60CTQ045 Schottky Diode Array Equivalent & Substitute Parts

Part Overview

The 60CTQ045 is a Schottky diode array in a 1 Pair Common Cathode configuration rated for 45 V DC reverse voltage and 30 A average rectified current per diode. Manufactured by Vishay General Semiconductor - Diodes Division, this component is packaged in TO-220-3 through-hole format with fast recovery characteristics suitable for high-frequency rectification applications.

The 60CTQ045 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this diode array.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	45	V
Current - Average Rectified (Io) (per Diode)	30	A
Voltage - Forward (Vf) (Max) @ If	560 mV @ 30 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	2	mA @ 45 V
Operating Temperature - Junction	−65 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3	—

Substitute Part Grouping Explanation

Substitution of the 60CTQ045 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V
Mounting Type: Through Hole
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Current Rating Grouping: Substitute parts are organized into two categories based on average rectified current per diode:

30 A Current Rating (Direct Equivalents): Parts rated for 30 A average rectified current provide identical current-handling capability to the 60CTQ045.
15 A Current Rating (Reduced Current Substitutes): Parts rated for 15 A average rectified current are suitable for applications where the full 30 A capability is not required. These parts maintain all other electrical and mechanical parameters.

Package Consideration: The TO-220-3 package is the standard form factor. The TO-247-3 variant represents a different mechanical package with identical electrical specifications and is suitable only where mechanical footprint changes are acceptable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Io (per Diode)	Vf (Max) @ If	Ir @ Vr	Tj (Max)	Package	Product Status	RoHS Status
60CTQ045	Vishay General Semiconductor	30 A	560 mV @ 30 A	2 mA @ 45 V	150°C	TO-220-3	Obsolete	Non-compliant
MBR60L45CTG	onsemi	30 A	550 mV @ 30 A	1.2 mA @ 45 V	175°C	TO-220-3	Active	ROHS3 Compliant
STPS61L45CT	STMicroelectronics	30 A	560 mV @ 30 A	1.5 mA @ 45 V	150°C	TO-220-3	Active	ROHS3 Compliant
STPS61L45CW	STMicroelectronics	30 A	560 mV @ 30 A	1.5 mA @ 45 V	150°C	TO-247-3	Active	ROHS3 Compliant
MBR2545CTG	onsemi	15 A	620 mV @ 15 A	200 µA @ 45 V	175°C	TO-220-3	Active	ROHS3 Compliant
STPS30L45CT	STMicroelectronics	15 A	550 mV @ 15 A	400 µA @ 45 V	150°C	TO-220-3	Active	ROHS3 Compliant
MBRP3045NTU	Fairchild Semiconductor	15 A	650 mV @ 15 A	1 mA @ 45 V	150°C	TO-220-3	Active	Not specified

Engineering Selection Recommendations

For Direct Replacement (30 A Current Rating, TO-220-3 Package):

The MBR60L45CTG (onsemi) and STPS61L45CT (STMicroelectronics) are active production parts that provide electrical equivalence to the 60CTQ045. Both parts maintain the 30 A average rectified current rating, 45 V reverse voltage rating, and TO-220-3 package form factor. Both are ROHS3 compliant, addressing regulatory requirements that the obsolete 60CTQ045 does not meet. The MBR60L45CTG offers an extended maximum junction temperature of 175°C compared to 150°C for the STPS61L45CT.

For Reduced Current Applications (15 A Current Rating, TO-220-3 Package):

The MBR2545CTG (onsemi), STPS30L45CT (STMicroelectronics), and MBRP3045NTU (Fairchild Semiconductor) are suitable for applications where the 30 A current capability is not required. All three maintain the 45 V reverse voltage rating, Schottky technology, 1 Pair Common Cathode configuration, and TO-220-3 package. All are active production parts. The MBR2545CTG and MBRP3045NTU offer extended or equivalent maximum junction temperatures.

For Mechanical Package Variation (30 A Current Rating, TO-247-3 Package):

The STPS61L45CW (STMicroelectronics) provides electrical equivalence to the 60CTQ045 with identical 30 A current rating and 45 V reverse voltage rating. This part is packaged in TO-247-3 format, which differs mechanically from the TO-220-3 standard. Selection of this part is appropriate only when the TO-247-3 package footprint is compatible with the application design.

Compliance Consideration:

All recommended active production substitutes are ROHS3 compliant, providing regulatory advantage over the obsolete, non-compliant 60CTQ045.

Frequently Asked Questions (FAQ)

Q: Can the MBR60L45CTG directly replace the 60CTQ045 in existing designs?

A: Yes. The MBR60L45CTG maintains identical electrical specifications for voltage rating (45 V), current rating (30 A), diode configuration (1 Pair Common Cathode), technology (Schottky), and package form factor (TO-220-3). Pin-to-pin compatibility is preserved.

Q: What is the difference between 30 A and 15 A rated substitutes?

A: The 30 A rated substitutes (MBR60L45CTG, STPS61L45CT) are electrically equivalent to the 60CTQ045 and support the full current capacity. The 15 A rated substitutes (MBR2545CTG, STPS30L45CT, MBRP3045NTU) are suitable only for applications where the circuit current does not exceed 15 A per diode. All maintain the same 45 V reverse voltage rating and Schottky technology.

Q: Why is the STPS61L45CW listed separately from the STPS61L45CT?

A: Both parts are manufactured by STMicroelectronics with identical electrical specifications (30 A, 45 V, Schottky, 1 Pair Common Cathode). The STPS61L45CW is packaged in TO-247-3 format, while the STPS61L45CT uses TO-220-3 format. The TO-247-3 package has different mechanical dimensions and pin spacing. Selection depends on whether the application PCB layout accommodates the TO-247-3 footprint.

Q: Are all substitute parts RoHS compliant?

A: All recommended active production substitutes are ROHS3 compliant. The original 60CTQ045 is RoHS non-compliant. Compliance status should be verified against specific application regulatory requirements.

Q: What is the significance of forward voltage (Vf) differences among substitutes?

A: Forward voltage variations among Schottky diodes are normal and typically range from 550 mV to 650 mV at rated current. The 60CTQ045 specifies 560 mV @ 30 A. Substitutes with similar Vf values (MBR60L45CTG at 550 mV, STPS61L45CT at 560 mV) exhibit comparable thermal and efficiency characteristics. Higher Vf values (such as 620 mV or 650 mV in 15 A rated parts) result in increased forward voltage drop and heat dissipation in the application circuit.

Q: Can I use a 15 A substitute in a 30 A application?

A: No. Using a 15 A rated part in an application requiring 30 A operation will result in device overstress, excessive heat generation, and potential failure. Current rating selection must match or exceed the application requirement.

Q: What is the maximum junction temperature consideration?

A: The 60CTQ045 specifies a maximum junction temperature of 150°C. The MBR60L45CTG extends this to 175°C, providing improved thermal margin. The STPS61L45CT maintains 150°C. Application thermal design should account for the specified maximum junction temperature to ensure reliable long-term operation.

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