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Vishay General Semiconductor - Diodes Division SMC3K22CA-M3/9A
- Part No.:
- SMC3K22CA-M3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K22CA-M3/9A.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,804
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Product details
Overview
SMC3K22CA-M3/9A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 22 V stand-off voltage, 24.4–26.9 V breakdown voltage at 1 mA, and clamps to ≤35.5 V at 84.5 A peak surge current. It protects MOSFETs and ICs against inductive switching transients in automotive power electronics.
For engineers reviewing the SMC3K22CA-M3/9A datasheet, SMC3K22CA-M3/9A pinout, SMC3K22CA-M3/9A application, or SMC3K22CA-M3/9A equivalent, key selection criteria include clamping voltage vs. surge current, bidirectional polarity, AEC-Q101 qualification, MSL level 1 moisture sensitivity, and halogen-free RoHS-compliant construction.
Technical Context
The SMC3K22CA-M3/9A operates as a silicon avalanche diode-based TVS, leveraging fast response time and low incremental surge resistance to limit transient overvoltages before they damage downstream circuitry. Its bidirectional configuration enables symmetrical clamping across both polarities without external polarity management.
Designed for high-energy transients, it delivers 3000 W peak pulse power per 10/1000 μs waveform with derating above 25 °C ambient, and supports junction temperatures from –55 °C to +150 °C. It meets UL 497B safety recognition (E136766) and J-STD-020 MSL level 1 reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse working voltage before leakage exceeds 2 μA; defines safe operating threshold in normal circuit conditions. |
| VBR min/max | 24.4 V / 26.9 V at 1 mA - Verified avalanche breakdown range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤35.5 V at 84.5 A - Clamped voltage under full 3000 W surge; determines maximum stress on protected device. |
| PPPM | 3000 W (10/1000 μs) - Peak pulse power handling capability; defines energy absorption capacity for lightning or inductive kick events. |
| TJ max | +150 °C - Maximum junction temperature; sets thermal design margin for PCB layout and power dissipation planning. |
| Polarity | Bidirectional - Enables protection of AC-coupled or floating signal lines without polarity orientation constraints. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad area recommendation for thermal performance. |
Pinout & Package
SMC3K22CA-M3/9A uses the SMC (DO-214AB) package: a 2-terminal, non-polarized, surface-mount plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Transient conduction path | Both terminals function identically in bidirectional mode; no fixed anode/cathode assignment - symmetric clamping behavior. |
| Cathode/Anode (unmarked) | Transient conduction path | Second terminal completes the bidirectional avalanche path; identical electrical role to first terminal under reverse or forward surge. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and HTRB testing - suitable for engine control and ADAS power rails. |
| MSL level 1 (J-STD-020) | Unlimited floor life at ≤30 °C/60 % RH; supports standard reflow without baking - simplifies SMT manufacturing flow. |
| UL 497B recognized (E136766) | Meets safety requirements for telecom and industrial signal line protection - enables compliance in certified end equipment. |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets environmental regulations for commercial applications; JESD 201 class 2 whisker resistance confirmed. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients - improves clamping precision for sensitive gate drivers and sensor interfaces. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on power input rail upstream of DC-DC converters and microcontrollers. Use Value: Limits transient excursions to ≤35.5 V at 84.5 A, preventing latch-up or gate oxide failure in downstream PMICs and MCUs. | Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional shunt protector placed directly at connector interface before signal conditioning amplifier. Use Value: Clamps ±15 kV contact ESD (IEC 61000-4-2) with sub-nanosecond response, preserving signal integrity and ADC accuracy. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Surge suppression on POTS or Ethernet PHY lines exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage transient limiter in hybrid protection circuits with gas discharge tubes and series impedance. Use Value: Absorbs up to 3000 W (10/1000 μs) while maintaining <100 pF junction capacitance - avoids signal distortion in broadband lines. | Use Scenario: Input-stage protection in wall-mounted AC/DC adapters subjected to mains-borne surges. IC Role / Device Role / Timing Role: Secondary clamp after MOV, providing precise low-clamp-voltage backup for rectifier bridge and primary-side controller. Use Value: Reduces clamping voltage by ~30 % versus standard 22 V Zener diodes - lowers stress on primary FET and improves surge pass/fail margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K22CAHM3/9A | AEC-Q101 qualified; identical electrical specs; HM3 suffix denotes automotive qualification grade. | Required for automotive OEM designs requiring AEC-Q101 compliance; same footprint and clamping behavior. | Select SMC3K22CAHM3/9A when automotive qualification is mandatory; otherwise SMC3K22CA-M3/9A suffices for commercial use. |
| SMAJ22CA | Lower peak power (400 W); SMA package (smaller size, lower thermal mass); same VWM/VBR range. | Suitable for space-constrained consumer devices with lower surge exposure; not rated for 3000 W events. | Choose SMAJ22CA only where board space is critical and surge threat level is limited to IEC 61000-4-5 Level 3 (1 kV/2 Ω). |
Compared with SMC3K22CA-M3/9A, SMC3K22CAHM3/9A adds AEC-Q101 validation without electrical or mechanical change, while SMAJ22CA trades 7.5× lower surge capacity for 40 % smaller footprint - enabling tiered protection strategies across automotive, industrial, and consumer segments.
Availability
SMC3K22CA-M3/9A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom line protection, and consumer power adapter input stages requiring stable component supply and long-term manufacturability.
Supply support for SMC3K22CA-M3/9A 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMC3KxxCA series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where robustness and repeatable clamping performance are critical.
FAQ
What is the maximum clamping voltage of the SMC3K22CA-M3/9A under full-rated surge current?
The SMC3K22CA-M3/9A clamps to a maximum of 35.5 V when subjected to its rated peak pulse current of 84.5 A (10/1000 μs waveform). This value is guaranteed per the Vishay datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMC3K22CA-M3/9A achieves this with low incremental surge resistance, ensuring minimal overshoot beyond the clamping plateau.
Is the SMC3K22CA-M3/9A suitable for automotive applications?
The SMC3K22CA-M3/9A is halogen-free, RoHS-compliant, and meets MSL level 1 and UL 497B requirements, but it is not AEC-Q101 qualified. For automotive applications requiring formal qualification, the SMC3K22CAHM3/9A variant must be used. The SMC3K22CA-M3/9A remains appropriate for non-safety-critical commercial or industrial systems where AEC-Q101 is not mandated.
What does the "-M3/9A" suffix indicate in SMC3K22CA-M3/9A?
The "-M3" suffix denotes halogen-free, RoHS-compliant, commercial-grade construction meeting JESD 201 class 2 whisker resistance. The "/9A" indicates packaging in 13-inch diameter plastic tape and reel, containing 3500 units. This differs from "/57", which specifies 7-inch reels with 850 units. Both share identical electrical and thermal specifications.
Does the SMC3K22CA-M3/9A have polarity markings on the package?
No, the SMC3K22CA-M3/9A has no polarity markings because it is a bidirectional TVS device. The SMC (DO-214AB) case is symmetric, and both terminals perform identically under positive or negative transients. This eliminates orientation concerns during placement and supports AC-coupled or floating signal line protection without additional circuitry.
What is the junction temperature range for reliable operation of the SMC3K22CA-M3/9A?
The SMC3K22CA-M3/9A supports continuous operation across a junction temperature range of –55 °C to +150 °C. This wide range enables deployment in under-hood automotive modules, industrial motor drives, and outdoor telecom enclosures. Derating of peak pulse power applies above 25 °C ambient, per the published derating curve in the Vishay datasheet for SMC3K22CA-M3/9A.
SMC3K22CA-M3/9A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 84.5A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K22CA-M3/9A FAQ
1.How can I place an order for SMC3K22CA-M3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K22CA-M3/9A 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 SMC3K22CA-M3/9A reliable?
The price and inventory of SMC3K22CA-M3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K22CA-M3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K22CA-M3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K22CA-M3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K22CA-M3/9A?
SMC3K22CA-M3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K22CA-M3/9A 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 SMC3K22CA-M3/9A?
For technical support, including SMC3K22CA-M3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K22CA-M3/9A requirements.
6.How does Aetrix verify that SMC3K22CA-M3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K22CA-M3/9A 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 SMC3K22CA-M3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K22CA-M3/9A?
All SMC3K22CA-M3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K22CA-M3/9A, 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 SMC3K22CA-M3/9A part is unused and in its original packaging.
Return procedure for SMC3K22CA-M3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K22CA-M3/9A Tags
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