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Vishay General Semiconductor - Diodes Division SMAJ10HE3/61
- Part No.:
- SMAJ10HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10HE3/61.pdf
- Description:
- TVS DIODE 10VWM 18.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,262
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Product details
Overview
SMAJ10HE3/61 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 10 V stand-off voltage (VWM), 18.8 V maximum clamping voltage (VC) at 21.3 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), protecting sensitive MOSFETs and ICs against inductive switching transients.
For engineers reviewing the SMAJ10HE3/61 datasheet, SMAJ10HE3/61 pinout, SMAJ10HE3/61 application, or SMAJ10HE3/61 equivalent, this device serves as a RoHS-compliant, high-reliability TVS diode with verified 150 °C junction temperature rating, matte tin-plated leads per J-STD-002, and JESD201 Class 2 whisker resistance - critical for automotive ECU and powertrain module designs requiring long-term surge immunity.
Technical Context
The SMAJ10HE3/61 employs a glass-passivated silicon avalanche junction optimized for fast response (<1 ps) to transient events and low incremental surge resistance. Its unidirectional configuration provides forward conduction capability with 3.5 V forward voltage (VF) at 25 A, enabling bidirectional protection when paired with complementary devices.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W on standard 0.2 × 0.2" copper pads, supporting operation across –55 °C to +150 °C junction range. The HE3 suffix confirms AEC-Q101 qualification, high-reliability automotive grade, and compliance with MSL Level 1 (260 °C reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V automotive systems. |
| VC @ IPPM | 18.8 V - Clamped voltage during 21.3 A 10/1000 µs surge; ensures downstream ICs (e.g., MCU I/O) remain below absolute maximum ratings. |
| IPPM | 21.3 A - Peak surge current handling capacity under standardized waveform; validated for repetitive 0.01% duty cycle. |
| PPPM | 400 W - Peak pulse power dissipation; enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in vehicle networks. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood placement in engine control units without derating. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; minimizes quiescent power loss in always-on circuits. |
| VBR min./max. | 11.1 V / 13.6 V - Breakdown voltage range at 1 mA test current; guarantees consistent clamping onset across production lots. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002; polarity indicated by cathode band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected line (e.g., CAN_H); conducts during positive surges when cathode is biased higher. |
| Cathode | Clamping reference / surge sink | Connected to ground or lower-potential rail; avalanche breakdown occurs here to clamp voltage during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, chassis, and ADAS modules per stress test requirements. |
| Glass-passivated junction | Ensures stable electrical parameters and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C) | Enables single-reflow assembly without moisture sensitivity concerns; eliminates bake-out requirement. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-vibration environments, critical for safety-critical automotive electronics. |
| 400 W peak pulse power (10/1000 µs) | Meets ISO 16750-2 and SAE J1113-11 surge immunity requirements for 12 V vehicle systems. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control units (ECUs) from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and LDO regulator input to clamp transients before they reach voltage regulators and microcontrollers. Use Value: Limits voltage to ≤18.8 V during 21.3 A surges, preventing damage to 20 V-rated input capacitors and 5 V LDOs downstream. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs from ESD and cable-induced surges. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt fast transients (<1 ns rise time) before reaching op-amp front-end stages. Use Value: 1.0 µA leakage preserves signal integrity in µA-level sensor bias networks; 150 °C rating supports operation near motor drives. |
| Automotive CAN Bus Protection | DC-DC Converter Input Protection |
Use Scenario: Safeguarding CAN transceivers (e.g., TJA1042) against ESD and ISO 7637-3 coupled transients on vehicle data lines. IC Role / Device Role / Timing Role: Paired unidirectional SMAJ10HE3/61 on CAN_H and CAN_L lines referenced to ground, providing symmetric clamping. Use Value: 18.8 V clamping ensures transceiver common-mode range (±36 V) remains intact while limiting differential overshoot to safe levels. |
Use Scenario: Guarding buck converter inputs in infotainment head units against battery line transients during cold-crank and jump-start conditions. IC Role / Device Role / Timing Role: TVS placed upstream of input filter capacitor to absorb energy before it stresses MOSFETs and gate drivers. Use Value: 400 W pulse rating handles 100 ms load-dump events; DO-214AC footprint allows compact layout adjacent to DC input terminals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10AHE3/61 | Lower VBR range (11.1–12.3 V) and reduced VC (17.0 V); same 400 W rating and AEC-Q101 qualification. | Better suited for tighter voltage margins (e.g., 12 V systems with <15 V absolute max IC inputs). | Select SMAJ10AHE3/61 when clamping voltage headroom is constrained; verify compatibility with system VWM tolerance. |
| SMCJ10HE3/61 | Same VWM/VC but in larger DO-214AB (SMC) package; rated for 1500 W peak pulse power and 129 A IPPM. | Used where higher surge energy (e.g., ISO 7637-2 Pulse 5b) must be absorbed without derating. | Choose SMCJ10HE3/61 only if PCB space permits larger footprint and higher energy handling is required; not drop-in compatible. |
Compared with SMAJ10HE3/61, SMAJ10AHE3/61 offers tighter clamping for margin-sensitive designs, while SMCJ10HE3/61 delivers 3.75× higher surge energy capacity at the cost of larger board area - neither is pin-compatible, but both share identical AEC-Q101 qualification and automotive-grade construction.
Availability
SMAJ10HE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and DC-DC converter input protection requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SMAJ10HE3/61 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMAJ series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing thermal stability, surge robustness, and long-term parametric consistency under vibration and thermal cycling.
FAQ
What is the clamping voltage of SMAJ10HE3/61 under a 10/1000 µs surge?
The SMAJ10HE3/61 has a maximum clamping voltage (VC) of 18.8 V at 21.3 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and reflects worst-case performance after aging and thermal stress, making it suitable for protecting 20 V-tolerant ICs in automotive power domains.
Is SMAJ10HE3/61 qualified for automotive use?
Yes, SMAJ10HE3/61 carries the HE3 suffix, confirming full AEC-Q101 qualification for high-reliability automotive applications. It meets stress test requirements including temperature cycling, high-temperature operating life, and mechanical shock - validated for use in engine control units, body controllers, and ADAS modules.
What does the "HE3" suffix mean in SMAJ10HE3/61?
The "HE3" suffix in SMAJ10HE3/61 denotes high-reliability, automotive-grade qualification: "H" indicates AEC-Q101 compliance, "E3" specifies RoHS-compliant matte tin plating meeting JESD201 Class 2 whisker resistance. This distinguishes it from commercial-grade "E3" variants and ensures suitability for safety-critical vehicle systems.
Can SMAJ10HE3/61 be used in bi-directional protection circuits?
No - SMAJ10HE3/61 is a unidirectional TVS diode, identifiable by its cathode band marking. For bi-directional protection, Vishay specifies CA-suffix parts like SMAJ10CA. Using SMAJ10HE3/61 in reverse-biased configurations risks permanent failure due to lack of symmetrical avalanche capability.
What is the thermal resistance of SMAJ10HE3/61, and how does it affect layout?
SMAJ10HE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2 × 0.2" copper pads per terminal. To maintain TJ ≤ 150 °C under 400 W pulses, designers must ensure adequate copper area and avoid thermal bottlenecks - undersized pads will cause premature thermal runaway during repetitive surges.
SMAJ10HE3/61 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):
- 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)
SMAJ10HE3/61 FAQ
1.How can I place an order for SMAJ10HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10HE3/61 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 SMAJ10HE3/61 reliable?
The price and inventory of SMAJ10HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ10HE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ10HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10HE3/61?
SMAJ10HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10HE3/61 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 SMAJ10HE3/61?
For technical support, including SMAJ10HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10HE3/61 requirements.
6.How does Aetrix verify that SMAJ10HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ10HE3/61 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 SMAJ10HE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ10HE3/61?
All SMAJ10HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10HE3/61, 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 SMAJ10HE3/61 part is unused and in its original packaging.
Return procedure for SMAJ10HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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