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Vishay General Semiconductor - Diodes Division SM5S16HE3/2D
- Part No.:
- SM5S16HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM5S16HE3/2D.pdf
- Description:
- TVS DIODE 16VWM 28.8VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,866
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Product details
Overview
SM5S16HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor diode in DO-218AB package, rated for 16 V stand-off voltage (VWM), 17.8–21.8 V breakdown (VBR), 28.8 V clamping at 125 A peak pulse current, 3600 W peak pulse power (10/1000 µs), and 175 °C junction temperature-designed for automotive load dump protection in engine control units and battery management systems.
For engineers reviewing the SM5S16HE3/2D datasheet, SM5S16HE3/2D pinout, SM5S16HE3/2D application, or SM5S16HE3/2D equivalent, key selection criteria include unidirectional polarity, DO-218AB thermal performance (RθJC = 1.0 °C/W), AEC-Q101 qualification, ISO7637-2 compliance, and 175 °C high-temperature operation under sustained load conditions.
Technical Context
The SM5S16HE3/2D operates as a unidirectional avalanche diode with passivated anisotropic rectifier technology, enabling stable clamping during high-energy transients. Its junction-to-case thermal resistance of 1.0 °C/W supports direct heatsink mounting via the metal cathode tab, and its 175 °C maximum junction temperature ensures reliability in under-hood automotive environments.
It delivers 3600 W peak pulse power (10/1000 µs) and 2800 W (10/10 000 µs), with clamping voltage tightly specified at 28.8 V at 125 A. The device meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing, confirming robustness for automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 17.8 V / 21.8 V - Breakdown voltage range at 5 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 28.8 V - Clamping voltage at 125 A peak pulse current; determines protected circuit voltage ceiling |
| PPPM (10/1000 µs) | 3600 W - Peak surge power handling capability; critical for ISO7637-2 load dump immunity |
| TJ max. | +175 °C - Maximum junction temperature; enables placement near hot engine components |
| Polarity | Unidirectional - Anode connected to heatsink; blocks reverse voltage until breakdown, conducts forward like rectifier |
| RθJC | 1.0 °C/W - Thermal resistance from junction to case; allows accurate thermal design when mounted to heatsink |
Pinout & Package
Package: DO-218AB - Surface-mount, single-ended, metal-cathode heatsink package with matte tin-plated leads; anode terminal is lead 1, cathode/heatsink is lead 2/metal tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode | Connected to protected line (e.g., battery rail); current flows into device during clamping |
| Lead 2 / Metal Heatsink Tab | Cathode | Primary thermal path and electrical return; must be soldered to copper pour or heatsink for thermal and electrical integrity |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier technology ensures stable VBR over lifetime and temperature cycling |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and HAST testing per stress requirements |
| ISO7637-2 compliance | Meets load dump surge immunity up to 35 V, 100 ms exponential waveform per automotive standard |
| MSL Level 1 rating | Reflow-compatible up to 245 °C peak without moisture-induced damage |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal/humidity stress, ensuring long-term solder joint integrity |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Battery Management System (BMS) |
|---|---|
Use Scenario: Protects ECU microcontroller and CAN transceivers from 12 V battery rail transients caused by alternator load dump and inductive switching. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamps surge energy to ≤28.8 V while diverting >125 A away from downstream ICs. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic supplies and communication interfaces during ISO7637-2 Pulse 5a events. | Use Scenario: Shields BMS analog front-end (AFE) and cell monitoring ICs from voltage spikes during battery disconnect/reconnect and relay switching. IC Role / Device Role / Timing Role: Fast-response avalanche diode absorbs 3600 W surges within nanoseconds, maintaining safe bus voltage during fault conditions. Use Value: Enables reliable cell voltage measurement accuracy and prevents false overvoltage trips in high-voltage EV/HEV battery packs. |
| Start-Stop System Voltage Regulator Protection | Automotive Lighting Module Driver Circuit |
Use Scenario: Safeguards start-stop system DC/DC converters and MOSFET gate drivers from repeated low-energy transients during frequent engine restarts. IC Role / Device Role / Timing Role: Unidirectional clamping device with low leakage (<10 µA at 16 V) minimizes quiescent current drain in always-on circuits. Use Value: Extends battery life and maintains system readiness across 100,000+ stop-start cycles without degradation. | Use Scenario: Protects LED driver ICs and current-sense resistors in headlamp modules from inductive kickback generated by high-current LED string switching. IC Role / Device Role / Timing Role: DO-218AB package provides low-inductance path to heatsink, enabling sub-100 ns response to fast-rising transients. Use Value: Eliminates LED flicker and driver IC failure during PWM dimming and thermal cycling in ambient temperatures up to +125 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A-E3/5AT | DO-214AC package; lower PPPM (400 W); VBR = 17.8–19.7 V; RθJC ≈ 50 °C/W | Limited to low-energy transients; unsuitable for ISO7637-2 load dump | Select only for non-automotive, low-power board-level ESD where thermal mass is insufficient for DO-218AB mounting |
| SMCJ16AHE3_A/H | DO-214AB package; PPPM = 1500 W; VBR = 17.8–19.7 V; TJ max. = 150 °C | Lower surge rating and temperature limit; not AEC-Q101 qualified | Acceptable for industrial power supplies requiring basic IEC61000-4-5 protection but not automotive qualification |
Compared with SMAJ16A-E3/5AT and SMCJ16AHE3_A/H, the SM5S16HE3/2D delivers 2.4× higher peak power, 25 °C higher junction rating, and certified AEC-Q101 reliability-making it the only option among the three qualified for under-hood automotive load dump protection with direct heatsink coupling.
Availability
SM5S16HE3/2D is available at Aetrix Electronics and suitable for automotive electronics, battery management systems, and engine control units requiring stable component supply, AEC-Q101 compliance, and high-temperature surge resilience.
Supply support for SM5S16HE3/2D 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 diodes, rectifiers, and protection devices with emphasis on automotive, industrial, and computing applications.
The SM5S series is designed specifically for high-reliability automotive transient suppression, combining DO-218AB thermal efficiency, AEC-Q101 validation, and ISO7637-2 compliance to meet stringent under-hood environmental demands.
FAQ
What is the clamping voltage of the SM5S16HE3/2D at its rated peak pulse current?
The SM5S16HE3/2D has a maximum clamping voltage (VC) of 28.8 V at 125 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per the datasheet's electrical characteristics table and defines the upper voltage limit imposed on protected circuitry during surge events. The SM5S16HE3/2D maintains this clamping performance across its full operating temperature range, supporting robust design margin for 12 V automotive systems.
Is the SM5S16HE3/2D qualified for automotive applications?
Yes, the SM5S16HE3/2D is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO7637-2 load dump requirements, operates up to +175 °C junction temperature, and passes JESD201 Class 2 whisker testing and MSL Level 1 reflow standards. These qualifications are documented in Vishay's official datasheet 88382 and confirm the SM5S16HE3/2D's suitability for engine control units, battery management systems, and other under-hood automotive electronics.
What does the "HE3/2D" suffix indicate in SM5S16HE3/2D?
The "HE3" suffix denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads and JESD201 Class 2 whisker resistance. The "/2D" indicates packaging in 13-inch plastic tape and reel, with 750 units per reel and anode orientation toward the sprocket hole. This packaging format ensures compatibility with high-speed pick-and-place equipment and supports automated SMT assembly of the SM5S16HE3/2D in volume production.
How does the DO-218AB package of the SM5S16HE3/2D improve thermal performance compared to DO-214AB?
The DO-218AB package of the SM5S16HE3/2D features an integrated metal heatsink tab that reduces junction-to-case thermal resistance to 1.0 °C/W-approximately 5× lower than typical DO-214AB packages (~50 °C/W). This enables efficient heat transfer directly to PCB copper pours or external heatsinks, sustaining higher surge duty cycles and improving long-term reliability in high-temperature automotive environments where the SM5S16HE3/2D is deployed.
Can the SM5S16HE3/2D be used in bidirectional protection circuits?
No, the SM5S16HE3/2D is unidirectional only, with polarity defined as anode (lead 1) and cathode/heatsink (lead 2). It blocks reverse voltage up to 16 V and clamps positive transients on the anode side. For bidirectional protection, a separate device such as the SMBJ16CA or a back-to-back SM5S16HE3/2D configuration would be required-but the SM5S16HE3/2D itself does not provide symmetrical clamping behavior.
SM5S16HE3/2D 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 125A
- 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
SM5S16HE3/2D FAQ
1.How can I place an order for SM5S16HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S16HE3/2D 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 SM5S16HE3/2D reliable?
The price and inventory of SM5S16HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S16HE3/2D is usually 5 days.
3.What payment methods are accepted for SM5S16HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S16HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S16HE3/2D?
SM5S16HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S16HE3/2D 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 SM5S16HE3/2D?
For technical support, including SM5S16HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S16HE3/2D requirements.
6.How does Aetrix verify that SM5S16HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM5S16HE3/2D 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 SM5S16HE3/2D meets industry standards.
7.What is the process for return or replacement of SM5S16HE3/2D?
All SM5S16HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM5S16HE3/2D, 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 SM5S16HE3/2D part is unused and in its original packaging.
Return procedure for SM5S16HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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