Equivalent & Substitute Parts for 10CTQ150 Schottky Diode Array

Part Overview

The 10CTQ150 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode arrangement rated for 150 V DC reverse voltage and 5 A average rectified current per diode. The device is packaged in TO-220-3 through-hole configuration and features fast recovery characteristics with a maximum forward voltage of 930 mV at 5 A.

The 10CTQ150 is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. Active alternatives with identical or enhanced electrical specifications are available from multiple manufacturers, providing design flexibility while maintaining functional compatibility.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	150	V
Current - Average Rectified (Io) (per Diode)	5	A
Voltage - Forward (Vf) (Max) @ If	930 mV @ 5 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	50	µA @ 150 V
Operating Temperature - Junction	-55 to 175	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the 10CTQ150 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Diode Configuration: 1 Pair Common Cathode (mandatory match)
Technology: Schottky (mandatory match)
Voltage - DC Reverse (Vr) (Max): 150 V (minimum requirement)
Mounting Type: Through Hole (mandatory match)
Package / Case: TO-220-3 (mandatory match)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (mandatory match)

Allowable Parameter Variations:

Current - Average Rectified (Io): Equal to or greater than 5 A per diode
Voltage - Forward (Vf) (Max) @ If: Within acceptable operating range
Current - Reverse Leakage @ Vr: Equal to or less than specified maximum
Operating Temperature - Junction: Equal to or greater than specified range

Substitute parts are grouped into two categories:

Category 1 - Direct Parametric Equivalents (5 A Rating): Parts with identical current rating (5 A per diode) and matching electrical characteristics. These provide direct replacement capability with no circuit redesign required.

Category 2 - Upgraded Parametric Equivalents (10 A Rating): Parts with enhanced current rating (10 A per diode) while maintaining all other critical parameters. These provide superior performance headroom and are suitable for applications where the original 5 A specification is not a limiting constraint.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Io (per Diode)	Vf (Max) @ If	Vr (Max)	Reverse Leakage @ Vr	Tj (Operating Range)	Product Status	RoHS Status
10CTQ150	Vishay General Semiconductor	5 A	930 mV @ 5 A	150 V	50 µA @ 150 V	-55 to 175°C	Obsolete	Non-compliant
STPS10150CT	STMicroelectronics	5 A	920 mV @ 5 A	150 V	2 µA @ 150 V	—55 to 175°C	Active	ROHS3 Compliant
10CTQ150	SMC Diode Solutions	5 A	930 mV @ 5 A	150 V	50 µA @ 150 V	-55 to 175°C	Active	ROHS3 Compliant
DSSK20-015A	IXYS	10 A	790 mV @ 10 A	150 V	500 µA @ 150 V	-55 to 175°C	Active	ROHS3 Compliant
STPS20150CT	STMicroelectronics	10 A	920 mV @ 10 A	150 V	5 µA @ 150 V	—55 to 175°C	Active	ROHS3 Compliant
MBR10150CT	Taiwan Semiconductor Corporation	10 A	980 mV @ 10 A	150 V	100 µA @ 150 V	-55 to 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (5 A Current Rating):

The STPS10150CT manufactured by STMicroelectronics is the preferred direct replacement for the obsolete 10CTQ150. This part maintains identical electrical specifications with 5 A per diode current rating and 150 V reverse voltage rating. The STPS10150CT offers superior reverse leakage characteristics (2 µA versus 50 µA) and holds active product status with ROHS3 compliance. The device is available in production quantities and packaged in TO-220-3 configuration.

The 10CTQ150 from SMC Diode Solutions provides parametric equivalence with identical electrical characteristics to the original Vishay part. This option is suitable where exact parameter matching is required. The SMC variant is active and ROHS3 compliant.

For Upgraded Performance (10 A Current Rating):

The STPS20150CT manufactured by STMicroelectronics provides enhanced current capacity at 10 A per diode while maintaining the 150 V reverse voltage specification. This part is recommended for applications where increased current headroom is beneficial. The STPS20150CT demonstrates superior reverse leakage performance (5 µA) and maintains full ROHS3 compliance with extensive inventory availability.

The DSSK20-015A from IXYS offers 10 A per diode capacity with lower forward voltage characteristics (790 mV @ 10 A). This part is suitable for applications prioritizing reduced power dissipation. ROHS3 compliance is confirmed.

The MBR10150CT from Taiwan Semiconductor Corporation provides 10 A per diode capacity with active product status and ROHS3 compliance. Operating temperature range extends to -55°C minimum with 150°C maximum junction temperature.

Compliance Considerations:

All recommended substitute parts hold active product status and ROHS3 compliance, eliminating obsolescence risk and meeting environmental regulatory requirements. The original 10CTQ150 from Vishay is RoHS non-compliant and obsolete, making transition to compliant alternatives necessary for new designs and long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the STPS10150CT directly replace the 10CTQ150 without circuit modification?

A: Yes. The STPS10150CT maintains identical electrical specifications including 5 A per diode current rating, 150 V reverse voltage, and fast recovery characteristics. Both devices are packaged in TO-220-3 through-hole configuration with matching pin assignments for 1 Pair Common Cathode diode arrays. No circuit redesign is required.

Q: What is the advantage of using a 10 A rated part instead of the original 5 A specification?

A: Parts rated for 10 A per diode provide increased current capacity and thermal margin within the same TO-220-3 package. This allows operation at higher current levels or reduced junction temperature at the original 5 A specification, extending device lifetime and improving reliability. Selection depends on application current requirements and thermal management capabilities.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All recommended substitute parts are packaged in TO-220-3 through-hole configuration with identical mechanical dimensions and pin assignments. Physical board layout compatibility is maintained across all alternatives.

Q: What is the difference between the SMC 10CTQ150 and the Vishay 10CTQ150?

A: Both parts share identical part numbers and electrical specifications. The SMC variant is manufactured by SMC Diode Solutions and holds active product status with ROHS3 compliance, whereas the Vishay original is obsolete and RoHS non-compliant. The SMC version is recommended for new procurement.

Q: How do reverse leakage characteristics differ among substitute options?

A: Reverse leakage varies significantly across alternatives. The STPS10150CT exhibits the lowest leakage at 2 µA @ 150 V, followed by STPS20150CT at 5 µA. The original 10CTQ150 and SMC equivalent specify 50 µA, while the DSSK20-015A and MBR10150CT specify 500 µA and 100 µA respectively. Lower leakage reduces standby power consumption and is beneficial in battery-powered or low-power applications.

Q: Is the MBR10150CT suitable for applications requiring the full -55°C to 175°C temperature range?

A: The MBR10150CT specifies a maximum junction temperature of 150°C, which is 25°C lower than the original 10CTQ150 specification of 175°C. For applications requiring operation at junction temperatures between 150°C and 175°C, the STPS10150CT, STPS20150CT, or SMC 10CTQ150 are required.

Q: What forward voltage differences should be considered when selecting between alternatives?

A: Forward voltage specifications range from 790 mV to 980 mV depending on the part and current rating. At 5 A operation, the STPS10150CT specifies 920 mV compared to the original 930 mV, representing negligible difference. At 10 A operation, the DSSK20-015A specifies 790 mV, providing lower power dissipation compared to the STPS20150CT at 920 mV or MBR10150CT at 980 mV. Selection should account for total circuit power budget and thermal management requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts hold ROHS3 compliance status. The original Vishay 10CTQ150 is RoHS non-compliant, making transition to compliant alternatives necessary for applications subject to environmental regulations or customer requirements.

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