RS3A-M3/9AT Equivalent & Substitute Parts

Part Overview

The RS3A-M3/9AT is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount diode operates at 50 V DC reverse voltage with a 3 A average rectified current rating and is housed in a DO-214AB (SMC) package. The device is classified as Active product status and incorporates fast recovery technology with a reverse recovery time of 150 ns. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

RS3A-M3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 1092RS3A-M3/9AT Datasheet

Current PartRFQ

ES3A

Taiwan Semiconductor CorporationIn Stock: 17208ES3A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RS3A-M3/9AT is permissible when the alternative component meets or exceeds the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V minimum
• Current - Average Rectified (Io): 3 A minimum
• Package / Case: DO-214AB (SMC)
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Operating Temperature - Junction: -55°C to 150°C minimum range
• Technology: Standard
• RoHS Status: ROHS3 Compliant

Allowable Parameter Variations:

• Voltage - Forward (Vf) (Max) @ If: Lower values are acceptable
• Reverse Recovery Time (trr): Lower values are acceptable
• Current - Reverse Leakage @ Vr: Equal or lower values are acceptable
• Capacitance @ Vr, F: Minor variations within ±5% are acceptable

The ES3A manufactured by Taiwan Semiconductor Corporation satisfies all mandatory matching parameters and demonstrates improved performance in forward voltage drop and reverse recovery time characteristics.

Parameter Comparison

Engineering Selection Recommendations

RS3A-M3/9AT (Vishay General Semiconductor - Diodes Division)

Select this part when Vishay component qualification is required or when the specified forward voltage and reverse recovery time characteristics are design-critical. The device maintains Active product status with established supply chain presence. ROHS3 compliance and REACH Unaffected status satisfy environmental regulatory requirements. Moisture Sensitivity Level 1 (Unlimited) indicates no moisture-related handling restrictions.

ES3A (Taiwan Semiconductor Corporation)

Select this part as a direct substitute when supply availability of the RS3A-M3/9AT is constrained. The ES3A demonstrates superior electrical performance with reduced forward voltage drop (950 mV @ 3 A versus 1.3 V @ 2.5 A) and significantly faster reverse recovery time (35 ns versus 150 ns). Both devices maintain identical voltage and current ratings, package configuration, and temperature operating range. ROHS3 compliance and REACH Unaffected status are maintained. Moisture Sensitivity Level 1 (Unlimited) applies equally. The ES3A is suitable for applications where improved switching characteristics and reduced power dissipation provide design benefits.

Both parts are Active status products with full regulatory compliance and unlimited moisture sensitivity classification, enabling direct substitution in surface mount rectifier applications rated for 50 V, 3 A operation.

Frequently Asked Questions (FAQ)

Q: Can the ES3A replace the RS3A-M3/9AT in all applications?

A: Yes. Both devices share identical voltage ratings (50 V), current ratings (3 A), package configuration (DO-214AB/SMC), operating temperature range (-55°C to 150°C), and regulatory compliance (ROHS3, REACH Unaffected). The ES3A demonstrates improved performance characteristics with lower forward voltage drop and faster reverse recovery time, making it suitable for direct substitution.

Q: What are the key differences between these two diodes?

A: The primary differences are manufacturer origin and performance characteristics. The RS3A-M3/9AT is manufactured by Vishay with a forward voltage of 1.3 V @ 2.5 A and reverse recovery time of 150 ns. The ES3A is manufactured by Taiwan Semiconductor Corporation with a forward voltage of 950 mV @ 3 A and reverse recovery time of 35 ns. Both meet the same electrical specifications for voltage and current ratings.

Q: Are there any package or mounting differences?

A: No. Both the RS3A-M3/9AT and ES3A use the DO-214AB (SMC) surface mount package. Mechanical compatibility and PCB footprint requirements are identical.

Q: Do both parts have the same moisture sensitivity classification?

A: Yes. Both devices are classified as Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling or storage restrictions apply to either component.

Q: Which part should be selected for new designs?

A: Selection depends on design requirements and supply chain strategy. The ES3A offers superior switching performance with reduced reverse recovery time and lower forward voltage drop, which may reduce power dissipation in high-frequency switching applications. The RS3A-M3/9AT is appropriate when Vishay component qualification is specified or when established supplier relationships are preferred.

Q: Are both parts RoHS compliant?

A: Yes. Both the RS3A-M3/9AT and ES3A are ROHS3 Compliant and REACH Unaffected, satisfying environmental regulatory requirements for electronic component manufacturing and use.

Q: What is the significance of the reverse recovery time difference?

A: The ES3A reverse recovery time of 35 ns is significantly faster than the RS3A-M3/9AT at 150 ns. Faster reverse recovery reduces switching losses and improves efficiency in high-frequency rectification circuits. This characteristic makes the ES3A advantageous in applications where switching speed is performance-critical.