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Vishay General Semiconductor - Diodes Division SM6T22CAHM3_A/I
- Part No.:
- SM6T22CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CAHM3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,226
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Product details
Overview
SM6T22CAHM3_A/I 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 = 20.9–23.1 V at 1 mA), 30.6 V maximum clamping voltage (VC) at 20 A (10/1000 μs), 600 W peak pulse power, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T22CAHM3_A/I datasheet, SM6T22CAHM3_A/I pinout, SM6T22CAHM3_A/I application, or SM6T22CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.32), halogen-free RoHS compliance, MSL Level 1 rating, and suitability for automotive sensor line protection under ISO 7637-2 and IEC 61000-4-5 stress conditions.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR, VWM (18.8 V), and VC characteristics in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and robust surge handling up to 100 A IFSM (unidirectional only; not applicable here).
The device uses a low-inductance SMB package optimized for high-speed transient response and automated SMT placement. Thermal resistance RθJA is 100 °C/W (typ.), enabling reliable operation up to TJ = 150 °C with standard PCB copper pad layout per JEDEC DO-214AA recommendations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise clamping onset threshold in both directions |
| VWM | 18.8 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ 20 A (10/1000 μs) | 30.6 V - peak clamped voltage during 600 W surge, limiting downstream IC stress |
| PPPM | 600 W - peak pulse power handling per standard 10/1000 μs waveform |
| IPPM | 20.0 A - maximum non-repetitive surge current supported at rated VC |
| TJ range | −65 °C to +150 °C - enables deployment in under-hood automotive environments |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability and lifetime performance |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). No polarity marking - bidirectional symmetry eliminates orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical bidirectional clamping behavior - either terminal serves as input/output for surge suppression |
| Case (cathode band absent) | Thermal and mechanical interface | No cathode marking; terminals are functionally interchangeable - no orientation dependency in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity constraints |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 surges on 12 V systems |
| Low clamping voltage (30.6 V) | Protects 24 V-rated components (e.g., CAN transceivers, LIN drivers) while maintaining margin below absolute max ratings |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS | Complies with automotive material restrictions (e.g., VW 80101, GMW3172) and global environmental directives |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting ABS wheel speed sensors and ambient temperature sensors from load dump and inductive switching transients in 12 V vehicle electrical systems. IC Role / Device Role: Bidirectional TVS placed directly at connector entry point to clamp ±30 V surges before reaching analog front-end or microcontroller ADC inputs. Use Value: Prevents latch-up or permanent damage to precision op-amps and 12-bit ADCs by limiting transient voltage to ≤30.6 V during 20 A 10/1000 μs events. | Use Scenario: Shielding CAN H/L differential pair against ESD (IEC 61000-4-2 ±8 kV contact) and fast transients in factory automation PLCs. IC Role / Device Role: Low-capacitance TVS mounted adjacent to CAN transceiver pins to shunt energy without distorting 1 Mbps data signals. Use Value: Maintains signal integrity with <10 pF junction capacitance (typ.) while clamping ESD to safe levels below transceiver VIO abs-max rating. |
| Consumer USB Power Line | Telecom DSL Line Protection |
Use Scenario: Safeguarding USB-C VBUS lines in portable docking stations exposed to hot-plug induced overshoot and cable discharge events. IC Role / Device Role: Primary overvoltage clamp between upstream PD controller and downstream port switch, operating bidirectionally across 5–20 V range. Use Value: Enables robust 20 V PD negotiation by holding VBUS within 5.5–21 V window during 100 ns transients, avoiding false overvoltage shutdowns. | Use Scenario: Protecting ADSL/VDSL line drivers and SLIC circuits from lightning-induced surges on outdoor telecom wiring. IC Role / Device Role: First-stage protector on tip/ring lines before transformer coupling, rated for repeated 10/1000 μs surges up to 600 W. Use Value: Survives multiple 1 kV/500 A surges per ITU-T K.21 recommendation due to robust silicon junction and low thermal resistance (RθJL = 20 °C/W). |
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 (20.9–23.1 V), lower PPPM (400 W), SMA package (larger footprint, higher RθJA) | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for ISO 7637-2 Pulse 5a | Select when cost sensitivity outweighs automotive surge requirements and board space allows larger SMA |
| 1.5KE22CA | Higher PPPM (1500 W), axial leaded DO-201 package, slower response due to higher inductance | Not SMT-compatible; requires through-hole assembly and additional board area; less suitable for high-frequency transients | Choose only for legacy through-hole designs where 1.5 kW surge margin is mandatory and reflow compatibility is not required |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CAHM3_A/I delivers optimal balance of automotive-grade reliability (AEC-Q101), compact SMB footprint, 600 W surge capacity, and bidirectional symmetry-making it the preferred choice for new SMT-based automotive and industrial designs requiring IPC Class 3 compliance and zero-orientation assembly.
Availability
SM6T22CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB-C power delivery systems, and telecom DSL line protection requiring stable component supply across multi-year production cycles.
Supply support for SM6T22CAHM3_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 reliability, efficiency, and application-specific optimization.
The SM6T Series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, combining AEC-Q101 qualification, halogen-free construction, and optimized SMB packaging for automated manufacturing and harsh-condition operation.
FAQ
What does the "CA" suffix indicate in SM6T22CAHM3_A/I?
The "CA" suffix in SM6T22CAHM3_A/I denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SM6T22A), SM6T22CAHM3_A/I has no polarity marking and clamps equally across its terminals, making it ideal for AC-coupled or differential signal lines such as CAN, LIN, or USB D+/D−.
Is SM6T22CAHM3_A/I suitable for automotive applications?
Yes, SM6T22CAHM3_A/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials under Vishay's HM3 automotive-grade process. Its 150 °C maximum junction temperature, MSL Level 1 rating, and validation against ISO 7637-2 load dump and IEC 61000-4-5 surge standards make SM6T22CAHM3_A/I appropriate for engine control units, body control modules, and ADAS sensor interfaces.
What is the clamping voltage of SM6T22CAHM3_A/I at rated surge current?
The maximum clamping voltage (VC) of SM6T22CAHM3_A/I is 30.6 V when subjected to a 20 A peak pulse current with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88385 and reflects worst-case clamping performance under standardized surge conditions - critical for ensuring protected ICs remain within their absolute maximum voltage ratings.
How does the SMB package of SM6T22CAHM3_A/I compare to SMA or SMC alternatives?
The SMB (DO-214AA) package of SM6T22CAHM3_A/I offers a 30 % smaller footprint than SMA and 50 % smaller than SMC, enabling higher board density. Its lower parasitic inductance improves high-speed transient response, and its MSL Level 1 rating supports lead-free reflow without preconditioning - advantages not matched by larger or older-generation packages used in SMAJ or 1.5KE series devices.
Does SM6T22CAHM3_A/I require orientation during PCB placement?
No, SM6T22CAHM3_A/I does not require orientation during PCB placement because it is a bidirectional TVS diode with no cathode marking. The SMB package lacks a polarity band, and electrical performance is identical regardless of terminal connection - simplifying automated pick-and-place and eliminating risk of reverse installation errors in production.
SM6T22CAHM3_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 (SMB)
SM6T22CAHM3_A/I FAQ
1.How can I place an order for SM6T22CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CAHM3_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 SM6T22CAHM3_A/I reliable?
The price and inventory of SM6T22CAHM3_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 SM6T22CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T22CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CAHM3_A/I?
SM6T22CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CAHM3_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 SM6T22CAHM3_A/I?
For technical support, including SM6T22CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CAHM3_A/I requirements.
6.How does Aetrix verify that SM6T22CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T22CAHM3_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 SM6T22CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T22CAHM3_A/I?
All SM6T22CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CAHM3_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 SM6T22CAHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T22CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CAHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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