MBR1535CT Equivalent & Substitute Parts

Part Overview

The MBR1535CT is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with a maximum reverse voltage of 35 V and average rectified current of 7.5 A per diode. The device is packaged in TO-220-3 through-hole configuration and operates across a junction temperature range of -65°C to 175°C. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

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)	7.5 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 35 V
Operating Temperature - Junction	-65°C ~ 175°C
Mounting Type	Through Hole
Package / Case	TO-220-3
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the MBR1535CT are classified into three categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalent (MBR1535CTG): Identical electrical specifications and package configuration. Differs only in RoHS compliance status (ROHS3 Compliant versus RoHS non-compliant).

Similar Manufacturer Parts (15CTQ035, STPS1545CT): Share the same diode configuration, technology, package type, and mounting method. Variations exist in current rating, reverse voltage rating, forward voltage characteristics, and reverse leakage current. These parts are functionally compatible within specific application constraints.

Parametric Equivalent (VS-MBR1535CT-M3): Matches all critical electrical parameters and package configuration. Manufactured by Vishay General Semiconductor - Diodes Division with active product status.

Substitution eligibility is determined by the following key parameters: diode configuration (1 pair common cathode), technology (Schottky), package type (TO-220-3), mounting method (through hole), and electrical ratings within acceptable application tolerances.

Parameter Comparison

Parameter	MBR1535CT	MBR1535CTG	15CTQ035	STPS1545CT	VS-MBR1535CT-M3
Manufacturer	onsemi	onsemi	SMC Diode Solutions	STMicroelectronics	Vishay General Semiconductor - Diodes Division
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V	35 V	35 V	45 V	35 V
Current - Average Rectified (Io) (per Diode)	7.5 A	7.5 A	15 A	7.5 A	7.5 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 15 A	840 mV @ 15 A	840 mV @ 15 A	570 mV @ 7.5 A	840 mV @ 15 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 35 V	100 µA @ 35 V	1 mA @ 35 V	100 µA @ 45 V	100 µA @ 35 V
Operating Temperature - Junction	-65°C ~ 175°C	-65°C ~ 175°C	-55°C ~ 150°C	Max 175°C	-65°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

MBR1535CTG is the primary direct equivalent for MBR1535CT applications. Both parts share identical electrical specifications and package configuration. MBR1535CTG offers the advantage of ROHS3 compliance, addressing regulatory requirements for new designs while maintaining full electrical compatibility.

VS-MBR1535CT-M3 provides a parametric equivalent alternative with active product status from Vishay General Semiconductor - Diodes Division. This part matches all critical electrical parameters and package specifications of the original MBR1535CT, offering long-term availability and supply chain continuity.

15CTQ035 from SMC Diode Solutions is suitable for applications requiring higher current capacity (15 A per diode versus 7.5 A). This part maintains the 35 V reverse voltage rating and identical forward voltage characteristics. The higher current rating provides design margin in current-limited applications. Operating temperature range is reduced to -55°C to 150°C, and reverse leakage current is elevated to 1 mA at 35 V.

STPS1545CT from STMicroelectronics is applicable where higher reverse voltage rating (45 V) is beneficial for circuit protection margins. This part maintains the 7.5 A current rating and offers improved forward voltage characteristics (570 mV @ 7.5 A versus 840 mV @ 15 A). Maximum junction temperature is specified at 175°C. Reverse leakage current remains at 100 µA at the higher 45 V rating.

Selection between substitute parts depends on application requirements for current capacity, reverse voltage margin, forward voltage losses, and operating temperature range. All substitute parts maintain the TO-220-3 package and through-hole mounting configuration, ensuring mechanical compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can MBR1535CTG be used as a direct replacement for MBR1535CT?

A: Yes. MBR1535CTG is electrically and mechanically identical to MBR1535CT. The primary difference is ROHS3 compliance status. Both parts feature 35 V reverse voltage, 7.5 A average rectified current per diode, 840 mV forward voltage at 15 A, and TO-220-3 package configuration.

Q: What are the key differences between MBR1535CT and 15CTQ035?

A: The 15CTQ035 provides double the current capacity (15 A per diode versus 7.5 A) while maintaining the same 35 V reverse voltage rating and forward voltage characteristics. Operating temperature range is reduced from -65°C to 175°C to -55°C to 150°C. Reverse leakage current increases from 100 µA to 1 mA at 35 V.

Q: When should STPS1545CT be selected over MBR1535CT?

A: STPS1545CT is selected when higher reverse voltage rating (45 V versus 35 V) is required for circuit protection or when lower forward voltage losses are beneficial (570 mV @ 7.5 A versus 840 mV @ 15 A). Current rating remains at 7.5 A per diode. Maximum junction temperature is 175°C.

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

A: Yes. All substitute parts listed are packaged in TO-220-3 through-hole configuration, ensuring mechanical compatibility with existing PCB designs and footprints.

Q: What is the significance of product status (Obsolete versus Active) for part selection?

A: Active product status indicates ongoing manufacturing and long-term availability. MBR1535CTG, 15CTQ035, STPS1545CT, and VS-MBR1535CT-M3 all carry active status, providing supply chain continuity. The original MBR1535CT is obsolete, making substitutes necessary for new procurement.

Q: How does RoHS compliance affect part selection?

A: ROHS3 compliance is required for products sold in regulated markets. MBR1535CTG, 15CTQ035, and STPS1545CT are ROHS3 compliant. MBR1535CT is RoHS non-compliant. For new designs or regulated applications, ROHS3 compliant alternatives are required.

Q: Can VS-MBR1535CT-M3 be used in all applications where MBR1535CT is specified?

A: Yes. VS-MBR1535CT-M3 matches all critical electrical parameters of MBR1535CT: 35 V reverse voltage, 7.5 A average rectified current per diode, 840 mV forward voltage at 15 A, fast recovery speed, and TO-220-3 package. Operating temperature range is -65°C to 150°C versus -65°C to 175°C for the original part.

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