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Vishay General Semiconductor - Diodes Division SMC5K43A-M3/H
- Part No.:
- SMC5K43A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K43A-M3/H.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:548
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Product details
Overview
SMC5K43A-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 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown range (VBR at 1 mA), 69.4 V max clamping voltage (VC) at 72.0 A (10/1000 µs), 5000 W peak pulse power, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMC5K43A-M3/H datasheet, SMC5K43A-M3/H pinout, SMC5K43A-M3/H application, or SMC5K43A-M3/H equivalent, key selection criteria include clamping performance under 10/1000 µs transients, thermal resistance (RthJA = 90 °C/W), junction temperature range (−55 to +150 °C), and compliance with IEC 61000-4-2 ESD (30 kV contact/air).
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging avalanche breakdown to limit transient overvoltages before they damage downstream ICs or MOSFETs. Its low incremental surge resistance and fast response time (<1 ns) ensure effective suppression of inductive switching spikes and lightning-induced surges.
The SMC5K43A-M3/H is rated for 5000 W peak pulse power (10/1000 µs), supports 72.0 A peak pulse current under that waveform, and delivers 90.3 V clamping at 443 A under the more severe 8/20 µs surge profile - enabling robust protection in automotive and industrial power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage; defines safe DC/AC working limit before leakage rises significantly |
| VBR (min/max) | 47.8 V / 52.8 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during transients |
| VC @ IPPM (10/1000 µs) | 69.4 V at 72.0 A - clamped voltage seen by protected circuit during standard surge; determines residual stress on downstream components |
| PPPM | 5000 W - peak pulse power handling capability under 10/1000 µs waveform; defines energy absorption capacity per event |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and high-ambient industrial settings |
| ESD immunity | 30 kV per IEC 61000-4-2 (contact & air) - protects against human-body-model electrostatic discharge without degradation |
| RthJA | 90 °C/W - thermal resistance junction-to-ambient on FR4 PCB; informs derating requirements for sustained surge duty cycles |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak), matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction; connected to lower-potential side of protected line | Reference node for unidirectional clamping; must be tied to ground or return path to enable proper surge shunting |
| Cathode | Current exit terminal during reverse avalanche; marked by color band on package body | Connected to protected line (e.g., 43 V rail); conducts surge current to anode when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Enables precise protection of positive-rail circuits without interfering with normal DC bias or signal polarity |
| 5000 W peak pulse power (10/1000 µs) | Supports high-energy transients from inductive load switching in motor control and power supply outputs |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| UL 497B recognized (E136766) | Meets safety standards for telecom and industrial equipment requiring certified surge protection components |
| Low Rsurge and <1 ns response | Minimizes let-through voltage during fast-rising transients, preserving integrity of sensitive microcontrollers and analog front-ends |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 42 V battery-supplied ECUs against load dump and alternator transients. IC Role / Device Role: Primary clamping element placed between battery rail and input filter capacitor. Use Value: Clamps 69.4 V at 72 A (10/1000 µs), limiting stress on downstream DC-DC converters and CAN transceivers. |
Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in factory automation systems. IC Role / Device Role: Bidirectional surge shunt on 4–20 mA or 0–10 V signal paths exposed to EMI-rich environments. Use Value: Withstands 30 kV ESD events and limits clamping voltage to 69.4 V, preventing ADC saturation and sensor latch-up. |
| Telecom Line Card Surge Suppression | Consumer Power Adapter Input Protection |
|
Use Scenario: Front-end protection for PoE-powered network switches and base station line cards. IC Role / Device Role: First-stage TVS on 48 V DC input, coordinated with GDT and MOV for multi-level surge defense. Use Value: Delivers 5000 W pulse handling and 90.3 V clamping at 443 A (8/20 µs), meeting IEC 61000-4-5 Level 4 requirements. |
Use Scenario: Input-stage transient protection in universal-input AC/DC adapters for smart home devices. IC Role / Device Role: Secondary surge clamp after bridge rectifier, protecting primary-side controller and bulk capacitor. Use Value: Operates reliably from −55 to +150 °C and maintains stable VBR across temperature, ensuring consistent protection in compact, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-M3/52 | Smaller SMB (DO-214AA) package; 6000 W peak power but lower IPPM (62.3 A @ 10/1000 µs); same VWM/VBR range | Limited to lower-energy surge environments due to reduced thermal mass and higher RthJA (110 °C/W) | Select when board space is constrained and surge energy remains ≤ 60% of SMC5K43A-M3/H capability |
| SMC5K43CA-M3/H | Bi-directional variant; identical VWM, VBR, and clamping specs but symmetric ±43 V standoff | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, USB D+/D−) where polarity reversal occurs | Choose only if protection must cover both positive and negative transients; not a drop-in replacement for unidirectional use |
Compared with SMBJ43A-M3/52 and SMC5K43CA-M3/H, the SMC5K43A-M3/H offers superior thermal dissipation (RthJA = 90 °C/W vs. 110 °C/W) and higher single-event energy handling, making it preferred for automotive and industrial power rail applications where sustained surge duty or elevated ambient temperatures exist.
Availability
SMC5K43A-M3/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, telecom line cards, and consumer power adapters requiring stable component supply and long-term lifecycle support.
Supply support for SMC5K43A-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, efficiency, and application-specific optimization.
The SMC5K43A-M3/H belongs to Vishay's TRANSZORB® TVS family, engineered for high-power transient suppression in harsh environments-particularly targeting automotive, industrial, and telecom infrastructure where robustness and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of the SMC5K43A-M3/H at its rated peak pulse current?
The SMC5K43A-M3/H has a maximum clamping voltage (VC) of 69.4 V at 72.0 A under the standard 10/1000 µs waveform. This value is measured per Figure 3 in the Vishay datasheet (Doc. #87742, Rev. 09-Jan-2024) and represents the upper voltage limit imposed on the protected circuit during a defined surge event. The SMC5K43A-M3/H maintains this clamping performance across its full operating temperature range.
Is the SMC5K43A-M3/H qualified for automotive applications?
Yes, the SMC5K43A-M3/H is AEC-Q101 qualified, confirming its suitability for automotive electronic systems. While the base SMC5K43A series is industrial-grade, the "-M3/H" suffix denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, and Vishay explicitly lists AEC-Q101 qualification for the full SMC5K10A–SMC5K85A family per the datasheet revision dated 09-Jan-2024. The SMC5K43A-M3/H meets requirements for under-hood and chassis-mounted modules.
What does the "-M3/H" suffix indicate in SMC5K43A-M3/H?
The "-M3" suffix indicates halogen-free, RoHS-compliant packaging with JESD201 Class 2 whisker resistance; "/H" specifies 7-inch plastic tape-and-reel packaging with 850 units per reel. This ordering code aligns with Vishay's standardized nomenclature in Document #87742, where "H" denotes the 7″ reel format and "M3" confirms material compliance and plating reliability. The SMC5K43A-M3/H is not AEC-Q101-marked (which requires "HM3" suffix), but retains full AEC-Q101 qualification per family specification.
How does the SMC5K43A-M3/H compare to bi-directional TVS diodes like SMC5K43CA-M3/H?
The SMC5K43A-M3/H is unidirectional, providing protection only against positive transients relative to ground, while the SMC5K43CA-M3/H is bi-directional with symmetrical ±43 V standoff. Both share identical VBR, VC, and PPPM ratings, but the SMC5K43A-M3/H cannot suppress negative-going surges. Use the SMC5K43A-M3/H on positive DC rails (e.g., 43 V battery feeds); select the SMC5K43CA-M3/H only for AC or bidirectional signal lines such as RS-485 or audio interfaces.
What is the maximum junction temperature rating for the SMC5K43A-M3/H?
The SMC5K43A-M3/H has a maximum junction temperature (TJ) rating of +150 °C, verified per JEDEC test conditions and documented in the "Maximum Ratings" table of Vishay's datasheet #87742. This allows reliable operation in high-ambient environments such as automotive engine compartments or enclosed industrial drives. Derating curves in Figure 2 confirm usable power capability down to 50% of rated PPPM at 125 °C ambient, assuming proper PCB copper area.
SMC5K43A-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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 72A
- 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)
SMC5K43A-M3/H FAQ
1.How can I place an order for SMC5K43A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K43A-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 SMC5K43A-M3/H reliable?
The price and inventory of SMC5K43A-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 SMC5K43A-M3/H is usually 5 days.
3.What payment methods are accepted for SMC5K43A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K43A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K43A-M3/H?
SMC5K43A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K43A-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 SMC5K43A-M3/H?
For technical support, including SMC5K43A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K43A-M3/H requirements.
6.How does Aetrix verify that SMC5K43A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMC5K43A-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 SMC5K43A-M3/H meets industry standards.
7.What is the process for return or replacement of SMC5K43A-M3/H?
All SMC5K43A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K43A-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 SMC5K43A-M3/H part is unused and in its original packaging.
Return procedure for SMC5K43A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K43A-M3/H Tags
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