have the same forward voltage drop?

A: Yes. Both the STPS40170CW and STPS40150CW have a maximum forward voltage of 920 mV @ 20 A. Forward voltage performance is identical between the two parts.

Q: What is the difference in reverse leakage current between these parts?

A: The STPS40170CW exhibits 30 µA reverse leakage @ 170 V, while the STPS40150CW exhibits 8 µA reverse leakage @ 150 V. These measurements are taken at each part's respective maximum reverse voltage rating and are not directly comparable due to the different voltage conditions.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the STPS40170CW and STPS40150CW are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the current rating for each diode in the array?

A: Both parts are rated for 20 A average rectified current per diode. The diode array contains one pair of diodes in a common cathode configuration.

Q: Can the STPS40170CW be used in place of the STPS40150CW?

A: Yes. The STPS40170CW can be used as a substitute for the STPS40150CW in any application. The higher voltage rating of the STPS40170CW provides additional reverse voltage margin and is fully compatible with circuits designed for the STPS40150CW.