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S1AHE3_A/I Equivalent & Substitute Parts
Part Overview
The S1AHE3_A/I is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as Active product status and carries AEC-Q101 automotive qualification. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring 50 V / 1 A rectification in the DO-214AC form factor.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) (Max) | 50 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) (Max) @ If | 1.1 | V @ 1 A |
| Reverse Recovery Time (trr) | 1.8 | µs |
| Current - Reverse Leakage @ Vr | 1 | µA @ 50 V |
| Capacitance @ Vr, F | 12 | pF @ 4V, 1MHz |
| Package / Case | DO-214AC, SMA | — |
| Mounting Type | Surface Mount | — |
| Operating Temperature - Junction | -55 to 150 | °C |
| Grade | Automotive | — |
| Qualification | AEC-Q101 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the S1AHE3_A/I is determined by the following critical parameters:
Mandatory Matching Parameters:
- Voltage - DC Reverse (Vr) (Max): 50 V
- Current - Average Rectified (Io): 1 A
- Package / Case: DO-214AC, SMA
- Mounting Type: Surface Mount
Allowable Variation Parameters:
- Voltage - Forward (Vf) (Max) @ If: Substitutes may vary within typical rectifier tolerances
- Reverse Recovery Time (trr): Substitutes with faster recovery (≤500 ns) are acceptable for standard recovery applications
- Current - Reverse Leakage @ Vr: Substitutes with equal or lower leakage are acceptable
- Capacitance @ Vr, F: Minor variations acceptable
- Operating Temperature - Junction: Substitutes with equal or wider temperature range are acceptable
- Product Status: Active parts are preferred; Not For New Designs parts are listed for reference only
Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications from the same manufacturer) and Manufacturer Recommended Equivalents (alternative manufacturers with compatible electrical and mechanical characteristics).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) @ If [V] | trr [µs/ns] | Ir @ Vr [µA] | Package | Temp Range [°C] | Product Status | Grade |
|---|---|---|---|---|---|---|---|---|---|---|
| S1AHE3_A/I | Vishay | 50 | 1 | 1.1 @ 1A | 1.8 µs | 1 @ 50V | DO-214AC | -55 to 150 | Active | Automotive |
| S1A-E3/5AT | Vishay | 50 | 1 | 1.1 @ 1A | 1.8 µs | 1 @ 50V | DO-214AC | -55 to 150 | Active | — |
| S1A-E3/61T | Vishay | 50 | 1 | 1.1 @ 1A | 1.8 µs | 1 @ 50V | DO-214AC | -55 to 150 | Active | — |
| S1AHE3_A/H | Vishay | 50 | 1 | 1.1 @ 1A | 1.8 µs | 1 @ 50V | DO-214AC | -55 to 150 | Active | Automotive |
| EGF1A | Fairchild Semiconductor | 50 | 1 | 1.0 @ 1A | 50 ns | 10 @ 50V | DO-214AC | -65 to 175 | Active | — |
| ES1A | YAGEO | 50 | — | 0.95 | — | — | DO-214AC | — | Active | — |
| ES1A-13-F | Diodes Incorporated | 50 | 1 | 0.92 @ 1A | 25 ns | 5 @ 50V | DO-214AC | -55 to 150 | Active | — |
| ES1A-LTP | Micro Commercial Co | 50 | 1 | 0.95 @ 1A | 35 ns | 5 @ 50V | DO-214AC | -65 to 175 | Not For New Designs | — |
| GF1A | onsemi | 50 | 1 | 1.0 @ 1A | 2 µs | 5 @ 50V | DO-214AC | -65 to 175 | Not For New Designs | — |
| RGF1A | Fairchild Semiconductor | 50 | 1 | 1.3 @ 1A | 150 ns | 5 @ 50V | DO-214AC | -65 to 175 | Active | — |
| RS1A | Taiwan Semiconductor Corporation | 50 | 1 | 1.3 @ 1A | 150 ns | 5 @ 50V | DO-214AC | -55 to 150 | Active | — |
Engineering Selection Recommendations
Parametric Equivalents (Vishay S1A Series): S1A-E3/5AT, S1A-E3/61T, and S1AHE3_A/H are direct parametric equivalents to S1AHE3_A/I. These parts share identical electrical specifications and the same DO-214AC package. S1AHE3_A/H carries the same Automotive grade and AEC-Q101 qualification as the main part. Selection among these variants is based on packaging format (Tape & Reel) and internal manufacturing codes that do not affect electrical performance.
Manufacturer Recommended Equivalents (Active Status): EGF1A (Fairchild Semiconductor), ES1A-13-F (Diodes Incorporated), RGF1A (Fairchild Semiconductor), and RS1A (Taiwan Semiconductor Corporation) are Active status parts that meet the 50 V / 1 A / DO-214AC requirements. These parts exhibit faster reverse recovery times (25 ns to 150 ns) compared to the S1AHE3_A/I (1.8 µs), making them suitable for applications where switching speed is beneficial. Forward voltage characteristics vary slightly across manufacturers but remain within acceptable rectifier operating ranges.
Not For New Designs (Legacy Status): ES1A-LTP (Micro Commercial Co) and GF1A (onsemi) are designated Not For New Designs and should be used only for replacement or maintenance of existing systems. These parts are retained in the substitute list for continuity of service but are not recommended for new circuit designs.
Compliance Considerations: All listed substitutes are RoHS3 compliant and REACH unaffected. The S1AHE3_A/I and S1AHE3_A/H carry explicit Automotive grade and AEC-Q101 qualification; applications requiring automotive qualification should prioritize these variants or confirm equivalent qualification status with alternative manufacturers.
Frequently Asked Questions (FAQ)
Q: Can I substitute S1A-E3/5AT for S1AHE3_A/I in an automotive application? A: S1A-E3/5AT is a parametric equivalent with identical electrical specifications and the same DO-214AC package. However, S1A-E3/5AT does not carry explicit Automotive grade or AEC-Q101 qualification in the provided data. For automotive applications requiring AEC-Q101 certification, use S1AHE3_A/H, which carries both Automotive grade and AEC-Q101 qualification.
Q: What is the difference between standard recovery and fast recovery diodes in this list? A: The S1AHE3_A/I is specified as Standard Recovery with a reverse recovery time (trr) of 1.8 µs. Substitute parts such as EGF1A, ES1A-13-F, RGF1A, and RS1A are specified as Fast Recovery with trr values ranging from 25 ns to 150 ns. Fast recovery diodes switch more quickly and generate less switching noise, making them suitable for higher-frequency applications. Both types are electrically compatible at the 50 V / 1 A rating and DO-214AC package level.
Q: Are all substitute parts available in Tape & Reel packaging? A: Most substitute parts are available in Tape & Reel (TR) packaging. ES1A (YAGEO) is available in Cut Tape (CT) & Digi-Reel® format, and GF1A (onsemi) is available in Cut Tape (CT) & Digi-Reel® format. Packaging format selection depends on assembly equipment compatibility and procurement requirements. Verify packaging availability with your supplier before finalizing part selection.
Q: What is the significance of the forward voltage (Vf) variation among substitutes? A: Forward voltage varies across manufacturers and technologies. The S1AHE3_A/I specifies 1.1 V @ 1 A. Substitutes range from 0.92 V (ES1A-13-F) to 1.3 V (RGF1A and RS1A). In rectifier applications, forward voltage affects power dissipation and thermal performance. Lower Vf reduces heat generation; higher Vf increases it. Select substitutes based on your circuit's thermal budget and efficiency requirements. All listed values are within typical rectifier operating ranges.
Q: Can I use ES1A-LTP or GF1A in new designs? A: ES1A-LTP and GF1A are marked Not For New Designs. These parts are retained in the substitute list for replacement and maintenance of existing systems only. For new circuit designs, select from Active status parts: S1A-E3/5AT, S1A-E3/61T, S1AHE3_A/H, EGF1A, ES1A-13-F, RGF1A, or RS1A.
Q: What is the operating temperature range difference, and does it matter? A: The S1AHE3_A/I operates from -55°C to 150°C. Some substitutes (EGF1A, ES1A-LTP, GF1A, RGF1A) extend to -65°C to 175°C. A wider temperature range provides greater design margin for extreme environmental conditions. If your application operates within -55°C to 150°C, both ranges are acceptable. For applications requiring extended low-temperature operation below -55°C or high-temperature operation above 150°C, select substitutes with the wider range.
Q: How do I verify that a substitute part is compatible with my circuit? A: Verify compatibility by confirming: (1) Voltage - DC Reverse (Vr) rating is 50 V or higher; (2) Current - Average Rectified (Io) rating is 1 A or higher; (3) Package is DO-214AC (SMA); (4) Mounting type is Surface Mount; (5) Operating temperature range covers your application's requirements; (6) For automotive applications, confirm AEC-Q101 qualification. All listed substitutes meet these criteria at the 50 V / 1 A level.
Q: What does MSL 1 (Unlimited) mean? A: Moisture Sensitivity Level (MSL) 1 (Unlimited) indicates that the component has minimal moisture sensitivity and does not require special moisture control during storage, handling, or assembly. These parts can be stored and handled under standard conditions without desiccant packaging or baking procedures prior to reflow soldering.
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