MA2SD2900L Equivalent & Substitute Parts

Part Overview

The MA2SD2900L is a Schottky diode manufactured by Panasonic Electronic Components, rated for 30 V DC reverse voltage and 100 mA average rectified current in a surface mount SSMini2-F1 package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The MA2SD2900L operates as a small signal Schottky rectifier with a maximum forward voltage of 420 mV at 100 mA and a reverse recovery time of 1 ns. The part is suitable for applications requiring fast switching and low forward voltage drop characteristics typical of Schottky diode technology.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	100	mA
Voltage - Forward (Vf) (Max) @ If	420 mV @ 100 mA	mV
Reverse Recovery Time (trr)	1	ns
Current - Reverse Leakage @ Vr	120 µA @ 30 V	µA
Capacitance @ Vr, F	11 pF @ 0V, 1MHz	pF
Technology	Schottky	—
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523	—
Operating Temperature - Junction (Max)	125	°C
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MA2SD2900L is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V
Technology: Schottky
Mounting Type: Surface Mount
Package / Case: SC-79, SOD-523

Functional Compatibility Parameters:

Current - Average Rectified (Io): Equal to or greater than 100 mA
Speed Classification: Small Signal ≤ 200 mA (Io), Any Speed
Forward voltage characteristics within acceptable operating range

Substitute parts are grouped into two categories based on current rating:

Category A - Direct Current Rating Match (100 mA): Parts with 100 mA average rectified current provide direct functional equivalence with identical current handling capacity.

Category B - Higher Current Rating (200 mA): Parts with 200 mA average rectified current exceed the original specification and are suitable for applications where the MA2SD2900L is used, provided circuit design accommodates the different forward voltage characteristics.

Category C - Lower Current Rating (30 mA): Parts with 30 mA average rectified current are restricted to applications where the circuit current demand does not exceed this limit.

All substitute parts maintain the 30 V reverse voltage rating, Schottky technology, and surface mount configuration required for direct replacement in the same PCB footprint.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [mA]	Vf (Max) [mV]	Vf Test Condition	Reverse Leakage [µA]	Leakage Test Condition	Package	Product Status	Temperature (Max) [°C]
MA2SD2900L	Panasonic	30	100	420	@ 100 mA	120	@ 30 V	SOD-523	Obsolete	125
1PS79SB10,115	Nexperia USA Inc.	30	200	800	@ 100 mA	2	@ 25 V	SOD-523	Active	125
RB500SM-30FHT2R	Rohm Semiconductor	30	100	450	@ 10 mA	0.5	@ 10 V	SOD-523	Active	150
RB501SM-30FHT2R	Rohm Semiconductor	30	100	350	@ 10 mA	10	@ 10 V	SOD-523	Active	125
RB520S30T1G	onsemi	30	200	600	@ 200 mA	1	@ 10 V	SOD-523	Active	150
RB521S30T1G	onsemi	30	200	500	@ 200 mA	30	@ 10 V	SOD-523	Active	125
RB530SM-30T2R	Rohm Semiconductor	30	200	450	@ 10 mA	0.5	@ 10 V	SOD-523	Active	150
RB751S40T5G	onsemi	30	30	370	@ 1 mA	0.5	@ 30 V	SOD-523	Active	150
SBAT54XV2T1G	onsemi	30	200	800	@ 100 mA	2	@ 25 V	SOD-523	Active	125

Engineering Selection Recommendations

Primary Substitutes (100 mA Current Rating):

RB501SM-30FHT2R and RB500SM-30FHT2R from Rohm Semiconductor are direct current-rated equivalents to the MA2SD2900L. Both parts maintain the 30 V reverse voltage specification and 100 mA average rectified current. RB501SM-30FHT2R offers superior forward voltage characteristics at 350 mV (@ 10 mA) compared to the original 420 mV specification. Both Rohm parts carry AEC-Q101 automotive qualification and operate at maximum junction temperatures of 150°C and 125°C respectively, exceeding the original part's 125°C rating. These parts are active products with established supply availability.

Secondary Substitutes (200 mA Current Rating):

RB520S30T1G, RB521S30T1G, RB530SM-30T2R, 1PS79SB10,115, and SBAT54XV2T1G are rated for 200 mA average rectified current, exceeding the original specification. These parts are suitable for applications where circuit design accommodates higher current capacity. RB520S30T1G and RB530SM-30T2R provide forward voltage of 600 mV and 450 mV respectively at specified test conditions. RB521S30T1G operates at 500 mV forward voltage. 1PS79SB10,115 and SBAT54XV2T1G both specify 800 mV forward voltage at 100 mA. All 200 mA rated parts are active products with high inventory availability.

Restricted Substitute (30 mA Current Rating):

RB751S40T5G is rated for 30 mA average rectified current and is restricted to applications where circuit current demand does not exceed this limit. This part is not suitable as a general replacement for the MA2SD2900L in circuits requiring the full 100 mA capacity.

Compliance and Qualification:

Rohm Semiconductor parts (RB500SM-30FHT2R, RB501SM-30FHT2R, RB530SM-30T2R) carry AEC-Q101 automotive qualification. onsemi parts (RB520S30T1G, RB521S30T1G, RB751S40T5G, SBAT54XV2T1G) and Nexperia part (1PS79SB10,115) are active products with ROHS3 compliance and REACH unaffected status. All substitute parts are classified as active products, ensuring long-term availability and supply chain stability compared to the obsolete MA2SD2900L.

Frequently Asked Questions (FAQ)

Q: Can RB501SM-30FHT2R directly replace MA2SD2900L in all applications?

A: RB501SM-30FHT2R matches the critical parameters of the MA2SD2900L: 30 V reverse voltage, 100 mA average rectified current, Schottky technology, and SOD-523 package. The part is pin-compatible and footprint-compatible. Forward voltage is 350 mV at 10 mA test condition compared to the original 420 mV at 100 mA, representing improved performance. This part is suitable for direct replacement in circuits designed for the MA2SD2900L.

Q: What is the difference between 100 mA and 200 mA rated substitutes?

A: The MA2SD2900L is rated for 100 mA average rectified current. Substitute parts rated for 200 mA (such as RB520S30T1G, RB521S30T1G, RB530SM-30T2R, 1PS79SB10,115, and SBAT54XV2T1G) have higher current capacity. These parts are suitable for the MA2SD2900L application provided the circuit current does not exceed 100 mA. The higher rating provides design margin but does not affect compatibility at the original current specification.

Q: Why do forward voltage specifications vary between parts?

A: Forward voltage is measured at different test conditions across manufacturers. The MA2SD2900L specifies 420 mV at 100 mA. RB501SM-30FHT2R specifies 350 mV at 10 mA, and RB520S30T1G specifies 600 mV at 200 mA. These differences reflect measurement conditions rather than incompatibility. Circuit design must account for the forward voltage of the selected substitute part.

Q: Is RB751S40T5G suitable as a substitute?

A: RB751S40T5G is rated for 30 mA average rectified current, which is below the MA2SD2900L specification of 100 mA. This part is not suitable as a general replacement. It is restricted to applications where circuit current demand does not exceed 30 mA.

Q: What is the significance of AEC-Q101 qualification on Rohm parts?

A: AEC-Q101 is an automotive qualification standard for discrete semiconductors. Rohm parts carrying this qualification (RB500SM-30FHT2R, RB501SM-30FHT2R, RB530SM-30T2R) meet automotive reliability and quality requirements. This qualification is relevant for applications requiring automotive-grade components but does not affect general electronic circuit compatibility.

Q: Are all substitute parts available in the same package?

A: All substitute parts listed are available in SOD-523 package, which corresponds to the SC-79 case outline. This ensures PCB footprint compatibility with the original MA2SD2900L. Supplier device packages vary (SSMini2-F1, SOD-523, EMD2) but all parts fit the same physical footprint on the circuit board.

Q: What is the impact of different reverse leakage specifications?

A: The MA2SD2900L specifies 120 µA reverse leakage at 30 V. Substitute parts show lower reverse leakage: RB501SM-30FHT2R at 10 µA (@ 10 V), RB520S30T1G at 1 µA (@ 10 V), and RB751S40T5G at 0.5 µA (@ 30 V). Lower reverse leakage represents improved performance and does not affect circuit compatibility. Circuit design should not depend on the higher leakage of the original part.

Q: Can I use a 200 mA rated part in a circuit designed for 100 mA?

A: Yes. A 200 mA rated part can be used in a circuit designed for 100 mA operation. The higher current rating provides design margin and does not create compatibility issues. The circuit will operate at the same current level as originally designed. Forward voltage characteristics of the selected substitute must be verified for the specific application.

Q: What is the difference between Rohm EMD2 and onsemi SOD-523 packages?

A: Both EMD2 and SOD-523 are surface mount packages with the same physical footprint (SC-79 case outline). Parts in either package are PCB-compatible with the MA2SD2900L. The package designation reflects manufacturer nomenclature but does not affect electrical performance or mechanical fit.

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