S2MA Equivalent & Substitute Parts

Part Overview

The S2MA is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 1000 V DC reverse voltage and 1.5 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and complies with RoHS3 and REACH requirements. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or specific application requirements within the same package family.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 1.5	V @ A
Speed Classification	Standard Recovery >500ns	-
Reverse Recovery Time (trr)	1.5	µs
Current - Reverse Leakage @ Vr	5	µA @ 1000 V
Capacitance @ Vr, F	30	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the S2MA is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal 1000 V
Package / Case: Must be DO-214AC (SMA) or compatible surface mount package
Mounting Type: Must be Surface Mount
RoHS Status: Must be ROHS3 Compliant
Operating Temperature Range: Must support -55°C to 150°C junction temperature

Secondary Compatibility Factors:

Current - Average Rectified (Io): Substitute parts rated at 1 A or higher are acceptable for applications not requiring the full 1.5 A capacity
Voltage - Forward (Vf): Acceptable range 1.0 V to 1.7 V @ rated current
Speed Classification: Both Standard Recovery (>500ns) and Fast Recovery (≤500ns) types are functionally compatible
Reverse Recovery Time (trr): Acceptable range 75 ns to 3 µs
Current - Reverse Leakage: Acceptable range 5 µA to 10 µA @ 1000 V

Substitute parts with reduced current ratings (1 A versus 1.5 A) are listed because they meet all voltage, package, and thermal requirements and function within the same application envelope when current demand does not exceed their rating. Parts with different package types (SMB versus SMA) are included to address mechanical layout flexibility while maintaining electrical equivalence.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io A	Vf (Max) V @ If A	Speed	trr µs	Ir @ Vr µA	Package	Temp Range °C
S2MA	Taiwan Semiconductor Corporation	1000	1.5	1.1 @ 1.5	Standard >500ns	1.5	5 @ 1000	DO-214AC (SMA)	-55 to 150
CGRA4007-G	Comchip Technology	1000	1	1.1 @ 1	Standard >500ns	-	5 @ 1000	DO-214AC (SMA)	-55 to 150
CURA107-G	Comchip Technology	1000	1	1.7 @ 1	Fast ≤500ns	0.075	5 @ 1000	DO-214AC (SMA)	-55 to 150
GS1M-LTP	Micro Commercial Co	1000	1	1.0 @ 1	Standard >500ns	-	10 @ 1000	DO-214AC (SMA)	-55 to 150
GS2M-LTP	Micro Commercial Co	1000	2	1.1 @ 2	Standard >500ns	-	5 @ 1000	DO-214AC (SMA)	-55 to 150
RS1M-13-F	Diodes Incorporated	1000	1	1.3 @ 1	Fast ≤500ns	0.5	5 @ 1000	DO-214AC (SMA)	-65 to 150
RS1MB-13-F	Diodes Incorporated	1000	1	1.3 @ 1	Fast ≤500ns	0.5	5 @ 1000	DO-214AA (SMB)	-65 to 150
S1M-13-F	Diodes Incorporated	1000	1	1.1 @ 1	Standard >500ns	3	5 @ 1000	DO-214AC (SMA)	-65 to 150
S1M-M3/5AT	Vishay General Semiconductor - Diodes Division	1000	1	1.1 @ 1	Standard >500ns	1.8	5 @ 1000	DO-214AC (SMA)	-55 to 150
S1MB-13-F	Diodes Incorporated	1000	1	1.1 @ 1	Standard >500ns	3	5 @ 1000	DO-214AA (SMB)	-65 to 150
S1MHE3_A/H	Vishay General Semiconductor - Diodes Division	1000	1	1.1 @ 1	Standard >500ns	1.8	5 @ 1000	DO-214AC (SMA)	-55 to 150

Engineering Selection Recommendations

Direct Equivalents (Same Current Rating): GS2M-LTP is the only substitute with a 2 A current rating, exceeding the S2MA specification. This part provides enhanced current capacity while maintaining identical voltage, package, and thermal specifications. Selection is appropriate for applications requiring margin above the 1.5 A nominal rating.

Reduced Current Substitutes (1 A Rating): CGRA4007-G, CURA107-G, GS1M-LTP, RS1M-13-F, S1M-13-F, S1M-M3/5AT, and S1MHE3_A/H all carry 1 A current ratings. These parts are functionally equivalent for applications where the load current does not exceed 1 A. All maintain the 1000 V reverse voltage specification and DO-214AC (SMA) package compatibility. All are ROHS3 compliant with MSL 1 rating.

Package Variants: RS1MB-13-F and S1MB-13-F are rated for 1 A and packaged in DO-214AA (SMB) format instead of DO-214AC (SMA). These parts are electrically equivalent but require different PCB footprints and land patterns. Selection depends on mechanical layout requirements.

Recovery Speed Considerations: CURA107-G and RS1M-13-F feature fast recovery characteristics (≤500ns, trr 75 ns and 500 ns respectively) compared to the S2MA standard recovery (>500ns, trr 1.5 µs). Fast recovery types are suitable for high-frequency switching applications but are not required for standard rectification duty.

Automotive Grade Option: S1MHE3_A/H carries AEC-Q100 automotive qualification and is suitable for automotive applications requiring this certification. All other substitutes are industrial grade.

Temperature Range Extension: RS1M-13-F, RS1MB-13-F, S1M-13-F, and S1MB-13-F support -65°C to 150°C junction temperature, extending the lower operating limit by 10°C compared to the S2MA specification of -55°C to 150°C.

Frequently Asked Questions (FAQ)

Q: Can I use a 1 A rated diode in place of the S2MA 1.5 A diode?

A: Yes, provided the application circuit does not require current exceeding 1 A. The 1 A substitutes (CGRA4007-G, GS1M-LTP, S1M-13-F, S1M-M3/5AT, S1MHE3_A/H, RS1M-13-F) maintain all voltage, package, and thermal specifications. Current rating selection depends on actual load requirements, not nominal part rating.

Q: What is the difference between Standard Recovery and Fast Recovery diodes?

A: Recovery speed refers to the reverse recovery time (trr). Standard recovery diodes (S2MA, CGRA4007-G, GS1M-LTP, S1M-13-F, S1M-M3/5AT, S1MHE3_A/H) have trr >500ns or 1.5-3 µs. Fast recovery diodes (CURA107-G, RS1M-13-F) have trr ≤500ns or 75-500 ns. Fast recovery types are used in high-frequency switching circuits; standard recovery types are suitable for line-frequency rectification and general-purpose applications.

Q: Are SMA and SMB packages interchangeable?

A: No. SMA (DO-214AC) and SMB (DO-214AA) are different physical packages with different PCB footprints and land patterns. RS1MB-13-F and S1MB-13-F are SMB variants. Selection between SMA and SMB depends on available PCB space and design layout. Electrical performance is equivalent within each package type.

Q: Does the S2MA have automotive qualification?

A: The S2MA is industrial grade. S1MHE3_A/H is the automotive-qualified equivalent, carrying AEC-Q100 certification. Selection of the automotive variant is required for automotive applications with this qualification requirement.

Q: What does RoHS3 compliance mean?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the component does not contain restricted substances including lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers. All listed substitutes are RoHS3 compliant.

Q: Can I substitute a higher current rated diode (2 A) for the S2MA?

A: Yes. GS2M-LTP is rated for 2 A and maintains all other specifications of the S2MA. Higher current rating provides design margin and does not degrade performance in applications requiring 1.5 A or less.

Q: What is the significance of Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture control requirements. All listed substitutes carry MSL 1 rating, meaning they do not require special moisture-controlled storage or handling procedures.

Q: How do I determine which substitute is appropriate for my application?

A: Verify three parameters: (1) Required reverse voltage must not exceed 1000 V; (2) Required average rectified current must not exceed the substitute part rating (1 A, 1.5 A, or 2 A); (3) PCB layout must accommodate the selected package type (SMA or SMB). All listed substitutes meet these criteria within their respective ratings.

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