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Vishay General Semiconductor - Diodes Division SMC5K28A-M3/I
- Part No.:
- SMC5K28A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K28A-M3/I.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,615
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Product details
Overview
SMC5K28A-M3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR at 1 mA), 45.4 V clamping voltage (VC) at 110 A peak pulse current (10/1000 μs), and 5000 W peak pulse power rating.
For engineers reviewing the SMC5K28A-M3/I datasheet, SMC5K28A-M3/I pinout, SMC5K28A-M3/I application, or SMC5K28A-M3/I equivalent, this device is selected for high-energy surge suppression on DC power rails and signal lines in automotive ECUs, industrial motor drives, and telecom interface circuits where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are not required (SMC5K28A is industrial grade only).
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias it presents <1 μA leakage at 28 V; during transients exceeding VBR, it avalanches to clamp voltage at ≤45.4 V while conducting up to 110 A (10/1000 μs). Its unidirectional polarity-cathode marked by band-enables placement on positive-rail or signal-line applications with defined ground reference.
Thermal design relies on RthJA = 90 °C/W (FR4, 2 oz Cu) and RthJM = 4.0 °C/W, supporting continuous operation up to TJ = 150 °C. It meets IEC 61000-4-2 ESD immunity (30 kV contact/air) and UL 497B recognition (E136766), with halogen-free, RoHS-compliant construction per JESD 201 Class 2 whisker test.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Tight breakdown tolerance ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 45.4 V at 110 A (10/1000 μs) - Clamping voltage directly limits protected circuit stress during surge events. |
| PPPM | 5000 W - Peak pulse power handling capacity determines survivability against lightning-induced surges (IEC 61000-4-5 Level 4). |
| TJ max | +150 °C - Enables use in under-hood automotive modules and industrial enclosures without derating below ambient. |
| ESD Rating | 30 kV HBM (contact & air) - Provides system-level ESD robustness per IEC 61000-4-2 without external shielding. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 3.20 mm × 6.22 mm footprint and 2.06 mm height for automated assembly. |
Pinout & Package
SMC5K28A-M3/I uses the industry-standard SMC (DO-214AB) package: cathode indicated by a color band on the body; anode and cathode terminals are formed by the two gull-wing leads extending from opposite ends of the molded case. The package complies with JEDEC MO-136AC and supports reflow soldering per J-STD-020 MSL Level 1 (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to circuit ground or return path; completes shunt conduction path during avalanche. |
| Cathode | High-side connection point | Connected to protected line (e.g., +24 V rail or signal); polarity marking ensures correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables precise protection on DC-biased lines without forward-conduction interference during normal operation. |
| 45.4 V clamping at 110 A | Delivers low clamping ratio (VC/VWM ≈ 1.62), minimizing voltage overshoot on 24 V systems during 10/1000 μs surges. |
| 90 °C/W thermal resistance | Allows PCB layout with standard 2 oz copper pads to sustain repeated surge duty cycles without thermal runaway. |
| Halogen-free & RoHS | Meets global environmental compliance requirements (per Vishay Doc. 99912) without compromising surge performance. |
| 30 kV ESD immunity | Eliminates need for additional ESD protection components on board-level interfaces subject to handling discharge. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting 24 V supply input of BCM microcontroller from load-dump transients and relay coil flyback. IC Role / Device Role / Timing Role: Shunt TVS placed between VIN and GND, clamping spikes within 1 ns to prevent MCU brownout or latch-up. Use Value: Withstands 5000 W surges per ISO 7637-2 Pulse 5a, enabling single-device protection without series impedance or filtering. |
Use Scenario: Guarding 24 V digital input channel of PLC against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Unidirectional TVS connected across input terminal and common rail to absorb inductive switching energy. Use Value: 45.4 V clamping ensures downstream optocoupler or Schmitt trigger remains within absolute maximum ratings during 1 kV/500 A surge events. |
| Telecom Power Feeding Interface | Consumer Appliance Motor Driver |
|
Use Scenario: Safeguarding PoE-powered equipment front-end from Ethernet cable-induced surges and lightning coupling. IC Role / Device Role / Timing Role: TVS mounted at RJ45 connector feed-through to clamp common-mode transients before DC-DC converter input. Use Value: 5000 W rating handles IEC 61000-4-5 Combination Wave (1.2/50 μs & 8/20 μs) up to Level 4 without degradation. |
Use Scenario: Suppressing back-EMF from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Mounted across motor terminals to divert inductive kickback energy away from H-bridge MOSFETs. Use Value: Low incremental surge resistance minimizes voltage overshoot, reducing MOSFET VDS stress and preventing avalanche failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-M3/52 | Same VWM (28 V), lower PPPM (600 W), SMB package (smaller footprint, higher RthJA = 110 °C/W). | Lower surge capacity suits consumer-grade 24 V sensors; insufficient for industrial motor drive snubbing. | Select SMBJ28A-M3/52 when space is constrained and surge energy is limited to <100 W·s. |
| SMC5K28CA-M3/I | Bidirectional variant (VWM = 28 V, symmetric clamping), same PPPM and package. | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs. | Choose SMC5K28CA-M3/I only if bidirectional protection is mandated by signal topology-not for DC rail use. |
Compared with SMBJ28A-M3/52 and SMC5K28CA-M3/I, the SMC5K28A-M3/I delivers 8.3× higher surge power handling than SMBJ28A while maintaining unidirectional precision for DC systems, and avoids unnecessary cost/complexity of bidirectional clamping where polarity is fixed.
Availability
SMC5K28A-M3/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, telecom power interfaces, and appliance motor control systems requiring stable component supply and consistent surge performance across production batches.
Supply support for SMC5K28A-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 is a global leader in discrete semiconductors, specializing in high-reliability diodes, rectifiers, and protection devices engineered for harsh environments and long service life.
The SMC5K28A-M3/I belongs to Vishay's TRANSZORB® TVS family, developed specifically for industrial and commercial applications demanding high-energy transient suppression without automotive qualification overhead.
FAQ
What is the maximum clamping voltage of the SMC5K28A-M3/I at its rated peak pulse current?
The SMC5K28A-M3/I has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated 110 A peak pulse current with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMC5K28A-M3/I maintains this clamping performance across its full operating junction temperature range (−55 °C to +150 °C).
Is the SMC5K28A-M3/I qualified to AEC-Q101?
No, the SMC5K28A-M3/I is not AEC-Q101 qualified. Per Vishay documentation, AEC-Q101 qualification applies only to SMC5K10A through SMC5K20A variants (with HM3 suffix). The SMC5K28A-M3/I is designated for industrial-grade applications and carries no automotive qualification. Engineers selecting the SMC5K28A-M3/I must verify suitability for non-automotive use cases such as industrial controls or telecom infrastructure.
What does the "-M3/I" suffix indicate in SMC5K28A-M3/I?
The "-M3" suffix denotes halogen-free, RoHS-compliant construction meeting JESD 201 Class 2 whisker resistance, while "/I" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This differs from "/H", which indicates 7-inch tape-and-reel (850 units). The SMC5K28A-M3/I is optimized for high-volume SMT assembly lines requiring large reels and environmentally compliant materials.
Can the SMC5K28A-M3/I be used in bidirectional signal protection applications?
No, the SMC5K28A-M3/I is a unidirectional TVS diode and must not be used for bidirectional signal lines such as RS-485 or CAN bus. Its cathode-band polarity requires connection with the cathode toward the protected line and anode to ground. For bidirectional protection, the SMC5K28CA-M3/I (complementary bidirectional variant) is specified. Using SMC5K28A-M3/I on AC-coupled signals risks forward conduction and permanent damage.
What is the thermal resistance junction-to-ambient for the SMC5K28A-M3/I in standard mounting?
The SMC5K28A-M3/I has a typical thermal resistance junction-to-ambient (RthJA) of 90 °C/W when mounted on a FR4 PCB with 2 oz copper per JEDEC 51-2A standard footprint. This value assumes no additional heatsinking and defines the steady-state temperature rise above ambient per watt of average power dissipation. For pulsed surge conditions, transient thermal impedance (per Fig. 6) governs short-duration heating behavior.
SMC5K28A-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:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC5K28A-M3/I FAQ
1.How can I place an order for SMC5K28A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K28A-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 SMC5K28A-M3/I reliable?
The price and inventory of SMC5K28A-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 SMC5K28A-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K28A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K28A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K28A-M3/I?
SMC5K28A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K28A-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 SMC5K28A-M3/I?
For technical support, including SMC5K28A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K28A-M3/I requirements.
6.How does Aetrix verify that SMC5K28A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K28A-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 SMC5K28A-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K28A-M3/I?
All SMC5K28A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K28A-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 SMC5K28A-M3/I part is unused and in its original packaging.
Return procedure for SMC5K28A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K28A-M3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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