Equivalent & Substitute Parts for MA3D761

Part Overview

The MA3D761 is a Schottky diode array manufactured by Panasonic Electronic Components, configured as a 1 Pair Common Cathode arrangement with a maximum reverse voltage rating of 90 V and average rectified current of 10 A per diode. The device is packaged in a TO-220-3 Full Pack through-hole configuration. The MA3D761 is classified as obsolete, necessitating identification of functionally equivalent substitute components from active product lines to maintain design continuity and ensure ongoing component availability.

Substiute Parts

MA3D761

Panasonic Electronic ComponentsIn Stock: 944MA3D761 Datasheet

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MBRF10H150CTG

onsemiIn Stock: 1889MBRF10H150CTG Datasheet

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RB085T-90

Rohm SemiconductorIn Stock: 17357RB085T-90 Datasheet

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STPS10H100CFP

STMicroelectronicsIn Stock: 3348STPS10H100CFP Datasheet

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STPS20H100CT

STMicroelectronicsIn Stock: 196056STPS20H100CT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the MA3D761 are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode (all substitutes maintain this topology)
• Technology: Schottky (all substitutes utilize Schottky technology)
• Mounting Type: Through Hole (all substitutes are through-hole mounted)
• Package / Case: TO-220-3 Full Pack (all substitutes use compatible TO-220-3 packaging)

Electrical Compatibility Parameters:

• Voltage - DC Reverse (Vr) (Max): Substitute ratings must equal or exceed 90 V
• Current - Average Rectified (Io) (per Diode): Substitute ratings must equal or exceed 10 A
• Speed: All substitutes maintain Fast Recovery ≤ 500 ns, > 200 mA (Io)

Substitutes are grouped into two categories based on current rating alignment:

Category 1 - Full Current Rating Match (10 A): STPS20H100CT maintains the 10 A current specification of the original part while providing enhanced voltage rating and active product status.

Category 2 - Reduced Current Rating (5 A): MBRF10H150CTG, RB085T-90, and STPS10H100CFP operate at 5 A current rating, which is lower than the original 10 A specification. These parts are suitable for applications where the circuit design accommodates the reduced current capacity.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: STPS20H100CT

The STPS20H100CT from STMicroelectronics is the optimal substitute for the MA3D761. This component maintains electrical equivalence across all critical parameters: 1 Pair Common Cathode configuration, Schottky technology, 10 A average rectified current per diode, and TO-220-3 through-hole packaging. The STPS20H100CT provides a 100 V reverse voltage rating, which exceeds the original 90 V specification, ensuring compatibility with the original design envelope. The device is classified as Active product status with ROHS3 compliance and REACH Unaffected designation, providing long-term availability and regulatory compliance. Inventory availability of 195,950 units supports production continuity.

Secondary Substitutes: STPS10H100CFP and RB085T-90

The STPS10H100CFP and RB085T-90 are suitable substitutes for applications where the circuit design accommodates a reduced current rating of 5 A per diode. The STPS10H100CFP provides a 100 V reverse voltage rating with ROHS3 compliance and Active product status. The RB085T-90 maintains the original 90 V reverse voltage specification with ROHS3 compliance and Active product status. Both devices are compatible with the original TO-220-3 packaging and Schottky technology platform. Current rating reduction must be verified against circuit requirements prior to implementation.

Tertiary Substitute: MBRF10H150CTG

The MBRF10H150CTG from onsemi is suitable for applications requiring enhanced voltage margin. This component provides a 150 V reverse voltage rating with 5 A current per diode, 1 Pair Common Cathode configuration, and TO-220-3 Full Pack packaging. The device is classified as Active product status with ROHS3 compliance. The reduced current rating of 5 A requires circuit design verification. Inventory availability of 1,805 units supports component sourcing.

Frequently Asked Questions (FAQ)

Q: Can the STPS20H100CT directly replace the MA3D761 without circuit modification?

A: Yes. The STPS20H100CT maintains electrical equivalence across all critical parameters: 10 A average rectified current per diode, 1 Pair Common Cathode configuration, Schottky technology, and TO-220-3 through-hole packaging. The 100 V reverse voltage rating exceeds the original 90 V specification, ensuring compatibility within the original design envelope.

Q: What is the impact of using a 5 A rated substitute in place of the 10 A rated MA3D761?

A: Substitutes with 5 A current ratings (STPS10H100CFP, RB085T-90, MBRF10H150CTG) are suitable only for applications where the circuit design accommodates the reduced current capacity. The maximum current per diode is limited to 5 A with these components. Circuit analysis must confirm that operating currents remain within this reduced specification.

Q: Are all substitute parts compatible with the original TO-220-3 through-hole footprint?

A: Yes. All substitute components utilize TO-220-3 through-hole packaging and are mechanically compatible with the original MA3D761 footprint. Supplier device package designations (TO-220FP, TO-220FN, TO-220) represent minor packaging variations within the TO-220-3 family and do not affect PCB mounting compatibility.

Q: What is the significance of the reverse leakage current differences among substitutes?

A: Reverse leakage current values vary among substitutes due to manufacturing process differences and voltage rating variations. The MA3D761 specifies 3 mA @ 90 V, while substitutes range from 3.5 µA to 150 µA depending on voltage rating and manufacturer. Lower leakage current values indicate improved device performance characteristics. Circuit designs sensitive to leakage current should reference the specific leakage specification of the selected substitute.

Q: Why does the MBRF10H150CTG have a higher reverse voltage rating than the original part?

A: The MBRF10H150CTG is rated for 150 V reverse voltage, compared to the original 90 V specification. This higher rating provides additional voltage margin and is suitable for applications requiring enhanced overvoltage protection. The higher voltage rating does not negatively impact compatibility with the original 90 V design specification.

Q: What compliance certifications are relevant for substitute part selection?

A: All active substitute components are ROHS3 compliant and REACH Unaffected. These certifications ensure compliance with environmental and hazardous substance regulations. The original MA3D761 does not specify compliance status due to its obsolete classification. Selection of ROHS3 compliant substitutes ensures regulatory alignment with current manufacturing standards.

Q: How does the operating temperature range affect substitute selection?

A: The MA3D761 specifies an operating temperature range of -40°C to 125°C. All substitute components support this range or exceed it. The STPS20H100CT and STPS10H100CFP support maximum junction temperatures of 175°C, providing enhanced thermal margin. The RB085T-90 supports 150°C maximum, and the MBRF10H150CTG supports -20°C to 150°C. All substitutes are compatible with the original temperature specification.

Q: Is forward voltage drop a critical parameter for substitute selection?

A: Forward voltage drop differences exist among substitutes due to manufacturing process variations and current rating differences. The MA3D761 specifies 850 mV @ 5 A, while substitutes range from 730 mV to 850 mV at their respective rated currents. Forward voltage drop affects power dissipation and thermal performance. Circuit designs with tight thermal budgets should reference the specific forward voltage specification of the selected substitute.