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Vishay General Semiconductor - Diodes Division SMC3K22CA-M3/57
- Part No.:
- SMC3K22CA-M3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K22CA-M3/57.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,147
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Product details
Overview
SMC3K22CA-M3/57 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), 24.4 V to 26.9 V breakdown voltage at 1 mA, 22 V stand-off voltage, 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 circuits.
For engineers reviewing the SMC3K22CA-M3/57 datasheet, SMC3K22CA-M3/57 pinout, SMC3K22CA-M3/57 application, or SMC3K22CA-M3/57 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, MSL level 1 moisture sensitivity, and compatibility with wave-soldering restrictions on PCB bottom side mounting.
Technical Context
The SMC3K22CA-M3/57 operates as a silicon avalanche diode-based TVS, delivering fast response time and low incremental surge resistance to limit transient overvoltages before they damage downstream components. Its bidirectional polarity enables symmetrical clamping of positive and negative surges without external polarity management.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and UL 497B safety recognition (E136766). The device is halogen-free, RoHS-compliant, and qualified per JESD 201 Class 2 whisker test - all confirmed for the M3 suffix variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains high-energy transients common in automotive load-dump and inductive switch-off events |
| Breakdown Voltage VBR | 24.4 V to 26.9 V at 1 mA - defines minimum voltage at which avalanche conduction begins, ensuring reliable triggering above system operating voltage |
| Stand-off Voltage VWM | 22 V - maximum continuous reverse working voltage; must exceed normal circuit operating voltage to prevent leakage-induced heating |
| Clamping Voltage VC | 35.5 V at 84.5 A - peak voltage seen by protected circuit during worst-case surge; determines safe margin for downstream component VDS/VCEO ratings |
| Operating Temperature Range | –55 °C to +150 °C - supports under-hood automotive environments and industrial control enclosures without derating |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad area recommendation for thermal dissipation |
| Polarity | Bidirectional - eliminates need for orientation-specific placement; symmetric protection for AC-coupled or floating signal lines |
Pinout & Package
SMC3K22CA-M3/57 uses the standard SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Avalanche junction anode connection | Not applicable - bidirectional device has no functional cathode/anode; terminals are electrically symmetric |
| Anode (unmarked end) | Avalanche junction cathode connection | Not applicable - same as above; both terminals behave identically under reverse or forward surge conditions |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional polarity only | Eliminates orientation-dependent assembly errors and enables single-part protection for differential or AC-coupled nodes |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications requiring extended temperature cycling, humidity bias, and mechanical shock robustness |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow without baking; compatible with standard SMT assembly lines up to 260 °C peak |
| UL 497B recognition (E136766) | Meets safety agency requirements for transient protection in telecom and industrial equipment with certified isolation barriers |
| Halogen-free & RoHS-compliant (M3) | Complies with environmental regulations for consumer, industrial, and automotive electronics without compromising surge performance |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 24 V DC power rails feeding ECUs, body controllers, and lighting modules against load-dump and jump-start transients. IC Role / Device Role: Primary clamping element placed directly across input terminals upstream of DC-DC converters and LDOs. Use Value: Clamps 35.5 V at 84.5 A, maintaining safe voltage margin below 40 V-rated input capacitors and regulators in 24 V systems. |
Use Scenario: Surge suppression on three-phase inverter DC bus inputs exposed to regenerative braking energy and contactor bounce. IC Role / Device Role: Bidirectional transient shunt mounted between +BUS and –BUS to absorb bidirectional energy spikes. Use Value: 3000 W peak pulse rating handles repetitive 10/1000 μs surges common in motor drive fault conditions without degradation. |
| Automotive Sensor Signal Lines | Telecom Interface Protection |
Use Scenario: Protection of LIN/CAN physical layer signal lines in vehicle door modules and seat control units. IC Role / Device Role: Low-capacitance TVS placed inline with data lines to suppress ESD and coupled transients without distorting signal integrity. Use Value: Bidirectional clamping ensures immunity to both positive and negative ESD events while preserving signal symmetry on differential pairs. |
Use Scenario: Secondary-level surge protection on Ethernet PHY or RS-485 transceiver I/O pins in outdoor base stations and network switches. IC Role / Device Role: Standoff-voltage-matched TVS deployed after primary gas discharge tube (GDT) to refine clamping and limit let-through voltage. Use Value: 22 V stand-off voltage aligns with 24 V telecom supply rails, enabling coordination with upstream GDTs for staged protection architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K22CAHM3/57 | AEC-Q101 qualified version with identical electrical specs; HM3 suffix denotes automotive qualification grade | Required for new automotive designs where AEC-Q101 compliance is mandatory; M3 is commercial grade only | Select HM3 when qualifying for production in automotive OEM programs; M3 remains valid for industrial or legacy replacement use |
| SMC3K24CA-M3/57 | Higher VBR (26.7–29.5 V) and VWM (24 V); clamps at 38.9 V @ 77.1 A | Better suited for 24 V nominal systems with higher tolerance for let-through voltage; less margin for 22 V rail operation | Choose SMC3K24CA-M3/57 if system operating voltage exceeds 22 V or requires tighter VWM/VBR ratio |
Compared with SMC3K22CA-M3/57, the HM3 variant adds formal automotive qualification without electrical change, while SMC3K24CA-M3/57 trades lower clamping voltage for higher stand-off - making the original optimal for 22 V rail protection with minimal let-through.
Availability
SMC3K22CA-M3/57 is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, and telecom interface protection requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K22CA-M3/57 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 high-reliability, high-power, and automotive-qualified solutions.
The SMC3KxxCA series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in harsh environments including automotive, industrial, and telecom infrastructure where 3000 W surge handling and AEC-Q101 compliance are critical.
FAQ
What does the "M3" suffix mean in SMC3K22CA-M3/57?
The "M3" suffix in SMC3K22CA-M3/57 indicates a halogen-free, RoHS-compliant, commercial-grade variant that meets JESD 201 Class 2 whisker test requirements. It is not AEC-Q101 qualified - that designation applies only to the HM3 suffix. The M3 version is intended for industrial and consumer applications where automotive qualification is not required, and it ships in 7-inch tape-and-reel packaging (57 code).
Is SMC3K22CA-M3/57 suitable for automotive applications?
SMC3K22CA-M3/57 is not AEC-Q101 qualified and therefore not recommended for new automotive designs. However, it remains suitable for legacy automotive repair, aftermarket modules, or non-safety-critical subsystems where qualification is not mandated. For production automotive use, Vishay specifies SMC3K22CAHM3/57 as the qualified alternative.
What is the clamping voltage of SMC3K22CA-M3/57 and why does it matter?
The SMC3K22CA-M3/57 clamps to 35.5 V at its rated peak pulse current of 84.5 A (10/1000 μs waveform). This value defines the maximum voltage imposed on protected circuitry during a surge event - critical for ensuring downstream components like MOSFETs or regulators remain within their absolute maximum voltage ratings. Exceeding this clamping voltage risks catastrophic failure.
Can SMC3K22CA-M3/57 be used in bidirectional signal line protection?
Yes - SMC3K22CA-M3/57 is inherently bidirectional and provides symmetrical clamping for both polarities, making it appropriate for protecting AC-coupled, differential, or floating signal lines such as LIN, CAN, or RS-485 interfaces. Its lack of polarity marking simplifies layout and eliminates orientation errors during automated placement.
What is the maximum operating temperature for SMC3K22CA-M3/57?
The SMC3K22CA-M3/57 has a specified operating junction and storage temperature range of –55 °C to +150 °C. This wide range supports deployment in under-hood automotive locations, industrial motor drives, and outdoor telecom equipment where ambient temperatures exceed 100 °C. Derating curves in the datasheet apply above 25 °C ambient.
SMC3K22CA-M3/57 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-M3/57 FAQ
1.How can I place an order for SMC3K22CA-M3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K22CA-M3/57 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-M3/57 reliable?
The price and inventory of SMC3K22CA-M3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K22CA-M3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K22CA-M3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K22CA-M3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K22CA-M3/57?
SMC3K22CA-M3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K22CA-M3/57 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-M3/57?
For technical support, including SMC3K22CA-M3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K22CA-M3/57 requirements.
6.How does Aetrix verify that SMC3K22CA-M3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K22CA-M3/57 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-M3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K22CA-M3/57?
All SMC3K22CA-M3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K22CA-M3/57, 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-M3/57 part is unused and in its original packaging.
Return procedure for SMC3K22CA-M3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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