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Vishay General Semiconductor - Diodes Division SMAJ17HE3/61
- Part No.:
- SMAJ17HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17HE3/61.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,678
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Product details
Overview
SMAJ17HE3/61 from Vishay General Semiconductor is a high-reliability, AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features 17 V stand-off voltage (VWM), 30.5 V maximum clamping voltage (VC) at 13.1 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 SMAJ17HE3/61 datasheet, SMAJ17HE3/61 pinout, SMAJ17HE3/61 application, or SMAJ17HE3/61 equivalent, this part serves as a robust, RoHS-compliant, high-whisker-resistance (JESD 201 Class 2) TVS for protecting MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in automotive ECUs and industrial control modules.
Technical Context
The SMAJ17HE3/61 employs a glass-passivated silicon junction optimized for fast response (<1 ps) and low incremental surge resistance, enabling precise clamping during sub-microsecond transients. Its unidirectional polarity-marked with a cathode band-supports DC-biased rail protection with defined forward conduction path.
Thermal performance is characterized by RθJA = 120 °C/W (on 0.2 × 0.2″ copper pads) and RθJL = 30 °C/W, supporting reliable operation under repetitive surge conditions up to 0.01% duty cycle. It meets MSL Level 1 per J-STD-020 and withstands solder reflow at 260 °C for 40 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines protected circuit's nominal rail level. |
| VC @ IPPM | 30.5 V - Clamped voltage at 13.1 A peak pulse current; ensures downstream ICs (e.g., 3.3 V or 5 V logic) remain below absolute maximum ratings. |
| IPPM | 13.1 A - Peak surge current capability with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 (4 kV) compliance when properly laid out. |
| PPPM | 400 W - Peak pulse power dissipation; enables protection of medium-energy transients without thermal runaway under single-event stress. |
| TJ Range | −55 °C to +150 °C - Extended junction temperature range confirms suitability for under-hood automotive environments and industrial enclosures. |
| Leakage ID | 1.0 µA max @ VWM - Ultra-low reverse leakage preserves battery life in always-on automotive modules and low-power sensor nodes. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case meeting UL 94 V-0 flammability rating. Cathode identified by a single band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or lower-potential node; enables clamping when cathode voltage exceeds VWM + VF. |
| Cathode | Clamping output / high-side connection | Connected to protected line (e.g., CAN_H, LIN, 12 V supply); conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HAST; required for engine control, ADAS, and body electronics. |
| JESD 201 Class 2 whisker resistance | Matte tin-plated leads resist tin whisker growth under thermal cycling and humidity, eliminating latent short-circuit risk in long-life systems. |
| 400 W peak pulse power (≤78 V) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a transients without derating; maintains clamping integrity across full temperature range. |
| Low clamping ratio (VC/VWM = 1.79) | Minimizes overvoltage overshoot during fast transients, reducing stress on downstream TVS cascades or IC input structures. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT assembly for high-volume automotive Tier 1 production. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and power management ICs in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going transients above 17 V. Use Value: Limits peak rail voltage to ≤30.5 V during 100 V/50 ms load dump events, preventing latch-up or gate oxide damage in 3.3 V/5 V logic. |
Use Scenario: Safeguarding analog outputs of pressure or temperature sensors connected to PLC analog input cards in factory automation. IC Role / Device Role / Timing Role: TVS mounted directly at sensor connector to shunt ESD (IEC 61000-4-2 ±8 kV contact) and inductive kickback from solenoid actuation. Use Value: Sub-1 ns response ensures clamping occurs before sensor amplifier input stages experience breakdown, preserving measurement accuracy and longevity. |
| Automotive CAN Bus Node Protection | Industrial Motor Drive Gate Driver Protection |
Use Scenario: Shielding CAN transceiver inputs (CAN_H/CAN_L) in vehicle infotainment head units from coupled transients on adjacent wiring harnesses. IC Role / Device Role / Timing Role: Dual unidirectional TVS (one per line) referenced to common ground, leveraging low capacitance (<100 pF) to avoid signal integrity degradation. Use Value: Maintains CAN FD bit rates up to 5 Mbps by limiting junction capacitance and ensuring <30.5 V clamping does not violate transceiver common-mode range. |
Use Scenario: Protecting high-side and low-side gate drivers in 3-phase inverters from Miller-induced dv/dt spikes and shoot-through transients. IC Role / Device Role / Timing Role: TVS placed across gate-source terminals of SiC MOSFETs to clamp negative VGS undershoot and positive overshoot beyond ±20 V. Use Value: Prevents unintended turn-on or gate oxide puncture during 100 V/ns switching events, extending driver IC lifetime in servo and HVAC drives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17AHE3/61 | Lower VBR min (18.9 V vs. 18.9 V same), tighter VBR tolerance (18.9–20.9 V vs. 18.9–23.1 V); clamps at 27.6 V @ 14.5 A. | Better suited for precision 17 V rails where tighter clamping consistency is required; slightly higher IPPM but lower VC. | Select SMAJ17AHE3/61 when system-level testing shows marginal margin with 30.5 V clamping; verify layout can support 14.5 A surge path. |
| SMBJ17HE3/61 | Same VWM/VC specs but in DO-214AA (SMB) package: 20 % larger footprint, 25 % higher PPPM (600 W), RθJA = 90 °C/W. | Preferred for higher-energy transients or thermally constrained PCBs needing lower junction-to-ambient resistance. | Choose SMBJ17HE3/61 only if 400 W is insufficient or thermal simulation shows >120 °C/W causes TJ exceedance; requires PCB pad redesign. |
Compared with SMAJ17HE3/61, SMAJ17AHE3/61 offers tighter clamping voltage control at the cost of reduced surge margin, while SMBJ17HE3/61 trades board space for higher power handling and better thermal performance-neither is pin-compatible due to differing package outlines and thermal pad requirements.
Availability
SMAJ17HE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and sensor interface modules requiring stable component supply with AEC-Q101 assurance and long-term lifecycle support.
Supply support for SMAJ17HE3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was engineered specifically for high-reliability transient suppression in harsh environments-prioritizing AEC-Q101 qualification, low leakage, and consistent clamping performance across temperature and surge repetition rates.
FAQ
What is the clamping voltage of SMAJ17HE3/61 under maximum rated surge current?
The SMAJ17HE3/61 has a maximum clamping voltage (VC) of 30.5 V when subjected to its rated peak pulse current (IPPM) of 13.1 A using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream IC overvoltage margin analysis in designs using the SMAJ17HE3/61.
Is SMAJ17HE3/61 suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMAJ17HE3/61 carries the HE3 suffix, explicitly denoting Vishay's high-reliability, AEC-Q101-qualified variant. It undergoes extended stress testing-including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-to meet automotive electronics reliability standards. The SMAJ17HE3/61 is approved for use in engine control, body electronics, and ADAS subsystems.
How does the HE3 suffix differ from the standard E3 suffix in SMAJ17HE3/61?
The HE3 suffix in SMAJ17HE3/61 indicates high-reliability, automotive-grade construction: it meets AEC-Q101 qualification, uses JESD 201 Class 2 whisker-resistant matte tin plating, and is screened for enhanced parametric stability. In contrast, the E3 suffix denotes commercial-grade RoHS compliance only, without automotive qualification or enhanced metallization-making SMAJ17HE3/61 the correct choice for mission-critical automotive designs.
What is the maximum reverse leakage current specified for SMAJ17HE3/61 at its stand-off voltage?
The SMAJ17HE3/61 specifies a maximum reverse leakage current (ID) of 1.0 µA at its 17 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage is maintained across the full −55 °C to +150 °C junction temperature range, ensuring minimal power drain in always-on automotive modules and battery-powered industrial sensors using the SMAJ17HE3/61.
Can SMAJ17HE3/61 be used in bi-directional protection configurations?
No, SMAJ17HE3/61 is a unidirectional TVS diode, identifiable by its cathode band marking and specified electrical characteristics for single-polarity clamping. For bi-directional protection, Vishay offers the SMAJ17CA or SMAJ17CAHE3/61 variants-these have symmetrical breakdown in both directions and no polarity marking. Using SMAJ17HE3/61 in a bi-directional configuration would result in forward conduction and failure during negative transients.
SMAJ17HE3/61 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- 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)
SMAJ17HE3/61 FAQ
1.How can I place an order for SMAJ17HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17HE3/61 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 SMAJ17HE3/61 reliable?
The price and inventory of SMAJ17HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ17HE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ17HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17HE3/61?
SMAJ17HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17HE3/61 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 SMAJ17HE3/61?
For technical support, including SMAJ17HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17HE3/61 requirements.
6.How does Aetrix verify that SMAJ17HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ17HE3/61 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 SMAJ17HE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ17HE3/61?
All SMAJ17HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17HE3/61, 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 SMAJ17HE3/61 part is unused and in its original packaging.
Return procedure for SMAJ17HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ17HE3/61 Tags
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