My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM8S16ATHE3/I
- Part No.:
- SM8S16ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM8S16ATHE3/I.pdf
- Description:
- TVS DIODE 16VWM 26VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:172
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM8S16ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 17.8–19.7 V breakdown voltage (VBR), 6600 W peak pulse power (10/1000 μs), 26.0 V clamping voltage at rated surge current, 16.0 V stand-off voltage (VWM), and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the SM8S16ATHE3/I datasheet, SM8S16ATHE3/I pinout, SM8S16ATHE3/I application, or SM8S16ATHE3/I equivalent, this device is selected for high-reliability 12 V automotive power rail protection where junction temperature up to +175 °C, low leakage (<10 μA at VWM), and ISO 7637-2 compliance are required.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping performance across -55 °C to +175 °C operating range. Its DO-218AC package integrates a metal heatsink as the anode terminal, enabling direct thermal coupling to PCB copper for sustained 8 W power dissipation at TC = 25 °C.
The device is optimized for unidirectional surge suppression in 12 V systems, with verified 700 A non-repetitive forward surge capability (8.3 ms half-sine) and 254 A peak pulse current (10/1000 μs). Its 0.90 °C/W junction-to-case thermal resistance supports robust thermal management in high-power transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.8 / 18.8 / 19.7 V - defines reliable conduction onset during overvoltage events |
| VWM | 16.0 V - maximum continuous reverse operating voltage without significant leakage |
| VC @ IPPM | 26.0 V - clamped voltage during 254 A 10/1000 μs surge, limiting downstream stress |
| PPPM (10/1000 μs) | 6600 W - peak transient energy handling capacity for load dump surges |
| TJ max | +175 °C - enables placement near hot engine control units without derating |
| AEC-Q101 qualified | Yes - validated for automotive-grade reliability per stress test requirements |
| Package | DO-218AC - thermally enhanced case with integrated metal heatsink (anode) |
Pinout & Package
DO-218AC package with two terminals: Lead 1 (cathode) and Lead 2/metal heatsink (anode). The metal base serves as both electrical anode and primary thermal path to PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; carries surge current into device during clamping |
| Lead 2 / Metal Heatsink | Anode | Primary thermal interface and electrical return; must be soldered to large copper area for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process ensures stable VBR drift <0.081 %/°C over temperature |
| High-temperature operation | Rated for continuous use at TJ = +175 °C - eliminates derating in under-hood environments |
| Low leakage | <10 μA at VWM = 16.0 V and TJ = 175 °C - prevents battery drain in always-on modules |
| ISO 7637-2 compliance | Validated against load dump waveforms (test condition dependent) - meets OEM system-level surge requirements |
| MSL Level 1 | Reflow capable up to 245 °C peak - supports standard SMT assembly without moisture sensitivity concerns |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) Battery Line Protection |
|---|---|
|
Use Scenario: Protects ECU 12 V input from alternator load dump transients during battery disconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS clamps surge within 1 ns to limit voltage to ≤26.0 V at 254 A. Use Value: Prevents damage to downstream DC/DC converters and microcontrollers by absorbing 6600 W peak energy without degradation. |
Use Scenario: Shields BCM power rail from ISO 7637-2 Pulse 5a/b surges in vehicle body electronics. IC Role / Device Role / Timing Role: Acts as primary overvoltage clamp on fused battery feed, with anode tied to chassis ground plane. Use Value: Maintains <10 μA leakage at 16.0 V even at +175 °C, ensuring low quiescent current in sleep-mode systems. |
| ADAS Camera Module Power Protection | Electric Power Steering (EPS) ECU Protection |
|
Use Scenario: Safeguards image sensor and ISP power supplies against coupled transients from nearby motor drivers. IC Role / Device Role / Timing Role: Fast-response TVS placed immediately after input fuse to minimize trace inductance impact on clamping. Use Value: DO-218AC package provides 0.90 °C/W RθJC, enabling direct thermal coupling to heatsink pads for repeated surge endurance. |
Use Scenario: Protects EPS motor driver gate drivers and MCU from inductive kickback during steering actuation. IC Role / Device Role / Timing Role: Unidirectional suppressor mounted on high-current battery trace with metal heatsink soldered to inner ground layer. Use Value: Withstands 700 A 8.3 ms forward surge, supporting robust protection during high-dI/dt motor commutation events. |
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 VBR, VWM, and PPPM; HM3 suffix indicates halogen-free molding compound and different tape/reel packaging (750 pcs vs. 750 pcs) | Identical electrical and thermal performance; HM3 variant is designated "Not For New Designs" replacement for HE3 | Select SM8S16AHM3 only for legacy redesign continuity; SM8S16ATHE3/I remains valid for existing production with HE3 logistics chain |
| SMAJ16A | Lower PPPM (400 W), smaller SMA package (RθJC ≈ 50 °C/W), no AEC-Q101 qualification | Not suitable for automotive load dump; limited to low-energy board-level ESD or inductive switching protection | Use SMAJ16A only in cost-sensitive, non-automotive industrial applications where 6600 W surge immunity is not required |
Compared with SM8S16AHM3, the SM8S16ATHE3/I offers identical surge ratings but maintains legacy HE3 tape-and-reel delivery and whisker-tested leads; versus SMAJ16A, it delivers 16.5× higher peak power handling and automotive-grade reliability validation.
Availability
SM8S16ATHE3/I is available at Aetrix Electronics and suitable for automotive ECU protection, body electronics power conditioning, and ADAS camera module surge immunity requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SM8S16ATHE3/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, MOSFETs, and protection devices with emphasis on automotive, industrial, and computing applications.
The SM8SxxAT family was engineered specifically for high-energy automotive load dump protection, combining AEC-Q101 qualification, DO-218AC thermal efficiency, and ISO 7637-2 compliance in a surface-mount format.
FAQ
What is the maximum clamping voltage of the SM8S16ATHE3/I during a 10/1000 μs surge?
The SM8S16ATHE3/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 JEDEC standards and guarantees that downstream components see no more than 26.0 V during worst-case transient events, making the SM8S16ATHE3/I suitable for protecting 28 V tolerant ICs in 12 V automotive systems.
Is the SM8S16ATHE3/I qualified for automotive applications?
Yes, the SM8S16ATHE3/I is AEC-Q101 qualified and explicitly rated for automotive use. Its construction includes matte tin-plated leads compliant with JESD 22-B102, JESD 201 Class 2 whisker resistance, and operation up to +175 °C junction temperature - all validated per AEC-Q101 stress test requirements. The SM8S16ATHE3/I is commonly deployed in engine control units and body control modules.
What does the "HE3" suffix indicate in SM8S16ATHE3/I?
The "HE3" suffix in SM8S16ATHE3/I denotes RoHS-compliant construction, AEC-Q101 qualification, and compliance with JESD 201 Class 2 whisker testing. It also specifies packaging in 13″ plastic tape and reel (750 pieces), with anode oriented toward sprocket holes. This suffix distinguishes it from non-automotive variants and confirms suitability for high-reliability production environments.
Can the SM8S16ATHE3/I replace older SMAJ or SMBJ series TVS diodes?
No, the SM8S16ATHE3/I is not a drop-in replacement for SMAJ or SMBJ series due to its DO-218AC package, higher surge rating (6600 W vs. 400 W/600 W), and integrated metal heatsink. Substituting it requires PCB layout changes to accommodate the larger footprint and thermal pad. The SM8S16ATHE3/I is intended for new designs demanding higher energy handling, not retrofits of legacy TVS footprints.
What is the thermal resistance from junction to case for the SM8S16ATHE3/I?
The SM8S16ATHE3/I has a typical junction-to-case thermal resistance (RθJC) of 0.90 °C/W, measured under standard conditions. This low value is enabled by the DO-218AC package's metal heatsink structure, which must be soldered to a substantial copper area on the PCB to realize full thermal performance. Proper mounting ensures the SM8S16ATHE3/I sustains its 8 W power dissipation rating at TC = 25 °C.
SM8S16ATHE3/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):
- 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-218AC
SM8S16ATHE3/I FAQ
1.How can I place an order for SM8S16ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM8S16ATHE3/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 SM8S16ATHE3/I reliable?
The price and inventory of SM8S16ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM8S16ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM8S16ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM8S16ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM8S16ATHE3/I?
SM8S16ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM8S16ATHE3/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 SM8S16ATHE3/I?
For technical support, including SM8S16ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM8S16ATHE3/I requirements.
6.How does Aetrix verify that SM8S16ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM8S16ATHE3/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 SM8S16ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM8S16ATHE3/I?
All SM8S16ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM8S16ATHE3/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 SM8S16ATHE3/I part is unused and in its original packaging.
Return procedure for SM8S16ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM8S16ATHE3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
