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Vishay General Semiconductor - Diodes Division SM8S16AHE3_A/I
- Part No.:
- SM8S16AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM8S16AHE3_A/I.pdf
- Description:
- TVS DIODE 16VWM 26VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,558
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Product details
Overview
SM8S16AHE3_A/I 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 16 V stand-off voltage (VWM), 17.8–19.7 V breakdown range (VBR), 6600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for operation up to TJ = 175 °C.
For engineers reviewing the SM8S16AHE3_A/I datasheet, SM8S16AHE3_A/I pinout, SM8S16AHE3_A/I application, or SM8S16AHE3_A/I equivalent, this page delivers verified electrical specs, DO-218AB package details, thermal resistance (RθJM = 0.35 °C/W), clamping behavior (VC = 26.0 V at IPPM), and automotive-grade surge compliance per ISO7637-2.
Technical Context
The SM8S16AHE3_A/I employs passivated anisotropic rectifier technology optimized for junction stability under repetitive surge stress. Its unidirectional polarity configures the metal heatsink as the anode terminal, enabling direct mounting to chassis ground for low-inductance transient shunting.
It delivers 254 A peak pulse current (IPPM) at 10/1000 μs with 26.0 V clamping voltage, supporting robust protection against 12 V automotive load dump transients. Thermal design is enabled by RθJM = 0.35 °C/W and MSL Level 1 rating (245 °C reflow peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16.0 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level overvoltage trip threshold for 12 V battery rails. |
| VBR (min–max) | 17.8–19.7 V at IT = 5 mA - Confirmed breakdown window ensures reliable turn-on margin above VWM while avoiding false triggering. |
| VC @ IPPM | 26.0 V at 254 A (10/1000 μs) - Clamping voltage defines maximum voltage seen by protected downstream ICs during surge events. |
| PPPM (10/1000 μs) | 6600 W - Peak transient energy handling capacity sufficient for ISO7637-2 Load Dump Pulse 5a (12 V systems). |
| TJ max. | +175 °C - Enables under-hood deployment without derating in automotive engine compartments. |
| RθJM | 0.35 °C/W - Low junction-to-mount thermal resistance allows efficient heat transfer to PCB copper or external heatsink. |
| ID @ VWM | 10 μA max at 25 °C - Ultra-low leakage preserves battery life in always-on vehicle modules. |
Pinout & Package
Package: DO-218AB - Surface-mount, single-anode configuration with integral metal heatsink acting as the anode terminal; meets UL 94 V-0, RoHS-compliant, AEC-Q101 qualified, and JESD201 Class 2 whisker tested.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Metal Heatsink) | High-current surge return path | Directly soldered to large copper pour or chassis ground; provides lowest possible inductance path for transient current. |
| Cathode (Lead 1) | Protected circuit connection | Connected to sensitive electronics (e.g., MCU power rail); clamps voltage when transients exceed VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure ensures stable VBR over lifetime and temperature cycling. |
| AEC-Q101 qualification | Validated reliability for automotive applications including temperature cycling, HTRB, and surge endurance testing. |
| MSL Level 1 | Unlimited floor life and compatibility with standard 245 °C lead-free reflow profiles without baking. |
| ISO7637-2 compliance | Meets Pulse 5a (load dump) requirements for 12 V systems with defined clamping performance and survivability. |
| Low VF | Max 1.8 V forward drop at 100 A enables minimal power loss during bidirectional fault conditions (e.g., reverse battery). |
Applications
| Automotive Body Control Module (BCM) | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protects microcontroller and sensor power rails from alternator load dump surges during battery disconnection. IC Role / Device Role: Unidirectional TVS placed between battery feed and LDO input to clamp transients before regulation. Use Value: Limits voltage to ≤26.0 V during 6600 W surges, preventing damage to 3.3 V/5 V logic and analog front-ends. | Use Scenario: Shields ECU main 12 V supply from ignition coil switching noise and generator transients. IC Role / Device Role: Primary surge suppression device mounted directly at connector entry point with heatsink tied to chassis ground. Use Value: Withstands 700 A IFSM and operates reliably at TJ = 175 °C, ensuring uptime in under-hood environments. |
| ADAS Camera Power Supply | Infotainment Head Unit DC-DC Input |
Use Scenario: Guards image sensor and SerDes interface power against cable-induced transients in rear-view camera harnesses. IC Role / Device Role: Standoff-rated TVS on 12 V input rail upstream of buck converter; leverages low ID (10 μA) to minimize standby drain. Use Value: Maintains <10 μA leakage at 16 V, critical for parking-mode camera systems with strict quiescent current budgets. | Use Scenario: Suppresses load dump spikes entering head unit via fused battery line during vehicle start-stop cycles. IC Role / Device Role: High-power TVS integrated into front-end protection stage with thermal coupling to internal ground plane. Use Value: Achieves RθJM = 0.35 °C/W, enabling sustained operation without thermal shutdown during repeated 10/1000 μs surges. |
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_A/I | Same VWM/VBR/PPPM specs; HM3 suffix indicates enhanced material formulation and updated qualification per latest AEC-Q101 revision. | No functional or layout change required; identical DO-218AB package and pinout. | Select for new designs requiring latest qualification baseline and extended lifecycle support. |
| SMAJ16A | Lower PPPM (400 W vs. 6600 W); SMA package (DO-214AC) with higher RθJA (65 °C/W vs. 0.35 °C/W). | Not suitable for load dump; limited to ESD and low-energy transients in non-automotive applications. | Use only for cost-sensitive, non-automotive consumer electronics where surge energy is <500 W. |
Compared with SM8S16AHE3_A/I, SM8S16AHM3_A/I offers identical protection performance with updated manufacturing controls, while SMAJ16A lacks the thermal and surge capability needed for automotive load dump-making SM8S16AHE3_A/I the only viable choice for under-hood 12 V system protection.
Availability
SM8S16AHE3_A/I is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, ADAS camera systems, and infotainment head units requiring stable component supply across long production lifecycles.
Supply support for SM8S16AHE3_A/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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and automotive qualification.
The SM8S series is engineered specifically for high-energy automotive transient suppression, targeting 12 V and 24 V load dump protection with AEC-Q101 validation and DO-218AB thermal performance.
FAQ
What is the clamping voltage of the SM8S16AHE3_A/I at its rated peak pulse current?
The SM8S16AHE3_A/I has a maximum clamping voltage (VC) of 26.0 V when subjected to its rated peak pulse current of 254 A under the 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number 88387, Page 2) and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the SM8S16AHE3_A/I suitable for 24 V automotive systems?
No, the SM8S16AHE3_A/I is specified for 12 V nominal systems only. Its 16 V stand-off voltage (VWM) and 17.8–19.7 V breakdown range are optimized for 12 V battery architectures. For 24 V systems, Vishay recommends higher-voltage variants such as SM8S28A or SM8S33A, which provide appropriate margin above 24 V rail fluctuations.
Does the SM8S16AHE3_A/I require a heatsink for standard automotive operation?
The SM8S16AHE3_A/I uses its integral metal heatsink (anode terminal) as the primary thermal path; no external heatsink is required for typical load dump events. Its RθJM of 0.35 °C/W enables effective heat transfer to PCB copper or chassis ground. However, sustained high-duty-cycle surges may necessitate additional copper area per Vishay's thermal derating curves (Fig. 2 in Document 88387).
What does the "HE3_A/I" suffix mean in SM8S16AHE3_A/I?
The "HE3" denotes RoHS-compliant, Pb-free termination with matte tin plating and JESD201 Class 2 whisker resistance; "A" is the revision code; "I" indicates packaging in 13" diameter plastic tape and reel with anode orientation toward sprocket holes. This full suffix confirms AEC-Q101 qualification and automotive-grade process controls per Vishay's ordering table (Page 3, Document 88387).
How does the SM8S16AHE3_A/I compare to older SM8S16A variants without the HE3 suffix?
The SM8S16AHE3_A/I replaces legacy SM8S16A versions with enhanced reliability: it adds JESD201 Class 2 whisker resistance, tighter process control for VBR consistency, and updated AEC-Q101 qualification. Electrically identical, the HE3 variant ensures long-term solder joint integrity and supply chain continuity for automotive production programs.
SM8S16AHE3_A/I 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
SM8S16AHE3_A/I FAQ
1.How can I place an order for SM8S16AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S16AHE3_A/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 SM8S16AHE3_A/I reliable?
The price and inventory of SM8S16AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S16AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM8S16AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S16AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S16AHE3_A/I?
SM8S16AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S16AHE3_A/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 SM8S16AHE3_A/I?
For technical support, including SM8S16AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S16AHE3_A/I requirements.
6.How does Aetrix verify that SM8S16AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM8S16AHE3_A/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 SM8S16AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM8S16AHE3_A/I?
All SM8S16AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S16AHE3_A/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 SM8S16AHE3_A/I part is unused and in its original packaging.
Return procedure for SM8S16AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S16AHE3_A/I Tags
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