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Vishay General Semiconductor - Diodes Division SMC3K64CAHM3_A/I
- Part No.:
- SMC3K64CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K64CAHM3_A/I.pdf
- Description:
- 3KW, 64V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,014
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Product details
Overview
SMC3K64CAHM3_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 with 3000 W peak pulse power (10/1000 μs), 103 V clamping voltage at 29.1 A, and 64 V stand-off voltage. It protects MOSFETs, ICs, and sensor signal lines in automotive power systems against ISO 7637-2 and ISO 16750-2 transients.
For engineers reviewing the SMC3K64CAHM3_A datasheet, SMC3K64CAHM3_A pinout, SMC3K64CAHM3_A application, or SMC3K64CAHM3_A equivalent, key selection criteria include clamping performance under 8/20 μs lightning surges (134 V @ 224 A), AEC-Q101 qualification, UL 497B safety recognition, and MSL Level 1 moisture sensitivity.
Technical Context
This TVS diode operates bidirectionally with breakdown voltage range 71.1–78.6 V at 1 mA test current, enabling symmetric overvoltage clamping on AC or differential signal paths. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients like ISO 7637-2 Pulse 3b (150 ns).
Thermal design is supported by RthJM = 4.0 °C/W and RthJA = 90 °C/W (JEDEC 51-2A, FR4), allowing reliable operation up to TJ = 175 °C. The device meets IEC 61000-4-2 ESD immunity to ±30 kV (contact/air discharge), confirming robustness in harsh automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 64 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below system rail. |
| Breakdown Voltage (VBR) | 71.1–78.6 V at 1 mA - Confirmed avalanche initiation threshold; ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VC) | 103 V at 29.1 A (10/1000 μs) - Peak voltage seen by protected circuit during 3 kW surge; critical for downstream component survivability. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - Energy-handling capability for load-dump and switching transients; validated per IEC 61000-4-5. |
| ESD Rating | ±30 kV HBM - Withstands electrostatic discharge without degradation; eliminates need for external ESD protection on sensitive nodes. |
| AEC-Q101 Qualified | Qualified for automotive applications - Validated reliability under temperature cycling, humidity, and mechanical stress per AEC standard. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated assembly. |
Pinout & Package
SMC (DO-214AB) package: molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability; bidirectional polarity - no marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Anode-side terminal (non-marked end) | For bidirectional devices, both terminals are functionally identical; no polarity-sensitive mounting required. |
| Anode (A) | Cathode-side terminal (non-marked end) | Terminal symmetry enables flexible PCB layout; no orientation constraints during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns. |
| 30 kW surge rating (8/20 μs) | Supports lightning-induced surge immunity per IEC 61000-4-5; clamps to 134 V at 224 A. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage stress on protected components; improves system-level transient margin. |
| Halogen-free, RoHS-compliant | Meets environmental compliance requirements for automotive and industrial end equipment. |
| MSL Level 1 (260 °C peak) | Allows standard reflow soldering without pre-baking; simplifies manufacturing flow. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2 Pulse b) and inductive switching spikes. IC Role / Device Role / Timing Role: Primary clamping element placed across power input rails upstream of DC/DC converters and microcontrollers. Use Value: Limits transient voltage to ≤103 V during 3 kW surges, preventing latch-up or gate oxide damage in downstream silicon. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) shunt protector on 4–20 mA or 0–10 V output lines. Use Value: Maintains signal integrity while absorbing ±30 kV HBM discharges without affecting sensor accuracy or response time. |
| Telecom Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding RS-485 transceivers connected to long outdoor cables exposed to induced lightning surges. IC Role / Device Role / Timing Role: First-line defense on bus lines, coordinated with series impedance to meet IEC 61000-4-5 Level 4. Use Value: Clamps 8/20 μs surges to 134 V at 224 A, ensuring transceiver survival without derating or thermal shutdown. |
Use Scenario: Input-stage surge suppression in wall-mounted AC/DC adapters subjected to mains-borne transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor input, rated for repetitive 3000 W pulses. Use Value: Extends adapter lifetime by preventing capacitor overvoltage and rectifier failure during line surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CA | Same VWM (64 V) but lower PPPM = 400 W; SMA package (smaller footprint, lower thermal mass). | Limited to lower-energy transients; unsuitable for ISO 16750-2 load dump or 3000 W surges. | Select when space-constrained and surge energy is <500 W; verify thermal derating at elevated ambient. |
| SMCJ64CA | Identical SMC package and 3000 W rating, but non-AEC-Q101 qualified; VBR min/max tighter (71.1–75.4 V vs. 71.1–78.6 V). | Approved for industrial/commercial use only; lacks automotive qualification documentation and stress testing. | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated. |
Compared with SMAJ64CA and SMCJ64CA, SMC3K64CAHM3_A uniquely combines AEC-Q101 qualification, 3000 W surge capability, and halogen-free construction - making it the only option qualified for front-end protection in automotive ECUs requiring full ISO 7637-2 compliance.
Availability
SMC3K64CAHM3_A is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor interfaces, telecom infrastructure, and consumer power adapters requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K64CAHM3_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, and passive components for demanding industrial and automotive applications.
The SMC3KxxCAHM3_A series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in 12 V and 24 V automotive electrical systems compliant with ISO standards.
FAQ
What is the maximum clamping voltage of SMC3K64CAHM3_A under a 10/1000 μs surge?
The SMC3K64CAHM3_A clamps to a maximum of 103 V at 29.1 A under a 10/1000 μs waveform. This value is measured and guaranteed per the Vishay datasheet (Document Number 98241, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during standardized surge events. Engineers must compare this clamping voltage against the absolute maximum ratings of downstream components to ensure survivability.
Is SMC3K64CAHM3_A qualified for automotive applications?
Yes, SMC3K64CAHM3_A is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing (uHAST). This qualification confirms its suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is mandatory - a requirement explicitly verified for SMC3K64CAHM3_A in the official Vishay documentation.
What does the "HM3_A" suffix indicate in SMC3K64CAHM3_A?
The "HM3_A" suffix in SMC3K64CAHM3_A denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that pass JESD 201 Class 2 whisker testing. It also signifies compliance with MSL Level 1 (peak reflow temperature 260 °C) and UL 497B safety recognition (File E136766). These attributes are confirmed in the Vishay datasheet and distinguish HM3_A from legacy variants lacking automotive-grade process controls.
How does SMC3K64CAHM3_A perform under IEC 61000-4-2 ESD stress?
SMC3K64CAHM3_A withstands ±30 kV contact discharge and ±30 kV air discharge per IEC 61000-4-2, as verified in the Vishay datasheet. This performance exceeds typical system-level ESD immunity requirements and allows the device to serve as both primary and secondary ESD protection on signal and power lines without additional components. Its fast response time ensures clamping occurs before sensitive ICs experience damaging voltage levels.
What is the thermal resistance from junction to mount (RthJM) for SMC3K64CAHM3_A?
The junction-to-mount thermal resistance (RthJM) for SMC3K64CAHM3_A is 4.0 °C/W, measured using the Transient Dual Interface Method (TDIM) per JEDEC 51-14. This low value enables efficient heat transfer to the PCB copper pad or heatsink, supporting sustained operation at high ambient temperatures - a critical parameter for automotive under-hood applications where junction temperature must remain below 175 °C.
SMC3K64CAHM3_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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 29.1A
- 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)
SMC3K64CAHM3_A/I FAQ
1.How can I place an order for SMC3K64CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K64CAHM3_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 SMC3K64CAHM3_A/I reliable?
The price and inventory of SMC3K64CAHM3_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 SMC3K64CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K64CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K64CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K64CAHM3_A/I?
SMC3K64CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K64CAHM3_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 SMC3K64CAHM3_A/I?
For technical support, including SMC3K64CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K64CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K64CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K64CAHM3_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 SMC3K64CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K64CAHM3_A/I?
All SMC3K64CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K64CAHM3_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 SMC3K64CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K64CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K64CAHM3_A/I Tags
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