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Vishay General Semiconductor - Diodes Division SM6S11AHE3/2D
- Part No.:
- SM6S11AHE3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S11AHE3/2D.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,904
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Product details
Overview
SM6S11AHE3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection. It features a 12.2 V minimum breakdown voltage (VBR), 11.0 V stand-off voltage (VWM), 4600 W peak pulse power (10/1000 µs), 175 °C junction temperature rating, and DO-218AB package - enabling robust clamping in 12 V automotive power systems.
For engineers reviewing the SM6S11AHE3/2D datasheet, SM6S11AHE3/2D pinout, SM6S11AHE3/2D application, or SM6S11AHE3/2D equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, ISO7637-2 surge compliance, low leakage (<10 µA at VWM), and thermal stability up to 175 °C in high-reliability vehicle electronics.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive transients while maintaining low forward voltage drop (≤1.9 V at 100 A). Its DO-218AB case provides low thermal resistance (RθJM = 0.45 °C/W) and meets MSL Level 1 with 245 °C reflow capability.
The device operates as a voltage-clamping protector in parallel with sensitive loads, activating above VWM to shunt surge current away from downstream circuitry. Its 0.072 %/°C VBR temperature coefficient ensures predictable breakdown shift across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC blocking threshold in 12 V systems. |
| VBR (min) | 12.2 V at 5 mA - Minimum breakdown voltage guarantees reliable turn-on during load dump events without premature conduction. |
| VC (max) | 18.2 V at IPPM = 253 A - Maximum clamped voltage limits stress on protected ICs and MOSFETs during 10/1000 µs surges. |
| PPPM | 4600 W (10/1000 µs) - Sustains high-energy transients typical of ISO7637-2 Pulse 5a load dump without failure. |
| TJ max | 175 °C - Enables operation in under-hood environments and supports AEC-Q101 qualification for automotive use. |
| IFSM | 600 A (8.3 ms half-sine) - Handles high-current surge pulses without bond wire fusing or metallization damage. |
| Leakage (ID) | <10 µA at VWM, 25 °C - Minimizes standby power loss and avoids false triggering in always-on vehicle modules. |
Pinout & Package
Package: DO-218AB - molded surface-mount case with metal heatsink cathode termination; meets UL 94 V-0, RoHS-compliant, AEC-Q101 qualified, and JESD 201 Class 2 whisker resistant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input terminal for transient energy path | Connected to protected line (e.g., battery rail); forms low-impedance path to heatsink during clamping. |
| Cathode / Heatsink (Lead 2) | Common reference and thermal interface | Electrically and thermally connected to PCB ground plane; serves as primary heat dissipation path (RθJM = 0.45 °C/W). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JEDEC standards. |
| ISO7637-2 compliant | Withstands defined load dump waveforms (Pulse 5a) without degradation, supporting OEM-level EMC requirements. |
| DO-218AB thermal performance | RθJM = 0.45 °C/W enables effective heat transfer to PCB copper, critical for sustained surge handling in compact layouts. |
| Low VF (≤1.9 V @ 100 A) | Reduces power loss and self-heating during high-current clamping, preserving surge margin over repeated events. |
| MSL Level 1 (245 °C) | Supports standard lead-free reflow profiles without popcorn cracking or delamination in automated assembly. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting 12 V battery-fed circuits during alternator load dump events (ISO7637-2 Pulse 5a). IC Role / Device Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients to ≤18.2 V. Use Value: Prevents overvoltage damage to microcontrollers, CAN transceivers, and power management ICs during 100 V/100 ms surges. |
Use Scenario: Safeguarding ECU main power supply against switching transients from fuel injectors and ignition coils. IC Role / Device Role: Parallel-connected transient suppressor on the 12 V input stage, upstream of DC/DC converters. Use Value: Limits clamped voltage to 18.2 V, ensuring downstream regulators remain within absolute maximum ratings during 600 A surge events. |
| Body Control Module (BCM) Power Rail | Advanced Driver Assistance Systems (ADAS) Camera Power |
Use Scenario: Securing BCM power inputs exposed to relay coil flyback and motor commutation noise. IC Role / Device Role: Standoff-rated TVS (VWM = 11.0 V) providing fast response (<1 ns) to sub-microsecond spikes. Use Value: Maintains <10 µA leakage at 11 V to avoid loading always-on wake-up circuits while delivering 4600 W surge capacity. |
Use Scenario: Protecting 12 V camera module inputs in ADAS front-facing systems subject to ESD and load dump. IC Role / Device Role: AEC-Q101-qualified TVS mounted directly at connector entry point to minimize inductance. Use Value: Ensures operational integrity at TJ = 175 °C under hood, with verified performance across -55 °C to +175 °C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM6S11AHM3/2D | Same electrical specs and DO-218AB package; HM3 suffix indicates enhanced material formulation per latest revision (Rev 06-Feb-2026). | Identical automotive use cases; preferred for new designs due to updated qualification and long-term availability. | Select SM6S11AHM3/2D when initiating new production - it replaces SM6S11AHE3/2D per Vishay's "Not For New Designs" notice. |
| SMAJ11A | Lower PPPM (400 W vs. 4600 W), SMA package (higher RθJA), no AEC-Q101 qualification, and lower IPPM (32.3 A). | Limited to non-automotive industrial or consumer applications with milder surge requirements. | Use SMAJ11A only in cost-sensitive, non-automotive designs where 4600 W surge immunity is not required. |
Compared with SM6S11AHE3/2D, SM6S11AHM3/2D offers identical protection performance with improved long-term supply assurance, while SMAJ11A provides basic clamping at significantly reduced surge capacity and automotive suitability.
Availability
SM6S11AHE3/2D is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) input safeguarding, and body control module (BCM) power rail stabilization requiring stable component supply across extended temperature and surge conditions.
Supply support for SM6S11AHE3/2D 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 power applications.
The SM6SxxA family was engineered specifically for high-energy automotive transient suppression, combining AEC-Q101 reliability, ISO7637-2 compliance, and DO-218AB thermal efficiency to meet stringent under-hood requirements.
FAQ
Is SM6S11AHE3/2D qualified for automotive applications?
Yes, SM6S11AHE3/2D is AEC-Q101 qualified and explicitly designed for automotive use, including load dump protection per ISO7637-2. It operates from -55 °C to +175 °C, supports MSL Level 1 reflow, and meets JESD 201 Class 2 whisker resistance - all confirmed in Vishay Document 88384.
What is the clamping voltage of SM6S11AHE3/2D at its rated peak pulse current?
The maximum clamping voltage (VC) of SM6S11AHE3/2D is 18.2 V at IPPM = 253 A (10/1000 µs waveform), as specified in the Electrical Characteristics table of the official datasheet (Document 88384, page 2).
Does SM6S11AHE3/2D have bidirectional polarity?
No, SM6S11AHE3/2D is unidirectional only - its polarity is fixed with the metal heatsink serving as the cathode. The datasheet explicitly states "Available in unidirectional polarity only" and shows the anode as Lead 1 and cathode/heatsink as Lead 2.
What is the thermal resistance junction-to-mount for SM6S11AHE3/2D?
The thermal resistance junction-to-mount (RθJM) for SM6S11AHE3/2D is 0.45 °C/W, measured using the Transient Dual Interface Test Method (TDIM) per JEDEC 51-14 - a value critical for calculating temperature rise under surge conditions.
Why is SM6S11AHE3/2D marked "Not For New Designs"?
Vishay designates SM6S11AHE3/2D "Not For New Designs" because the newer SM6S11AHM3/2D variant supersedes it with updated materials and long-term availability assurance, as stated in Document 88384 (Revision 06-Feb-2026). Both share identical electrical specs and packaging.
SM6S11AHE3/2D 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:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 253A
- 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
SM6S11AHE3/2D FAQ
1.How can I place an order for SM6S11AHE3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S11AHE3/2D 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 SM6S11AHE3/2D reliable?
The price and inventory of SM6S11AHE3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S11AHE3/2D is usually 5 days.
3.What payment methods are accepted for SM6S11AHE3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S11AHE3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S11AHE3/2D?
SM6S11AHE3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S11AHE3/2D 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 SM6S11AHE3/2D?
For technical support, including SM6S11AHE3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S11AHE3/2D requirements.
6.How does Aetrix verify that SM6S11AHE3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S11AHE3/2D 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 SM6S11AHE3/2D meets industry standards.
7.What is the process for return or replacement of SM6S11AHE3/2D?
All SM6S11AHE3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S11AHE3/2D, 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 SM6S11AHE3/2D part is unused and in its original packaging.
Return procedure for SM6S11AHE3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6S11AHE3/2D Tags
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