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Vishay General Semiconductor - Diodes Division SM6T22CA-M3/52
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- Part No.:
- SM6T22CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CA-M3/52.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,960
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Product details
Overview
SM6T22CA-M3/52 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), 30.6 V maximum clamping voltage (VC) at 20 A IPPM, 600 W peak pulse power (10/1000 μs), <1 μA reverse leakage at 18.8 V stand-off, and AEC-Q101 qualification readiness via HM3 suffix. Used to protect automotive sensor interfaces and industrial I/O lines.
For engineers reviewing the SM6T22CA-M3/52 datasheet, SM6T22CA-M3/52 pinout, SM6T22CA-M3/52 application, or SM6T22CA-M3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.32), halogen-free RoHS compliance (M3 suffix), SMB thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T22CA-M3/52 operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown and low leakage (<1 μA at VWM = 18.8 V), while low inductance supports fast response to sub-microsecond ESD events.
Rated for 600 W peak pulse power under 10/1000 μs waveform and 150 °C max junction temperature, it delivers robust protection in automotive and industrial environments where inductive switching surges and lightning-induced transients exceed IC tolerance thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V - Ensures reliable conduction onset above 18.8 V operating voltage, preventing false triggering during normal operation. |
| VC @ 20 A | 30.6 V - Clamps transient energy to safe levels for downstream 3.3 V or 5 V logic, MOSFET gates, and analog sensors. |
| PPPM | 600 W - Handles high-energy surges from inductive loads (e.g., solenoids, relays) without degradation. |
| VWM | 18.8 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; sets upper limit for protected line DC bias. |
| ID @ VWM | <1 μA - Minimizes standby power loss and avoids loading of high-impedance signal paths (e.g., sensor outputs). |
| RθJA | 100 °C/W - Requires minimum 5.0 mm × 5.0 mm copper pad per terminal for thermal derating above 25 °C ambient. |
| Package | SMB (DO-214AA) - Surface-mount footprint compatible with standard reflow profiles; meets UL 94 V-0 flammability. |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, no polarity marking for bidirectional operation. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); MSL Level 1, peak reflow 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; forms symmetrical clamping path with cathode. |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; identical electrical behavior to anode due to bidirectional design. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and leakage in both directions - eliminates need for polarity-aware layout on AC-coupled or differential lines. |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV surge) without failure when mounted per recommended pad layout. |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-J-STD-609 Class 3 material requirements and automotive environmental standards. |
| Low clamping ratio (VC/VBR) | ≈1.32 - Delivers tighter voltage limiting than unidirectional counterparts, reducing stress on protected ICs. |
| AEC-Q101 qualification path | HM3 variant available - enables use in automotive powertrain and body electronics requiring qualified components. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching PHY layer. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (75 V/100 ms) and IEC 61000-4-2 ±8 kV contact discharge. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected TVS across 24 V DC input terminals to absorb inductive kickback energy. Use Value: Prevents false triggering and latch-up in microcontroller GPIOs by limiting transient voltage to ≤30.6 V. |
| Consumer USB Port ESD Protection | Telecom Line Interface Protection |
Use Scenario: Shielding USB 2.0 D+/D− lines in set-top boxes and smart displays from human-body-model ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed adjacent to connector to minimize signal distortion. Use Value: Achieves <10 pF junction capacitance at zero bias - preserves signal rise/fall times up to 480 Mbps. | Use Scenario: Protecting Ethernet PHY front-end and telephone line interface circuits from lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge suppression stage before secondary filtering and isolation transformers. Use Value: Withstands 10/1000 μs waveform surges up to 600 W without parametric shift or catastrophic failure. |
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 SMB package, but lower PPPM (400 W), higher VC (35.5 V @ 17.1 A), non-AEC-Q101 path | Limited to commercial-grade consumer/industrial use; insufficient for automotive surge test margins | Select SMAJ22CA only if system-level surge testing is ≤IEC 61000-4-5 Level 3 and AEC-Q101 not required. |
| 1.5KE22CA | DO-201 package (axial lead), 1500 W PPPM, higher VC (36.5 V @ 41.1 A), through-hole mounting | Not suitable for automated SMT assembly; requires PCB real estate and manual soldering | Choose 1.5KE22CA only for prototyping or legacy through-hole designs where board space and assembly method permit. |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CA-M3/52 offers superior SMT manufacturability, tighter clamping (30.6 V vs. ≥35.5 V), halogen-free compliance, and direct path to AEC-Q101 qualification - making it optimal for high-volume automotive and industrial surface-mount systems.
Availability
SM6T22CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface circuits requiring stable component supply, consistent halogen-free compliance, and support for automated SMT production.
Supply support for SM6T22CA-M3/52 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, power handling, and automotive-grade qualification.
The SM6T Series is engineered specifically for robust transient suppression in harsh environments - targeting automotive electronics, industrial controls, and communication infrastructure where high-energy surge immunity and long-term stability are critical.
FAQ
What is the breakdown voltage range for SM6T22CA-M3/52?
The SM6T22CA-M3/52 has a specified breakdown voltage (VBR) range of 20.9 V to 23.1 V at 1.0 mA test current, measured per JEDEC standard. This range ensures consistent clamping onset across production lots and supports reliable protection of 18–20 V nominal circuits without premature conduction during normal operation.
Is SM6T22CA-M3/52 suitable for automotive applications?
Yes - the SM6T22CA-M3/52 uses the halogen-free, RoHS-compliant M3 suffix and shares the same die and qualification path as the AEC-Q101-qualified HM3 variants (e.g., SM6T22CAHM3_B/H). While the M3 version itself is not certified, its construction and test data align with automotive requirements, and Vishay offers drop-in HM3 equivalents for full qualification needs.
What is the maximum clamping voltage of SM6T22CA-M3/52 at rated peak pulse current?
The SM6T22CA-M3/52 exhibits a maximum clamping voltage (VC) of 30.6 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 20 A. This value is guaranteed per datasheet Figure 1 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does SM6T22CA-M3/52 have polarity markings on the package?
No - SM6T22CA-M3/52 is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical construction allows installation in either orientation, simplifying PCB layout and eliminating risk of reverse-mount errors in AC-coupled or differential signal paths.
What is the thermal resistance junction-to-ambient for SM6T22CA-M3/52?
The SM6T22CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB and natural convection; derating is required above 25 °C ambient per Figure 2 in the datasheet.
SM6T22CA-M3/52 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T22CA-M3/52 FAQ
1.How can I place an order for SM6T22CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CA-M3/52 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 SM6T22CA-M3/52 reliable?
The price and inventory of SM6T22CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T22CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SM6T22CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CA-M3/52?
SM6T22CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CA-M3/52 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 SM6T22CA-M3/52?
For technical support, including SM6T22CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CA-M3/52 requirements.
6.How does Aetrix verify that SM6T22CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T22CA-M3/52 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 SM6T22CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SM6T22CA-M3/52?
All SM6T22CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CA-M3/52, 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 SM6T22CA-M3/52 part is unused and in its original packaging.
Return procedure for SM6T22CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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