RS1A M2G Equivalent & Substitute Parts

Part Overview

The RS1A M2G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer functional compatibility within defined parameter tolerances for this diode category.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Capacitance @ Vr, F	10	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 RS1A M2G is determined by the following critical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 1 A
Reverse Recovery Time (trr): ≤ 150 ns (fast recovery classification)
Current - Reverse Leakage @ Vr: 5 µA @ 50 V

Mechanical Compatibility Criteria:

Package / Case: DO-214AC (SMA)
Mounting Type: Surface Mount

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parts are grouped into three categories:

Parametric Equivalents: Parts with identical electrical specifications and fast recovery characteristics (trr ≤ 150 ns), including RS1A (active, Tape & Reel packaging) and RS1AH (active, automotive-qualified variant).

Direct Manufacturer Equivalents: Parts from alternative manufacturers (Comchip Technology CFRA101-G) meeting all electrical and mechanical specifications with fast recovery performance.

Similar Functional Substitutes: Parts with compatible electrical ratings and fast recovery characteristics but with variations in forward voltage (Vf) or reverse recovery time (trr), including Diodes Incorporated ES1A-13-F and Vishay General Semiconductor ES1A series variants. These parts maintain the 50 V / 1 A rating and fast recovery speed classification.

Standard Recovery Alternative: Comchip Technology CGRA4001-G offers standard recovery performance (>500ns) with lower forward voltage (1.1 V @ 1 A), suitable for applications where recovery speed is not critical.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr	Ir @ Vr	Package	Product Status	Grade
RS1A M2G	Taiwan Semiconductor Corporation	50 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 50 V	DO-214AC (SMA)	Discontinued	Standard
RS1A	Taiwan Semiconductor Corporation	50 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Standard
RS1AH	Taiwan Semiconductor Corporation	50 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Automotive (AEC-Q101)
CFRA101-G	Comchip Technology	50 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Standard
CGRA4001-G	Comchip Technology	50 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	—	5 µA @ 50 V	DO-214AC (SMA)	Active	Standard
ES1A-13-F	Diodes Incorporated	50 V	1 A	920 mV @ 1 A	Fast Recovery ≤ 500ns	25 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Standard
ES1A-E3/5AT	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast Recovery ≤ 500ns	25 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Standard
ES1A-M3/5AT	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast Recovery ≤ 500ns	25 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Standard
ES1A-M3/61T	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast Recovery ≤ 500ns	25 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Standard
ES1AHE3_A/H	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast Recovery ≤ 500ns	25 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Automotive (AEC-Q101)
ES1AHE3_A/I	Vishay General Semiconductor - Diodes Division	50 V	1 A	920 mV @ 1 A	Fast Recovery ≤ 500ns	25 ns	5 µA @ 50 V	DO-214AC (SMA)	Active	Automotive (AEC-Q101)

Engineering Selection Recommendations

Primary Recommendation - Parametric Equivalent: RS1A (Taiwan Semiconductor Corporation) is the direct parametric equivalent to RS1A M2G, offering identical electrical specifications and fast recovery characteristics. This part is active and available in Tape & Reel packaging with 22,800 pieces in stock, providing the most direct replacement path.

Automotive-Grade Alternative: RS1AH (Taiwan Semiconductor Corporation) provides identical electrical performance to the RS1A M2G with automotive qualification (AEC-Q101). This variant is suitable for applications requiring automotive-grade components and is currently active with 663 pieces in stock.

Alternative Manufacturer - Fast Recovery: CFRA101-G (Comchip Technology) meets all electrical and mechanical specifications with fast recovery performance (150 ns trr). This part is active with 1,052 pieces in stock and provides cross-manufacturer compatibility.

Vishay General Semiconductor Series - Enhanced Performance: ES1A-M3/61T, ES1A-M3/5AT, ES1A-E3/5AT, and ES1A-13-F (Diodes Incorporated) offer superior fast recovery characteristics (25 ns trr) with lower forward voltage (920 mV @ 1 A) compared to the RS1A M2G (1.3 V @ 1 A). These parts are active with substantial inventory availability (12,650 to 70,300 pieces) and are suitable for applications where reduced forward voltage drop is beneficial.

Automotive-Grade Enhanced Performance: ES1AHE3_A/H and ES1AHE3_A/I (Vishay General Semiconductor - Diodes Division) combine automotive qualification (AEC-Q101) with enhanced fast recovery performance (25 ns trr) and lower forward voltage (920 mV @ 1 A). These variants are active with 4,145 and 894 pieces in stock respectively.

Standard Recovery Alternative: CGRA4001-G (Comchip Technology) offers standard recovery performance (>500ns) with lower forward voltage (1.1 V @ 1 A). This part is suitable for applications where recovery speed is not critical and is available with 10,226 pieces in stock.

All recommended substitutes maintain ROHS3 compliance, MSL 1 (Unlimited) rating, and DO-214AC (SMA) package compatibility with the original RS1A M2G specification.

Frequently Asked Questions (FAQ)

Q: Can RS1A be used as a direct replacement for RS1A M2G? A: Yes. RS1A is the parametric equivalent with identical electrical specifications (50 V, 1 A, 1.3 V Vf @ 1 A, 150 ns trr) and DO-214AC (SMA) package. The primary difference is product status: RS1A M2G is discontinued while RS1A is active.

Q: What is the difference between RS1A and RS1AH? A: Both parts have identical electrical specifications. RS1AH includes automotive qualification (AEC-Q101) and is designated as automotive-grade, making it suitable for automotive applications requiring this certification. RS1A is standard-grade.

Q: Can I use ES1A-M3/61T instead of RS1A M2G? A: Yes. ES1A-M3/61T is functionally compatible with identical voltage and current ratings (50 V, 1 A), fast recovery performance (≤ 500ns), and DO-214AC (SMA) package. The ES1A-M3/61T offers superior reverse recovery time (25 ns versus 150 ns) and lower forward voltage (920 mV versus 1.3 V @ 1 A), which may improve circuit efficiency.

Q: What is the significance of reverse recovery time (trr)? A: Reverse recovery time determines how quickly the diode transitions from conducting to blocking state. The RS1A M2G has 150 ns trr (fast recovery classification). Substitutes with lower trr values (such as ES1A series at 25 ns) provide faster switching and reduced switching losses, beneficial in high-frequency applications.

Q: Are all substitute parts in the same package? A: Yes. All listed substitute parts use the DO-214AC (SMA) surface mount package, ensuring mechanical and PCB layout compatibility with the RS1A M2G.

Q: What does ROHS3 compliance mean? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials including lead, mercury, cadmium, and hexavalent chromium. All listed substitutes maintain ROHS3 compliance.

Q: Can I use CGRA4001-G as a substitute? A: CGRA4001-G is functionally compatible for voltage and current ratings (50 V, 1 A) and package (DO-214AC, SMA). However, it uses standard recovery performance (>500ns) rather than fast recovery (≤ 500ns). This substitution is suitable only for applications where recovery speed is not critical.

Q: What is the difference between Tape & Reel and Cut Tape packaging? A: Tape & Reel (TR) packaging provides components on continuous tape suitable for automated pick-and-place assembly. Cut Tape (CT) provides components on cut segments of tape. Both are surface mount compatible; the choice depends on assembly equipment and volume requirements.

Q: Are automotive-grade variants (RS1AH, ES1AHE3_A/H, ES1AHE3_A/I) required for all applications? A: Automotive-grade variants with AEC-Q101 qualification are required only for automotive applications or systems requiring automotive-level reliability standards. Standard-grade parts are suitable for general industrial and consumer applications.

Q: What is the operating temperature range for these diodes? A: The RS1A M2G and most substitutes operate from -55°C to 150°C junction temperature. ES1A-E3/5AT extends to -55°C to 155°C. Verify application requirements against the specific part's temperature range.

Q: How do I select between multiple substitute options? A: Selection depends on application requirements: (1) For direct replacement, use RS1A; (2) For automotive applications, use RS1AH or ES1AHE3 variants; (3) For improved efficiency (lower Vf and faster trr), use ES1A series; (4) For cost optimization with standard recovery, use CGRA4001-G.

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