MBRF1535CTHE3/45 Equivalent & Substitute Parts

Part Overview

The MBRF1535CTHE3/45 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 with 7.5 A average rectified current per diode. The device is packaged in a TO-220-3 Full Pack with isolated tab for through-hole mounting applications.

The MBRF1535CTHE3/45 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.

Substiute Parts

MBRF1535CTHE3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 1234MBRF1535CTHE3/45 Datasheet

Current PartRFQ

MBRF1545CTHE3/45

Vishay General Semiconductor - Diodes DivisionIn Stock: 917MBRF1545CTHE3/45 Datasheet

MFR RecommendedRFQ

STPS1545FP

STMicroelectronicsIn Stock: 1554STPS1545FP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MBRF1535CTHE3/45 is determined by the following critical parameters:

Configuration and Technology Requirements: The substitute part must maintain Schottky diode technology and support a 1 Pair Common Cathode configuration to ensure functional compatibility with existing circuit designs.

Electrical Performance Criteria: Substitute parts must meet or exceed the following electrical specifications:

• Voltage - DC Reverse (Vr) rating of 35 V or higher
• Current - Average Rectified (Io) rating of 7.5 A or higher per diode
• Forward voltage (Vf) characteristics compatible with circuit operation
• Fast recovery speed ≤ 500ns for > 200mA (Io)

Mechanical and Thermal Compatibility: The substitute must utilize through-hole mounting with a compatible package footprint. Operating temperature range must support the application's thermal requirements.

Compliance and Quality Standards: Substitute parts must maintain automotive-grade qualification (AEC-Q101) and ROHS3 compliance to satisfy regulatory and quality requirements.

Two substitute parts meet these criteria: the MBRF1545CTHE3/45 from Vishay and the STPS1545FP from STMicroelectronics. These parts are grouped based on their ability to satisfy the electrical and mechanical requirements of the original design.

Parameter Comparison

Engineering Selection Recommendations

MBRF1545CTHE3/45 (Vishay General Semiconductor - Diodes Division)

The MBRF1545CTHE3/45 is the primary substitute for the obsolete MBRF1535CTHE3/45. This part maintains identical diode configuration (1 Pair Common Cathode), identical package type (TO-220-3 Full Pack, Isolated Tab), and identical forward voltage characteristics (570 mV @ 7.5 A). The MBRF1545CTHE3/45 provides a higher DC reverse voltage rating of 45 V compared to the original 35 V specification, offering enhanced voltage margin. Both parts carry automotive-grade qualification (AEC-Q101) and ROHS3 compliance. The MBRF1545CTHE3/45 is currently in active production status with confirmed inventory availability.

STPS1545FP (STMicroelectronics)

The STPS1545FP is an alternative substitute that meets the core electrical requirements of fast recovery Schottky diode technology with 45 V DC reverse voltage rating and fast recovery speed. This part provides higher current capacity (15 A versus 7.5 A) and extended maximum junction temperature (175°C versus 150°C). However, the STPS1545FP differs in package configuration (TO-220-2 Full Pack versus TO-220-3 Full Pack, Isolated Tab), diode configuration (single diode versus 1 Pair Common Cathode), and forward voltage characteristics (840 mV @ 30 A). The STPS1545FP does not carry specified automotive-grade qualification or AEC-Q101 certification. This part is suitable only for applications where the package footprint change and single-diode configuration are acceptable.

For applications requiring direct form-factor and functional compatibility with the original MBRF1535CTHE3/45, the MBRF1545CTHE3/45 is the appropriate selection. The STPS1545FP is suitable only when circuit design modifications to accommodate package and configuration differences are feasible.

Frequently Asked Questions (FAQ)

Q: Can the MBRF1545CTHE3/45 be used as a direct replacement for the MBRF1535CTHE3/45?

A: Yes. The MBRF1545CTHE3/45 maintains identical diode configuration, package type, and forward voltage characteristics. The higher 45 V DC reverse voltage rating provides additional voltage margin and is compatible with circuits designed for 35 V operation. Both parts carry AEC-Q101 automotive qualification and ROHS3 compliance.

Q: What is the primary difference between the MBRF1545CTHE3/45 and STPS1545FP?

A: The MBRF1545CTHE3/45 is a 1 Pair Common Cathode diode array in TO-220-3 Full Pack with isolated tab, while the STPS1545FP is a single Schottky diode in TO-220-2 Full Pack. The STPS1545FP provides higher current capacity (15 A) and higher maximum junction temperature (175°C) but requires circuit board layout modifications due to package differences. The MBRF1545CTHE3/45 maintains the original form factor and configuration.

Q: Is the STPS1545FP suitable for automotive applications?

A: The STPS1545FP does not carry specified automotive-grade qualification or AEC-Q101 certification. Applications requiring automotive-grade components should use the MBRF1545CTHE3/45, which maintains full automotive qualification.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: Schottky diode technology, 1 Pair Common Cathode configuration, DC reverse voltage rating of 35 V or higher, average rectified current of 7.5 A or higher per diode, fast recovery speed ≤ 500ns, through-hole mounting capability, and compatible package footprint. Automotive-grade qualification and AEC-Q101 certification are required for automotive applications.

Q: Can I use the STPS1545FP in a design originally specified for the MBRF1535CTHE3/45?

A: The STPS1545FP can be used only if circuit design modifications are acceptable. The package footprint differs (TO-220-2 versus TO-220-3), the diode configuration differs (single diode versus 1 Pair Common Cathode), and the forward voltage characteristics differ. Circuit board layout and schematic changes are required. For direct replacement without design modifications, use the MBRF1545CTHE3/45.

Q: What is the inventory status of these substitute parts?

A: The MBRF1545CTHE3/45 has 821 pieces in stock. The STPS1545FP has 1450 pieces in stock. Both parts are in active production status.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The MBRF1545CTHE3/45 and STPS1545FP are both ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).