STPS50U100CT Equivalent & Substitute Parts

Part Overview

The STPS50U100CT is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with 100 V reverse voltage rating and 25 A average rectified current per diode. The device is packaged in TO-220-3 through-hole format and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with the electrical specifications and mechanical form factor while sourcing from manufacturers with active product lines.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io) (per Diode)	25	A
Voltage - Forward (Vf) (Max) @ If	730 mV @ 25 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	200	µA @ 100 V
Operating Temperature - Junction (Max)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the STPS50U100CT is determined by the following critical parameters:

Mandatory Matching Criteria:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 100 V
Mounting Type: Through Hole
Package / Case: TO-220-3

Current Rating Consideration: The STPS50U100CT is rated for 25 A average rectified current per diode. Substitute parts are grouped into three categories based on current capacity:

Full Capacity Substitutes (20 A and above): Parts rated for 20 A or higher current capacity provide direct functional equivalence with no derating required.
Reduced Capacity Substitutes (10 A to 19 A): Parts rated between 10 A and 19 A can serve as substitutes in applications where the circuit design permits operation at lower current levels or where thermal management allows for reduced current density.
Lower Capacity Substitutes (5 A to 9 A): Parts rated below 10 A are suitable only for applications with significantly reduced current requirements and are not recommended as primary substitutes for the full 25 A rating.

Secondary Electrical Parameters: Forward voltage (Vf), reverse leakage current, and operating temperature range vary among substitute parts but do not disqualify substitution when the primary criteria are met. These parameters must be evaluated within the specific application circuit design.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Max)	Package	Product Status
STPS50U100CT	STMicroelectronics	100 V	25 A	730 mV @ 25 A	200 µA @ 100 V	150°C	TO-220-3	Obsolete
DST40100C	Littelfuse Inc.	100 V	20 A	750 mV @ 20 A	1 mA @ 100 V	150°C	TO-220-3	Active
MBR16100CT-BP	Micro Commercial Co	100 V	16 A	850 mV @ 8 A	100 µA @ 100 V	150°C	TO-220-3	Active
DST20100C	Littelfuse Inc.	100 V	10 A	550 mV @ 10 A	300 µA @ 100 V	150°C	TO-220-3	Active
DST30100C	Littelfuse Inc.	100 V	10 A	750 mV @ 15 A	500 µA @ 100 V	150°C	TO-220-3	Active
FYP1010DNTU	onsemi	100 V	10 A	950 mV @ 10 A	1 mA @ 100 V	150°C	TO-220-3	Obsolete
MBR10100CT	Taiwan Semiconductor Corporation	100 V	10 A	950 mV @ 10 A	100 µA @ 100 V	150°C	TO-220-3	Discontinued at DiGi Electronics
MBR10100CT-BP	Micro Commercial Co	100 V	10 A	850 mV @ 5 A	200 µA @ 100 V	150°C	TO-220-3	Active
MBR10100CT-G1	Diodes Incorporated	100 V	5 A	840 mV @ 5 A	50 µA @ 100 V	150°C	TO-220-3	Active
MBR16100CTG	onsemi	100 V	8 A	740 mV @ 8 A	100 µA @ 100 V	175°C	TO-220-3	Obsolete
MBR20100CT-BP	Micro Commercial Co	100 V	10 A	950 mV @ 20 A	150 µA @ 100 V	150°C	TO-220-3	Active

Engineering Selection Recommendations

Primary Substitute (Full Capacity): The DST40100C from Littelfuse Inc. is the recommended primary substitute for the STPS50U100CT. This part maintains 100 V reverse voltage rating, provides 20 A average rectified current capacity, operates at 150°C maximum junction temperature, and is packaged in TO-220-3 through-hole format. The DST40100C is classified as active product status with ROHS3 compliance and unlimited moisture sensitivity level. Current inventory of 707 pieces supports production requirements.

Secondary Substitutes (Reduced Capacity): For applications where circuit design permits operation at reduced current levels, the following active parts are suitable:

MBR16100CT-BP (Micro Commercial Co): 16 A capacity, active status, 982 pieces in stock
MBR10100CT-BP (Micro Commercial Co): 10 A capacity, active status, 5852 pieces in stock
DST20100C (Littelfuse Inc.): 10 A capacity, active status, 902 pieces in stock
DST30100C (Littelfuse Inc.): 10 A capacity, active status, 715 pieces in stock
MBR20100CT-BP (Micro Commercial Co): 10 A capacity, active status, 5013 pieces in stock

Compliance Verification: All recommended substitutes maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification consistent with the original STPS50U100CT. Moisture sensitivity level 1 (unlimited) is maintained across all active substitute options, ensuring compatibility with standard handling and storage procedures.

Obsolete Parts to Avoid: FYP1010DNTU (onsemi) and MBR16100CTG (onsemi) are classified as obsolete and should not be selected for new designs despite technical compatibility. MBR10100CT (Taiwan Semiconductor Corporation) is discontinued at DiGi Electronics and presents supply chain risk.

Frequently Asked Questions (FAQ)

Q: Can the DST40100C directly replace the STPS50U100CT in all applications?

A: The DST40100C meets all mandatory electrical and mechanical criteria for substitution: 100 V reverse voltage, 1 pair common cathode configuration, Schottky technology, TO-220-3 package, and through-hole mounting. However, the DST40100C is rated for 20 A average rectified current compared to the STPS50U100CT's 25 A rating. Applications operating at or near 25 A require thermal analysis to confirm acceptable operation at the reduced current capacity. Applications operating below 20 A require no derating.

Q: What is the difference between the various 10 A rated substitutes?

A: Multiple manufacturers offer 10 A rated Schottky diode arrays in TO-220-3 configuration at 100 V: DST20100C, DST30100C, MBR10100CT-BP, MBR10100CT, MBR20100CT-BP, and FYP1010DNTU. These parts differ in forward voltage characteristics, reverse leakage current, and product status. DST20100C exhibits the lowest forward voltage (550 mV @ 10 A), while FYP1010DNTU and MBR10100CT exhibit higher forward voltage (950 mV @ 10 A). For new designs, select from active status parts: DST20100C, DST30100C, MBR10100CT-BP, or MBR20100CT-BP.

Q: Is the MBR10100CT-G1 suitable as a substitute?

A: The MBR10100CT-G1 is classified as active product status and meets the mandatory substitution criteria. However, this part is rated for only 5 A average rectified current, which represents a 80% reduction from the STPS50U100CT's 25 A rating. The MBR10100CT-G1 is suitable only for applications with significantly reduced current requirements and is not recommended as a general substitute for the full 25 A rating. This part includes AEC-Q101 automotive qualification, which may be beneficial for automotive applications operating at reduced current levels.

Q: Why are some substitute parts listed as obsolete?

A: FYP1010DNTU and MBR16100CTG are classified as obsolete by their respective manufacturers. While these parts may still be available in inventory, they do not represent sustainable long-term supply sources. New designs should utilize active status parts to ensure continued availability and manufacturer support. Existing designs currently using obsolete parts should transition to active alternatives during the next design revision cycle.

Q: What is the significance of the TO-220-3 package designation?

A: The TO-220-3 package is a three-lead through-hole package with standardized pin spacing and mounting hole configuration. All substitute parts listed maintain this package designation, ensuring mechanical compatibility with existing printed circuit board layouts and thermal management hardware. The TO-220-3 package supports direct pin-for-pin replacement without PCB redesign.

Q: How do forward voltage differences affect circuit performance?

A: Forward voltage (Vf) varies among substitute parts from 550 mV to 950 mV depending on manufacturer and test conditions. In rectifier applications, higher forward voltage results in greater voltage drop across the diode and increased power dissipation. Circuit designs must account for the specific Vf of the selected substitute part. The DST40100C (750 mV @ 20 A) and DST20100C (550 mV @ 10 A) represent moderate forward voltage options suitable for most applications.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed in this reference maintain ROHS3 compliance and REACH unaffected status, consistent with the original STPS50U100CT. This compliance status is maintained across all active and obsolete substitute options, ensuring environmental and regulatory compatibility.

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