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Vishay General Semiconductor - Diodes Division SM6S11HE3/2D
- Part No.:
- SM6S11HE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S11HE3/2D.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,380
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Product details
Overview
SM6S11HE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for automotive load dump protection. It features a 12.2 V minimum breakdown voltage (VBR), 11.0 V standoff voltage (VWM), 229 A peak pulse current (IPPM) under 10/1000 µs waveform, 20.1 V clamping voltage (VC), and AEC-Q101 qualification for under-hood electronics.
For engineers reviewing the SM6S11HE3/2D datasheet, SM6S11HE3/2D pinout, SM6S11HE3/2D application, or SM6S11HE3/2D equivalent, key selection criteria include unidirectional polarity, DO-218AB package thermal performance (RθJC = 0.95 °C/W), 175 °C junction rating, ISO7637-2 compliance, and 4600 W peak pulse power handling in automotive power rail protection.
Technical Context
The SM6S11HE3/2D operates as a unidirectional clamping TVS diode with anode-connected heatsink configuration, enabling high-current surge diversion during load dump events. Its passivated anisotropic rectifier structure ensures stable leakage (<10 µA at VWM) and low forward voltage drop (≤1.9 V at 100 A).
Designed specifically for automotive 12 V systems, it meets ISO7637-2 test conditions with 10 ms exponential waveform capability up to 3600 W and supports continuous operation from –55 °C to +175 °C junction temperature, validated per AEC-Q101 stress testing protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11.0 V - Maximum reverse working voltage before clamping activation; sets operating margin above 12 V nominal rail. |
| VBR (min/max) | 12.2 V / 14.9 V - Breakdown threshold range at 5 mA test current; defines clamping onset precision. |
| VC @ IPPM | 20.1 V - Clamped voltage at 229 A peak pulse (10/1000 µs); limits downstream IC stress during transients. |
| PPPM (10/1000 µs) | 4600 W - Peak pulse power handling; enables robust protection against severe load dump surges. |
| TJ max | +175 °C - Maximum junction temperature; supports placement near hot engine compartments without derating. |
| RθJC | 0.95 °C/W - Junction-to-case thermal resistance; allows direct heatsink mounting for sustained power dissipation. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling. |
Pinout & Package
Package: DO-218AB surface-mount case with integral metal heatsink (anode terminal). Molding compound meets UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Cathode | Connected to protected circuit node; carries transient current into device during clamping. |
| Lead 2 / Metal Heatsink | Anode | Primary thermal path and electrical return; must be soldered to large copper area for RθJC optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier technology ensures <10 µA leakage at VWM and stable VBR over lifetime. |
| High-temperature operation | Rated for continuous use at TJ = 175 °C - eliminates thermal derating in under-hood modules. |
| ISO7637-2 compliance | Validated for load dump immunity per automotive standard using 10 ms exponential waveform testing. |
| MSL Level 1 | Moisture sensitivity level 1 (peak reflow = 245 °C) - supports standard SMT assembly without baking. |
| Whisker-resistant finish | HE3 suffix meets JESD 201 Class 2 - prevents tin whisker growth in long-life automotive applications. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Voltage spikes up to 40 V induced by alternator field-circuit interruption in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed at main power input to absorb energy and clamp rail voltage below 20.1 V. Use Value: Prevents damage to MCU, CAN transceivers, and analog sensors by limiting transient overvoltage to safe levels per ISO7637-2. |
Use Scenario: Transient suppression on 5 V or 3.3 V regulator input derived from switched 12 V battery rail in ECU modules. IC Role / Device Role / Timing Role: Secondary protection stage after primary bulk TVS; handles residual fast-rising edges and repetitive switching noise. Use Value: Enables reliable operation of automotive-grade microcontrollers and power management ICs under harsh electrical environments. |
| Body Control Module (BCM) Power Rail | ADAS Camera Power Supply |
Use Scenario: Protection of LIN bus interfaces and relay drivers exposed to inductive kickback from door lock actuators and lighting loads. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor mounted directly at BCM power entry point with minimal trace inductance. Use Value: Maintains functional safety integrity by preventing latch-up or reset events caused by >20 V transients on 12 V supply lines. |
Use Scenario: Surge protection for 12 V input of image sensor power modules in rear-view or surround-view camera systems. IC Role / Device Role / Timing Role: Primary transient guard before DC/DC converters; leverages DO-218AB thermal mass to sustain repeated 10/1000 µs pulses. Use Value: Ensures uninterrupted video stream during ignition cycles and jump-start events by maintaining regulated output despite input rail disturbances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/5AT | DO-214AC (SMA) package; lower PPPM (400 W); VC = 18.2 V at 23.5 A; RθJC ≈ 40 °C/W. | Limited to low-energy transients; unsuitable for ISO7637-2 load dump; best for board-level ESD or switching noise. | Select when space-constrained layout requires SMA footprint and surge energy is <500 W. |
| 1.5KE11A | DO-201AD axial lead; PPPM = 1500 W; VC = 18.2 V at 82.5 A; not AEC-Q101 qualified; no MSL rating. | Requires through-hole assembly; lacks automotive qualification and reflow compatibility; higher thermal resistance. | Choose only for non-automotive industrial prototypes where cost outweighs reliability and manufacturability. |
Compared with SMAJ11A-E3/5AT and 1.5KE11A, the SM6S11HE3/2D delivers 11.5× higher peak power handling, AEC-Q101 validation, MSL Level 1 process compatibility, and superior thermal management via DO-218AB heatsink - making it the sole option for production automotive load dump protection.
Availability
SM6S11HE3/2D is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) design, and body control module (BCM) development requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for SM6S11HE3/2D 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The SM6S11HE3/2D belongs to Vishay's PAR® family of high-power TVS diodes engineered specifically for automotive load dump and ISO7637-2 compliance, emphasizing thermal robustness, AEC-Q101 qualification, and surface-mount manufacturability.
FAQ
What is the clamping voltage of the SM6S11HE3/2D under maximum surge conditions?
The SM6S11HE3/2D has a maximum clamping voltage (VC) of 20.1 V at its rated peak pulse current of 229 A (10/1000 µs waveform). This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88384, Rev. 22-Jul-16) and defines the upper voltage limit imposed on protected circuits during worst-case transients. The SM6S11HE3/2D maintains this clamping performance across its full operating temperature range.
Is the SM6S11HE3/2D suitable for bidirectional transient protection?
No, the SM6S11HE3/2D is strictly unidirectional - its internal structure and polarity marking (heatsink = anode) support clamping only for positive-going transients on the cathode side. For bidirectional protection, a separate symmetric TVS array or back-to-back configuration would be required. The SM6S11HE3/2D datasheet explicitly states "Available in uni-directional polarity only" and does not specify reverse standoff or clamping behavior.
Does the SM6S11HE3/2D meet automotive qualification standards?
Yes, the SM6S11HE3/2D is AEC-Q101 qualified and rated for operation from –55 °C to +175 °C. It also meets MSL Level 1 per J-STD-020 and passes JESD 201 Class 2 whisker testing due to its HE3 suffix. These qualifications are documented in the official Vishay datasheet (88384) and confirmed in the ordering information section for the SM6S11HE3/2D part number.
What is the thermal resistance from junction to case for the SM6S11HE3/2D?
The SM6S11HE3/2D has a typical junction-to-case thermal resistance (RθJC) of 0.95 °C/W, as specified in the Thermal Characteristics table of the Vishay datasheet. This low value is enabled by the DO-218AB package's integral metal heatsink (anode terminal), which must be soldered to a thermally robust PCB copper area to achieve rated power dissipation and prevent thermal runaway during repetitive surge events.
How does the SM6S11HE3/2D compare to the SM6S11A variant?
The SM6S11HE3/2D has a broader VBR range (12.2–14.9 V) versus SM6S11A (12.2–13.5 V), resulting in higher maximum clamping voltage (20.1 V vs. 18.2 V) and lower IPPM (229 A vs. 253 A) under identical test conditions. Both share the same VWM (11.0 V), package (DO-218AB), and AEC-Q101 qualification. The SM6S11HE3/2D is selected when tighter VBR tolerance is not required but higher surge margin is needed.
SM6S11HE3/2D 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 229A
- Power - Peak Pulse:
- 4600W (4.6kW)
- 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
SM6S11HE3/2D FAQ
1.How can I place an order for SM6S11HE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S11HE3/2D 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 SM6S11HE3/2D reliable?
The price and inventory of SM6S11HE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S11HE3/2D is usually 5 days.
3.What payment methods are accepted for SM6S11HE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S11HE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S11HE3/2D?
SM6S11HE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S11HE3/2D 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 SM6S11HE3/2D?
For technical support, including SM6S11HE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S11HE3/2D requirements.
6.How does Aetrix verify that SM6S11HE3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S11HE3/2D 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 SM6S11HE3/2D meets industry standards.
7.What is the process for return or replacement of SM6S11HE3/2D?
All SM6S11HE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S11HE3/2D, 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 SM6S11HE3/2D part is unused and in its original packaging.
Return procedure for SM6S11HE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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