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Vishay General Semiconductor - Diodes Division SM5S17HE3/2D
- Part No.:
- SM5S17HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S17HE3/2D.pdf
- Description:
- TVS DIODE 17VWM 30.5VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,058
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Product details
Overview
SM5S17HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in high-reliability 12 V systems. It features a 17.0 V stand-off voltage (VWM), 18.9–23.1 V breakdown range (VBR), 30.5 V clamping voltage at 118 A peak pulse current, 3600 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM5S17HE3/2D datasheet, SM5S17HE3/2D pinout, SM5S17HE3/2D application, or SM5S17HE3/2D equivalent, this page delivers verified electrical specs, DO-218AB package details, thermal resistance (RθJC = 1.0 °C/W), junction temperature rating up to +175 °C, and automotive-grade surge compliance per ISO7637-2.
Technical Context
The SM5S17HE3/2D employs passivated anisotropic rectifier technology optimized for high-temperature stability and low leakage (<10 µA at VWM). Its unidirectional polarity configures the metal heatsink as the anode, enabling direct mounting to PCB ground planes for efficient thermal dissipation.
It delivers 3600 W peak pulse power under 10/1000 µs waveform and sustains 2800 W under 10/10 000 µs, with a maximum forward surge current of 500 A (8.3 ms half-sine). The device operates across -55 °C to +175 °C and meets MSL Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 18.9 V / 23.1 V - Breakdown voltage range at 5 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 30.5 V - Clamping voltage at 118 A peak pulse current; limits downstream voltage stress |
| PPPM (10/1000 µs) | 3600 W - Peak surge power handling capability for short-duration transients |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance; enables effective heat transfer to heatsink or copper plane |
| TJ max. | +175 °C - Maximum junction temperature; supports under-hood automotive placement |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: DO-218AB - Surface-mount, thermally enhanced case with metal heatsink acting as anode terminal; RoHS-compliant matte tin-plated leads; UL 94 V-0 molding compound; JEDEC MSL Level 1 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Signal-side connection; carries transient current into the device during clamping |
| Metal Heatsink | Anode | Primary thermal path and electrical return; must be soldered to large copper area for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR and low leakage over lifetime and temperature |
| High-temperature operation | Rated for continuous operation up to +175 °C junction temperature, supporting engine compartment deployment |
| Automotive surge compliance | Validated against ISO7637-2 load dump waveforms, enabling use without additional external filtering |
| Low clamping ratio | VC/VBR ≈ 1.32 - Minimizes overvoltage margin while maintaining robust surge margin |
| MSL Level 1 | Reflow-compatible up to 245 °C peak; no floor life limitation or baking required prior to assembly |
Applications
| Automotive Load Dump Protection | 12 V Power Rail Surge Suppression |
|---|---|
Use Scenario: Protecting ECUs, body control modules, and infotainment systems from alternator-induced load dump transients (up to 40 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and protected IC input, clamping excess energy to ground via heatsink. Use Value: Limits voltage to ≤30.5 V during 3600 W surges, preventing latch-up or gate oxide damage in downstream regulators and microcontrollers. |
Use Scenario: Safeguarding DC-DC converters and CAN transceivers on shared 12 V distribution networks exposed to switching noise and relay bounce. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing sub-millisecond spikes before they propagate to sensitive analog or digital circuitry. Use Value: Achieves <10 ns response time and maintains <10 µA leakage at 17 V, preserving quiescent current budgets in always-on modules. |
| Industrial Motor Drive Control | Heavy-Duty Truck Electrical Systems |
Use Scenario: Shielding motor driver gate drivers and current sense amplifiers from inductive kickback generated by solenoid valves and brushed DC motors. IC Role / Device Role / Timing Role: High-surge-capable TVS mounted directly at power entry point, diverting >100 A transients away from signal conditioning paths. Use Value: Withstands 500 A single-half-sine surge (8.3 ms), eliminating need for series impedance or secondary protection stages. |
Use Scenario: Hardening telematics units and fleet management controllers against harsh 24 V system transients, including double-battery jump starts and generator regulation faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp in front-end protection network, coordinated with upstream fuses and downstream LC filters. Use Value: Maintains clamping performance at TJ = +175 °C, ensuring reliability in sealed enclosures with minimal airflow. |
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-E3/57T | DO-214AC (SMA) package; lower PPPM = 400 W; VC = 27.6 V at 14.3 A | Lower surge capacity suits consumer-grade 12 V supplies, not automotive load dump | Select when cost-sensitive, non-AEC-Q101 designs require basic transient suppression with smaller footprint |
| 1.5KE18A | Through-hole DO-201 package; PPPM = 1500 W; VC = 27.7 V at 54.2 A; no AEC-Q101 qualification | Limited thermal performance and no automotive qualification restrict use to industrial bench equipment | Choose only for prototyping or legacy through-hole designs where rework tolerance outweighs surge margin needs |
Compared with SMAJ17A-E3/57T and 1.5KE18A, the SM5S17HE3/2D provides 9× higher peak power, AEC-Q101 validation, and DO-218AB thermal efficiency-making it the sole option qualified for production automotive load dump protection where sustained 3600 W clamping and +175 °C operation are mandatory.
Availability
SM5S17HE3/2D is available at Aetrix Electronics and suitable for automotive electronic control units, 12 V DC-DC converter front ends, and industrial motor drive interfaces requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-compliant sourcing.
Supply support for SM5S17HE3/2D 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, and optoelectronics for automotive, industrial, and computing markets.
The SM5Sxx family was engineered specifically for automotive load dump and ISO7637-2 transient suppression, leveraging passivated junction technology to deliver stable clamping performance across extreme temperature and surge conditions.
FAQ
What is the clamping voltage of the SM5S17HE3/2D at its rated peak pulse current?
The SM5S17HE3/2D has a maximum clamping voltage (VC) of 30.5 V when subjected to its specified peak pulse current of 118 A under a 10/1000 µs waveform. This value is measured per the test conditions defined in Vishay's Document Number 88382 and ensures predictable overvoltage limiting for downstream 3.3 V or 5 V logic rails protected by the SM5S17HE3/2D.
Is the SM5S17HE3/2D suitable for bidirectional transient suppression?
No, the SM5S17HE3/2D is unidirectional only-the metal heatsink serves as the anode, and Lead 1 is the cathode. It conducts only during positive transients on the cathode side relative to the heatsink. For bidirectional protection, a separate device such as the SMBJ17CA or a back-to-back configuration would be required; the SM5S17HE3/2D itself does not support reverse-polarity surge suppression.
How is thermal management implemented for the SM5S17HE3/2D in high-power applications?
Thermal management for the SM5S17HE3/2D relies on soldering its metal heatsink directly to a large copper pour or dedicated thermal pad on the PCB. With RθJC = 1.0 °C/W, effective heat spreading reduces junction temperature rise during repeated 3600 W surges. Layout must avoid thermal isolation-minimum 200 mm² of 2 oz copper connected to the heatsink is recommended for sustained operation near TJ = +175 °C.
Does the SM5S17HE3/2D meet AEC-Q101 requirements for automotive use?
Yes, the SM5S17HE3/2D is explicitly AEC-Q101 qualified, as confirmed in Vishay's datasheet revision 22-Jul-16 (Document Number 88382). Qualification includes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge-ensuring reliability in automotive under-hood environments where the SM5S17HE3/2D is deployed for load dump protection.
What is the meaning of the "HE3/2D" suffix in SM5S17HE3/2D?
The "HE3" suffix indicates RoHS-compliant construction and AEC-Q101 qualification; "2D" denotes the preferred packaging code for 13-inch plastic tape-and-reel delivery with 750 units per reel and anode orientation toward the sprocket hole. This packaging format ensures automated placement compatibility and traceable lot control for the SM5S17HE3/2D in high-volume automotive manufacturing.
SM5S17HE3/2D 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):
- 118A
- Power - Peak Pulse:
- 3600W (3.6kW)
- 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-218AB
SM5S17HE3/2D FAQ
1.How can I place an order for SM5S17HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S17HE3/2D 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 SM5S17HE3/2D reliable?
The price and inventory of SM5S17HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S17HE3/2D is usually 5 days.
3.What payment methods are accepted for SM5S17HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S17HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S17HE3/2D?
SM5S17HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S17HE3/2D 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 SM5S17HE3/2D?
For technical support, including SM5S17HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S17HE3/2D requirements.
6.How does Aetrix verify that SM5S17HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S17HE3/2D 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 SM5S17HE3/2D meets industry standards.
7.What is the process for return or replacement of SM5S17HE3/2D?
All SM5S17HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S17HE3/2D, 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 SM5S17HE3/2D part is unused and in its original packaging.
Return procedure for SM5S17HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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