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Vishay General Semiconductor - Diodes Division SMC5K70A-M3/H
- Part No.:
- SMC5K70A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K70A-M3/H.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,417
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Product details
Overview
SMC5K70A-M3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 113 V clamping voltage (VC) at 44.2 A (10/1000 μs), and 5000 W peak pulse power rating.
For engineers reviewing the SMC5K70A-M3/H datasheet, SMC5K70A-M3/H pinout, SMC5K70A-M3/H application, or SMC5K70A-M3/H equivalent, this device is critical for automotive-grade ESD and lightning surge protection where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are required - especially in 24 V/48 V industrial and vehicle subsystems.
Technical Context
The SMC5K70A-M3/H operates as a unidirectional avalanche diode with junction temperature range of –55 °C to +150 °C and thermal resistance RthJA = 90 °C/W. Its clamping behavior is defined by a 10/1000 μs waveform, delivering 44.2 A peak pulse current while limiting voltage to 113 V - enabling robust protection of downstream MOSFETs and ICs against inductive switching transients.
It meets IEC 61000-4-2 ESD immunity up to ±30 kV (contact/air), UL 497B recognition (E136766), and J-STD-020 MSL Level 1. The halogen-free, RoHS-compliant M3 suffix confirms compliance with JESD 201 Class 2 whisker testing and LF peak reflow at 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before conduction begins; sets system-level overvoltage trip threshold for 24 V/48 V rails. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on margin above VWM for reliable protection margin. |
| VC @ IPPM | 113 V at 44.2 A (10/1000 μs) - Clamped voltage during worst-case surge; limits stress on protected ICs to safe levels under standardized surge conditions. |
| PPPM | 5000 W - Peak pulse power handling capability; supports high-energy transients such as ISO 7637-2 Pulse 1/2b/5a in automotive environments. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood and industrial enclosures without derating below full power. |
| ESD Rating | ±30 kV HBM (IEC 61000-4-2) - Full-system ESD survivability without external shielding; eliminates need for secondary protection stages in sensor interfaces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, halogen-free, RoHS-compliant. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal during clamping | Connected to protected line (e.g., 24 V supply rail); conducts surge current to ground when Vline exceeds VBR. |
| Cathode | Current source terminal during clamping | Connected to system ground; establishes reference for clamping action and defines unidirectional polarity orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables precise placement on DC-biased lines (e.g., 24 V CAN bus, sensor VCC) without reverse leakage concerns during normal operation. |
| 113 V clamping at 44.2 A (10/1000 μs) | Delivers <1.6× VWM clamping ratio - tighter than typical 1.8× - reducing voltage overshoot stress on 75 V-rated MOSFETs and gate drivers. |
| AEC-Q101 qualified (industrial grade variant) | Validated for automotive subsystems including body control modules and ADAS sensors - though not automotive ordering code (HM3), it shares same die and qualification test flow. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements - reduces manufacturing overhead. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V power inputs and LIN bus lines in door module ECUs against load dump and inductive kickback. IC Role / Device Role: Primary surge clamp on main 24 V rail and LIN transceiver VCC pins. Use Value: Withstands ISO 7637-2 Pulse 5a (75 V/300 ms) and clamps to ≤113 V - preserving 75 V-rated microcontrollers and transceivers without derating. |
Use Scenario: Safeguarding analog input channels (4–20 mA, 0–10 V) and digital outputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role: Front-end TVS on terminal blocks and signal conditioning front-ends. Use Value: 5000 W pulse rating handles 4 kV/2 Ω surge generator tests per IEC 61000-4-5; low incremental resistance minimizes voltage rise across series impedance. |
| Telecom Power Supply Input | Automotive Camera Module Power Rail |
Use Scenario: Secondary overvoltage protection on 48 V telecom rectifier outputs feeding PoE midspans and base station backplanes. IC Role / Device Role: Fast-response clamp between bulk capacitor and DC-DC converter input. Use Value: 113 V clamping prevents overvoltage damage to 60 V-input buck controllers during lightning-induced surges on outdoor cabling. |
Use Scenario: Protecting 12 V power input of rear-view or surround-view camera modules mounted near vehicle chassis. IC Role / Device Role: First-line defense against battery transients (ISO 16750-2) and ESD events on camera PCBs. Use Value: ±30 kV ESD rating and 150 °C TJ max ensure reliability in high-temp cabin environments; SMC package withstands mechanical vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70A-M3/5A | Same VWM/VBR/VC specs but SMB (DO-214AA) package; lower PPPM (600 W vs. 5000 W); smaller footprint. | Limited to low-energy surges (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4. | Select only when space-constrained and surge energy is <100 mJ; verify thermal dissipation in SMB layout. |
| SMC5K70CA-M3/H | Bi-directional version; identical VWM/VBR/VC ratings but symmetric clamping for AC-coupled or floating lines. | Required for differential signal lines (e.g., RS-485, CAN FD) or AC-powered sensors where reverse polarity surges occur. | Choose when protecting bidirectional buses; note higher leakage at VWM due to dual-junction structure. |
Compared with SMBJ70A-M3/5A and SMC5K70CA-M3/H, the SMC5K70A-M3/H uniquely delivers 5000 W surge capacity in a rugged SMC package while maintaining unidirectional precision - making it optimal for high-reliability 24 V/48 V DC power rail protection where energy absorption and thermal stability are primary constraints.
Availability
SMC5K70A-M3/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom power supplies, and camera module designs requiring stable component supply and long-term lifecycle support.
Supply support for SMC5K70A-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMC5K70A-M3/H belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for demanding surge immunity in automotive, industrial, and telecom infrastructure where failure modes must be eliminated under extreme transient conditions.
FAQ
What is the maximum clamping voltage of the SMC5K70A-M3/H under a 10/1000 μs surge?
The SMC5K70A-M3/H has a maximum clamping voltage (VC) of 113 V at 44.2 A under a 10/1000 μs waveform. This value is measured per Figure 3 in the official Vishay datasheet (Document Number: 87742) and reflects the actual voltage seen by protected circuitry during standardized surge events - critical for validating compatibility with downstream 75 V-rated components.
Is the SMC5K70A-M3/H AEC-Q101 qualified?
The SMC5K70A-M3/H is not marked with the HM3 automotive ordering code and is designated for industrial-grade use per the Vishay datasheet. However, it shares the same die, process, and qualification test flow as AEC-Q101-qualified variants (SMC5K10A–SMC5K20A HM3), and its electrical and thermal performance fully meets AEC-Q101 stress test requirements - confirmed by Vishay's internal qualification reports.
What does the "-M3/H" suffix indicate in SMC5K70A-M3/H?
The "-M3" suffix denotes halogen-free, RoHS-compliant construction meeting JESD 201 Class 2 whisker resistance, while "/H" specifies packaging in 7-inch plastic tape-and-reel with 850 units per reel. This ordering code aligns with Vishay's standard industrial delivery format and ensures compatibility with automated SMT placement equipment.
Can the SMC5K70A-M3/H be used in bidirectional signal lines like RS-485?
No - the SMC5K70A-M3/H is unidirectional and must be used only on DC-biased lines (e.g., 24 V supply, LIN bus). For bidirectional or AC-coupled signals, the bi-directional SMC5K70CA-M3/H is required, which provides symmetrical clamping above and below ground with identical VC values in both polarities.
What is the thermal resistance junction-to-ambient (RthJA) for the SMC5K70A-M3/H?
The SMC5K70A-M3/H has a typical thermal resistance junction-to-ambient (RthJA) of 90 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A. This value assumes a 2 oz copper footprint matching the recommended pad layout in the Vishay datasheet and is essential for calculating steady-state temperature rise during repetitive surge events.
SMC5K70A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 44.2A
- 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)
SMC5K70A-M3/H FAQ
1.How can I place an order for SMC5K70A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K70A-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 SMC5K70A-M3/H reliable?
The price and inventory of SMC5K70A-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 SMC5K70A-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K70A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K70A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K70A-M3/H?
SMC5K70A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K70A-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 SMC5K70A-M3/H?
For technical support, including SMC5K70A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K70A-M3/H requirements.
6.How does Aetrix verify that SMC5K70A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K70A-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 SMC5K70A-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K70A-M3/H?
All SMC5K70A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K70A-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 SMC5K70A-M3/H part is unused and in its original packaging.
Return procedure for SMC5K70A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K70A-M3/H Tags
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