MA3D752A Equivalent & Substitute Parts

Part Overview

The MA3D752A 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 45 V and average rectified current of 20 A per diode. The device is packaged in a TO-220-3 Full Pack through-hole configuration and features fast recovery characteristics suitable for switching applications.

The MA3D752A is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and legacy system requirements where this component is specified in existing designs.

Key Parameters

Parameter	Value
Diode Configuration	1 Pair Common Cathode
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V
Current - Average Rectified (Io) (per Diode)	20 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 10 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	5 mA @ 45 V
Operating Temperature - Junction	-40°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-220-3 Full Pack
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MA3D752A are selected based on strict electrical and mechanical compatibility criteria. The following parameters must align with the main part specifications to establish a valid substitution relationship:

Critical Matching Parameters:

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 45 V minimum
Mounting Type: Through Hole
Package / Case: TO-220-3 compatible

Allowable Variation Parameters:

Current - Average Rectified (Io): Substitute parts may have equal or greater current rating
Voltage - Forward (Vf): Substitute parts may have equal or lower forward voltage
Current - Reverse Leakage: Substitute parts may have equal or lower leakage current
Operating Temperature Range: Substitute parts may have equal or wider temperature range

The identified substitute parts meet these criteria and are therefore electrically and mechanically compatible with the MA3D752A in applications where the specified parameters are required.

Parameter Comparison

Parameter	MA3D752A (Panasonic)	MBR20L45CTG (onsemi)	RB215T-40 (Rohm)
Diode Configuration	1 Pair Common Cathode	1 Pair Common Cathode	1 Pair Common Cathode
Technology	Schottky	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	45 V	45 V	40 V
Current - Average Rectified (Io) (per Diode)	20 A	10 A	10 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 10 A	500 mV @ 10 A	550 mV @ 10 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	5 mA @ 45 V	500 µA @ 45 V	500 µA @ 40 V
Operating Temperature - Junction	-40°C ~ 125°C	-55°C ~ 150°C	150°C (Max)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Full Pack	TO-220-3	TO-220-3 Full Pack
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Obsolete	Active

Engineering Selection Recommendations

MBR20L45CTG (onsemi): This substitute maintains the 45 V reverse voltage rating and provides equivalent fast recovery characteristics. The part is classified as obsolete, matching the status of the MA3D752A. Current rating is reduced to 10 A per diode, which represents a design constraint for applications requiring the full 20 A capability of the original part. Forward voltage is improved at 500 mV versus 550 mV. Operating temperature range is extended to -55°C ~ 150°C. RoHS3 compliance is confirmed.

RB215T-40 (Rohm Semiconductor): This substitute is classified as active product status, providing ongoing availability and supply chain continuity. The reverse voltage rating is reduced to 40 V, which limits application to circuits with maximum operating voltages below 40 V. Current rating is 10 A per diode. Forward voltage matches the original specification at 550 mV. The part is RoHS3 compliant and REACH unaffected. This option is suitable for applications where the 40 V rating is acceptable and active product support is required.

Frequently Asked Questions (FAQ)

Q: Can the MBR20L45CTG be used as a direct replacement for the MA3D752A?

A: The MBR20L45CTG is electrically compatible in terms of voltage rating, diode configuration, and package type. However, the current rating is reduced from 20 A to 10 A per diode. This substitute is suitable only for applications where the circuit current does not exceed 10 A per diode.

Q: What is the primary limitation of the RB215T-40 as a substitute?

A: The RB215T-40 has a maximum reverse voltage rating of 40 V compared to the 45 V rating of the MA3D752A. This part is suitable only for applications where the maximum reverse voltage does not exceed 40 V. Additionally, the current rating is 10 A per diode versus 20 A for the original part.

Q: Are both substitute parts available in the same package as the MA3D752A?

A: Both substitute parts are packaged in TO-220-3 through-hole configurations compatible with the original TO-220-3 Full Pack footprint. Physical mounting and lead configuration are compatible.

Q: What is the difference in reverse leakage current between the main part and substitutes?

A: The MA3D752A specifies 5 mA reverse leakage at 45 V. Both substitute parts specify 500 µA at their respective voltage ratings, representing a 10-fold reduction in leakage current. This improvement may benefit low-power or precision applications.

Q: Which substitute part offers the best long-term availability?

A: The RB215T-40 from Rohm Semiconductor is classified as active product status, indicating ongoing manufacturing and supply chain support. The MBR20L45CTG is classified as obsolete, similar to the MA3D752A.

Q: Are there temperature range considerations when selecting a substitute?

A: The MA3D752A operates from -40°C to 125°C. The MBR20L45CTG extends this range to -55°C to 150°C, providing wider temperature capability. The RB215T-40 specifies a maximum junction temperature of 150°C. Selection depends on the specific thermal requirements of the application.

Q: Do the substitute parts have the same moisture sensitivity rating?

A: Yes, all three parts, including the MA3D752A and both substitutes, are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.

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