MBRB1535CT Equivalent & Substitute Parts

Part Overview

The MBRB1535CT 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 7.5 A average rectified current per diode, housed in a TO-263-3 D2PAK surface mount package. The MBRB1535CT is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement requirements. Active alternatives with identical or superior electrical specifications are available from Vishay and other manufacturers.

Key Parameters

Parameter	Value	Unit
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	570 mV @ 7.5 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	100 µA @ 35 V	—
Operating Temperature - Junction	-65°C ~ 150°C	—
Mounting Type	Surface Mount	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MBRB1535CT is determined by the following critical parameters: diode configuration (1 Pair Common Cathode), technology (Schottky), maximum reverse voltage (35 V minimum), average rectified current per diode (7.5 A minimum), forward voltage drop (570 mV maximum @ 7.5 A), recovery speed (Fast Recovery ≤ 500ns), reverse leakage current (100 µA maximum @ 35 V), operating junction temperature range (-65°C to 150°C minimum), and package type (TO-263-3 D2PAK surface mount).

Substitute parts are grouped into three categories:

Parametric Equivalents (Vishay ROHS3 Compliant Active Parts): VS-MBRB1535CTL-M3, VS-MBRB1535CTR-M3, VS-MBRB1545CTL-M3, and VS-MBRB1545CTR-M3 meet or exceed all electrical specifications of the MBRB1535CT while offering active product status and ROHS3 compliance. These parts differ only in packaging format (Tape & Reel) and RoHS certification status.

Direct Manufacturer Equivalent (Higher Current Rating): The 12TQ035S from SMC Diode Solutions provides identical reverse voltage (35 V) and recovery speed characteristics but offers doubled average rectified current (15 A per diode), making it suitable for applications requiring higher current capacity within the same voltage class.

Manufacturer Recommended Substitute (Higher Voltage Rating): The STPS1545CG-TR from STMicroelectronics maintains the 1 Pair Common Cathode configuration, 7.5 A current rating, and D2PAK package while providing elevated reverse voltage rating (45 V), offering enhanced voltage margin for the same current and package specifications.

Parameter Comparison

Parameter	MBRB1535CT	VS-MBRB1535CTL-M3	VS-MBRB1535CTR-M3	VS-MBRB1545CTL-M3	VS-MBRB1545CTR-M3	12TQ035S	STPS1545CG-TR
Manufacturer	Vishay	Vishay	Vishay	Vishay	Vishay	SMC Diode Solutions	STMicroelectronics
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode	Single Diode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	35 V	35 V	35 V	35 V	35 V	35 V	45 V
Current - Average Rectified (Io)	7.5 A	7.5 A	7.5 A	7.5 A	7.5 A	15 A	7.5 A
Voltage - Forward (Vf) (Max) @ If	570 mV @ 7.5 A	570 mV @ 7.5 A	570 mV @ 7.5 A	570 mV @ 7.5 A	570 mV @ 7.5 A	560 mV @ 15 A	570 mV @ 7.5 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 35 V	100 µA @ 35 V	100 µA @ 35 V	100 µA @ 35 V	100 µA @ 35 V	1 mA @ 35 V	100 µA @ 45 V
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 175°C	Max 175°C
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS Non-Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications with Active Status):

Select VS-MBRB1535CTL-M3 or VS-MBRB1535CTR-M3 for applications requiring exact electrical and mechanical compatibility with the obsolete MBRB1535CT. Both parts are manufactured by Vishay, maintain identical electrical parameters, and are ROHS3 compliant with active product status. The suffix designations (L-M3 and R-M3) indicate different packaging formats; both are supplied in Tape & Reel format. Current inventory levels support production requirements (1074 and 1187 units respectively).

For Enhanced Current Capacity:

The 12TQ035S from SMC Diode Solutions provides doubled average rectified current (15 A per diode) while maintaining the 35 V reverse voltage rating and identical package footprint. This substitute is appropriate for designs requiring higher current handling within the same voltage class. Note that this part features a single diode configuration rather than a diode pair, requiring circuit topology verification. Reverse leakage current is elevated to 1 mA at 35 V. Operating temperature range extends to 175°C maximum.

For Enhanced Voltage Margin:

The STPS1545CG-TR from STMicroelectronics maintains the 1 Pair Common Cathode configuration, 7.5 A current rating, and D2PAK package while providing 45 V reverse voltage rating. This substitute is appropriate for applications where voltage margin enhancement is required without current derating. Electrical characteristics at rated current remain identical. Operating temperature maximum is 175°C. Inventory availability is substantial (7250 units).

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical package dimensions (TO-263-3 D2PAK). Selection should be based on specific application voltage and current requirements, compliance mandates, and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can VS-MBRB1535CTL-M3 and VS-MBRB1535CTR-M3 be used interchangeably with MBRB1535CT?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, diode configuration, and package type. The suffix designations indicate packaging format variations (Tape & Reel). Electrical performance and PCB footprint compatibility are identical.

Q: What is the primary difference between the Vishay substitute parts (VS-MBRB1535CTL-M3, VS-MBRB1535CTR-M3, VS-MBRB1545CTL-M3, VS-MBRB1545CTR-M3)?

A: The VS-MBRB1535CTL-M3 and VS-MBRB1535CTR-M3 provide exact electrical equivalence to MBRB1535CT. The VS-MBRB1545CTL-M3 and VS-MBRB1545CTR-M3 maintain identical electrical specifications but carry different base product numbers. All four parts are ROHS3 compliant and active products.

Q: Why is the 12TQ035S listed as a substitute if it has different current and configuration specifications?

A: The 12TQ035S is listed as a direct manufacturer equivalent based on the provided input parameters. It maintains 35 V reverse voltage and fast recovery Schottky technology in the same D2PAK package. However, it features a single diode configuration (not a diode pair) and 15 A current rating (versus 7.5 A). Circuit topology verification is required before substitution.

Q: Is the STPS1545CG-TR a direct replacement for MBRB1535CT?

A: The STPS1545CG-TR is a manufacturer-recommended substitute, not a direct replacement. It maintains the 1 Pair Common Cathode configuration, 7.5 A current rating, and D2PAK package, but provides elevated reverse voltage (45 V versus 35 V). This higher voltage rating is suitable for applications requiring enhanced voltage margin.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (VS-MBRB1535CTL-M3, VS-MBRB1535CTR-M3, VS-MBRB1545CTL-M3, VS-MBRB1545CTR-M3, 12TQ035S, and STPS1545CG-TR) are ROHS3 compliant. The original MBRB1535CT is RoHS non-compliant, making substitution necessary for RoHS-regulated applications.

Q: What is the moisture sensitivity level for all parts?

A: All parts, including the original MBRB1535CT and all substitutes, carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage and handling.

Q: Can I use STPS1545CG-TR in a circuit designed for 35 V operation?

A: Yes. The STPS1545CG-TR is rated for 45 V reverse voltage, which exceeds the 35 V requirement. The higher voltage rating provides additional safety margin. All other electrical parameters at 7.5 A operation remain identical to MBRB1535CT.

Q: What is the difference between Tape & Reel (TR) packaging and the original MBRB1535CT packaging?

A: The original MBRB1535CT packaging format is not specified in the provided data. The substitute parts VS-MBRB1535CTL-M3 and VS-MBRB1535CTR-M3 are supplied in Tape & Reel format, which is standard for automated assembly. The component itself and PCB footprint remain identical; only the delivery format differs.

Q: Are there inventory considerations for selecting a substitute?

A: Current inventory levels are: VS-MBRB1535CTL-M3 (1074 units), VS-MBRB1535CTR-M3 (1187 units), VS-MBRB1545CTL-M3 (1095 units), VS-MBRB1545CTR-M3 (978 units), 12TQ035S (1400 units), and STPS1545CG-TR (7250 units). Selection should account for production volume requirements and lead time considerations.

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