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Vishay General Semiconductor - Diodes Division SM6S17ATHE3/I
- Part No.:
- SM6S17ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM6S17ATHE3/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,409
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Product details
Overview
SM6S17ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 17 V stand-off voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 5 mA, 4600 W peak pulse power (10/1000 μs), 167 V clamping voltage at 150 A, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM6S17ATHE3/I datasheet, SM6S17ATHE3/I pinout, SM6S17ATHE3/I application, or SM6S17ATHE3/I equivalent, key selection criteria include its DO-218AC package with heatsink-anode polarity, 175 °C junction rating, ISO7637-2 compliance, low leakage (<10 μA at VWM), and 0.95 °C/W thermal resistance for high-reliability automotive power rail protection.
Technical Context
This TVS diode operates as a unidirectional clamping device in series with the anode connected to the heatsink (cathode as output terminal), enabling robust suppression of positive-going transients such as 12 V automotive load dump events. Its passivated anisotropic rectifier structure ensures stable VBR temperature coefficient (0.082 %/°C) and low forward voltage drop (≤1.9 V at 100 A).
The device delivers 4600 W surge capability under 10/1000 μs waveform and retains 3600 W under longer 10/10 000 μs pulses, supporting both ISO7637-2 Pulse 5a and Pulse 5b test conditions. Its MSL Level 1 rating and JESD201 Class 2 whisker resistance confirm suitability for lead-free reflow assembly in automotive production environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/typ/max) | 18.9 / 19.9 / 20.9 V at 5 mA - Ensures precise turn-on threshold with ±5% tolerance |
| VC @ IPPM | 167 V at 150 A - Clamping voltage limiting downstream IC stress during 4600 W surge |
| PPPM (10/1000 μs) | 4600 W - Sustains high-energy automotive load dump transients without failure |
| TJ max. | +175 °C - Enables placement near hot engine control units without derating |
| RθJC | 0.95 °C/W - Enables effective heat transfer to PCB copper or external heatsink |
| Polarity | Unidirectional - Protects against positive transients only; anode tied to heatsink/chassis |
Pinout & Package
Package: DO-218AC - Surface-mount molded case with integral metal heatsink (anode terminal), UL 94 V-0 rated, matte tin-plated leads, compatible with J-STD-002 solderability and JESD22-B102 thermal shock testing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Input/Power Rail Connection | Mounted directly to PCB copper pour or chassis ground for thermal and electrical return path |
| Cathode (Lead 1) | Clamped Output Terminal | Connected to protected circuit; carries clamped transient current away from sensitive loads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive under-hood use, including temperature cycling, humidity bias, and mechanical shock |
| Junction passivation technology | Stable VBR over lifetime and temperature; eliminates parametric drift in harsh environments |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 245 °C peak without preconditioning |
| ISO7637-2 compliance | Meets Pulse 5a (load dump) and Pulse 5b (superimposed ripple) requirements for 12 V systems |
| Low leakage at 175 °C | <10 μA at VWM - Prevents excessive quiescent current drain in always-on vehicle modules |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) Supply Rail |
|---|---|
Use Scenario: Protection of 12 V supply input to microcontroller-based ECU against alternator load dump spikes up to 40 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery feed and DC/DC input stage. Use Value: Limits transient voltage to ≤167 V at 150 A, preventing damage to upstream regulators and MCU power pins. | Use Scenario: Guarding BCM 12 V rail from switching noise and load dump during door lock/unlock actuation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry point, mounted directly to chassis-grounded copper pour. Use Value: Delivers 4600 W surge handling with 0.95 °C/W RθJC, ensuring thermal stability during repeated transient events. |
| Advanced Driver Assistance System (ADAS) Camera Module | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Safeguarding image sensor and ISP power supply in rear-view camera exposed to vehicle battery fluctuations. IC Role / Device Role / Timing Role: Standoff-rated TVS (17 V) placed upstream of LDO regulator feeding CMOS image sensor. Use Value: Maintains <10 μA leakage at 175 °C, minimizing standby current in always-on vision systems. | Use Scenario: Protecting H-bridge gate drivers and current sense amplifiers from inductive kickback during EPS motor commutation. IC Role / Device Role / Timing Role: High-surge-capability TVS integrated into motor driver PCB layout with direct heatsink coupling. Use Value: Withstands 600 A IFSM surge and clamps within 167 V, preserving MOSFET gate oxide integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM6S17AHM3 | Same VWM/VBR/PPPM specs; HM3 suffix indicates halogen-free, enhanced moisture resistance (MSL 1, J-STD-020) | Preferred for new designs requiring RoHS+halogen-free compliance and extended moisture sensitivity control | Select SM6S17AHM3 for new automotive programs; SM6S17ATHE3/I remains valid for legacy HE3-specified builds |
| SMAJ17A | Lower PPPM (400 W), SMA package (DO-214AC), higher RθJA, no AEC-Q101 qualification | Suitable for non-automotive industrial or consumer applications with lower surge energy requirements | Use SMAJ17A only where ISO7637-2 compliance and 175 °C operation are not required |
Compared with SM6S17AHM3, the SM6S17ATHE3/I offers identical electrical performance but lacks halogen-free certification and has slightly less stringent moisture sensitivity controls; versus SMAJ17A, it delivers >11× higher surge power, automotive qualification, and superior thermal performance-making it essential for under-hood deployment.
Availability
SM6S17ATHE3/I is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS camera systems, and electric power steering applications requiring stable component supply across long production lifecycles.
Supply support for SM6S17ATHE3/I 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, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SM6SxxAT family is engineered specifically for automotive-grade transient suppression, emphasizing high-temperature stability (175 °C), AEC-Q101 qualification, and ISO7637-2 compliance in compact DO-218AC packaging.
FAQ
What is the maximum clamping voltage of the SM6S17ATHE3/I at its rated peak pulse current?
The SM6S17ATHE3/I has a maximum clamping voltage (VC) of 167 V at 150 A peak pulse current under 10/1000 μs waveform. This value is specified in the Electrical Characteristics table and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The clamping performance is guaranteed across the full operating temperature range and supports reliable protection of downstream 12 V automotive electronics.
Is the SM6S17ATHE3/I qualified for automotive applications?
Yes, the SM6S17ATHE3/I is AEC-Q101 qualified and explicitly designed for automotive use. Its qualification covers temperature cycling, mechanical shock, humidity bias, and high-temperature operating life testing. The device meets ISO7637-2 Pulse 5a and 5b requirements and operates reliably from –55 °C to +175 °C, making it suitable for engine control units, body control modules, and other under-hood applications where the SM6S17ATHE3/I is deployed.
What does the HE3 suffix indicate in SM6S17ATHE3/I?
The HE3 suffix in SM6S17ATHE3/I denotes RoHS-compliant construction with matte tin-plated leads, JESD201 Class 2 whisker resistance, and compliance with Vishay's material categorization per doc#99912. It also signifies that the part is supplied in 13-inch plastic tape and reel (750 units per reel), with anode oriented toward the sprocket hole. This suffix identifies the SM6S17ATHE3/I as the standard automotive-grade variant within the SM6SxxAT family.
Can the SM6S17ATHE3/I be used in bidirectional transient protection circuits?
No, the SM6S17ATHE3/I is unidirectional only and must be used with correct polarity: anode connected to the power rail or chassis, cathode to the protected line. It does not suppress negative-going transients. For bidirectional protection, a separate design using two unidirectional devices or a dedicated bidirectional TVS (e.g., SMBJ17CA) would be required. The SM6S17ATHE3/I datasheet explicitly states "Available in unidirectional polarity only."
What is the thermal resistance from junction to case (RθJC) for the SM6S17ATHE3/I?
The SM6S17ATHE3/I has a typical thermal resistance of 0.95 °C/W from junction to case (RθJC), measured under standard test conditions. This low value reflects the DO-218AC package's integrated metal heatsink, which enables efficient heat transfer to the PCB copper pour or external thermal plane. Proper mounting of the anode (heatsink) to a ≥1 in² copper area is required to maintain this thermal performance in actual SM6S17ATHE3/I applications.
SM6S17ATHE3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- Series:
- PAR®
- 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:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 167A
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AC
SM6S17ATHE3/I FAQ
1.How can I place an order for SM6S17ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S17ATHE3/I 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 SM6S17ATHE3/I reliable?
The price and inventory of SM6S17ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S17ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM6S17ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S17ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S17ATHE3/I?
SM6S17ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S17ATHE3/I 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 SM6S17ATHE3/I?
For technical support, including SM6S17ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S17ATHE3/I requirements.
6.How does Aetrix verify that SM6S17ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM6S17ATHE3/I 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 SM6S17ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM6S17ATHE3/I?
All SM6S17ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6S17ATHE3/I, 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 SM6S17ATHE3/I part is unused and in its original packaging.
Return procedure for SM6S17ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S17ATHE3/I Tags
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