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Vishay General Semiconductor - Diodes Division SM5S16ATHE3/I
- Part No.:
- SM5S16ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S16ATHE3/I.pdf
- Description:
- TVS DIODE 16VWM 26VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,926
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Product details
Overview
SM5S16ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AC package, rated for 16 V stand-off voltage (VWM), 17.8–19.7 V breakdown (VBR), 138 V clamping at 150 A peak pulse current, 3600 W peak pulse power (10/1000 μs), and 175 °C junction operation-designed for automotive load dump protection in engine control units and body electronics.
For engineers reviewing the SM5S16ATHE3/I datasheet, SM5S16ATHE3/I pinout, SM5S16ATHE3/I application, or SM5S16ATHE3/I equivalent, key selection criteria include unidirectional polarity, DO-218AC thermal performance (RθJC = 1.0 °C/W), AEC-Q101 qualification, ISO7637-2 compliance, and 175 °C TJ max rating for under-hood automotive environments.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under high-temperature transients. Its heatsink-is-anode construction enables efficient thermal transfer to PCB copper, supporting sustained 5 W power dissipation on infinite heatsink at TC = 25 °C.
The device meets MSL Level 1 per J-STD-020 with 245 °C reflow peak, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and passes JESD 201 Class 2 whisker testing-ensuring robust solderability and long-term reliability in automotive production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/typ/max) | 17.8 / 18.8 / 19.7 V at 5 mA - Confirmed breakdown threshold for reliable turn-on during transients |
| VC @ IPPM | 138 V at 150 A (10/1000 μs) - Clamping voltage limiting downstream IC stress during surge events |
| PPPM (10/1000 μs) | 3600 W - Peak surge energy handling capacity for load dump and inductive switching |
| TJ max | +175 °C - Enables placement near high-heat sources like powertrain ECUs without derating |
| RθJC | 1.0 °C/W - Low thermal resistance from junction to case supports direct heatsink mounting |
| Polarity | Unidirectional - Anode connected to heatsink; cathode as signal terminal for standard load dump topology |
Pinout & Package
Package: DO-218AC - Surface-mount, thermally enhanced plastic case with integral metal heatsink; anode terminal is the metal heatsink tab (Lead 2), cathode is Lead 1; UL 94 V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Signal-side connection; carries transient current into device during clamping |
| Lead 2 / Metal Heatsink | Anode | Primary thermal path and ground reference; must be soldered to large copper pour for RθJC optimization |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift < ±0.081 %/°C across temperature, critical for precision clamping in wide ambient ranges |
| TJ = 175 °C capability | Supports direct placement in high-heat zones (e.g., near ignition coils or DC-DC converters) without external derating |
| Meets ISO7637-2 surge specification | Validated for Pulse 5a (load dump) up to 35 V test voltage, ensuring system-level EMC compliance |
| AEC-Q101 qualified (HE3 suffix) | Qualified for automotive-grade reliability including HTOL, TCT, and HAST-required for Tier 1 ECU BOMs |
| MSL Level 1, 245 °C peak reflow | Compatible with standard lead-free SMT assembly lines without moisture sensitivity concerns |
Applications
| Engine Control Unit (ECU) Protection | Body Control Module (BCM) Power Input |
|---|---|
Use Scenario: Protects microcontroller power rails from 12 V battery line transients during alternator load dump (ISO7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamps reverse-biased surges above 16 V while maintaining low leakage (<10 μA) during normal operation. Use Value: Limits clamping voltage to 138 V at 150 A, preventing damage to 36 V-rated input regulators and CAN transceivers. | Use Scenario: Shields BCM power inputs from inductive switching spikes generated by door lock actuators and window lift motors. IC Role / Device Role / Timing Role: Fast-response transient suppressor absorbing 3600 W surges within nanoseconds to prevent latch-up in PMICs and MCU IOs. Use Value: Delivers 175 °C operation and AEC-Q101 qualification, enabling use in sealed, non-ventilated BCM enclosures. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Stage |
Use Scenario: Safeguards 5 V/3.3 V camera module supplies against battery line coupling noise during start-stop cycling. IC Role / Device Role / Timing Role: Standoff voltage of 16 V ensures no conduction during nominal 13.5–14.5 V battery operation; activates only during overvoltage events. Use Value: Low forward voltage drop (<2.0 V at 100 A) minimizes power loss during clamping, reducing thermal stress on adjacent image sensors. | Use Scenario: Protects gate drivers and current sense amplifiers from flyback voltage spikes during MOSFET commutation in EPS H-bridge circuits. IC Role / Device Role / Timing Role: DO-218AC package provides low-inductance path and direct heatsink coupling to dissipate 2800 W (10/10,000 μs) surges. Use Value: RθJC = 1.0 °C/W enables effective thermal management without additional heatsinks-critical for compact EPS motor control boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S16AHM3 | Same electrical specs; HM3 suffix indicates halogen-free, RoHS-compliant molding compound (vs. HE3's standard RoHS) | No functional difference; HM3 used where halogen-free compliance is mandated by OEM spec | Select HM3 when material declaration requires halogen-free certification; otherwise HE3 remains valid for AEC-Q101 systems |
| SMAJ16A | Lower PPPM (400 W vs. 3600 W); SMA package (RθJC ≈ 40 °C/W vs. 1.0 °C/W); no AEC-Q101 qualification | Not suitable for load dump; limited to low-energy ESD/surge in non-automotive consumer or industrial apps | Only consider for cost-sensitive, non-automotive designs with <500 W surge requirements and no high-temp or qualification needs |
Compared with SM5S16AHM3, SM5S16ATHE3/I offers identical electrical performance and AEC-Q101 qualification but differs in halogen content compliance; versus SMAJ16A, it delivers 9× higher surge power, 40× better thermal resistance, and automotive-grade reliability-making it irreplaceable for load dump-critical systems.
Availability
SM5S16ATHE3/I is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, and ADAS camera power supplies requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SM5S16ATHE3/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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with leadership in high-reliability power and protection devices.
The SM5SxxAT family was engineered specifically for automotive load dump and inductive switching protection, combining high-temperature silicon design, thermally optimized packaging, and AEC-Q101 validation to meet stringent OEM power rail survivability requirements.
FAQ
What does the "HE3" suffix mean in SM5S16ATHE3/I?
The HE3 suffix in SM5S16ATHE3/I denotes RoHS-compliant construction with matte tin-plated leads, JESD 22-B102 solderability, and JESD 201 Class 2 whisker resistance. It also signifies AEC-Q101 qualification-confirming suitability for automotive applications per Vishay's qualification report referenced in Document Number 87609. SM5S16ATHE3/I is not a generic variant; this suffix defines its automotive reliability grade and assembly compatibility.
Is SM5S16ATHE3/I suitable for bidirectional transient protection?
No, SM5S16ATHE3/I is unidirectional only, with anode assigned to the metal heatsink and cathode to Lead 1. It conducts only during positive transients relative to the anode. For bidirectional protection, Vishay offers separate part families such as SMBJxxCA; using SM5S16ATHE3/I in reverse-biased configurations will not provide clamping and may result in catastrophic failure. Always observe polarity marking on the DO-218AC package.
How does SM5S16ATHE3/I perform under high-temperature operating conditions?
SM5S16ATHE3/I maintains full functionality up to TJ = +175 °C, with VBR shift calculated via αT = 0.081 %/°C. At 150 °C junction temperature, VBR increases by ~10.1% over 25 °C value-still within 17.8–19.7 V range. Its RθJC = 1.0 °C/W and DO-218AC package enable effective heat transfer to PCB copper, allowing sustained operation in under-hood environments where ambient exceeds 125 °C.
Does SM5S16ATHE3/I meet ISO7637-2 Pulse 5a requirements?
Yes, SM5S16ATHE3/I is validated to meet ISO7637-2 Pulse 5a (load dump) under specified test conditions, as stated in the "Typical Applications" and "Features" sections of Document Number 87609. Its 3600 W peak pulse power (10/1000 μs) and 138 V clamping at 150 A ensure compliance when properly mounted on ≥1 in² 2-oz copper with thermal vias-no additional external components required for basic load dump immunity.
What is the recommended PCB layout for optimal thermal performance of SM5S16ATHE3/I?
For optimal thermal performance, the metal heatsink (anode/Lead 2) of SM5S16ATHE3/I must be soldered to a minimum 1 in² (645 mm²) area of 2-oz copper with ≥6 thermal vias (0.3 mm diameter, spaced ≤2 mm apart) connecting to inner or backside ground planes. Lead 1 (cathode) requires standard 0.25 mm trace width. Avoid solder mask over heatsink pad-exposed copper improves convection and conduction. Mounting per Figure 4 in Document Number 87609 ensures RθJC ≤ 1.0 °C/W.
SM5S16ATHE3/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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 138A
- 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-218AC
SM5S16ATHE3/I FAQ
1.How can I place an order for SM5S16ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S16ATHE3/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 SM5S16ATHE3/I reliable?
The price and inventory of SM5S16ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S16ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM5S16ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S16ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S16ATHE3/I?
SM5S16ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S16ATHE3/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 SM5S16ATHE3/I?
For technical support, including SM5S16ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S16ATHE3/I requirements.
6.How does Aetrix verify that SM5S16ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM5S16ATHE3/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 SM5S16ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM5S16ATHE3/I?
All SM5S16ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S16ATHE3/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 SM5S16ATHE3/I part is unused and in its original packaging.
Return procedure for SM5S16ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S16ATHE3/I Tags
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