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Vishay General Semiconductor - Diodes Division SM8S16A-71HE4_A/J
- Part No.:
- SM8S16A-71HE4_A/J
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S16A-71HE4_A/J.pdf
- Description:
- TVS DIODE 16VWM DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,012
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Product details
Overview
SM8S16A-71HE4_A/J from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in DO-218AB package, rated for 16 V stand-off voltage (VWM), 17.8–19.7 V breakdown (VBR), 6600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive load dump protection.
For engineers reviewing the SM8S16A-71HE4_A/J datasheet, SM8S16A-71HE4_A/J pinout, SM8S16A-71HE4_A/J application, or SM8S16A-71HE4_A/J equivalent, key selection criteria include clamping voltage (26.0 V at IPPM), TJ = 175 °C operation, low leakage (<10 μA at VWM), and ISO7637-2 compliance for harsh automotive transients.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver high surge robustness with low forward voltage drop (≤1.8 V at 100 A) and stable junction temperature performance up to 175 °C. Its unidirectional polarity and heatsink-anode configuration enable direct mounting to thermal planes in high-power automotive electronics.
The device meets MSL Level 1 per J-STD-020 (245 °C peak reflow), supports 700 A IFSM (8.3 ms half-sine), and exhibits 0.081 %/°C VBR temperature coefficient - enabling predictable clamping behavior across wide ambient and junction temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/typ/max) | 17.8 / 18.8 / 19.7 V at 5 mA - precise breakdown threshold ensures reliable overvoltage triggering |
| VC @ IPPM | 26.0 V - clamping voltage limits downstream IC stress during 6600 W transient events |
| PPPM (10/1000 μs) | 6600 W - enables protection against severe load dump surges per ISO7637-2 |
| ID @ VWM | <10 μA - minimal leakage preserves battery life in always-on automotive modules |
| TJ max. | +175 °C - supports under-hood placement without derating in engine control units |
| RθJM | 0.35 °C/W - low junction-to-mount thermal resistance allows efficient heat transfer to PCB copper pour or heatsink |
Pinout & Package
Package: DO-218AB - thermally enhanced surface-mount case with metal heatsink terminal (anode), matte tin-plated leads, UL 94 V-0 molding compound, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Positive terminal / thermal interface | Directly bonded to PCB copper pour or external heatsink; serves as primary thermal path and current return |
| Cathode | Transient current sink | Connected to protected line (e.g., 12 V rail); conducts surge current to anode/heatsink during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JEDEC standards |
| Junction passivation | Optimized anisotropic rectifier structure reduces leakage drift and improves long-term stability at 175 °C |
| ISO7637-2 compliance | Withstands load dump pulses up to 10 ms exponential waveform without degradation |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 245 °C peak, eliminating moisture sensitivity concerns |
| Low VF (≤1.8 V) | Minimizes conduction loss and self-heating during high-current surge events |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) CAN Bus Power Rail |
|---|---|
Use Scenario: Protects 12 V supply input of engine control units exposed to alternator load dump transients up to 35 V for 400 ms. IC Role / Device Role / Timing Role: Unidirectional TVS clamps surge energy to safe levels within nanoseconds, diverting >250 A peak current away from DC-DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V logic rails by limiting clamped voltage to 26.0 V while sustaining 6600 W peak power. | Use Scenario: Shields 12 V power rail feeding isolated CAN transceivers and microcontrollers in body control modules. IC Role / Device Role / Timing Role: Acts as first-line transient suppressor on main power input, absorbing coupled noise from window motors, seat actuators, and lighting loads. Use Value: Maintains <10 μA leakage at 16 V to avoid parasitic drain on vehicle battery during sleep mode, critical for low-power BCM operation. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Supply | Electric Power Steering (EPS) Motor Driver Board |
Use Scenario: Secures 12 V input to image sensor modules and ISP processors in rear-view and surround-view cameras mounted near engine compartments. IC Role / Device Role / Timing Role: Provides fast-response clamping (tR ≤ 1 ns) to suppress ignition noise and alternator ripple-induced spikes before they reach sensitive analog front-ends. Use Value: Enables reliable operation at TJ = 175 °C ambient, meeting ASIL-B thermal requirements without forced cooling or layout derating. | Use Scenario: Protects high-current gate drivers and MCU power supplies on EPS motor control boards subject to inductive switching transients from 3-phase H-bridge. IC Role / Device Role / Timing Role: Absorbs repetitive 700 A IFSM-rated surges from MOSFET turn-off, preventing voltage overshoot beyond 26.0 V at the driver IC supply pins. Use Value: Leverages RθJM = 0.35 °C/W to dissipate 8 W continuously into copper heatsink, eliminating need for additional thermal vias or thermal pads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM8S16AHM3 | Same VWM/VBR/PPPM specs; HM3 suffix indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified per updated material spec | No change in circuit function or layout; identical DO-218AB footprint and thermal profile | Preferred for new designs due to updated environmental compliance and extended product lifecycle |
| SMAJ16A | Lower PPPM (400 W), smaller SMA package (RθJA = 110 °C/W), no AEC-Q101 qualification | Limited to non-automotive, lower-energy transients; unsuitable for load dump or under-hood use | Only acceptable for cost-sensitive industrial controls where 175 °C operation and ISO7637-2 are not required |
Compared with SM8S16A-71HE4_A/J, SM8S16AHM3 offers identical electrical and thermal performance with enhanced environmental compliance, while SMAJ16A provides basic TVS functionality at reduced surge capability and reliability - making it unsuitable for automotive deployment.
Availability
SM8S16A-71HE4_A/J 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 and long-term lifecycle support.
Supply support for SM8S16A-71HE4_A/J 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, TVS devices, and optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The SM8SxxA series was designed specifically for high-energy automotive transient suppression, targeting load dump, ISO7637-2, and ISO16750-2 compliance in demanding under-hood environments.
FAQ
What is the clamping voltage of the SM8S16A-71HE4_A/J at its rated peak pulse current?
The SM8S16A-71HE4_A/J has a maximum clamping voltage (VC) of 26.0 V when subjected to its peak pulse current (IPPM) under the 10/1000 μs waveform condition. This value is measured at the specified IPPM derived from its 6600 W rating and ensures downstream components remain below destructive voltage thresholds during automotive load dump events. The SM8S16A-71HE4_A/J maintains this clamping performance across its full operating temperature range.
Is the SM8S16A-71HE4_A/J suitable for new automotive designs?
No - the SM8S16A-71HE4_A/J is marked "Not For New Designs" in Vishay's official documentation, with SM8S16AHM3 recommended as the qualified replacement. While SM8S16A-71HE4_A/J remains available for legacy production and repair, new designs should use SM8S16AHM3 to ensure continued supply, updated material compliance (halogen-free), and aligned lifecycle support. The SM8S16A-71HE4_A/J retains full AEC-Q101 qualification and identical electrical specs.
What is the thermal resistance from junction to mount (RθJM) for the SM8S16A-71HE4_A/J?
The SM8S16A-71HE4_A/J has a typical junction-to-mount thermal resistance (RθJM) of 0.35 °C/W, measured using the Transient Dual Interface Method (JEDEC®51-14). This low value reflects the DO-218AB package's integrated metal heatsink terminal, enabling efficient heat transfer directly to PCB copper pours or external heatsinks - a critical advantage for high-power automotive applications where ambient temperatures exceed 125 °C. The SM8S16A-71HE4_A/J leverages this to sustain 8 W continuous dissipation.
Does the SM8S16A-71HE4_A/J meet ISO7637-2 requirements?
Yes - the SM8S16A-71HE4_A/J is explicitly stated in Vishay's datasheet to meet ISO7637-2 surge specifications, validated across multiple test conditions including Pulse 1, Pulse 2a, Pulse 3a/b, and Load Dump (Pulse 5a). Its 6600 W peak pulse power rating and 10 ms exponential waveform capability align directly with ISO7637-2 Pulse 5a requirements for 12 V systems. The SM8S16A-71HE4_A/J achieves this while maintaining clamping below 26.0 V.
What is the polarity configuration and terminal identification for the SM8S16A-71HE4_A/J?
The SM8S16A-71HE4_A/J is unidirectional with the metal heatsink serving as the anode terminal and the molded cathode lead as the cathode. Polarity is marked on the device body with a band indicating the cathode end. During PCB layout, the anode must be connected to system ground or chassis, while the cathode connects to the protected line - reversing polarity would prevent proper clamping operation. This configuration is fixed and confirmed for the SM8S16A-71HE4_A/J in all Vishay documentation.
SM8S16A-71HE4_A/J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 254A
- Power - Peak Pulse:
- 6600W (6.6kW)
- 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
SM8S16A-71HE4_A/J FAQ
1.How can I place an order for SM8S16A-71HE4_A/J through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S16A-71HE4_A/J 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 SM8S16A-71HE4_A/J reliable?
The price and inventory of SM8S16A-71HE4_A/J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S16A-71HE4_A/J is usually 5 days.
3.What payment methods are accepted for SM8S16A-71HE4_A/J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S16A-71HE4_A/J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S16A-71HE4_A/J?
SM8S16A-71HE4_A/J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S16A-71HE4_A/J 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 SM8S16A-71HE4_A/J?
For technical support, including SM8S16A-71HE4_A/J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S16A-71HE4_A/J requirements.
6.How does Aetrix verify that SM8S16A-71HE4_A/J is sourced from the original manufacturer or authorized distributors?
All SM8S16A-71HE4_A/J 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 SM8S16A-71HE4_A/J meets industry standards.
7.What is the process for return or replacement of SM8S16A-71HE4_A/J?
All SM8S16A-71HE4_A/J units undergo pre-shipment inspection (PSI). If there is an issue with SM8S16A-71HE4_A/J, 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 SM8S16A-71HE4_A/J part is unused and in its original packaging.
Return procedure for SM8S16A-71HE4_A/J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S16A-71HE4_A/J Tags
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