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Vishay General Semiconductor - Diodes Division SM8S17-E3/2D
- Part No.:
- SM8S17-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S17-E3/2D.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,989
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Product details
Overview
SM8S17-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for automotive load dump protection in high-reliability 12 V systems. It features a 17.0 V stand-off voltage (VWM), 30.5 V maximum clamping voltage (VC) at 216 A peak pulse current, and 6600 W peak pulse power (10/1000 μs), operating up to TJ = 175 °C.
For engineers reviewing the SM8S17-E3/2D datasheet, SM8S17-E3/2D pinout, SM8S17-E3/2D application, or SM8S17-E3/2D equivalent, this page delivers verified electrical ratings, DO-218AB package details, AEC-Q101 qualification status, ISO7637-2 compliance context, and real-world automotive protection use cases - all grounded in Vishay Document #88387.
Technical Context
The SM8S17-E3/2D employs passivated anisotropic rectifier technology optimized for junction stability under high-temperature transients. Its unidirectional polarity and heatsink-anode configuration enable direct thermal coupling to PCB copper, supporting sustained operation at TJ = 175 °C with low leakage (≤10 μA at VWM) and low forward voltage (≤1.8 V at 100 A).
It meets ISO7637-2 load dump surge requirements using its 10 ms exponential waveform capability and delivers 5200 W peak pulse power under the longer 10/10 000 μs waveform. Thermal resistance RθJC is 0.90 °C/W, enabling efficient heat transfer from junction to case in high-power automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17.0 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold for 12 V automotive rails. |
| VC @ IPPM | 30.5 V - Clamped voltage at 216 A (10/1000 μs); ensures downstream ICs see ≤30.5 V during worst-case load dump events. |
| PPPM (10/1000 μs) | 6600 W - Peak transient energy handling capacity; supports robust protection against ISO7637-2 Pulse 5a/b surges. |
| TJ max. | 175 °C - Maximum junction temperature rating; enables placement near hot engine-control electronics without derating. |
| RθJC | 0.90 °C/W - Low thermal resistance from junction to case; allows effective heat sinking via PCB copper pour or metal-core board. |
| AEC-Q101 | Qualified - Certified for automotive-grade reliability per stress test standard; required for under-hood and powertrain applications. |
| MSL Level | Level 1 (J-STD-020) - No moisture sensitivity restrictions; supports standard SMT reflow up to 245 °C peak without baking. |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with integral metal heatsink (anode terminal). Molding compound rated UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit's positive rail; carries transient current into the device during clamping. |
| Lead 2 / Metal Heatsink | Anode | Primary thermal path and electrical return; must be soldered to large copper area for thermal management and low-inductance grounding. |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable breakdown behavior and low leakage (<10 μA) across full temperature range (−55 °C to +175 °C). |
| DO-218AB thermal design | Integrates metal heatsink as anode terminal, reducing RθJC to 0.90 °C/W and enabling >8 W steady-state dissipation on infinite heatsink. |
| ISO7637-2 compliance (load dump) | Validated for Pulse 5a/b (10 ms exponential) up to 5200 W, meeting OEM requirements for 12 V vehicle battery line protection. |
| AEC-Q101 qualification | Includes HTGB, HTRB, TC, AC/DC life testing - confirms suitability for safety-critical automotive modules (ECUs, ADAS, body control). |
| Low forward voltage drop | ≤1.8 V at 100 A (8.3 ms half-sine) minimizes conduction loss during surge events and reduces thermal stress during repeated transients. |
Applications
| Engine Control Unit (ECU) Protection | Body Control Module (BCM) Power Input |
|---|---|
|
Use Scenario: Protects microcontroller power rails and CAN transceivers from alternator load dump surges during battery disconnect/reconnect events in gasoline/diesel vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and DC/DC converter input; clamps transients within 1 ns response time. Use Value: Limits voltage to ≤30.5 V during 6600 W surges, preventing latch-up or permanent damage to 3.3 V/5 V logic and analog front-ends. |
Use Scenario: Shields BCM power supply from coupled transients generated by high-current loads (headlamps, wipers, HVAC motors) switching on shared vehicle battery lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V main input; operates in parallel with upstream fuses and downstream LC filters. Use Value: Withstands 700 A non-repetitive forward surge (IFSM) and maintains <10 μA leakage at 17 V, ensuring low quiescent current in always-on modules. |
| ADAS Camera Power Supply | Electric Power Steering (EPS) ECU |
|
Use Scenario: Secures 12 V input to image sensor and ISP power management ICs in rear-view or surround-view cameras exposed to under-hood thermal and electrical stress. IC Role / Device Role / Timing Role: First-line transient suppressor before buck converter; absorbs fast-rising spikes induced by nearby solenoid actuation. Use Value: 175 °C junction rating and AEC-Q101 qualification ensure reliable operation in sealed camera housings where ambient exceeds 105 °C. |
Use Scenario: Guards EPS motor driver power stage and MCU supply against load dump and inductive kickback from high-current 3-phase gate drivers. IC Role / Device Role / Timing Role: High-energy TVS connected directly to battery rail; works with ceramic bypass capacitors to suppress sub-100 ns ringing. Use Value: 0.90 °C/W RθJC enables mounting on thick copper layers, sustaining repeated 216 A pulses without thermal runaway during steering assist maneuvers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/5BT | Lower PPPM (400 W), SMA package (RθJC ≈ 45 °C/W), VC = 27.6 V at 12.9 A - not suitable for load dump. | Targeted at board-level ESD/surge (IEC 61000-4-2/4-4), not automotive load dump or ISO7637-2. | Select only for low-energy signal-line protection; insufficient for battery rail clamping. |
| TPSMD17A | Same DO-218AB package, 17 V VWM, but lower PPPM (5000 W @ 10/1000 μs), VC = 27.6 V at 182 A - no AEC-Q101 data published. | Used in industrial power supplies; lacks documented automotive qualification and ISO7637-2 validation. | Acceptable for non-automotive 12 V systems requiring high surge margin but not AEC-Q101 compliance. |
Compared with SMAJ17A-E3/5BT and TPSMD17A, the SM8S17-E3/2D uniquely combines 6600 W surge capability, AEC-Q101 qualification, and ISO7637-2 validation in the thermally optimized DO-218AB package - making it the only option qualified for critical automotive load dump protection at 12 V.
Availability
SM8S17-E3/2D is available at Aetrix Electronics and suitable for automotive ECU protection, body control module power inputs, and ADAS camera power supply designs requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for SM8S17-E3/2D 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 SM8S series belongs to Vishay's PAR® (Protected Automotive Rectifier) family, engineered specifically for automotive-grade transient suppression - emphasizing thermal robustness, AEC-Q101 compliance, and ISO7637-2 load dump performance in under-hood environments.
FAQ
What is the clamping voltage of the SM8S17-E3/2D at its rated peak pulse current?
The SM8S17-E3/2D has a maximum clamping voltage (VC) of 30.5 V when subjected to its rated peak pulse current (IPPM) of 216 A under the 10/1000 μs waveform. This value is measured per Vishay Document #88387 and defines the upper voltage limit imposed on protected circuits during worst-case transients.
Is the SM8S17-E3/2D qualified to AEC-Q101 standards?
Yes, the SM8S17-E3/2D is explicitly AEC-Q101 qualified, as confirmed in Vishay Document #88387 (footnote "(1) AEC-Q101 qualified"). This qualification covers stress tests including high-temperature reverse bias, high-temperature operating life, and temperature cycling - validating its use in automotive powertrain and chassis applications.
What package type does the SM8S17-E3/2D use, and how is thermal management implemented?
The SM8S17-E3/2D uses the DO-218AB surface-mount package, which integrates a metal heatsink as the anode terminal (Lead 2). Thermal management relies on soldering this heatsink directly to a large PCB copper area, achieving a low junction-to-case thermal resistance of 0.90 °C/W per datasheet specifications.
Does the SM8S17-E3/2D meet ISO7637-2 requirements for automotive load dump protection?
Yes, the SM8S17-E3/2D meets ISO7637-2 surge requirements, specifically for Pulse 5a/b (load dump), as stated in its features list and validated by its 5200 W rating under the 10/10 000 μs waveform and 10 ms exponential test profile. This makes it suitable for 12 V battery line protection in passenger vehicles.
What is the maximum junction temperature rating for the SM8S17-E3/2D?
The SM8S17-E3/2D has a maximum junction temperature (TJ) rating of +175 °C, enabling reliable operation in high-temperature automotive environments such as engine compartments or near power converters. This rating is maintained across its full operating range of −55 °C to +175 °C.
SM8S17-E3/2D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- 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:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 216A
- Power - Peak Pulse:
- 6600W (6.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM8S17-E3/2D FAQ
1.How can I place an order for SM8S17-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S17-E3/2D 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 SM8S17-E3/2D reliable?
The price and inventory of SM8S17-E3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S17-E3/2D is usually 5 days.
3.What payment methods are accepted for SM8S17-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S17-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S17-E3/2D?
SM8S17-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S17-E3/2D 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 SM8S17-E3/2D?
For technical support, including SM8S17-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S17-E3/2D requirements.
6.How does Aetrix verify that SM8S17-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM8S17-E3/2D 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 SM8S17-E3/2D meets industry standards.
7.What is the process for return or replacement of SM8S17-E3/2D?
All SM8S17-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM8S17-E3/2D, 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 SM8S17-E3/2D part is unused and in its original packaging.
Return procedure for SM8S17-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S17-E3/2D Tags
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