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SMAJ10A-E3/5A Equivalent & Substitute Parts
Part Overview
The SMAJ10A-E3/5A is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates with a 10V reverse standoff voltage and provides 17V maximum clamping voltage at peak pulse current of 23.5A. The device is designed for general-purpose transient protection applications and is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Equivalent and substitute parts are identified based on matching electrical performance parameters: reverse standoff voltage (10V), breakdown voltage range (11.1V minimum), clamping voltage characteristics, peak pulse current capability, and surface mount packaging compatibility.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 10 | V |
| Voltage - Breakdown (Min) | 11.1 | V |
| Voltage - Clamping (Max) @ Ipp | 17 | V |
| Current - Peak Pulse (10/1000µs) | 23.5 | A |
| Power - Peak Pulse | 400 | W |
| Operating Temperature Range | -55 to 150 | °C |
| Mounting Type | Surface Mount | - |
| Package / Case | DO-214AC, SMA | - |
| RoHS Status | ROHS3 Compliant | - |
| MSL Rating | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitute parts for the SMAJ10A-E3/5A are classified into two functional groups based on electrical parameter compatibility:
Group 1: Direct Electrical Equivalents Parts matching all critical electrical parameters: 10V reverse standoff voltage, 11.1V minimum breakdown voltage, 17V clamping voltage, and 23.5A peak pulse current (10/1000µs pulse definition). These parts maintain identical transient suppression characteristics and are interchangeable in applications where the specified pulse waveform applies.
- SMAJ10A-13-F (Diodes Incorporated)
- SMAJ10A-TP (Micro Commercial Co)
- SMAJ10A (MDD)
Group 2: Alternate Pulse Definition Equivalents Parts with matching 10V reverse standoff and 11.1V breakdown voltage but different clamping voltage and peak pulse current specifications due to alternative pulse waveform definitions (8/20µs). These parts provide equivalent transient protection but with different energy handling characteristics under the specified pulse conditions.
- SM4T12AY (STMicroelectronics) - 21.7V clamp, 106A (8/20µs)
- SMA6J10A-TR (STMicroelectronics) - 19.6V clamp, 184A (8/20µs)
Group 3: Automotive-Qualified Alternatives Parts meeting automotive qualification standards (AEC-Q101) with equivalent electrical performance.
- PTVS10VS1UR,115 (Nexperia USA Inc.) - SOD-123W package, automotive grade
Parameter Comparison
| Part Number | Manufacturer | Reverse Standoff (V) | Breakdown Min (V) | Clamping Max @ Ipp (V) | Peak Pulse Current | Power Peak Pulse (W) | Package | Temp Range (°C) | RoHS |
|---|---|---|---|---|---|---|---|---|---|
| SMAJ10A-E3/5A | Vishay | 10 | 11.1 | 17 | 23.5A (10/1000µs) | 400 | DO-214AC (SMA) | -55 to 150 | ROHS3 |
| SMAJ10A-13-F | Diodes Inc. | 10 | 11.1 | 17 | 23.5A (10/1000µs) | 400 | DO-214AC (SMA) | -55 to 150 | ROHS3 |
| SMAJ10A-TP | Micro Commercial Co | 10 | 11.1 | 17 | 23.5A (10/1000µs) | 400 | DO-214AC (SMA) | -55 to 175 | ROHS3 |
| SMAJ10A | MDD | 10 | 11 | 17 | 23.5A (10/1000µs) | 400 | DO-214AC (SMA) | -50 to 150 | ROHS3 |
| PTVS10VS1UR,115 | Nexperia USA Inc. | 10 | 11.1 | 17 | 23.5A (10/1000µs) | 400 | SOD-123W | -55 to 150 | ROHS3 |
| SM4T12AY | STMicroelectronics | 10 | 11.1 | 21.7 | 106A (8/20µs) | 400 | DO-214AC (SMA) | -55 to 150 | ROHS3 |
| SMA6J10A-TR | STMicroelectronics | 10 | 11.1 | 19.6 | 184A (8/20µs) | 600 | DO-214AC (SMA) | -55 to 175 | ROHS3 |
Engineering Selection Recommendations
For Direct Replacement (Identical Electrical Performance): SMAJ10A-13-F, SMAJ10A-TP, and SMAJ10A are direct substitutes for the SMAJ10A-E3/5A when the 10/1000µs pulse waveform specification is required. All three maintain the 10V reverse standoff, 11.1V breakdown, 17V clamping, and 23.5A peak pulse current. Selection among these options depends on packaging preference (Tape & Reel vs. Cut Tape) and temperature operating range requirements. SMAJ10A-TP extends the upper operating temperature to 175°C compared to the original 150°C specification.
For Automotive Applications: PTVS10VS1UR,115 (Nexperia) provides AEC-Q101 automotive qualification with equivalent electrical performance in the SOD-123W package. This option is suitable for automotive-grade applications requiring formal qualification documentation.
For Higher Energy Transient Events (8/20µs Pulse Definition): SM4T12AY and SMA6J10A-TR are suitable when transient events follow the 8/20µs pulse waveform standard. These parts maintain the 10V reverse standoff voltage but exhibit higher clamping voltages (21.7V and 19.6V respectively) and significantly higher peak pulse currents (106A and 184A). SMA6J10A-TR additionally provides 600W peak pulse power rating and extended temperature range to 175°C.
All substitute options maintain RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage conditions.
Frequently Asked Questions (FAQ)
Q: Can SMAJ10A-13-F be used as a direct replacement for SMAJ10A-E3/5A? A: Yes. Both parts share identical electrical specifications: 10V reverse standoff voltage, 11.1V breakdown voltage, 17V clamping voltage, and 23.5A peak pulse current (10/1000µs). The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel) and manufacturer (Diodes Incorporated vs. Vishay).
Q: What is the difference between the 10/1000µs and 8/20µs pulse definitions? A: These represent different transient event waveforms. The 10/1000µs pulse is a longer-duration transient, while the 8/20µs pulse is a shorter, faster-rising transient. Parts specified for 8/20µs (SM4T12AY, SMA6J10A-TR) exhibit higher peak pulse currents and different clamping voltages under their respective pulse conditions. Selection depends on the actual transient waveform present in the application.
Q: Is PTVS10VS1UR,115 compatible with the original SMAJ10A-E3/5A in terms of electrical performance? A: Yes, electrically equivalent. However, PTVS10VS1UR,115 uses the SOD-123W package instead of DO-214AC (SMA). This requires PCB layout modification. The part includes AEC-Q101 automotive qualification, making it suitable for automotive applications.
Q: Can SM4T12AY or SMA6J10A-TR be used as drop-in replacements? A: Not as direct drop-in replacements. While both maintain the 10V reverse standoff voltage, they exhibit different clamping voltages (21.7V and 19.6V respectively) and significantly higher peak pulse currents due to the 8/20µs pulse definition. Use these parts only when the application transient waveform matches the 8/20µs specification and the higher clamping voltage is acceptable.
Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing processes and storage requirements.
Q: What is the temperature range consideration when selecting a substitute? A: The original SMAJ10A-E3/5A operates from -55°C to 150°C. SMAJ10A-TP and SMA6J10A-TR extend the upper limit to 175°C. SMAJ10A (MDD) has a lower minimum of -50°C. Select based on application temperature requirements.
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