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Vishay General Semiconductor - Diodes Division SMC5K28CA-M3/I
- Part No.:
- SMC5K28CA-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K28CA-M3/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,204
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Product details
Overview
SMC5K28CA-M3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 5000 W peak pulse power (10/1000 μs), 31.1–34.4 V breakdown voltage, and 45.4 V clamping voltage at 110 A. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMC5K28CA-M3/I datasheet, SMC5K28CA-M3/I pinout, SMC5K28CA-M3/I application, or SMC5K28CA-M3/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RthJA = 90 °C/W), clamping performance under 8/20 μs surges, and reel packaging details (13" tape, 3500 pcs).
Technical Context
This TVS operates bidirectionally with no cathode band, enabling symmetrical clamping across both polarities. Its low incremental surge resistance and fast response time ensure effective suppression of lightning-induced transients and inductive switching spikes on DC power rails and signal paths.
The device is rated for junction temperatures up to +175 °C and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility. Its 90 °C/W junction-to-ambient thermal resistance reflects standard FR4 PCB mounting per JEDEC 51-2A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.1 V / 34.4 V - defines reliable conduction onset under transient stress; ensures stable clamping before downstream component damage |
| VWM | 28 V - maximum continuous reverse operating voltage; sets safe DC bias margin for 24 V nominal systems |
| VC @ IPPM | 45.4 V @ 110 A (10/1000 μs) - actual clamped voltage during worst-case surge; determines protected circuit's overvoltage exposure |
| PPPM | 5000 W - peak pulse power handling capacity; supports robust protection against IEC 61000-4-5 level 4 surges |
| TJ max | +175 °C - maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments |
| RthJA | 90 °C/W - thermal resistance to ambient on standard FR4; informs heatsinking requirements for sustained surge duty cycles |
| ESD rating | ±30 kV HBM (contact/air) - exceeds IEC 61000-4-2 Level 4; provides system-level ESD immunity without external shielding |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction eliminates polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Both terminals conduct equally during positive/negative transients; no orientation required during placement |
| Case (cathode side) | Thermal interface | Exposed metal pad serves as primary heat path to PCB copper; critical for thermal derating above 25 °C |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications requiring zero defect reliability and extended temperature cycling |
| UL 497B recognized (E136766) | Meets safety standards for telecom and industrial equipment requiring certified transient protection components |
| 40 kW surge capability (8/20 μs) | Supports high-current lightning surge testing per IEC 61000-4-5 without degradation or failure |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for sensitive gate drivers |
| MSL Level 1, 260 °C peak | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure or delamination |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 24 V battery-fed ECUs and body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element on main power rail, placed upstream of DC-DC converters and microcontrollers. Use Value: Clamps to 45.4 V during 110 A surges, preventing overvoltage damage to 36 V-rated input stages while maintaining AEC-Q101 compliance. | Use Scenario: Surge suppression on AC line rectifier outputs feeding variable-frequency drives. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing repetitive switching spikes from IGBT snubbers and contactor bounce. Use Value: Withstands 5000 W pulses at 10/1000 μs and maintains <1 μA leakage at 28 V, ensuring minimal standby loss in always-on systems. |
| Telecom Power Feeds | Sensor Signal Line Protection |
Use Scenario: Input-stage protection for PoE-powered network switches exposed to induced surges on Ethernet cables. IC Role / Device Role / Timing Role: First-line defense on 48 V DC input, coordinated with upstream fuses and downstream TVS arrays. Use Value: Delivers ±30 kV HBM ESD immunity and 45.4 V clamping, preserving integrity of isolated DC-DC controllers and PHY interfaces. | Use Scenario: Bidirectional protection of analog sensor outputs (e.g., pressure, temperature) in harsh factory environments. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) shunt clamp on differential or single-ended signal traces. Use Value: Maintains signal fidelity with <1 μA leakage at 28 V and fast response to sub-100 ns transients, avoiding false triggering in precision ADC front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA-M3/5A | Lower peak pulse power (600 W vs. 5000 W); SMB (DO-214AA) package; same VWM/VBR range | Suitable for lower-energy surges (IEC 61000-4-2 only); not rated for IEC 61000-4-5 level 4 | Select when space-constrained layouts require smaller footprint and surge energy is limited to <100 A (10/1000 μs) |
| SMC5K28A-M3/I | Unidirectional version; identical package, power rating, and clamping; adds cathode band marking | Required where DC bias polarity is fixed and negative transients dominate (e.g., ground-referenced sensors) | Choose for unidirectional clamping needs; retains full 5000 W rating but lacks symmetrical protection for AC-coupled signals |
Compared with SMBJ28CA-M3/5A and SMC5K28A-M3/I, the SMC5K28CA-M3/I uniquely combines bidirectional operation, 5000 W surge capacity, and AEC-Q101 qualification-making it the only option among the three validated for automotive power rail protection under ISO 7637-2 Pulse 5a.
Availability
SMC5K28CA-M3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, telecom power supplies, and sensor interface circuits requiring stable component supply and long-term lifecycle support.
Supply support for SMC5K28CA-M3/I 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices for high-reliability applications.
The SMC5KxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, bidirectional surge protection in automotive, industrial, and telecom infrastructure where AEC-Q101 qualification and UL recognition are mandatory.
FAQ
What is the clamping voltage of the SMC5K28CA-M3/I at its rated peak pulse current?
The SMC5K28CA-M3/I has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 110 A under the 10/1000 μs waveform. This value is measured per Fig. 3 in the Vishay datasheet (Doc. #87024) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMC5K28CA-M3/I maintains this clamping performance across its full operating temperature range.
Is the SMC5K28CA-M3/I suitable for automotive applications?
Yes, the SMC5K28CA-M3/I is AEC-Q101 qualified and explicitly rated for automotive use per the Vishay datasheet. It supports junction temperatures up to +175 °C and meets MSL Level 1 for lead-free reflow, making it appropriate for engine control units, body electronics, and ADAS power supplies. The SMC5K28CA-M3/I also complies with ISO 7637-2 Pulse 5a test requirements when applied per recommended layout guidelines.
What does the "-M3/I" suffix indicate in SMC5K28CA-M3/I?
The "-M3" suffix denotes halogen-free, RoHS-compliant, industrial-grade construction with JESD 201 Class 2 whisker resistance. The "/I" indicates packaging in 13-inch diameter plastic tape and reel containing 3500 units-optimized for high-volume automated SMT assembly. This differs from "/H" (7-inch reel, 850 units) and confirms the SMC5K28CA-M3/I is supplied in full-production reel format.
How does the SMC5K28CA-M3/I compare to unidirectional TVS diodes with the same standoff voltage?
The SMC5K28CA-M3/I provides symmetrical clamping for both positive and negative transients due to its bidirectional design, whereas unidirectional variants like SMC5K28A-M3/I only protect against one polarity. This makes the SMC5K28CA-M3/I ideal for AC-coupled lines, floating grounds, or systems with undefined voltage reference polarity. Its clamping voltage and power rating match the unidirectional version, but the SMC5K28CA-M3/I requires no polarity orientation during placement.
What is the thermal resistance of the SMC5K28CA-M3/I, and how does it affect layout?
The SMC5K28CA-M3/I has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A. This value assumes minimal copper area; increasing thermal pad size or adding internal ground planes reduces effective RthJA. For repeated surge events, thermal design must ensure junction temperature stays below +175 °C-requiring careful attention to PCB copper mass and airflow. The SMC5K28CA-M3/I's RthJM is 4.0 °C/W, indicating efficient heat transfer to the mounting surface.
SMC5K28CA-M3/I 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):
- 110A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC5K28CA-M3/I FAQ
1.How can I place an order for SMC5K28CA-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K28CA-M3/I 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 SMC5K28CA-M3/I reliable?
The price and inventory of SMC5K28CA-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC5K28CA-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K28CA-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K28CA-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K28CA-M3/I?
SMC5K28CA-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K28CA-M3/I 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 SMC5K28CA-M3/I?
For technical support, including SMC5K28CA-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K28CA-M3/I requirements.
6.How does Aetrix verify that SMC5K28CA-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K28CA-M3/I 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 SMC5K28CA-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K28CA-M3/I?
All SMC5K28CA-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K28CA-M3/I, 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 SMC5K28CA-M3/I part is unused and in its original packaging.
Return procedure for SMC5K28CA-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K28CA-M3/I Tags
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