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Vishay General Semiconductor - Diodes Division SM6T22CA-M3/5B
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- Part No.:
- SM6T22CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CA-M3/5B.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,290
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Product details
Overview
SM6T22CA-M3/5B 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 1 mA), and clamping voltage of 30.6 V at 20 A. It protects signal lines and MOSFET gates in automotive sensor units and industrial control interfaces against ESD and inductive switching transients.
For engineers reviewing the SM6T22CA-M3/5B datasheet, SM6T22CA-M3/5B pinout, SM6T22CA-M3/5B application, or SM6T22CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, halogen-free RoHS compliance (M3 suffix), AEC-Q101 qualification readiness, and SMB package thermal performance under repetitive surge conditions.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR, VC, and IPPM specifications in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1 μA at 18.8 V) and low dynamic impedance during transient events.
The device is optimized for surface-mount automated placement on PCBs with minimum 5.0 mm × 5.0 mm copper pads per terminal, delivering RθJA = 100 °C/W and RθJL = 20 °C/W for reliable thermal management in high-density layouts.
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 for bidirectional overvoltage protection |
| 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 limiting downstream IC stress during surge |
| PPPM | 600 W - peak transient energy absorption capacity without failure under standardized waveform |
| IFSM | Not applicable - bidirectional device has no defined forward surge rating |
| TJ range | −65 °C to +150 °C - enables operation in under-hood automotive and industrial ambient environments |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline with 2.20 mm height and 5.59 mm body length |
Pinout & Package
SM6T22CA-M3/5B uses an SMB (DO-214AA) surface-mount package with two terminals: no polarity marking (bidirectional), symmetrical construction, and matte tin-plated leads compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional current path | Either terminal serves as anode or cathode depending on instantaneous polarity - no fixed polarity assignment |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and heat conduction to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges in automotive ECUs |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and environmental compliance for global OEM programs |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture-induced popcorn failure |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes voltage overshoot during fast transients, reducing risk of gate oxide rupture in protected MOSFETs |
| AEC-Q101 qualification pathway | Base P/NHM3_X variant available - allows drop-in qualification upgrade for automotive safety-critical modules |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., temperature, pressure) from load-dump and inductive kickback in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Limits induced voltage to ≤30.6 V during 20 A surge, preserving integrity of 3.3 V/5 V microcontrollers and ADC front-ends. | 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 optocoupler inputs or discrete transistor bases to absorb repetitive 600 W pulses. Use Value: Maintains <1 μA leakage at 18.8 V operating voltage, preventing false triggering while enabling fast response (<1 ns) to transients. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side transient suppression on USB-C PD and AC/DC adapter outputs subject to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Low-inductance SMB-mounted clamp between VBUS and GND to limit overshoot during plug insertion. Use Value: Achieves 30.6 V clamping at 20 A with <20 pF junction capacitance - avoids signal integrity degradation on high-speed data lines. | Use Scenario: Primary protection stage on Ethernet PHY or DSL line interface cards exposed to lightning-induced surges per ITU-T K.20/21. IC Role / Device Role / Timing Role: First-line bidirectional suppressor before gas discharge tube (GDT) or MOV secondary protection. Use Value: Withstands 1000+ 600 W surges without parameter shift, ensuring long-term reliability in telecom central office deployments. |
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 | Lower peak power (400 W), same SMB package and VBR range, higher VC (35.5 V at 17.1 A) | Limited to lower-energy transients; not suitable for ISO 7637-2 Pulse 5a load-dump simulation | Select SMAJ22CA only when system-level surge testing requires ≤400 W margin and cost optimization is prioritized |
| 1.5KE22CA | Higher peak power (1500 W), axial DO-201 package, slower response due to higher parasitic inductance | Requires through-hole mounting; incompatible with automated SMT lines and space-constrained PCBs | Choose 1.5KE22CA only for legacy through-hole designs where board real estate and assembly method preclude SMB use |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CA-M3/5B delivers optimal balance of 600 W surge handling, SMT compatibility, and low-profile SMB packaging - making it the preferred choice for new automotive and industrial designs requiring halogen-free compliance and AEC-Q101 upgrade path.
Availability
SM6T22CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, consumer power adapter interfaces, and telecom line card surge suppression requiring stable component supply and halogen-free compliance.
Supply support for SM6T22CA-M3/5B 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 optimization.
The SM6T Series was engineered for high-reliability transient suppression in space-constrained, thermally demanding environments - targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 readiness are critical.
FAQ
What does the "CA" suffix indicate in SM6T22CA-M3/5B?
The "CA" suffix in SM6T22CA-M3/5B denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression in both forward and reverse directions. This eliminates polarity concerns during PCB layout and enables use in AC-coupled or differential signal paths. The SM6T22CA-M3/5B achieves identical breakdown (20.9–23.1 V) and clamping (30.6 V at 20 A) characteristics regardless of voltage polarity applied across its terminals.
Is SM6T22CA-M3/5B qualified to AEC-Q101?
SM6T22CA-M3/5B itself is the commercial-grade halogen-free variant (M3 suffix); however, Vishay offers the AEC-Q101 qualified version under ordering code SM6T22CAHM3_B/I (with HM3 suffix and revision identifier). The SM6T22CA-M3/5B shares identical electrical and thermal specifications with its AEC-Q101 counterpart - allowing seamless qualification migration by updating only the suffix and reel packaging code.
What is the maximum clamping voltage of SM6T22CA-M3/5B under standard test conditions?
The maximum clamping voltage of SM6T22CA-M3/5B is 30.6 V, measured at a peak pulse current (IPPM) of 20 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range (−65 °C to +150 °C) and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events.
Can SM6T22CA-M3/5B replace unidirectional TVS diodes like SM6T22A-M3/5B?
No - SM6T22CA-M3/5B is strictly bidirectional and cannot substitute for unidirectional types such as SM6T22A-M3/5B in DC-biased circuits requiring asymmetric clamping. Unidirectional devices provide forward conduction and reverse blocking, whereas SM6T22CA-M3/5B conducts equally in both directions. Substitution would cause unintended current flow in DC paths and compromise circuit functionality.
What PCB pad layout is recommended for optimal thermal performance of SM6T22CA-M3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area for each terminal of SM6T22CA-M3/5B to achieve the rated RθJA = 100 °C/W. The pad layout must follow the SMB (DO-214AA) footprint with 2.18 mm minimum pad width and 5.59 mm reference body length. Thermal vias under pads are recommended for high-power cycling applications to reduce junction-to-PCB thermal resistance.
SM6T22CA-M3/5B 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:
- 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-M3/5B FAQ
1.How can I place an order for SM6T22CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CA-M3/5B 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 SM6T22CA-M3/5B reliable?
The price and inventory of SM6T22CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T22CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SM6T22CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CA-M3/5B?
SM6T22CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CA-M3/5B 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 SM6T22CA-M3/5B?
For technical support, including SM6T22CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CA-M3/5B requirements.
6.How does Aetrix verify that SM6T22CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T22CA-M3/5B 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 SM6T22CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SM6T22CA-M3/5B?
All SM6T22CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CA-M3/5B, 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 SM6T22CA-M3/5B part is unused and in its original packaging.
Return procedure for SM6T22CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CA-M3/5B Tags
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