Equivalent & Substitute Parts for 30CTQ060

Part Overview

The 30CTQ060 is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 60 V DC reverse voltage and 15 A average rectified current per diode. Manufactured by Vishay General Semiconductor - Diodes Division, this component is packaged in TO-220-3 through-hole format and features fast recovery characteristics suitable for high-frequency rectification applications.

The 30CTQ060 is classified as obsolete. Locating active production alternatives is necessary to ensure supply chain continuity and access to components with current manufacturing support and compliance certifications.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	60	V
Current - Average Rectified (Io) (per Diode)	15	A
Voltage - Forward (Vf) (Max) @ If	620 mV @ 15 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	800 µA @ 60 V	—
Operating Temperature - Junction	−55°C to 150°C	—
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the 30CTQ060 is determined by the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 60 V minimum
Current - Average Rectified (Io) (per Diode): 15 A minimum
Mounting Type: Through Hole
Package / Case: TO-220-3 or compatible through-hole package

Allowable Variation Parameters:

Voltage - Forward (Vf): Substitute parts may have different forward voltage characteristics within the same voltage and current class
Current - Reverse Leakage: Substitute parts may have lower leakage current values
Operating Temperature - Junction: Substitute parts may have higher maximum junction temperature ratings
Product Status: Active production parts are preferred over obsolete parts

Substitute parts are grouped into two categories:

Category 1: Direct Functional Equivalents (Same Package, Same Ratings) Parts that maintain identical voltage, current, and package specifications with active product status.

Category 2: Parametric Equivalents (Same Electrical Ratings, Different Package) Parts that maintain identical voltage and current ratings but use alternative through-hole packages such as TO-247-3.

Category 3: Reduced Current Alternatives (Lower Current Rating) Parts that maintain 60 V voltage rating but with reduced current capacity, suitable for applications with lower current requirements.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io (per Diode)	Vf (Max) @ If	Package	Product Status	RoHS Status
30CTQ060	Vishay General Semiconductor	60 V	15 A	620 mV @ 15 A	TO-220-3	Obsolete	Non-compliant
STPS20L60CT	STMicroelectronics	60 V	10 A	600 mV @ 10 A	TO-220-3	Active	ROHS3 Compliant
STPS3060CW	STMicroelectronics	60 V	15 A	850 mV @ 15 A	TO-247-3	Active	ROHS3 Compliant
STPS30H60CT	STMicroelectronics	60 V	15 A	660 mV @ 15 A	TO-220-3	Active	ROHS3 Compliant
STPS30L45CT	STMicroelectronics	45 V	15 A	550 mV @ 15 A	TO-220-3	Active	ROHS3 Compliant
STPS30L60CT	STMicroelectronics	60 V	15 A	600 mV @ 15 A	TO-220-3	Active	ROHS3 Compliant
STPS41L60CT	STMicroelectronics	60 V	20 A	600 mV @ 20 A	TO-220-3	Active	ROHS3 Compliant
30CTQ060 (SMC)	SMC Diode Solutions	60 V	15 A	620 mV @ 15 A	TO-220-3	Active	ROHS3 Compliant
MBR30L60CTG	onsemi	60 V	15 A	620 mV @ 15 A	TO-220-3	Obsolete	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: STPS30L60CT (STMicroelectronics)

The STPS30L60CT is the preferred substitute for the 30CTQ060. This part maintains identical electrical specifications: 60 V reverse voltage rating and 15 A average rectified current per diode in the same TO-220-3 package. The STPS30L60CT is in active production status with ROHS3 compliance certification, ensuring long-term supply availability and regulatory alignment. Forward voltage characteristics (600 mV @ 15 A) are equivalent to the original part. Inventory availability is substantial at 35,800 pieces.

Secondary Recommendation: STPS30H60CT (STMicroelectronics)

The STPS30H60CT provides identical voltage and current ratings in the same TO-220-3 package with active product status and ROHS3 compliance. This part features a higher maximum junction temperature rating (175°C versus 150°C), which provides enhanced thermal margin in high-temperature applications. Forward voltage is slightly elevated at 660 mV @ 15 A. Reverse leakage current is significantly lower at 60 µA @ 60 V compared to the original 800 µA specification.

Alternative Recommendation: 30CTQ060 (SMC Diode Solutions)

The SMC Diode Solutions version of the 30CTQ060 maintains identical part number designation with matching electrical specifications and TO-220-3 packaging. This part is in active production status with ROHS3 compliance, addressing the obsolescence issue of the original Vishay component. Electrical characteristics are identical to the original part, including forward voltage of 620 mV @ 15 A.

Package Alternative: STPS3060CW (STMicroelectronics)

For applications where package footprint flexibility is acceptable, the STPS3060CW provides identical electrical ratings (60 V, 15 A) in a TO-247-3 through-hole package. This part is in active production with ROHS3 compliance. The TO-247-3 package offers improved thermal performance through larger lead geometry. Forward voltage is higher at 850 mV @ 15 A, which must be evaluated for thermal impact in the application circuit.

Reduced Current Alternative: STPS20L60CT (STMicroelectronics)

The STPS20L60CT is suitable only for applications where the circuit current requirement does not exceed 10 A per diode. This part maintains the 60 V reverse voltage rating and TO-220-3 package in active production with ROHS3 compliance. Forward voltage is optimized at 600 mV @ 10 A.

Not Recommended: STPS30L45CT

The STPS30L45CT has a reduced reverse voltage rating of 45 V and is suitable only for applications with maximum circuit voltage of 45 V or lower. This part is not a direct substitute for 60 V applications.

Not Recommended: STPS41L60CT

The STPS41L60CT is rated for 20 A average rectified current, exceeding the original 15 A specification. While this part maintains 60 V rating and TO-220-3 packaging, it is oversized for the 30CTQ060 application and introduces unnecessary cost and thermal dissipation.

Not Recommended: MBR30L60CTG (onsemi)

Although the MBR30L60CTG maintains identical electrical specifications and packaging, this part is classified as obsolete. Selection of obsolete components does not resolve the supply chain continuity issue that necessitates finding a substitute for the original 30CTQ060.

Frequently Asked Questions (FAQ)

Q: Can the STPS30L60CT be used as a direct replacement for the 30CTQ060 without circuit modification?

A: Yes. The STPS30L60CT maintains identical voltage rating (60 V), current rating (15 A per diode), diode configuration (1 Pair Common Cathode), and package (TO-220-3). Forward voltage characteristics are equivalent at 600 mV @ 15 A. No circuit modification is required.

Q: What is the difference between STPS30L60CT and STPS30H60CT?

A: Both parts maintain identical 60 V and 15 A ratings in TO-220-3 packaging. The STPS30H60CT features a higher maximum junction temperature (175°C versus 150°C) and lower reverse leakage current (60 µA versus 480 µA at 60 V). Forward voltage is slightly higher at 660 mV @ 15 A for the STPS30H60CT. Selection depends on thermal requirements and leakage current sensitivity in the application.

Q: Why is the SMC Diode Solutions 30CTQ060 listed as an alternative if it has the same part number as the original?

A: The SMC Diode Solutions version carries the same part number but is manufactured by a different supplier. This part is in active production status with ROHS3 compliance, whereas the original Vishay part is obsolete and non-compliant. The SMC version provides identical electrical and mechanical specifications with current manufacturing support.

Q: Can the STPS3060CW be used if the application circuit has space constraints?

A: The STPS3060CW uses a TO-247-3 package, which is physically larger than the TO-220-3 package of the 30CTQ060. This part is suitable only if the application circuit board has sufficient space for the larger package footprint. Electrical specifications are identical at 60 V and 15 A.

Q: Is the STPS20L60CT suitable for my application?

A: The STPS20L60CT is suitable only if the maximum circuit current does not exceed 10 A per diode. If the application requires 15 A per diode as specified for the 30CTQ060, the STPS20L60CT will be undersized and may experience thermal stress or failure. Verify circuit current requirements before selection.

Q: What does "1 Pair Common Cathode" configuration mean?

A: This configuration contains two diodes within a single package with a shared cathode terminal. The two anodes are independent. This configuration is used in bridge rectifier and dual-diode applications where a common return path is required.

Q: Are all recommended substitutes RoHS compliant?

A: All active production substitutes listed (STPS30L60CT, STPS30H60CT, STPS3060CW, STPS20L60CT, STPS30L45CT, STPS41L60CT, and SMC 30CTQ060) are ROHS3 compliant. The original Vishay 30CTQ060 is non-compliant. RoHS compliance is mandatory for applications subject to EU Directive 2011/65/EU or equivalent regulations.

Q: What is the significance of "Fast Recovery ≤ 500ns, > 200mA (Io)"?

A: This specification indicates that all substitute parts maintain the same fast recovery switching speed characteristic as the original part. Recovery time of 500 nanoseconds or less is suitable for high-frequency rectification applications. This parameter is consistent across all listed substitutes.

Q: Can I use a substitute part with lower reverse leakage current?

A: Yes. Lower reverse leakage current is a beneficial characteristic that does not affect circuit compatibility. Parts with lower leakage current (such as STPS30H60CT at 60 µA versus the original 800 µA) will reduce standby power dissipation and heat generation in the application.

Q: What is the difference between TO-220-3 and TO-220AB packaging?

A: TO-220-3 and TO-220AB are equivalent designations for the same three-lead through-hole package. Both refer to the standard TO-220 package with three leads suitable for diode array configurations. No functional or mechanical difference exists between these designations.

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