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Vishay General Semiconductor - Diodes Division SMC3K28CA-M3/57
- Part No.:
- SMC3K28CA-M3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K28CA-M3/57.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,524
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Product details
Overview
SMC3K28CA-M3/57 from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) designed for high-energy surge protection in power and signal lines. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 45.4 V under 66.1 A surge current, and features a 28 V stand-off voltage with 2.0 μA max reverse leakage - deployed in automotive sensor interfaces and industrial motor drive protection circuits.
For engineers reviewing the SMC3K28CA-M3/57 datasheet, SMC3K28CA-M3/57 pinout, SMC3K28CA-M3/57 application, or SMC3K28CA-M3/57 equivalent, key selection criteria include verified bidirectional clamping performance, AEC-Q101 qualification status, SMC (DO-214AB) package thermal derating above 25 °C, and compatibility with J-STD-002 solderability standards.
Technical Context
This TVS diode operates exclusively in bidirectional polarity with no polarity marking, enabling symmetric clamping on AC-coupled or differential signal paths. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching transients and lightning-induced surges without oscillation or latch-up.
The device is rated for -55 °C to +150 °C junction temperature, meets MSL level 1 per J-STD-020, and uses matte tin-plated leads compliant with JESD 22-B102 solderability and JESD 201 class 2 whisker testing - confirming suitability for reflow-only assembly in automotive-grade production.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains single high-energy surges common in automotive load-dump and industrial relay coil flyback events |
| Stand-off Voltage (VWM) | 28 V - defines maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 31.1–34.4 V at 1.0 mA - ensures reliable turn-on margin above VWM for stable protection threshold |
| Clamping Voltage (VC) | 45.4 V at 66.1 A IPPM - limits downstream voltage stress during worst-case surge conditions |
| Max Reverse Leakage (ID) | 2.0 μA at 28 V - minimizes standby power loss in battery-powered or low-power sensor nodes |
| Junction Temperature Range | -55 °C to +150 °C - supports operation in under-hood automotive and industrial ambient environments |
| Package | SMC (DO-214AB) - standardized 8.0 mm × 8.0 mm copper pad layout for thermal management and IPC-compliant PCB design |
Pinout & Package
SMC3K28CA-M3/57 uses the SMC (DO-214AB) surface-mount package with two terminals: Cathode and Anode. As a bidirectional TVS, both terminals are functionally symmetrical - no polarity marking is applied, and either terminal may serve as input or return path in AC or differential configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry point (bidirectional) | Accepts transient energy from either polarity; connects to protected line or node |
| Cathode | Surge current return path (bidirectional) | Completes low-impedance path to ground or reference rail during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics use including engine control units and ADAS sensor modules |
| UL 497B recognition (E136766) | Meets safety requirements for telecom and industrial equipment surge protection circuits |
| Halogen-free, RoHS-compliant construction | Complies with environmental regulations for global OEM supply chains and end-of-life handling |
| MSL Level 1 moisture sensitivity | Enables standard reflow assembly without dry-pack or baking preconditioning |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time) |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and chassis ground, absorbing transients before they reach sensitive analog front-ends. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ESD up to ±25 kV contact discharge. |
Use Scenario: Safeguarding PLC digital I/O channels connected to solenoid valves and relay coils subject to inductive kickback. IC Role / Device Role / Timing Role: Transient shunt across output terminals to clamp flyback voltages exceeding MOSFET or optocoupler breakdown limits. Use Value: Prevents premature failure of isolation barriers and logic-level drivers during frequent switching cycles in factory automation systems. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge protection on Ethernet PHY power rails and data lines in PoE-enabled switches and routers. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed after DC-DC converter output to suppress coupling from primary-side transients and external lightning surges. Use Value: Limits voltage excursion to <45.4 V during 10/1000 μs surges, preserving 3.3 V/5 V logic supply stability and PHY IC reliability. |
Use Scenario: Input-stage overvoltage protection in universal-input AC/DC adapters for smart home devices and IoT gateways. IC Role / Device Role / Timing Role: Primary clamping device across bulk capacitor input, triggered by line surges exceeding 28 V RMS-derived peaks. Use Value: Absorbs 3000 W pulses without degradation, enabling compliance with UL 62368-1 Annex D and IEC 61000-4-5 Level 3 immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K28CAHM3/57 | AEC-Q101 qualified; identical electrical specs but enhanced reliability screening for automotive use | Required for new automotive designs where qualification traceability is mandated | Select when full AEC-Q101 documentation and lot-level test reports are contractually required |
| SMC3K28CA-M3/9A | Same electrical and mechanical specs; differs only in packaging (3500-unit 13" reel vs. 850-unit 7" reel) | Suitable for high-volume SMT production lines using larger tape-and-reel formats | Choose based on pick-and-place machine feed configuration and production batch size |
Compared with SMC3K28CA-M3/57, the HM3 variant adds automotive qualification evidence without altering clamping behavior, while the /9A version offers logistics scalability - neither changes circuit design or layout, but affects compliance scope and procurement planning.
Availability
SMC3K28CA-M3/57 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive I/O, and telecom line interface applications requiring stable component supply and long-term obsolescence management.
Supply support for SMC3K28CA-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 reliability and application-specific validation.
The SMC3KxxCA series targets high-energy transient suppression in harsh-environment electronics, with design focus on automotive, industrial, and telecom infrastructure where robustness against repetitive surge stress is critical.
FAQ
What is the clamping voltage of SMC3K28CA-M3/57 at its rated peak pulse current?
The SMC3K28CA-M3/57 has a maximum clamping voltage (VC) of 45.4 V when subjected to its peak pulse current (IPPM) of 66.1 A under the standard 10/1000 μs waveform. This value is measured at the device terminals and represents the upper voltage limit imposed on protected circuitry during a full-rated surge event. The SMC3K28CA-M3/57 maintains this clamping performance across its specified junction temperature range of -55 °C to +150 °C.
Is SMC3K28CA-M3/57 suitable for new automotive designs?
No - SMC3K28CA-M3/57 is marked "Not for New Designs" in the official Vishay documentation. For new automotive projects, Vishay recommends the AEC-Q101-qualified SMC3K28CAHM3/57 variant, which shares identical electrical characteristics but includes extended reliability testing and qualification reporting required by Tier 1 suppliers. The SMC3K28CA-M3/57 remains viable for legacy industrial or consumer designs where qualification documentation is not mandated.
What does the "M3" suffix indicate in SMC3K28CA-M3/57?
The "M3" suffix in SMC3K28CA-M3/57 denotes halogen-free, RoHS-compliant construction with commercial-grade reliability screening and compliance with JESD 201 class 2 whisker testing. It also indicates matte tin-plated leads meeting J-STD-002 solderability standards. This suffix distinguishes it from the "HM3" variant, which adds AEC-Q101 qualification for automotive use - the SMC3K28CA-M3/57 itself is not AEC-Q101 qualified.
Can SMC3K28CA-M3/57 be used in bidirectional signal lines such as RS-485 or CAN?
Yes - SMC3K28CA-M3/57 is explicitly designed for bidirectional operation and is commonly deployed on differential bus lines like RS-485 and CAN. Its symmetrical clamping characteristic ensures equal protection for both polarities without requiring orientation during placement. When used across A/B lines or between line and ground, the SMC3K28CA-M3/57 provides balanced transient suppression while maintaining signal integrity up to multi-Mbps data rates due to its low junction capacitance.
What is the thermal derating behavior of SMC3K28CA-M3/57 above 25 °C ambient?
The SMC3K28CA-M3/57 follows standard TVS derating curves: peak pulse power decreases linearly from 3000 W at 25 °C to approximately 1500 W at 125 °C junction temperature, per Figure 2 in the Vishay datasheet. Derating is based on initial junction temperature, not ambient alone - proper PCB copper area (0.31" × 0.31" recommended) and thermal vias are essential to maintain safe TJ. The SMC3K28CA-M3/57 must not exceed 150 °C maximum junction temperature under any operating condition.
SMC3K28CA-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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 66.1A
- 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)
SMC3K28CA-M3/57 FAQ
1.How can I place an order for SMC3K28CA-M3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K28CA-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 SMC3K28CA-M3/57 reliable?
The price and inventory of SMC3K28CA-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 SMC3K28CA-M3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K28CA-M3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K28CA-M3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K28CA-M3/57?
SMC3K28CA-M3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K28CA-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 SMC3K28CA-M3/57?
For technical support, including SMC3K28CA-M3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K28CA-M3/57 requirements.
6.How does Aetrix verify that SMC3K28CA-M3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K28CA-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 SMC3K28CA-M3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K28CA-M3/57?
All SMC3K28CA-M3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K28CA-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 SMC3K28CA-M3/57 part is unused and in its original packaging.
Return procedure for SMC3K28CA-M3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K28CA-M3/57 Tags
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