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Vishay General Semiconductor - Diodes Division SMAJ10HE3/5A
- Part No.:
- SMAJ10HE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10HE3/5A.pdf
- Description:
- TVS DIODE 10VWM 18.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,946
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Product details
Overview
SMAJ10HE3/5A from Vishay General Semiconductor is a high-reliability, AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) in DO-214AC (SMA) package, designed for automotive and industrial electronics protection. It features 10 V stand-off voltage (VWM), 18.8 V maximum clamping voltage (VC) at 21.3 A peak pulse current (IPPM), 400 W peak pulse power (10/1000 µs), and operates from −55 °C to +150 °C junction temperature.
For engineers reviewing the SMAJ10HE3/5A datasheet, SMAJ10HE3/5A pinout, SMAJ10HE3/5A application, or SMAJ10HE3/5A equivalent, this device is selected for robust ESD and surge protection on power rails and signal lines where automotive-grade reliability, low clamping voltage, and RoHS-compliant high-whisker-resistance matte tin terminations are required.
Technical Context
The SMAJ10HE3/5A employs a glass-passivated silicon avalanche junction optimized for fast response (<1 ps) to transient overvoltages. Its unidirectional polarity uses a cathode band marking and delivers precise clamping with 11.1–13.6 V breakdown voltage (VBR) at 1 mA test current.
Thermally, it exhibits 120 °C/W junction-to-ambient thermal resistance (RθJA) on standard 0.2 × 0.2″ copper pads and supports repetitive surge duty cycles up to 0.01 % at 400 W (derated to 300 W above 78 V). It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VC @ IPPM | 18.8 V - Clamped voltage at 21.3 A peak pulse current; ensures downstream ICs see ≤18.8 V during 10/1000 µs transients. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs waveform); enables protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 21.3 A - Peak surge current capability; determines minimum trace width and PCB layout robustness for surge paths. |
| TJ Range | −55 °C to +150 °C - Extended junction temperature range; supports under-hood automotive and industrial environments. |
| Whisker Class | JESD201 Class 2 - High-reliability matte tin plating; prevents tin whisker growth in long-life automotive modules. |
| AEC-Q101 | Qualified - Certified for automotive electronic systems per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-axis molded case with cathode band marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); 0.208″ × 0.110″ × 0.090″.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded end is opposite) | Connected to protected line; conducts during forward surge (e.g., reverse battery events in automotive). |
| Cathode | Clamping reference terminal (marked with band) | Connected to ground or lower-potential rail; defines clamping path for positive transients on anode side. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, low-leakage performance (≤1.0 µA at VWM) across temperature and lifetime. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection margin. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking-ideal for high-volume automated SMT assembly. |
| RoHS & WEEE compliant | Meets EU environmental directives; lead-free matte tin terminations ensure solderability and long-term interconnect integrity. |
| High-reliability HE3 suffix | Indicates AEC-Q101 qualification and JESD201 Class 2 whisker resistance-required for Tier-1 automotive supply chain traceability. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs (e.g., body control modules) against load dump and jump-start transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and upstream DC-DC converter input. Use Value: Clamps 12 V rail to ≤18.8 V during 400 W surges, preventing damage to LDOs and microcontrollers rated for 20 V max input. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules from ESD and inductive switching noise. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting transients to chassis ground before signal conditioning circuitry. Use Value: Sub-20 V clamping preserves signal integrity of 0–10 V or 4–20 mA interfaces while surviving >8 kV contact ESD (IEC 61000-4-2). |
| Automotive Infotainment Power Supply | Telecom Equipment DC Input Protection |
Use Scenario: Safeguarding USB-C PD and display power inputs in head units exposed to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Primary TVS on 5–12 V input rail, coordinated with secondary polymer PTC for overcurrent backup. Use Value: Fast <1 ps response and 21.3 A IPPM absorb MIL-STD-1275B pulses without degradation, ensuring system uptime. |
Use Scenario: Protecting 48 V PoE-powered network switches and base station radios from lightning-induced surges on DC input ports. IC Role / Device Role / Timing Role: First-stage clamping device ahead of buck converters and PMICs in telecom power entry circuits. Use Value: 400 W rating and −55 °C to +150 °C operation support outdoor deployment in harsh climates per GR-1089-CORE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10AHE3/5A | Lower breakdown voltage (11.1–12.3 V vs. 11.1–13.6 V); tighter VBR tolerance. | Better suited for precision 10 V rail protection where tighter clamping consistency is critical. | Select SMAJ10AHE3/5A when VBR matching and reduced VC variation (17.0 V max) outweigh need for higher surge margin. |
| SMBJ10HE3/5A | Same electrical specs but SMB (DO-214AA) package - 30 % larger footprint, 10 % higher RθJA (130 °C/W). | Preferred where board space allows and higher thermal mass improves sustained surge endurance. | Choose SMBJ10HE3/5A only if PCB layout permits larger pad area and thermal relief is prioritized over miniaturization. |
Compared with SMAJ10HE3/5A, SMAJ10AHE3/5A offers tighter VBR control for predictable clamping onset, while SMBJ10HE3/5A trades compactness for improved thermal dissipation-neither is pin-compatible due to differing package outlines and thermal pad requirements.
Availability
SMAJ10HE3/5A is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power entry protection requiring stable component supply, full AEC-Q101 traceability, and high-reliability RoHS compliance.
Supply support for SMAJ10HE3/5A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was engineered for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where failure modes must be mitigated via proven avalanche ruggedness and AEC-Q101 validation.
FAQ
What is the peak pulse power rating of the SMAJ10HE3/5A?
The SMAJ10HE3/5A has a peak pulse power rating (PPPM) of 400 W for 10/1000 µs waveform at TA = 25 °C. This rating applies up to 78 V VWM; above that, it derates to 300 W. The value is measured with devices mounted on 0.2 × 0.2″ copper pads per JEDEC standards, and SMAJ10HE3/5A maintains this capability across its full −55 °C to +150 °C operating junction range.
Is the SMAJ10HE3/5A suitable for automotive applications?
Yes, the SMAJ10HE3/5A is AEC-Q101 qualified and carries the HE3 suffix indicating high-reliability automotive grade. It passes stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), and meets JESD201 Class 2 whisker resistance-making SMAJ10HE3/5A appropriate for engine control units, ADAS sensors, and infotainment systems.
What does the "HE3" suffix mean in SMAJ10HE3/5A?
The "HE3" suffix in SMAJ10HE3/5A denotes RoHS-compliant, high-reliability/automotive-grade construction. Specifically, "H" indicates AEC-Q101 qualification, "E3" confirms RoHS compliance and commercial-grade packaging, and the full HE3 designation certifies JESD201 Class 2 whisker resistance-critical for long-life automotive deployments where tin whisker growth could cause latent field failures.
How does the clamping voltage of SMAJ10HE3/5A compare to its stand-off voltage?
The SMAJ10HE3/5A has a stand-off voltage (VWM) of 10 V and a maximum clamping voltage (VC) of 18.8 V at 21.3 A IPPM. This 8.8 V differential provides a robust safety margin for 12 V nominal systems, ensuring downstream components experience no more than 18.8 V during worst-case transients-well below typical 20–24 V absolute maximum ratings of automotive-grade regulators and microcontrollers.
What is the thermal resistance of SMAJ10HE3/5A, and how does it affect layout?
SMAJ10HE3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2 × 0.2″ copper pads per JEDEC 51-3. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA, directly lowering junction temperature rise during repetitive surges. Layout must follow Vishay's recommended DO-214AC mounting pad dimensions to guarantee rated 400 W performance and avoid thermal runaway.
SMAJ10HE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 18.8V
- Current - Peak Pulse (10/1000µs):
- 21.3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ10HE3/5A FAQ
1.How can I place an order for SMAJ10HE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10HE3/5A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMAJ10HE3/5A reliable?
The price and inventory of SMAJ10HE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10HE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ10HE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10HE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10HE3/5A?
SMAJ10HE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10HE3/5A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMAJ10HE3/5A?
For technical support, including SMAJ10HE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10HE3/5A requirements.
6.How does Aetrix verify that SMAJ10HE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ10HE3/5A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMAJ10HE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ10HE3/5A?
All SMAJ10HE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10HE3/5A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMAJ10HE3/5A part is unused and in its original packaging.
Return procedure for SMAJ10HE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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