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Vishay General Semiconductor - Diodes Division SM6T22CAHE3_B/I
- Part No.:
- SM6T22CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CAHE3_B/I.pdf
- Description:
- 600W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,182
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Product details
Overview
SM6T22CAHE3_B/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 600 W peak pulse power (10/1000 μs), and clamping voltage of 30.6 V at 20 A. It provides robust ESD and surge protection for automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SM6T22CAHE3_B/I datasheet, SM6T22CAHE3_B/I pinout, SM6T22CAHE3_B/I application, or SM6T22CAHE3_B/I equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.32), TJ max. of +150 °C, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM = 18.8 V).
The device delivers 600 W peak pulse power under standardized 10/1000 μs waveform conditions with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, supporting reliable operation up to +150 °C junction temperature in compact SMB footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise voltage threshold where clamping initiates in either direction |
| VWM | 18.8 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 30.6 V at 20 A (10/1000 μs) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 600 W - peak transient energy absorption capability without failure |
| TJ max. | +150 °C - enables use in under-hood automotive environments and high-temperature industrial enclosures |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" × 0.130" footprint and J-STD-020 MSL Level 1 rating |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode side) | Transient current return path in negative half-cycle | One terminal conducts during negative transients; symmetric conduction eliminates need for orientation during placement |
| Anode (Cathode side) | Transient current return path in positive half-cycle | Second terminal conducts during positive transients; terminals are electrically interchangeable in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, and differential sensor pairs without external polarity management |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when mounted per recommended pad layout |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics |
| Low clamping ratio (VC/VBR) | 1.32 - minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| MSL Level 1, 260 °C reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to limit transient excursions. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs during 12 V system surges up to 400 A peak. | Use Scenario: Safeguarding PLC digital input modules against field-wiring induced transients from relay coils and motor drives. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor at connector entry point to shunt surge energy before reaching isolation barrier or MCU GPIO. Use Value: Maintains functional safety integrity by limiting voltage to <31 V during 1 kV/500 A 10/1000 μs surges per IEC 61000-4-5. |
| Consumer Audio Line Protection | Telecom DSL/ADSL Line Interface |
Use Scenario: Shielding balanced audio inputs (e.g., XLR, TRS) in professional mixers and amplifiers from ESD and cable-induced spikes. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp across line pair to preserve signal fidelity while suppressing ±8 kV contact ESD per IEC 61000-4-2. Use Value: Achieves <0.5 pF junction capacitance at zero bias, minimizing high-frequency insertion loss and crosstalk in 20 kHz bandwidth paths. | Use Scenario: Front-end surge suppression for ADSL line drivers and receivers exposed to lightning-induced surges on telephone lines. IC Role / Device Role / Timing Role: Primary protection device between line transformer secondary and PHY IC, operating in conjunction with gas discharge tube (GDT) secondary stage. Use Value: Clamps fast-rising transients to <31 V within nanoseconds, preventing damage to sensitive CMOS transceivers rated for 3.3 V operation. |
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 (20.9–23.1 V) and PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W margin is required | Select SMAJ22CA only if board space is constrained and surge threat level is ≤IEC 61000-4-5 Level 3. |
| 1.5KE22CA | Higher PPPM = 1500 W but axial DO-201 package; VC = 33.2 V at 45.5 A; not surface-mountable | Requires through-hole assembly and larger PCB area; incompatible with automated SMT lines | Choose 1.5KE22CA only for prototyping or legacy through-hole designs where rework tolerance outweighs production efficiency needs. |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CAHE3_B/I uniquely combines AEC-Q101 qualification, SMB SMT compatibility, 600 W capability, and bidirectional symmetry-making it the optimal choice for volume automotive and industrial SMT production where reliability, manufacturability, and standardized surge immunity are jointly critical.
Availability
SM6T22CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply across multi-year production programs.
Supply support for SM6T22CAHE3_B/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 and automotive-grade performance.
The SM6T Series was developed specifically for surface-mount transient suppression in space-constrained, high-reliability applications-including automotive electronics, industrial controls, and communications infrastructure-where AEC-Q101 compliance and consistent clamping behavior are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T22CAHE3_B/I?
The "CA" suffix in SM6T22CAHE3_B/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both polarities. This allows it to protect AC-coupled circuits, differential signal lines, and ungrounded interfaces without regard to orientation. Unlike unidirectional variants (e.g., SM6T22A), SM6T22CAHE3_B/I has no cathode marking and conducts equally during positive and negative transients.
Is SM6T22CAHE3_B/I qualified for automotive applications?
Yes, SM6T22CAHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code structure ("HE3" suffix) and documentation. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and ESD-to meet automotive reliability standards. This makes SM6T22CAHE3_B/I suitable for engine control units, ADAS sensors, and body electronics where extended temperature operation and long-term stability are required.
What is the clamping voltage of SM6T22CAHE3_B/I at rated surge current?
The clamping voltage of SM6T22CAHE3_B/I is 30.6 V at 20 A under the standard 10/1000 μs double-exponential surge waveform. This value is measured across the device terminals during peak current and represents the maximum voltage imposed on the protected circuit. The low clamping ratio (VC/VBR ≈ 1.32) ensures minimal overvoltage stress on downstream 3.3 V or 5 V ICs.
Does SM6T22CAHE3_B/I require special PCB layout considerations?
Yes, SM6T22CAHE3_B/I should be mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power dissipation. Short, wide traces to the protected node minimize inductance and ensure effective clamping. The SMB package supports standard reflow profiles (MSL Level 1, peak 260 °C), and no baking is required prior to assembly.
How does SM6T22CAHE3_B/I differ from SM6T22A?
SM6T22CAHE3_B/I is bidirectional with symmetrical clamping in both polarities and no polarity marking, whereas SM6T22A is unidirectional with a cathode band and conducts only in reverse bias. SM6T22CAHE3_B/I has identical VBR, VWM, and PPPM ratings but differs in test current (1 mA vs. 10 mA for some unidirectional variants) and application scope-SM6T22CAHE3_B/I is preferred for AC, differential, or floating signal protection.
SM6T22CAHE3_B/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:
- Active
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T22CAHE3_B/I FAQ
1.How can I place an order for SM6T22CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CAHE3_B/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_B/I reliable?
The price and inventory of SM6T22CAHE3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SM6T22CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CAHE3_B/I?
SM6T22CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CAHE3_B/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_B/I?
For technical support, including SM6T22CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CAHE3_B/I requirements.
6.How does Aetrix verify that SM6T22CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T22CAHE3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SM6T22CAHE3_B/I?
All SM6T22CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CAHE3_B/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_B/I part is unused and in its original packaging.
Return procedure for SM6T22CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CAHE3_B/I Tags
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