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Vishay General Semiconductor - Diodes Division SM6T22CAHE3/5B
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- Part No.:
- SM6T22CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CAHE3/5B.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,998
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Product details
Overview
SM6T22CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 22 V breakdown voltage (VBR min/max = 20.9–23.1 V), 30.6 V max clamping voltage at 20 A (10/1000 μs), 600 W peak pulse power, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T22CAHE3/5B datasheet, SM6T22CAHE3/5B pinout, SM6T22CAHE3/5B application, or SM6T22CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.32), RoHS-compliant matte tin terminals, MSL Level 1 rating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T22CAHE3/5B operates as a silicon avalanche diode with symmetrical bidirectional conduction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at 18.8 V).
It 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 TJ = +150 °C in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V - Ensures consistent avalanche initiation across production lots at 1.0 mA test current |
| VWM | 18.8 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 30.6 V @ 20.0 A - Clamps transient energy within safe IC voltage tolerance margins |
| PPPM | 600 W - Handles high-energy surges such as ISO 7637-2 Pulse 1/2a/5a in automotive systems |
| TJ max | +150 °C - Supports under-hood automotive environments and industrial ambient conditions |
| AEC-Q101 | Qualified - Meets stress testing requirements for automotive electronic components |
| Package | SMB (DO-214AA) - Standardized surface-mount footprint compatible with IPC-7351B land patterns |
Pinout & Package
SM6T22CAHE3/5B uses an SMB (DO-214AA) package with two terminals: anode and cathode. As a bidirectional device, it has no polarity marking; both terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either direction) | Connects to protected line; conducts during either positive or negative overvoltage event |
| Cathode | Transient current exit point (either direction) | Connects to reference (e.g., ground or return path); completes clamping loop symmetrically |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and floating power rails without polarity constraints |
| 600 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) surge immunity requirements |
| Low clamping voltage (30.6 V) | Provides margin below 33 V system rail limits, protecting downstream 3.3 V/5 V logic and analog front-ends |
| AEC-Q101 qualification | Validates reliability for automotive infotainment, ADAS sensor interfaces, and body control modules |
| MSL Level 1, 260 °C reflow | Supports standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and temperature/pressure sensors exposed to load-dump and inductive switching transients in vehicle cabins. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or between signal line and chassis ground. Use Value: Clamps transients to ≤30.6 V while maintaining signal integrity and meeting ISO 16750-2 electrical load dump immunity. | Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs against ESD and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Parallel-connected TVS on A/B bus lines referenced to common-mode ground. Use Value: Limits common-mode overvoltage to safe levels without distorting data timing or causing false edge detection. |
| Consumer Audio Line Protection | Power Supply Input Clamp |
Use Scenario: Shielding analog audio inputs (e.g., 3.5 mm jack, HDMI CEC line) in smart speakers and AV receivers from user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector interface, shunting ESD to ground. Use Value: Prevents latch-up or damage to audio codec ICs while preserving bandwidth due to minimal parasitic capacitance. | Use Scenario: Suppressing turn-on/turn-off spikes on 24 V DC input rails of embedded controllers and motor drivers. IC Role / Device Role / Timing Role: Primary clamping device across input terminals, coordinated with bulk capacitance and upstream fusing. Use Value: Absorbs 600 W surge energy without degradation, extending service life of downstream DC-DC converters and microcontrollers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Same VBR range (20.9–23.1 V), lower PPPM = 400 W, SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; less suitable for automotive load-dump events | Select when board space is constrained and surge threat level is Class 2 per IEC 61000-4-5 |
| 1.5KE22CA | Higher PPPM = 1500 W, axial DO-204AC package, higher VC = 33.2 V, not AEC-Q101 qualified | Requires through-hole mounting; unsuitable for high-density SMT designs or automotive qualification requirements | Choose only for legacy through-hole systems where higher surge margin offsets larger size and lack of automotive qualification |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CAHE3/5B uniquely balances 600 W surge handling, AEC-Q101 compliance, SMB footprint, and low clamping voltage-making it optimal for new automotive and industrial SMT designs requiring validated reliability and compact layout.
Availability
SM6T22CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial communication ports, consumer audio inputs, and DC power supply clamping requiring stable component supply and full traceability.
Supply support for SM6T22CAHE3/5B 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 reliability, efficiency, and application-specific performance.
The SM6T Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where high pulse power, low clamping, and qualification-grade consistency are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T22CAHE3/5B?
The "CA" suffix denotes that SM6T22CAHE3/5B is a bidirectional transient voltage suppressor. Unlike unidirectional variants (e.g., SM6T22A), it provides symmetrical clamping for both positive and negative voltage transients, eliminating polarity concerns during PCB layout and enabling protection of AC-coupled or differential signal paths without external circuitry.
Is SM6T22CAHE3/5B suitable for automotive applications?
Yes, SM6T22CAHE3/5B is AEC-Q101 qualified and manufactured with HE3 suffix indicating automotive-grade screening. It meets stringent stress tests including temperature cycling, humidity bias, and mechanical shock-making it appropriate for engine control units, ADAS camera modules, and body electronics where reliability under vibration and thermal cycling is critical.
What is the maximum clamping voltage of SM6T22CAHE3/5B and how is it measured?
The maximum clamping voltage of SM6T22CAHE3/5B is 30.6 V, measured at 20.0 A peak pulse current using the standardized 10/1000 μs double-exponential waveform. This value reflects worst-case voltage seen by protected circuitry during surge events and is guaranteed across temperature and production lot variations per Vishay's characterization methodology.
Does SM6T22CAHE3/5B require special PCB layout considerations?
Yes-SM6T22CAHE3/5B should be mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal to achieve rated 600 W pulse power. Short, low-inductance traces to ground or reference plane are essential; routing through vias or long traces increases clamping voltage and reduces effective surge handling capability.
How does the HE3 suffix differ from E3 or M3 in SM6T22CAHE3/5B?
The HE3 suffix in SM6T22CAHE3/5B indicates RoHS-compliant construction with AEC-Q101 qualification, whereas E3 denotes commercial-grade RoHS compliance and M3 adds halogen-free material content. HE3 parts undergo additional automotive-specific screening, including extended temperature cycling and failure analysis, ensuring suitability for safety-critical vehicle subsystems.
SM6T22CAHE3/5B 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:
- Discontinued at Digi-Key
- 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)
SM6T22CAHE3/5B FAQ
1.How can I place an order for SM6T22CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CAHE3/5B 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 SM6T22CAHE3/5B reliable?
The price and inventory of SM6T22CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T22CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T22CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CAHE3/5B?
SM6T22CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CAHE3/5B 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 SM6T22CAHE3/5B?
For technical support, including SM6T22CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CAHE3/5B requirements.
6.How does Aetrix verify that SM6T22CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T22CAHE3/5B 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 SM6T22CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T22CAHE3/5B?
All SM6T22CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CAHE3/5B, 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 SM6T22CAHE3/5B part is unused and in its original packaging.
Return procedure for SM6T22CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CAHE3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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