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Vishay General Semiconductor - Diodes Division SMC5K28CA-M3/H
- Part No.:
- SMC5K28CA-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K28CA-M3/H.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,282
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Product details
Overview
SMC5K28CA-M3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, with 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), and 5000 W peak pulse power (10/1000 μs). It clamps transients to 45.4 V at 110 A, and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SMC5K28CA-M3/H datasheet, SMC5K28CA-M3/H pinout, SMC5K28CA-M3/H application, or SMC5K28CA-M3/H equivalent, key selection criteria include clamping voltage at rated IPPM, bidirectional surge capability, MSL Level 1 reflow compatibility, and compliance with IEC 61000-4-2 (±30 kV ESD).
Technical Context
This TVS diode operates as a voltage-clamping protection device across signal or power lines, responding within picoseconds to transient overvoltages. Its bidirectional architecture enables symmetrical clamping for AC-coupled or floating circuits, and its low incremental surge resistance ensures minimal voltage overshoot during high-current surges up to 110 A (10/1000 μs).
Designed for industrial and automotive environments, the SMC5K28CA-M3/H maintains stable performance from –55 °C to +175 °C junction temperature, with thermal resistance RthJA = 90 °C/W and RthJM = 4.0 °C/W, enabling reliable operation under sustained surge stress and high ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 31.1 V / 34.4 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 45.4 V at 110 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 5000 W - Peak pulse power handling (10/1000 μs); supports robust protection against inductive switching and lightning-induced transients. |
| TJ max | +175 °C - Maximum junction temperature; enables use in under-hood automotive and high-temperature industrial enclosures. |
| ESD rating | ±30 kV (IEC 61000-4-2 contact/air) - Full-system ESD immunity without external shielding or filtering layers. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow), matte tin-plated terminals solderable per J-STD-002/JESD 22-B102. Bidirectional construction has no cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current toward cathode during positive overvoltage events; symmetric with cathode for bidirectional clamping. |
| Cathode | Transient current entry (negative half-cycle) | Conducts surge current toward anode during negative overvoltage events; identical physical terminal as anode due to bidirectional symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or floating rails without polarity constraints. |
| 40 kW surge rating (8/20 μs) | Supports high-energy lightning surge immunity (e.g., ISO 7637-2 Pulse 5a) without derating or parallel devices. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress-no additional qualification needed for Tier 1 designs. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, preserving timing margins in high-speed sensor interfaces. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and body control module inputs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to limit voltage seen by protected ICs to ≤45.4 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V microcontrollers and CAN/LIN transceivers during 12 V system surges. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Shunt protector on 4–20 mA loop output line, activated only during >28 V fault events to preserve signal integrity during normal operation. Use Value: Maintains sub-0.1% full-scale accuracy during steady-state while clamping 1 kV/μs transients to safe levels for op-amp input stages. |
| Telecom DC Power Input Protection | Consumer USB-C Port ESD Suppression |
Use Scenario: Guarding 48 V PoE-powered equipment inputs against induced surges from nearby AC mains or Ethernet cable coupling. IC Role / Device Role / Timing Role: First-line transient suppressor upstream of DC-DC converter input, sized to absorb 5000 W pulses without failure. Use Value: Eliminates need for multi-stage protection (e.g., GDT + TVS), reducing BOM count and PCB area in space-constrained telecom modules. | Use Scenario: Integrated ESD protection for USB-C CC and VBUS lines in portable audio/video accessories. IC Role / Device Role / Timing Role: Bidirectional shunt clamp on dual-role power/data lines, meeting IEC 61000-4-2 ±30 kV without degrading 10 Gbps signal integrity. Use Value: Achieves certified ESD robustness with one component instead of discrete RC networks or specialized ESD arrays, simplifying layout and validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA | Lower PPPM (600 W), same VWM/VBR range, SMB (DO-214AA) package with higher RthJA (110 °C/W) | Suitable for lower-energy transients; not recommended for automotive load dump or lightning-level surges | Select SMC5K28CA-M3/H when 5000 W surge headroom or AEC-Q101 qualification is required. |
| SMC5K28A-M3/H | Unidirectional version; same package, VWM, and PPPM but asymmetric clamping (cathode-anode only) | Requires correct polarity placement; unsuitable for AC or floating signal lines | Choose SMC5K28CA-M3/H for bidirectional protection where polarity is undefined or reversible. |
Compared with SMBJ28CA and SMC5K28A-M3/H, the SMC5K28CA-M3/H delivers 8.3× higher surge power handling and guaranteed automotive qualification, making it the sole option among the three for under-hood engine control units and industrial motor drives requiring sustained 110 A transient absorption.
Availability
SMC5K28CA-M3/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, and telecom DC input protection requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SMC5K28CA-M3/H 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, power efficiency, and automotive-grade qualification.
The SMC5KxxCA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments where AEC-Q101 reliability and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMC5K28CA-M3/H at its rated peak pulse current?
The SMC5K28CA-M3/H clamps to 45.4 V at its specified peak pulse current of 110 A under the standard 10/1000 μs waveform. This value is measured per Fig. 3 in the Vishay datasheet (Doc. #87024) and represents the maximum voltage imposed on protected circuitry during worst-case surge events.
Is the SMC5K28CA-M3/H suitable for automotive applications?
Yes, the SMC5K28CA-M3/H is AEC-Q101 qualified and rated for operation from –55 °C to +175 °C, making it suitable for under-hood and chassis-mounted automotive applications including body control modules, ADAS sensor interfaces, and infotainment power supplies.
Does the SMC5K28CA-M3/H have polarity markings on the package?
No, the SMC5K28CA-M3/H is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical construction allows installation in either orientation across protected lines without functional impact.
What is the thermal resistance of the SMC5K28CA-M3/H, and how does it affect PCB layout?
The SMC5K28CA-M3/H has RthJA = 90 °C/W and RthJM = 4.0 °C/W. To maintain safe junction temperatures during repeated surges, PCB copper pour under the SMC (DO-214AB) footprint must follow JEDEC 51-2A guidelines-minimum 1 in² (645 mm²) of 2 oz. copper connected via multiple thermal vias to inner ground planes.
How does the SMC5K28CA-M3/H compare to unidirectional TVS diodes with the same VWM?
The SMC5K28CA-M3/H provides symmetrical clamping for both polarities, unlike unidirectional variants such as SMC5K28A-M3/H. This eliminates polarity-dependent design errors and enables use in AC-coupled, differential, or floating signal paths where voltage reversals occur-critical for LIN, RS-485, and USB-C applications.
SMC5K28CA-M3/H 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/H FAQ
1.How can I place an order for SMC5K28CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K28CA-M3/H 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/H reliable?
The price and inventory of SMC5K28CA-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMC5K28CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K28CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K28CA-M3/H?
SMC5K28CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K28CA-M3/H 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/H?
For technical support, including SMC5K28CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K28CA-M3/H requirements.
6.How does Aetrix verify that SMC5K28CA-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K28CA-M3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMC5K28CA-M3/H?
All SMC5K28CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K28CA-M3/H, 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/H part is unused and in its original packaging.
Return procedure for SMC5K28CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K28CA-M3/H Tags
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