MBR1535CT Equivalent & Substitute Parts

Part Overview

The MBR1535CT is a Schottky diode array manufactured by Diodes Incorporated, configured as 1 pair common cathode with a maximum reverse voltage of 35 V and average rectified current of 15 A per diode. The device is packaged in TO-220-3 through-hole configuration and is classified as obsolete product status. Due to obsolescence, equivalent and substitute parts from active manufacturers are 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)	15 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 15 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	100 µA @ 35 V
Operating Temperature - Junction	-65°C ~ 150°C
Mounting Type	Through Hole
Package / Case	TO-220-3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MBR1535CT are classified into two categories based on parametric alignment:

Parametric Equivalents maintain identical electrical specifications for voltage (35 V), current (15 A per diode), forward voltage drop (840 mV @ 15 A), and fast recovery speed characteristics. These parts are direct functional replacements with the same diode configuration and package type.

Manufacturer Recommended Substitute (STPS1545CT) differs in maximum reverse voltage (45 V) and average rectified current (7.5 A per diode), representing a higher voltage but lower current rated alternative. This substitute is applicable only in applications where the reduced current rating is acceptable and the higher voltage rating provides design margin.

All substitute parts maintain the following critical parameters:

Diode configuration: 1 Pair Common Cathode
Technology: Schottky
Mounting type: Through Hole
Package: TO-220-3
Fast recovery speed: ≤ 500ns, > 200mA (Io)
RoHS3 compliance
MSL 1 (Unlimited)

Parameter Comparison

Parameter	MBR1535CT	15CTQ035	MBR1535CT C0G	MBR1535CTHC0G	STPS1545CT
Manufacturer	Diodes Incorporated	SMC Diode Solutions	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	35 V	35 V	35 V	35 V	45 V
Current - Average Rectified (Io) (per Diode)	15 A	15 A	15 A	15 A	7.5 A
Voltage - Forward (Vf) (Max) @ If	840 mV @ 15 A	840 mV @ 15 A	840 mV @ 15 A	840 mV @ 15 A	570 mV @ 7.5 A
Current - Reverse Leakage @ Vr	100 µA @ 35 V	1 mA @ 35 V	500 µA @ 35 V	500 µA @ 35 V	100 µA @ 45 V
Operating Temperature - Junction (Max)	150°C	150°C	150°C	150°C	175°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Automotive Grade	No	No	No	Yes (AEC-Q101)	No

Engineering Selection Recommendations

For Direct Parametric Replacement:

The 15CTQ035 (SMC Diode Solutions) and MBR1535CT C0G (Taiwan Semiconductor Corporation) are parametric equivalents with identical voltage and current ratings. Both are active products with ROHS3 compliance. The 15CTQ035 maintains REACH Affected status consistent with the original part. The MBR1535CT C0G offers REACH Unaffected status, which may be advantageous for certain supply chain requirements.

For Automotive Applications:

The MBR1535CTHC0G (Taiwan Semiconductor Corporation) is qualified to AEC-Q101 automotive standard and maintains identical electrical specifications to the original MBR1535CT. This variant is suitable for automotive-grade applications requiring formal qualification documentation.

For Higher Voltage Margin Applications:

The STPS1545CT (STMicroelectronics) provides a higher maximum reverse voltage rating of 45 V with a lower maximum junction temperature of 175°C. This substitute is applicable only in applications where the reduced current rating of 7.5 A per diode is acceptable and the higher voltage rating provides necessary design margin. The lower forward voltage drop (570 mV @ 7.5 A) may reduce thermal dissipation in current-limited applications.

All active substitute parts maintain fast recovery Schottky technology, through-hole TO-220-3 packaging, and MSL 1 moisture sensitivity classification.

Frequently Asked Questions (FAQ)

Q: Can the STPS1545CT directly replace the MBR1535CT in all applications?

A: The STPS1545CT is not a direct replacement. While it maintains the same diode configuration, package, and fast recovery characteristics, it has a reduced average rectified current rating of 7.5 A per diode compared to the original 15 A specification. It is suitable only for applications where the circuit current requirement does not exceed 7.5 A per diode. The higher reverse voltage rating of 45 V provides additional voltage margin.

Q: What is the difference between the parametric equivalents from SMC Diode Solutions and Taiwan Semiconductor Corporation?

A: The 15CTQ035 and MBR1535CT C0G both maintain identical electrical specifications (35 V, 15 A, 840 mV forward voltage). The primary differences are reverse leakage current (15CTQ035: 1 mA @ 35 V versus MBR1535CT C0G: 500 µA @ 35 V) and REACH compliance status. The MBR1535CT C0G and MBR1535CTHC0G are available from the same manufacturer, with the latter offering AEC-Q101 automotive qualification.

Q: Is the MBR1535CTHC0G suitable for automotive applications?

A: Yes. The MBR1535CTHC0G is qualified to AEC-Q101 automotive standard and maintains identical electrical specifications to the original MBR1535CT. It is designed for automotive-grade applications requiring formal qualification documentation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (15CTQ035, MBR1535CT C0G, MBR1535CTHC0G, and STPS1545CT) are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity classification.

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

A: The TO-220-3 package is a through-hole configuration with three leads, suitable for PCB mounting with mechanical fastening. All listed substitute parts maintain this identical package type, ensuring mechanical and electrical compatibility with existing PCB designs without layout modifications.

Q: How do reverse leakage current differences affect part selection?

A: Reverse leakage current affects thermal dissipation and circuit performance at maximum reverse voltage. The original MBR1535CT specifies 100 µA @ 35 V. The 15CTQ035 specifies 1 mA @ 35 V (higher leakage), while MBR1535CT C0G and MBR1535CTHC0G specify 500 µA @ 35 V (intermediate leakage). Applications sensitive to leakage current should select parts with specifications matching the original design requirements.

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