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Vishay General Semiconductor - Diodes Division SMC5K40A-M3/I
- Part No.:
- SMC5K40A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K40A-M3/I.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,869
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Product details
Overview
SMC5K40A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 64.5 V clamping voltage (VC) at 77.5 A peak pulse current (IPPM), and 5000 W peak pulse power (10/1000 μs). It is used to protect MOSFETs, ICs, and sensor signal lines in industrial power supplies and automotive ECUs against inductive switching transients.
For engineers reviewing the SMC5K40A-M3/I datasheet, SMC5K40A-M3/I pinout, SMC5K40A-M3/I application, or SMC5K40A-M3/I equivalent, this page delivers verified electrical parameters, JEDEC-compliant thermal resistance (RthJA = 90 °C/W), AEC-Q101 qualification status, UL 497B safety recognition, and real-world clamping performance under 8/20 μs and 10/1000 μs surge waveforms.
Technical Context
This TVS diode operates as a unidirectional clamping device with fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of transient overvoltages before downstream components are damaged. Its junction-to-ambient thermal resistance of 90 °C/W and junction-to-mount resistance of 4.0 °C/W support reliable operation up to +150 °C junction temperature under pulsed conditions.
The device meets IEC 61000-4-2 ESD immunity (±30 kV contact/air), complies with J-STD-020 MSL Level 1 (260 °C reflow peak), and uses matte tin-plated leads qualified per JESD 22-B102 and JESD 201 Class 2 whisker test. The SMC (DO-214AB) package provides robust mechanical mounting and UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Confirmed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 64.5 V at 77.5 A (10/1000 μs) - Clamping voltage limits stress on downstream components during 5000 W surges. |
| PPPM | 5000 W (10/1000 μs) - Peak pulse power rating determines survivability against standard lightning-induced surges. |
| TJ max. | +150 °C - Maximum junction temperature enables use in under-hood automotive and high-ambient industrial environments. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact/air) - Robust electrostatic discharge immunity simplifies system-level ESD design margining. |
| RthJA | 90 °C/W - Thermal resistance value informs PCB copper area requirements for sustained surge duty cycles. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to ground or low-side reference in unidirectional configuration. | Provides return path for surge current when device clamps; must be routed with low-inductance trace to minimize overshoot. |
| Cathode | Current exit terminal during clamping; connected to protected line (e.g., power rail or signal line). | Acts as the "protected node" interface; placement adjacent to IC input pins minimizes clamping loop inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Enables integration into DC-biased circuits without reverse leakage concerns; avoids false triggering on normal negative excursions. |
| 5000 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV line-earth) surge compliance in industrial power inputs without external series impedance. |
| AEC-Q101 qualified variant available (HM3 suffix) | Validated for automotive under-hood applications; SMC5K40A-M3/I itself is industrial-grade but shares identical die and package construction. |
| UL 497B recognized (E136766) | Meets safety agency requirements for telecom and industrial equipment; eliminates need for additional isolation or certification effort. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on protected ICs-critical for 3.3 V or 5 V logic interfaces where margin is tight. |
Applications
| Automotive Power Distribution | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules from load-dump and alternator ripple transients. IC Role / Device Role: Primary clamping element on main power rail upstream of DC-DC converters and microcontrollers. Use Value: Withstands 5000 W surges while limiting rail voltage to ≤64.5 V, preventing latch-up or permanent damage to 65 V-rated regulators. |
Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges. IC Role / Device Role: Standoff-clamp TVS placed directly at connector entry point before optocoupler or Schmitt trigger input stage. Use Value: 40 V VWM matches common 24 V DC industrial logic levels; 64.5 V VC ensures compatibility with 75 V input stage ratings. |
| Telecom Line Interface | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to long outdoor cable runs. IC Role / Device Role: First-line transient suppressor on differential pair or power line entering communication module. Use Value: ±30 kV ESD rating and 8/20 μs clamping (84.0 V @ 476 A) meet GR-1089-CORE and ITU-T K.21 requirements. |
Use Scenario: Protecting high-side and low-side gate drivers in BLDC motor inverters from Miller-induced voltage spikes. IC Role / Device Role: Unidirectional clamp across gate-source terminals or supply rails of Si MOSFET drivers. Use Value: Fast response (<1 ns) and low Rsurge prevent gate oxide rupture during dV/dt events exceeding 50 V/ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-M3/52 | Lower PPPM (600 W), SMB (DO-214AA) package, same VWM/VBR range, lower IPPM (32.4 A). | Targeted at space-constrained consumer electronics; insufficient for industrial 4 kV surge testing. | Select SMBJ40A-M3/52 only for cost-sensitive, low-energy applications where board area is critical and surge threat level is <1 kV. |
| SMC5K43A-M3/I | Higher VWM (43 V), VBR (47.8–52.8 V), VC (69.4 V @ 72.0 A); otherwise identical package, thermal, and reliability specs. | Better suited for 48 V nominal systems (e.g., telecom power shelves) requiring higher standoff margin before clamping. | Choose SMC5K43A-M3/I when protecting 48 V rails where 40 V VWM would cause excessive leakage or premature conduction. |
Compared with SMBJ40A-M3/52, SMC5K40A-M3/I delivers 8.3× higher surge energy handling and superior thermal dissipation due to larger SMC package; versus SMC5K43A-M3/I, it offers tighter clamping headroom for 36–42 V systems while maintaining identical footprint and assembly process.
Availability
SMC5K40A-M3/I is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line cards, and motor drive gate driver protection requiring stable component supply and full traceability.
Supply support for SMC5K40A-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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The SMC5KxxA family was engineered for high-energy transient suppression in harsh environments-designed to replace older P6KE and 1.5KE series with improved power density, tighter tolerances, and extended AEC-Q101 qualification coverage.
FAQ
What is the maximum clamping voltage of the SMC5K40A-M3/I under a 10/1000 μs surge?
The SMC5K40A-M3/I has a maximum clamping voltage (VC) of 64.5 V at 77.5 A peak pulse current under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024, Document Number 87742. The clamping performance ensures protected ICs experience minimal overvoltage stress during surge events.
Is the SMC5K40A-M3/I AEC-Q101 qualified?
No, the SMC5K40A-M3/I is an industrial-grade part. AEC-Q101 qualification applies only to variants with the HM3 suffix (e.g., SMC5K40AHM3_A/I), which are offered for SMC5K10A–SMC5K20A types only. The SMC5K40A-M3/I shares the same die and SMC package but is not subjected to the full automotive stress test suite required by AEC-Q101.
What does the "M3" suffix indicate in SMC5K40A-M3/I?
The "M3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads qualified per JESD 22-B102 solderability and JESD 201 Class 2 whisker resistance. The "I" indicates packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units-standard for automated SMT assembly.
Can the SMC5K40A-M3/I be used in bidirectional configurations?
No, the SMC5K40A-M3/I is strictly unidirectional. Its internal structure supports clamping only in reverse bias; forward conduction occurs at ~0.7 V like a standard silicon diode. For bidirectional protection, two SMC5K40A-M3/I devices must be connected in series opposing configuration-or a dedicated bidirectional TVS such as SMBJ40CA-M3/52 should be selected.
What is the thermal resistance junction-to-ambient (RthJA) for SMC5K40A-M3/I?
The SMC5K40A-M3/I has a typical junction-to-ambient thermal resistance (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 critical for calculating allowable average power dissipation in repetitive surge scenarios.
SMC5K40A-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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 77.5A
- 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)
SMC5K40A-M3/I FAQ
1.How can I place an order for SMC5K40A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K40A-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 SMC5K40A-M3/I reliable?
The price and inventory of SMC5K40A-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 SMC5K40A-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K40A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K40A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K40A-M3/I?
SMC5K40A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K40A-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 SMC5K40A-M3/I?
For technical support, including SMC5K40A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K40A-M3/I requirements.
6.How does Aetrix verify that SMC5K40A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K40A-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 SMC5K40A-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K40A-M3/I?
All SMC5K40A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K40A-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 SMC5K40A-M3/I part is unused and in its original packaging.
Return procedure for SMC5K40A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K40A-M3/I Tags
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DESD3V3E1BL-7B
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