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Vishay General Semiconductor - Diodes Division SM6T22CAHE3_A/I
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- Part No.:
- SM6T22CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CAHE3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,034
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Product details
Overview
SM6T22CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), and 30.6 V maximum clamping voltage (VC) at IPPM. It provides robust ESD and surge protection for automotive sensor signal lines, USB interfaces, and industrial I/O ports.
For engineers reviewing the SM6T22CAHE3_A/I datasheet, SM6T22CAHE3_A/I pinout, SM6T22CAHE3_A/I application, or SM6T22CAHE3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, 150 °C max junction temperature, low 20 Ω typical junction-to-lead thermal resistance, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM = 18.8 V).
Designed for high-reliability automotive applications, SM6T22CAHE3_A/I meets AEC-Q101 stress testing requirements and is qualified for use in engine control units, ADAS camera modules, and infotainment system interfaces where transient immunity to ISO 7637-2 pulses and ESD per IEC 61000-4-2 is mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 30.6 V at 20.0 A (10/1000 μs) - actual clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 600 W - peak transient power handling capability under standardized 10/1000 μs waveform |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating |
| RθJL | 20 °C/W - low thermal resistance from junction to lead supports sustained power dissipation in compact layouts |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical PN junction; interchangeable with Cathode in bidirectional operation |
| Cathode | Terminal K | Other side of symmetrical PN junction; no band marking per spec - terminals are functionally identical |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential buses (e.g., CAN, RS-485) without external polarity management |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and ESD stress per JEDEC standards |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes voltage overshoot during transients, preserving margin for downstream 3.3 V or 5 V logic |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture-induced popcorning or delamination |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure or temperature sensors in engine control modules exposed to load-dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting transient excursions to ≤30.6 V during ISO 7637-2 Pulse 1/2a/5a events. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends while maintaining signal integrity below 20 mV offset shift. | Use Scenario: Safeguarding 24 V digital input channels on PLC modules against field-wiring surges and ground-bounce coupling. IC Role / Device Role / Timing Role: Fast-response (tR < 1 ns) shunt device that diverts >95% of 1 kV/500 A surge energy away from optocoupler inputs. Use Value: Eliminates need for discrete RC snubbers and extends mean time between failures (MTBF) by >3× in factory automation environments. |
| USB 2.0 Data Line Protection | RS-485 Transceiver Port |
Use Scenario: ESD and EFT protection for D+ and D− lines in automotive infotainment USB host ports subjected to ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) bidirectional clamp placed directly at connector entry point. Use Value: Maintains USB 2.0 signal integrity (eye diagram compliance) while passing IEC 61000-4-2 Level 4 without data corruption. | Use Scenario: Transient suppression on half-duplex RS-485 bus lines in smart metering gateways deployed in electric substations. IC Role / Device Role / Timing Role: Symmetric clamping element absorbing common-mode surges up to 4 kV (10/1000 μs) across A/B terminals. Use Value: Ensures uninterrupted Modbus RTU communication during lightning-induced ground potential rise 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 |
|---|---|---|---|
| SMAJ22CA | Same VBR range and SMB package, but rated for 400 W PPPM and not AEC-Q101 qualified | Limited to commercial-grade industrial equipment; lacks automotive stress validation | Select when cost sensitivity outweighs automotive qualification requirements |
| 1.5KE22CA | Higher PPPM (1500 W) but axial DO-15 package - incompatible with automated SMT assembly | Requires manual insertion or wave soldering; unsuitable for high-density PCBs | Choose only for legacy through-hole designs or prototyping with breadboard adapters |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CAHE3_A/I delivers automotive-grade reliability in an SMT-optimized footprint with balanced 600 W surge capacity - making it the preferred choice for production automotive electronics where AEC-Q101 compliance, board space, and manufacturability are jointly critical.
Availability
SM6T22CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and USB/RS-485 interface protection requiring stable component supply across multi-year production cycles.
Supply support for SM6T22CAHE3_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, MOSFETs, and protection devices with emphasis on high-reliability, high-efficiency solutions.
The SM6T Series is designed specifically for robust transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, low-inductance SMB packaging, and tightly controlled clamping characteristics.
FAQ
What does the "CA" suffix indicate in SM6T22CAHE3_A/I?
The "CA" suffix in SM6T22CAHE3_A/I denotes a bidirectional configuration - meaning the device functions identically in both forward and reverse bias directions, enabling symmetric clamping of AC signals or differential buses like CAN or RS-485 without polarity constraints. This is confirmed in Vishay's SM6T datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SM6T22CAHE3_A/I qualified for automotive use?
Yes, SM6T22CAHE3_A/I is AEC-Q101 qualified, as explicitly stated in the Vishay SM6T datasheet (Document Number: 88385, Revision: 09-Jan-2024) under "FEATURES" and "ORDERING INFORMATION". The "HE3" suffix indicates RoHS-compliant and AEC-Q101 qualified construction, validated for automotive under-hood and cabin applications.
What is the maximum clamping voltage of SM6T22CAHE3_A/I during a 10/1000 μs surge?
The maximum clamping voltage (VC) of SM6T22CAHE3_A/I is 30.6 V at IPPM = 20.0 A under a 10/1000 μs waveform, per the "ELECTRICAL CHARACTERISTICS" table on page 2 of the Vishay SM6T datasheet. This value represents the peak voltage imposed on the protected circuit during worst-case transient conditions.
Does SM6T22CAHE3_A/I have polarity markings on the package?
No, SM6T22CAHE3_A/I has no polarity markings - consistent with its bidirectional design. As specified in the "MECHANICAL DATA" section of the Vishay datasheet, "no marking on bidirectional types", confirming that both terminals are functionally interchangeable and the device exhibits identical electrical behavior regardless of orientation.
What is the thermal resistance from junction to lead (RθJL) for SM6T22CAHE3_A/I?
The typical thermal resistance from junction to lead (RθJL) for SM6T22CAHE3_A/I is 20 °C/W, as published in the "THERMAL CHARACTERISTICS" table on page 2 of the Vishay SM6T datasheet. This low value supports efficient heat transfer to PCB copper pads, enabling reliable operation at elevated ambient temperatures up to +125 °C.
SM6T22CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 20A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T22CAHE3_A/I FAQ
1.How can I place an order for SM6T22CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CAHE3_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 SM6T22CAHE3_A/I reliable?
The price and inventory of SM6T22CAHE3_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 SM6T22CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T22CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CAHE3_A/I?
SM6T22CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CAHE3_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 SM6T22CAHE3_A/I?
For technical support, including SM6T22CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CAHE3_A/I requirements.
6.How does Aetrix verify that SM6T22CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T22CAHE3_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 SM6T22CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T22CAHE3_A/I?
All SM6T22CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CAHE3_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 SM6T22CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM6T22CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CAHE3_A/I Tags
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