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Vishay General Semiconductor - Diodes Division SMAJ8.0HE3/61
- Part No.:
- SMAJ8.0HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ8.0HE3/61.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ8.0HE3/61 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 overvoltage protection. It features 8.0 V stand-off voltage (VWM), 15.0 V maximum clamping voltage (VC) at 26.7 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor signal lines against inductive switching transients.
For engineers reviewing the SMAJ8.0HE3/61 datasheet, SMAJ8.0HE3/61 pinout, SMAJ8.0HE3/61 application, or SMAJ8.0HE3/61 equivalent, this page delivers verified electrical parameters, automotive-grade qualification status, thermal resistance values (RθJA = 120 °C/W), junction-to-lead thermal performance, and real-world clamping behavior under standardized surge conditions.
Technical Context
This unidirectional TVS diode operates with a breakdown voltage (VBR) of 8.89–10.9 V at 1.0 mA test current, ensuring reliable turn-on before system damage occurs. Its low incremental surge resistance enables rapid energy diversion during ESD or lightning-induced surges, while the glass-passivated junction ensures stable long-term performance under thermal cycling.
The device meets MSL Level 1 per J-STD-020, supports solder reflow up to 260 °C, and uses matte tin-plated leads compliant with J-STD-002 and JESD22-B102. The HE3 suffix confirms AEC-Q101 qualification and JESD201 Class 2 whisker resistance - critical for automotive powertrain and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum reverse working voltage before conduction; defines safe operating margin for 5 V–8 V logic/sensor rails. |
| VC @ IPPM | 15.0 V - Clamped voltage at 26.7 A surge; limits downstream IC stress below typical 16 V absolute max ratings. |
| IPPM | 26.7 A - Peak surge current with 10/1000 µs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) compliance when properly laid out. |
| PPPM | 400 W - Peak pulse power handling; sustains single-event transients without degradation in automotive ambient (−40 °C to +125 °C). |
| TJ Range | −55 °C to +150 °C - Full operational junction temperature range; validated for under-hood and engine control unit environments. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; informs PCB copper area requirements for thermal reliability. |
| Leakage @ VWM | < 1.0 µA - Ultra-low reverse leakage at rated stand-off; avoids signal integrity issues in high-impedance sensor interfaces. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating. Cathode identified by band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; forms return path for clamped surge current. |
| Cathode | High-side protected node | Connected to line being protected (e.g., CAN_H, LIN, sensor VOUT); conducts during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, chassis, and ADAS subsystems per stress test requirements. |
| Glass-passivated junction | Ensures stable VBR and leakage over 1000+ thermal cycles; eliminates interfacial corrosion in humid environments. |
| MSL Level 1 rating | Zero floor life limitation; supports standard SMT assembly without baking or dry-pack handling. |
| 400 W 10/1000 µs capability | Handles repetitive transients up to 0.01% duty cycle - sufficient for motor driver commutation spikes and relay coil flyback. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under temperature/humidity bias; required for long-life automotive modules (>15 years). |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT input and ground, clamping surges within 1 ns. Use Value: Limits clamped voltage to 15.0 V, keeping downstream LDOs and microcontrollers within safe operating area during 35 V/100 ms transients. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop sensors) from ESD and field wiring faults. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMAJ8.0HE3/61 used as unidirectional clamp on supply side of sensor front-end. Use Value: Sub-µA leakage preserves accuracy of µA-level current sensing; 15.0 V clamping prevents op-amp saturation during cable discharge events. |
| Automotive LIN Bus Protection | Consumer Power Adapter Input Protection |
Use Scenario: Safeguarding LIN transceiver pins (e.g., TJA1020) against battery connection reversal and ESD. IC Role / Device Role / Timing Role: Anode tied to LIN bus, cathode to VCC; conducts during negative transients and positive overvoltage. Use Value: 8.0 V VWM aligns with LIN's 12 V nominal supply; 15.0 V VC stays below transceiver's 18 V abs max, enabling robust fault tolerance. |
Use Scenario: Input-stage surge suppression in wall adapters for smart home devices exposed to mains-borne transients. IC Role / Device Role / Timing Role: Placed across primary-side DC link after bridge rectifier, shunting fast-rising spikes before bulk capacitor. Use Value: 400 W rating handles IEC 61000-4-5 combination wave surges; DO-214AC footprint allows automated placement without sacrificing power density. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0AHE3/61 | Lower VBR range (8.89–9.83 V) and tighter VWM tolerance; clamps at 13.6 V @ 29.4 A. | Better suited for 5 V systems with tighter voltage margins; lower clamping reduces stress on 5 V tolerant ICs. | Select SMAJ8.0AHE3/61 when protecting 5 V logic rails where 13.6 V clamping provides larger safety margin vs. 15.0 V. |
| SMBJ8.0HE3/61 | Same VWM/VC specs but in DO-214AA (SMB) package - 25 % larger footprint and 10 % higher PPPM (600 W). | Preferred for higher-energy transients or where board space permits larger thermal mass; not drop-in compatible. | Choose SMBJ8.0HE3/61 only if surge energy exceeds 400 W capability or thermal design requires lower RθJA. |
Compared with SMAJ8.0HE3/61, SMAJ8.0AHE3/61 offers lower clamping for tighter-margin 5 V designs, while SMBJ8.0HE3/61 trades pin compatibility for higher surge capacity - neither is pin-to-pin interchangeable, requiring layout revision for substitution.
Availability
SMAJ8.0HE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and consumer power adapter designs requiring stable component supply with AEC-Q101 traceability and RoHS compliance.
Supply support for SMAJ8.0HE3/61 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, and protection devices with emphasis on reliability and automotive qualification.
The SMAJ series was developed specifically for high-reliability transient suppression in harsh environments - targeting automotive power distribution, industrial automation, and telecom infrastructure where failure modes must be rigorously controlled.
FAQ
What is the peak pulse power rating of SMAJ8.0HE3/61 and under what test condition?
The SMAJ8.0HE3/61 has a peak pulse power rating (PPPM) of 400 W, measured using the standardized 10/1000 µs double-exponential surge waveform per IEC 61000-4-5. This rating applies at TA = 25 °C with mounting on 0.2" × 0.2" copper pads per terminal, and is derated above 25 °C per Figure 2 in Vishay document 88390. The SMAJ8.0HE3/61 maintains this rating up to 78 V; above that, it drops to 300 W.
Is SMAJ8.0HE3/61 suitable for bidirectional transient protection?
No, SMAJ8.0HE3/61 is a unidirectional TVS diode - its cathode band indicates polarity, and it conducts only when the cathode is more positive than the anode by ≥ VBR. For bidirectional protection, Vishay specifies CA-suffix parts (e.g., SMAJ8.0CA). Using SMAJ8.0HE3/61 in reverse-biased configurations risks permanent breakdown; always verify polarity during layout. The SMAJ8.0HE3/61 data sheet explicitly lists it under "UNI" column only.
What does the "HE3" suffix indicate in SMAJ8.0HE3/61?
The "HE3" suffix denotes two key qualifications: "H" signifies high-reliability / automotive grade per AEC-Q101, and "E3" indicates RoHS-compliant, matte tin-plated leads meeting JESD201 Class 2 whisker resistance. This distinguishes SMAJ8.0HE3/61 from commercial-grade "E3" parts (e.g., SMAJ8.0E3/61) and confirms suitability for automotive applications requiring extended lifetime and thermal cycling robustness. The SMAJ8.0HE3/61 is fully traceable to Vishay's automotive production line.
What is the maximum clamping voltage of SMAJ8.0HE3/61 and at what current is it specified?
The maximum clamping voltage (VC) of SMAJ8.0HE3/61 is 15.0 V, measured at the peak pulse current (IPPM) of 26.7 A using the 10/1000 µs waveform. This value is guaranteed across temperature (−55 °C to +150 °C) and represents the worst-case voltage seen by protected circuitry during a full-rated surge event. The SMAJ8.0HE3/61 achieves this clamping with low dynamic impedance, minimizing let-through energy to downstream components.
How does SMAJ8.0HE3/61 differ from SMAJ8.0AHE3/61?
SMAJ8.0HE3/61 has a breakdown voltage (VBR) range of 8.89–10.9 V and clamps at 15.0 V, while SMAJ8.0AHE3/61 has a tighter VBR range of 8.89–9.83 V and clamps at 13.6 V. The "A" variant offers lower clamping for 5 V systems, whereas SMAJ8.0HE3/61 targets broader 8–12 V applications. Both share AEC-Q101 qualification, DO-214AC package, and HE3 suffix - but they are not interchangeable without verifying system voltage margins. The SMAJ8.0HE3/61 datasheet tables list them as distinct entries with separate marking codes (AQ vs. AR).
SMAJ8.0HE3/61 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 26.7A
- 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)
SMAJ8.0HE3/61 FAQ
1.How can I place an order for SMAJ8.0HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ8.0HE3/61 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 SMAJ8.0HE3/61 reliable?
The price and inventory of SMAJ8.0HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ8.0HE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ8.0HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ8.0HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ8.0HE3/61?
SMAJ8.0HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ8.0HE3/61 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 SMAJ8.0HE3/61?
For technical support, including SMAJ8.0HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ8.0HE3/61 requirements.
6.How does Aetrix verify that SMAJ8.0HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ8.0HE3/61 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 SMAJ8.0HE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ8.0HE3/61?
All SMAJ8.0HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ8.0HE3/61, 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 SMAJ8.0HE3/61 part is unused and in its original packaging.
Return procedure for SMAJ8.0HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ8.0HE3/61 Tags
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