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Vishay General Semiconductor - Diodes Division SM6S22A-E3/2D
- Part No.:
- SM6S22A-E3/2D
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AB
- Datasheet:
-
SM6S22A-E3/2D.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO218AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,004
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Product details
Overview
SM6S22A-E3/2D from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in DO-218AB package, rated for 22 V standoff voltage (VWM), 24.4–26.9 V breakdown (VBR), 35.5 V clamping at 130 A peak pulse current (10/1000 μs), and 4600 W peak pulse power. It is AEC-Q101 qualified and designed for automotive load dump protection in engine control units and body electronics.
For engineers reviewing the SM6S22A-E3/2D datasheet, SM6S22A-E3/2D pinout, SM6S22A-E3/2D application, or SM6S22A-E3/2D equivalent, key selection criteria include unidirectional polarity, 175 °C junction temperature rating, low leakage (<10 μA at VWM), high surge capability (600 A IFSM), and compliance with ISO7637-2 for automotive transients.
Technical Context
This TVS diode operates as a clamping device in series with the anode connected to the protected line and cathode grounded-its heatsink serves as the anode terminal. It uses passivated anisotropic rectifier technology to achieve stable clamping under repetitive surge stress at elevated temperatures.
The device delivers 4600 W peak pulse power (10/1000 μs) and 3600 W (10/10 000 μs), with thermal resistance RθJC = 0.95 °C/W enabling effective heat transfer to the PCB copper pour or external heatsink. Its 175 °C maximum junction temperature supports operation in under-hood automotive environments without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 24.4 V / 26.9 V - Breakdown occurs within this range at 5 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 35.5 V - Clamping voltage at 130 A peak pulse ensures downstream ICs see ≤35.5 V during load dump |
| PPPM (10/1000 μs) | 4600 W - Sustains high-energy transients typical of ISO7637-2 Pulse 5a without failure |
| TJ max | +175 °C - Enables reliable operation in engine bay locations without thermal shutdown |
| Polarity | Unidirectional - Protects against positive-going transients only; requires correct anode-to-line orientation |
| IFSM | 600 A - Withstands 8.3 ms half-sine surge, critical for alternator load dump events |
Pinout & Package
Package: DO-218AB - Surface-mount, single-ended case with integral metal heatsink acting as anode terminal; meets UL 94 V-0, MSL Level 1, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Heatsink) | Input/Protected Line Connection | Metal base serves as primary current path and thermal interface; must be soldered to large copper area for heat dissipation |
| Cathode (Lead 1) | Ground Reference | Standard cathode lead connects to system ground; clamping action shunts surge current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JEDEC standards |
| Junction passivation | Reduces parameter drift over time and improves long-term stability under thermal stress up to 175 °C |
| Low leakage current | <10 μA at 22 V (25 °C) and <150 μA at 22 V (175 °C), minimizing standby power loss in always-on systems |
| ISO7637-2 compliance | Meets Pulse 5a (load dump) requirements across full temperature range without external circuitry |
| Matte tin-plated leads | Ensures robust solderability per J-STD-002 and JESD22-B102, supporting automated reflow and wave soldering |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) CAN Bus Power Rail |
|---|---|
Use Scenario: Protects ECU 12 V supply against alternator load dump transients exceeding 40 V and lasting up to 400 ms. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and input filter capacitor. Use Value: Limits voltage to ≤35.5 V during 130 A surges, preventing damage to LDOs, microcontrollers, and analog front-ends. | Use Scenario: Shields BCM power domain feeding isolated CAN transceivers from coupled transients on shared vehicle battery lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 5 V or 3.3 V regulated rail derived from main battery via DC/DC converter. Use Value: Maintains rail integrity during ISO7637-2 Pulse 5a, avoiding bus reset or communication dropout in safety-critical modules. |
| Automotive Lighting Driver Supply | ADAS Camera Module Power Input |
Use Scenario: Safeguards LED driver ICs in headlamp control units exposed to switching noise and load dump from adjacent circuits. IC Role / Device Role / Timing Role: Standoff-rated TVS on input side of buck controller, placed upstream of bulk capacitance. Use Value: Prevents latch-up or gate oxide damage in MOSFET drivers by clamping spikes before they reach sensitive gate terminals. | Use Scenario: Protects image sensor and ISP power rails in rear-view or surround-view cameras mounted near engine compartments. IC Role / Device Role / Timing Role: Final-stage TVS on 1.8 V or 2.8 V analog/digital supply lines, located immediately before camera SoC. Use Value: Ensures uninterrupted video stream during cold-cranking and load dump by limiting transient overshoot to <10% of nominal rail voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5B | DO-214AC (SMA) package; lower PPPM (400 W); VBR = 24.4–27.0 V; same VWM | Lower surge capacity limits use to non-load-dump applications such as ESD or inductive switching in cabin modules | Select when board space is constrained and surge energy is ≤400 W; not suitable for direct battery rail protection |
| TPSMD22A | DO-218AB package; same footprint; higher VC = 37.5 V at 125 A; slightly lower TJ max = 150 °C | Marginally higher clamping reduces protection margin for 3.3 V or 5 V logic; less suited for high-temp under-hood use | Acceptable for cost-sensitive industrial designs where 150 °C ambient suffices and 2 V higher clamping is tolerable |
Compared with SMAJ22A-E3/5B and TPSMD22A, SM6S22A-E3/2D provides superior surge handling (4600 W vs. 400 W or ~3800 W), higher temperature rating (175 °C), and tighter clamping (35.5 V), making it the preferred choice for AEC-Q101-compliant automotive battery rail protection.
Availability
SM6S22A-E3/2D is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, and ADAS camera power systems requiring stable component supply and long-term lifecycle support.
Supply support for SM6S22A-E3/2D 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, TVS devices, and optoelectronics with emphasis on reliability and automotive qualification.
The SM6SxxA family was engineered specifically for high-energy automotive load dump protection, combining DO-218AB thermal performance with AEC-Q101 validation and ISO7637-2 compliance.
FAQ
What is the clamping voltage of SM6S22A-E3/2D at its rated peak pulse current?
The SM6S22A-E3/2D has a maximum clamping voltage (VC) of 35.5 V when subjected to its peak pulse current (IPPM) of 130 A using a 10/1000 μs waveform. This value is measured at TC = 25 °C and guarantees that downstream circuitry remains below critical overvoltage thresholds during standardized load dump events defined in ISO7637-2.
Is SM6S22A-E3/2D suitable for bidirectional transient suppression?
No, SM6S22A-E3/2D is a unidirectional TVS diode and protects only against positive-going transients on the anode-to-cathode path. It cannot suppress negative voltage excursions. For bidirectional protection, a separate design using back-to-back diodes or a dedicated bidirectional part like SM6S22CA is required.
Does SM6S22A-E3/2D meet AEC-Q101 reliability standards?
Yes, SM6S22A-E3/2D is explicitly AEC-Q101 qualified per the Vishay datasheet (Document Number: 88384, Rev. 22-Jul-16). Qualification includes stress testing for temperature cycling, high-temperature operating life, unbiased highly accelerated stress test (uHAST), and mechanical shock-all performed to JEDEC standards for automotive discrete semiconductors.
What is the thermal resistance from junction to case for SM6S22A-E3/2D?
The SM6S22A-E3/2D has a typical junction-to-case thermal resistance (RθJC) of 0.95 °C/W. This low value enables efficient heat transfer from the silicon die to the metal heatsink (anode terminal), allowing sustained power dissipation when mounted on adequately sized PCB copper areas or external heatsinks.
Can SM6S22A-E3/2D replace SM6S22AHE3/2D?
Yes, SM6S22A-E3/2D is identical to SM6S22AHE3/2D-the "HE3" suffix denotes RoHS-compliant, matte tin-plated, AEC-Q101-qualified construction, and "E3" is Vishay's standardized prefix for that same qualification level. Both share identical electrical specs, DO-218AB packaging, and ordering code structure (e.g., /2D tape-and-reel delivery).
SM6S22A-E3/2D 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 130A
- Power - Peak Pulse:
- 4600W (4.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AB
SM6S22A-E3/2D FAQ
1.How can I place an order for SM6S22A-E3/2D through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6S22A-E3/2D 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 SM6S22A-E3/2D reliable?
The price and inventory of SM6S22A-E3/2D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6S22A-E3/2D is usually 5 days.
3.What payment methods are accepted for SM6S22A-E3/2D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6S22A-E3/2D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6S22A-E3/2D?
SM6S22A-E3/2D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6S22A-E3/2D 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 SM6S22A-E3/2D?
For technical support, including SM6S22A-E3/2D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6S22A-E3/2D requirements.
6.How does Aetrix verify that SM6S22A-E3/2D is sourced from the original manufacturer or authorized distributors?
All SM6S22A-E3/2D 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 SM6S22A-E3/2D meets industry standards.
7.What is the process for return or replacement of SM6S22A-E3/2D?
All SM6S22A-E3/2D units undergo pre-shipment inspection (PSI). If there is an issue with SM6S22A-E3/2D, 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 SM6S22A-E3/2D part is unused and in its original packaging.
Return procedure for SM6S22A-E3/2D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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