VS-25CTQ035PBF Equivalent & Substitute Parts

Part Overview

The VS-25CTQ035PBF is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 35 V DC reverse voltage and 30 A average rectified current per diode in a Through Hole TO-220-3 package. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain electrical and mechanical compatibility for existing designs and new production requirements.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V
Current - Average Rectified (Io) (per Diode)	30 A
Voltage - Forward (Vf) (Max) @ If	710 mV @ 30 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1.75 mA @ 35 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the VS-25CTQ035PBF is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 35 V minimum
Current - Average Rectified (Io) (per Diode): 30 A minimum
Mounting Type: Through Hole
Package / Case: TO-220-3

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Variations within typical Schottky diode specifications
Current - Reverse Leakage @ Vr: Variations within acceptable leakage ranges
Operating Temperature - Junction: Extended ranges are acceptable

Substitute parts must satisfy all critical matching parameters. Parts that exceed the voltage or current ratings are acceptable for direct substitution. Parts with reduced current ratings or voltage ratings below the specified values are not suitable substitutes.

Parameter Comparison

Parameter	VS-25CTQ035PBF	VS-25CTQ035-M3	MBR2535CTG	STPS3045CT
Manufacturer	Vishay	Vishay	onsemi	STMicroelectronics
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V	35 V	35 V	45 V
Current - Average Rectified (Io) (per Diode)	30 A	30 A	30 A	15 A
Voltage - Forward (Vf) (Max) @ If	710 mV @ 30 A	710 mV @ 30 A	820 mV @ 30 A	570 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1.75 mA @ 35 V	1.75 mA @ 35 V	200 µA @ 35 V	200 µA @ 45 V
Operating Temperature - Junction	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 175°C	Max 200°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Discontinued	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

VS-25CTQ035-M3 (Vishay)

The VS-25CTQ035-M3 is the direct equivalent substitute for the VS-25CTQ035PBF. Both parts share identical electrical specifications, diode configuration, and package format. The VS-25CTQ035-M3 is currently in active production status with 1007 pieces in stock. This part is the primary recommendation for direct replacement in all applications previously using the VS-25CTQ035PBF. The only difference is packaging format (Tube versus unspecified original packaging), which does not affect electrical performance or mechanical compatibility.

MBR2535CTG (onsemi)

The MBR2535CTG manufactured by onsemi meets all critical electrical parameters for substitution. It maintains the 35 V reverse voltage rating and 30 A current rating with identical TO-220-3 package configuration. The forward voltage specification is slightly higher at 820 mV compared to 710 mV, and reverse leakage is lower at 200 µA. The operating temperature range extends to 175°C maximum junction temperature, providing enhanced thermal performance. This part is in active production with 1966 pieces in stock and is suitable for applications where the slightly elevated forward voltage is acceptable.

STPS3045CT (STMicroelectronics)

The STPS3045CT does not qualify as a direct substitute. While it maintains the 1 Pair Common Cathode Schottky configuration and TO-220-3 package, the current rating is reduced to 15 A per diode, which falls below the required 30 A specification. The voltage rating is increased to 45 V, which exceeds application requirements. This part is suitable only for applications with reduced current demands and is not recommended for designs requiring the full 30 A rating of the original VS-25CTQ035PBF.

Frequently Asked Questions (FAQ)

Q: Can the VS-25CTQ035-M3 be used as a direct replacement for the VS-25CTQ035PBF?

A: Yes. The VS-25CTQ035-M3 is electrically and mechanically identical to the VS-25CTQ035PBF. Both parts feature the same 35 V reverse voltage, 30 A current rating, 1 Pair Common Cathode configuration, and TO-220-3 package. The only difference is the packaging format (Tube). This part is the recommended substitute.

Q: What are the key differences between the MBR2535CTG and the original VS-25CTQ035PBF?

A: The MBR2535CTG maintains the same voltage and current ratings (35 V, 30 A) and package format (TO-220-3). The forward voltage is higher at 820 mV versus 710 mV, and reverse leakage is lower at 200 µA versus 1.75 mA. The operating temperature range extends to 175°C. These differences do not prevent substitution in most applications.

Q: Why is the STPS3045CT not recommended as a substitute?

A: The STPS3045CT has a reduced current rating of 15 A per diode, which is insufficient for applications requiring the 30 A specification of the VS-25CTQ035PBF. Although the voltage rating is higher at 45 V, the current limitation makes this part unsuitable for direct replacement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The VS-25CTQ035-M3, MBR2535CTG, and STPS3045CT are all ROHS3 compliant, matching the compliance status of the original VS-25CTQ035PBF.

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

A: The TO-220-3 package is a Through Hole mounting format with three leads. All substitute parts use this identical package, ensuring mechanical compatibility with existing PCB layouts and thermal management solutions designed for the original part.

Q: Can forward voltage differences affect circuit performance?

A: Forward voltage differences between Schottky diodes can affect voltage drop across the component. The MBR2535CTG has a forward voltage of 820 mV compared to 710 mV for the original part. In applications where voltage drop is critical, this 110 mV difference should be evaluated against circuit design margins.

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

A: This configuration contains two diodes within a single package with a shared cathode connection. The common cathode terminal is internally connected, reducing the number of external leads required. All substitute parts maintain this identical configuration.

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