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Vishay General Semiconductor - Diodes Division SMC3K64CAHM3/9A
- Part No.:
- SMC3K64CAHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K64CAHM3/9A.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,316
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Product details
Overview
SMC3K64CAHM3/9A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 64 V stand-off voltage (VWM), and 103 V maximum clamping voltage (VC) at 29.1 A peak pulse current. It is AEC-Q101 qualified and designed for automotive-grade overvoltage protection of signal lines and power rails in sensor units and control modules.
For engineers reviewing the SMC3K64CAHM3/9A datasheet, SMC3K64CAHM3/9A pinout, SMC3K64CAHM3/9A application, or SMC3K64CAHM3/9A equivalent, key selection criteria include clamping performance under 10/1000 μs surge, bidirectional polarity compatibility with floating or AC-coupled interfaces, AEC-Q101 qualification status, and SMC package thermal and mechanical robustness for high-reliability PCB layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its breakdown threshold (71.1–78.6 V). Its low incremental surge resistance ensures stable clamping during high-current events, while its bidirectional structure supports symmetric protection on ungrounded or differential signal paths without polarity constraints.
The device is optimized for automotive and industrial environments: it meets J-STD-020 MSL Level 1, withstands 260 °C reflow peak temperature, and passes JESD 201 Class 2 whisker testing. Its 150 °C maximum junction temperature and halogen-free, RoHS-compliant HM3 suffix confirm suitability for under-hood and long-lifecycle embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 48 V or 60 V nominal systems. |
| VBR min/max | 71.1 V / 78.6 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 103 V - Clamping voltage measured at 29.1 A peak pulse current (10/1000 μs); determines protected circuit's maximum transient exposure. |
| PPPM | 3000 W - Peak pulse power handling capability; enables robust suppression of ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| Polarity | Bidirectional - Provides symmetrical clamping for AC signals, floating buses, or bidirectional data lines without external polarity routing. |
| TJ max | 150 °C - Maximum junction temperature rating; supports operation in engine bay or industrial enclosures with minimal derating. |
| Qualification | AEC-Q101 - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT; not for new designs per Vishay notice. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); thermal pad area 8.0 mm × 8.0 mm recommended for PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Transient current sink node | Connected to protected line; conducts surge current to ground when voltage exceeds VBR; bidirectional symmetry means either terminal may serve as cathode depending on polarity of transient. |
| Anode (unmarked side) | Transient current sink node | Electrically identical to cathode in bidirectional configuration; no polarity marking required; both terminals function identically under positive or negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse power (10/1000 μs) | Enables single-device protection against severe automotive load-dump and inductive switching transients without cascading devices. |
| AEC-Q101 qualification | Confirms reliability for automotive ECUs, ADAS sensors, and body control modules where field failure risk must be minimized. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing for high-volume automotive assembly. |
| Halogen-free, RoHS-compliant HM3 suffix | Meets global environmental compliance mandates and supports lead-free soldering with J-STD-002/JESD 22-B102 process compatibility. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or lightning-induced surges), improving protection margin for downstream ICs. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at sensor connector or ASIC input pins to clamp surges before they reach precision front-end circuitry. Use Value: Limits transient voltage to ≤103 V during 29.1 A pulses, preserving sensor accuracy and preventing latch-up in 12-bit ADCs or op-amps operating near 5 V or 3.3 V rails. |
Use Scenario: Safeguarding CAN_H and CAN_L lines in vehicle gateway modules against ESD (IEC 61000-4-2) and burst noise (IEC 61000-4-4). IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line) providing symmetrical clamping without disrupting differential signaling integrity or common-mode rejection. Use Value: Maintains <500 mV common-mode offset during 3000 W transients, ensuring CAN transceivers remain operational and bit error rate stays below 10⁻¹². |
| Power Supply Input Protection | Telecom Line Card Surge Suppression |
Use Scenario: Guarding 48 V DC input rails of industrial PLC I/O modules against induced surges from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Primary shunt protector upstream of DC-DC converters and LDOs, absorbing energy before it reaches sensitive regulation circuitry. Use Value: Withstands repeated 3000 W pulses without degradation, extending system uptime and eliminating need for fuse replacement after surge events. |
Use Scenario: Protecting Ethernet PHY interface and PoE-powered circuitry in telecom base station line cards from lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Front-line TVS on each twisted pair, coordinated with gas discharge tubes (GDTs) in hybrid protection schemes for multi-stage clamping. Use Value: Achieves <10 ns response time and clamps to 103 V, reducing let-through energy by >85% compared to unclamped 1 kV/500 A surges per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K64CAHM3_A | Same electrical specs and AEC-Q101 qualification; differs only in ordering suffix (_A denotes updated packaging/reel coding per Vishay revision). | No functional difference; intended for same automotive and industrial use cases with identical layout and thermal design. | Select SMC3K64CAHM3_A for new designs requiring latest Vishay documentation and traceability; SMC3K64CAHM3/9A remains valid for legacy BOMs using 13" reel delivery. |
| SMC3K70CAHM3/9A | Higher VWM (70 V), higher VBR (77.8–86.0 V), lower IPPM (26.5 A), and higher VC (113 V); otherwise identical package and qualification. | Better suited for 60 V nominal systems (e.g., commercial vehicle 24 V+ architectures) where higher stand-off margin is needed before clamping engages. | Choose SMC3K70CAHM3/9A when protecting circuits with wider voltage tolerances or where reduced clamping frequency is acceptable to avoid false triggering. |
Compared with SMC3K64CAHM3/9A, SMC3K64CAHM3_A offers identical protection performance with updated logistics coding, while SMC3K70CAHM3/9A trades lower clamping responsiveness for higher stand-off voltage-making it preferable in 60 V systems but less optimal for tight-margin 48 V applications.
Availability
SMC3K64CAHM3/9A is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface hardening, and 48 V power supply input surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K64CAHM3/9A 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 validation.
The SMC3KxxCA family delivers high-power transient suppression for automotive and industrial environments, engineered to meet AEC-Q101 and IEC/EN 61000-4-x standards while supporting automated SMT assembly and harsh-temperature operation.
FAQ
What does the "HM3" suffix indicate in SMC3K64CAHM3/9A?
The HM3 suffix in SMC3K64CAHM3/9A denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this grade from commercial M3 variants and confirms suitability for automotive applications requiring extended reliability validation and environmental compliance.
Is SMC3K64CAHM3/9A suitable for new designs?
No-Vishay explicitly labels SMC3K64CAHM3/9A as "Not for New Designs" in its official documentation (Document Number: 89433, Revision: 13-Sep-2022). Engineers designing new products should evaluate the recommended alternative SMC3K64CAHM3_A or higher-voltage variants like SMC3K70CAHM3/9A for continued support and updated specifications.
What is the clamping voltage of SMC3K64CAHM3/9A at its rated peak pulse current?
The SMC3K64CAHM3/9A has a maximum clamping voltage (VC) of 103 V at its rated peak pulse current (IPPM) of 29.1 A, measured under the standardized 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
How does the bidirectional polarity of SMC3K64CAHM3/9A affect PCB layout?
The bidirectional polarity of SMC3K64CAHM3/9A eliminates orientation constraints during placement-either terminal can connect to the protected line or ground without affecting functionality. This simplifies layout for differential or floating interfaces and avoids polarity-related assembly errors in high-volume automotive manufacturing.
What is the maximum junction temperature rating for SMC3K64CAHM3/9A?
The SMC3K64CAHM3/9A has a maximum junction temperature (TJ max) rating of +150 °C, enabling reliable operation in under-hood automotive environments and industrial enclosures where ambient temperatures exceed 105 °C. Derating curves in the datasheet define safe power dissipation above 25 °C ambient.
SMC3K64CAHM3/9A 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K64CAHM3/9A FAQ
1.How can I place an order for SMC3K64CAHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K64CAHM3/9A 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 SMC3K64CAHM3/9A reliable?
The price and inventory of SMC3K64CAHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K64CAHM3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K64CAHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K64CAHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K64CAHM3/9A?
SMC3K64CAHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K64CAHM3/9A 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 SMC3K64CAHM3/9A?
For technical support, including SMC3K64CAHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K64CAHM3/9A requirements.
6.How does Aetrix verify that SMC3K64CAHM3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K64CAHM3/9A 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 SMC3K64CAHM3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K64CAHM3/9A?
All SMC3K64CAHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K64CAHM3/9A, 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 SMC3K64CAHM3/9A part is unused and in its original packaging.
Return procedure for SMC3K64CAHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K64CAHM3/9A Tags
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