MA3D799 Equivalent & Substitute Parts

Part Overview

The MA3D799 is a Schottky diode array manufactured by Panasonic Electronic Components, configured as a 1 Pair Common Cathode arrangement in a TO-220-3 Full Pack through-hole package. This component is rated for 30 V DC reverse voltage with 10 A average rectified current per diode and features fast recovery characteristics suitable for high-frequency switching applications.

The MA3D799 carries an Obsolete product status, indicating that Panasonic has discontinued this component. Identification of equivalent and substitute parts is necessary to maintain design continuity, support existing production requirements, and ensure component availability for repair, maintenance, and legacy system support.

Substiute Parts

MA3D799

Panasonic Electronic ComponentsIn Stock: 1048MA3D799 Datasheet

Current PartRFQ

RSX1001T3

Rohm SemiconductorIn Stock: 1058RSX1001T3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MA3D799 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Diode configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage rating: 30 V DC reverse (Vr)
• Package type: TO-220-3 Full Pack through-hole
• Mounting type: Through Hole

Allowable Variation Parameters:

• Current rating: The substitute may operate at equal or lower average rectified current (Io) per diode, provided the application does not exceed the substitute's rated current
• Forward voltage (Vf): Minor variations are acceptable within the same technology class and voltage rating
• Reverse leakage current: Variations are acceptable provided the substitute meets or exceeds the performance of the original part
• Operating temperature range: The substitute may have a different maximum junction temperature, provided it covers the application's operating range

The RSX1001T3 from Rohm Semiconductor meets all critical matching parameters and qualifies as a direct substitute for the MA3D799, with the exception that its current rating is 5 A per diode compared to the MA3D799's 10 A per diode. This substitution is valid only for applications where the circuit current requirement does not exceed 5 A per diode.

Parameter Comparison

Engineering Selection Recommendations

MA3D799 (Panasonic) — Primary Part: The MA3D799 is classified as Obsolete, indicating end-of-life status with no further manufacturing or support from Panasonic. This part should not be selected for new designs. Existing inventory of 973 pieces is available for legacy system support and repair applications only.

RSX1001T3 (Rohm Semiconductor) — Substitute Part: The RSX1001T3 is classified as Not For New Designs, indicating that Rohm has discontinued active promotion and support for this component. However, it remains available with 1,038 pieces in stock and qualifies as a functional substitute for the MA3D799 in applications where the circuit current requirement does not exceed 5 A per diode.

Substitution Validity: The RSX1001T3 is electrically and mechanically compatible with the MA3D799 for applications operating at or below 5 A per diode. Both components share identical voltage ratings (30 V), diode configuration (1 Pair Common Cathode), technology (Schottky), package type (TO-220-3 Full Pack), and fast recovery characteristics. The RSX1001T3 exhibits superior performance in forward voltage drop (450 mV versus 470 mV at 5 A) and reverse leakage current (500 µA versus 3 mA at 30 V), and supports a higher maximum junction temperature (150°C versus 125°C).

Compliance Considerations: Both the MA3D799 and RSX1001T3 carry ECCN classification EAR99 and HTSUS code 8541.10.0080. The RSX1001T3 is RoHS3 Compliant and REACH Unaffected. Compliance requirements for the specific application must be evaluated independently.

Frequently Asked Questions (FAQ)

Q: Can the RSX1001T3 directly replace the MA3D799 in all applications?

A: The RSX1001T3 is a direct mechanical and electrical substitute for the MA3D799 only in applications where the circuit current requirement does not exceed 5 A per diode. The MA3D799 is rated for 10 A per diode, while the RSX1001T3 is rated for 5 A per diode. If the application requires current above 5 A per diode, the RSX1001T3 cannot be used as a substitute.

Q: Are the TO-220-3 Full Pack packages identical between the MA3D799 and RSX1001T3?

A: Both components use the TO-220-3 Full Pack through-hole package. The physical dimensions, pin configuration, and mounting characteristics are compatible. The supplier device packages differ (TO-220D-A1 for MA3D799 and TO-220FN for RSX1001T3), but both conform to the TO-220-3 Full Pack standard.

Q: What is the difference in forward voltage drop between these parts?

A: The MA3D799 has a maximum forward voltage of 470 mV at 5 A, while the RSX1001T3 has a maximum forward voltage of 450 mV at 5 A. The RSX1001T3 exhibits lower forward voltage drop, which may result in reduced power dissipation in the application circuit.

Q: Why is the reverse leakage current different between the two parts?

A: The MA3D799 specifies 3 mA reverse leakage at 30 V, while the RSX1001T3 specifies 500 µA reverse leakage at 30 V. The RSX1001T3 exhibits significantly lower reverse leakage current, which is a performance advantage in applications sensitive to leakage effects.

Q: Can I use the RSX1001T3 in a circuit designed for 10 A operation?

A: No. The RSX1001T3 is rated for a maximum of 5 A average rectified current per diode. Using it in a circuit requiring 10 A per diode will exceed the component's rated current and result in component failure or degraded performance.

Q: What is the difference in operating temperature range?

A: The MA3D799 operates from −40°C to 125°C junction temperature, while the RSX1001T3 operates to a maximum junction temperature of 150°C. The RSX1001T3 supports higher temperature operation, which may be advantageous in thermally demanding applications.

Q: Are both parts suitable for new designs?

A: No. Both the MA3D799 (Obsolete) and RSX1001T3 (Not For New Designs) are discontinued components. Neither part should be selected for new design work. These substitution guidelines apply only to legacy system support, repair, and maintenance applications.

Q: What compliance certifications apply to the RSX1001T3?

A: The RSX1001T3 is RoHS3 Compliant and REACH Unaffected. Both components carry ECCN classification EAR99 and HTSUS code 8541.10.0080. Specific compliance requirements for your application must be evaluated independently.