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Vishay General Semiconductor - Diodes Division SMC3K43CAHM3_A/I
- Part No.:
- SMC3K43CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K43CAHM3_A/I.pdf
- Description:
- 3KW, 43V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,243
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Product details
Overview
SMC3K43CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 69.4 V under 43.2 A peak pulse current, and features 47.8–52.8 V breakdown voltage with ≤1.0 μA leakage at 43 V stand-off voltage.
For engineers reviewing the SMC3K43CAHM3_A datasheet, SMC3K43CAHM3_A pinout, SMC3K43CAHM3_A application, or SMC3K43CAHM3_A equivalent, key selection criteria include its AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/3a/3b compliance, 30 kV ESD immunity per IEC 61000-4-2, and suitability for automotive power rail and sensor line protection where fast clamping (<1 ns response) and low incremental surge resistance are critical.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, activating when transient voltage exceeds its 47.8 V minimum breakdown threshold. Its bidirectional architecture enables symmetric suppression of both positive and negative transients without polarity sensitivity.
It sustains 175 °C maximum junction temperature and meets J-STD-020 MSL Level 1 (260 °C reflow peak), with thermal resistance RthJA = 90 °C/W and RthJM = 4.0 °C/W - enabling robust thermal performance in high-density automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 47.8 V min / 52.8 V max at 1.0 mA - defines precise activation threshold for overvoltage events |
| Stand-off Voltage (VWM) | 43 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA |
| Clamping Voltage (VC) | 69.4 V at 43.2 A (10/1000 μs) - limits downstream voltage stress during surge |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - supports high-energy load dump and ISO 16750-2 Pulse b events |
| ESD Withstand | 30 kV contact & air discharge (IEC 61000-4-2) - protects against human-body-model electrostatic events |
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock |
| Package | SMC (DO-214AB), halogen-free, RoHS-compliant, matte tin-plated terminals |
Pinout & Package
SMC3K43CAHM3_A uses the standard SMC (DO-214AB) surface-mount package: cathode-marked end (not applicable for bidirectional types), 7.11 mm × 6.22 mm body, 2.62 mm terminal width, and 3.20 mm height. Terminals are matte tin-plated for J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Surge current path | No polarity marking; either terminal conducts during positive or negative transients - simplifies layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management |
| 30 kW capability (8/20 μs) | Supports high-current lightning-induced surges per IEC 61000-4-5, exceeding ISO 7637-2 requirements |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 48 V automotive electronics |
| UL 497B recognition (E136766) | Validates safety compliance for telecom and industrial interface protection applications |
| MSL Level 1 rating | Permits standard SMT reflow without moisture sensitivity concerns - no baking required pre-assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 12 V/48 V battery-fed ECUs from load dump and alternator switching transients per ISO 16750-2 Pulse b. IC Role / Device Role / Timing Role: Shunt TVS placed directly across input rails to clamp surges before they reach DC/DC converters or microcontrollers. Use Value: Clamps to 69.4 V at 43.2 A, limiting stress on downstream 75 V-rated components while surviving ≥5 pulses at 101 V/400 ms per Fig. 9. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to CAN or LIN buses against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at 0 V) bidirectional clamp on differential or single-ended signal lines near connector entry points. Use Value: 30 kV IEC 61000-4-2 immunity ensures sensor integrity during assembly handling and field operation without signal distortion. |
| Telecom Line Interface | Consumer Power Adapter Input |
|
Use Scenario: Secondary-side surge protection on PoE-powered devices or DSL line cards exposed to induced lightning surges. IC Role / Device Role / Timing Role: High-power (3000 W) clamping device placed after isolation transformers to absorb residual common-mode energy. Use Value: 30 kW (8/20 μs) rating handles worst-case IEC 61000-4-5 surges without degradation, validated by UL 497B safety listing. |
Use Scenario: Input-stage transient suppression in wall adapters and USB-C PD chargers subjected to mains-borne surges and plug-in spikes. IC Role / Device Role / Timing Role: Primary-level TVS between bridge rectifier output and bulk capacitor to prevent overvoltage damage during AC line disturbances. Use Value: AEC-Q101 qualification ensures long-term reliability under thermal cycling and humidity exposure typical in consumer power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | Lower PPPM (400 W), SMA package (smaller footprint, higher RthJA = 150 °C/W) | Limited to lower-energy transients; unsuitable for ISO 16750-2 Pulse b or load dump | Select only for space-constrained non-automotive designs with <100 A surge exposure |
| SMCJ43CA | Same SMC package, identical VBR/VC, but rated for 1500 W (10/1000 μs) and not AEC-Q101 qualified | Lacks automotive qualification and fails ISO 7637-2 Pulse 1/2a/3a/3b validation | Acceptable for industrial/commercial use where AEC-Q101 and automotive standards are not mandated |
Compared with SMAJ43CA and SMCJ43CA, SMC3K43CAHM3_A uniquely combines 3000 W surge capacity, AEC-Q101 qualification, and full ISO 7637-2 compliance - making it the only option among the three suitable for front-end protection in automotive ECUs requiring sustained load dump resilience.
Availability
SMC3K43CAHM3_A is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, telecom line protection, and consumer power adapter designs requiring stable component supply, long-lifecycle support, and AEC-Q101 assurance.
Supply support for SMC3K43CAHM3_A 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, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for demanding automotive and industrial environments where robustness against ISO 7637-2, ISO 16750-2, and IEC 61000-4-2 transients is mandatory.
FAQ
What is the breakdown voltage range of SMC3K43CAHM3_A?
The SMC3K43CAHM3_A has a guaranteed breakdown voltage range of 47.8 V to 52.8 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight VBR window ensures consistent turn-on behavior across production lots and enables precise system-level overvoltage threshold design without margin over-engineering.
Is SMC3K43CAHM3_A suitable for automotive applications?
Yes, SMC3K43CAHM3_A is AEC-Q101 qualified and explicitly validated for automotive use, meeting ISO 7637-2 (Pulse 1, 2a, 3a, 3b) and ISO 16750-2 (Pulse b) transient immunity requirements. Its 175 °C max junction temperature and MSL Level 1 rating further confirm suitability for under-hood and infotainment ECU deployments.
What is the clamping voltage of SMC3K43CAHM3_A at its rated peak pulse current?
At its rated 43.2 A peak pulse current (10/1000 μs waveform), the SMC3K43CAHM3_A clamps to a maximum of 69.4 V. This value is specified in the Electrical Characteristics table and represents the upper limit of voltage seen by protected circuitry during a standardized surge event.
Does SMC3K43CAHM3_A have polarity markings?
No, SMC3K43CAHM3_A is a bidirectional TVS diode and carries no polarity marking on its SMC (DO-214AB) package. Both terminals function identically - conducting during positive or negative transients - eliminating orientation-dependent placement errors during automated assembly.
What packaging options are available for SMC3K43CAHM3_A?
SMC3K43CAHM3_A is supplied in 13-inch plastic tape and reel format (code "I") with a base quantity of 3500 units per reel. The "H" variant (7-inch reel, 850 units) is also available. Both meet JEDEC J-STD-020 moisture sensitivity Level 1 and require no pre-baking prior to SMT reflow.
SMC3K43CAHM3_A/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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 43.2A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC3K43CAHM3_A/I FAQ
1.How can I place an order for SMC3K43CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K43CAHM3_A/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 SMC3K43CAHM3_A/I reliable?
The price and inventory of SMC3K43CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K43CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K43CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K43CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K43CAHM3_A/I?
SMC3K43CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K43CAHM3_A/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 SMC3K43CAHM3_A/I?
For technical support, including SMC3K43CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K43CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K43CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K43CAHM3_A/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 SMC3K43CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K43CAHM3_A/I?
All SMC3K43CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K43CAHM3_A/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 SMC3K43CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K43CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K43CAHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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