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Vishay General Semiconductor - Diodes Division SMCJ64CAHM3/H
- Part No.:
- SMCJ64CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ64CAHM3/H.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,538
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Product details
Overview
SMCJ64CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 64 V standoff voltage (VWM), and 103 V maximum clamping voltage (VC) at 14.6 A peak pulse current (IPPM). It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ64CAHM3/H datasheet, SMCJ64CAHM3/H pinout, SMCJ64CAHM3/H application, or SMCJ64CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with 10/1000 µs surge waveforms in harsh environments.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions (VBR min/max = 71.1 V / 78.6 V at IT = 1 mA), enabling robust transient suppression on AC-coupled or floating signal/power rails. Its low incremental surge resistance and fast response time ensure effective energy diversion before downstream components experience overvoltage stress.
Thermal design is supported by RθJA = 75 °C/W and RθJL = 15 °C/W, with operation rated from –55 °C to +150 °C junction temperature. The SMCJ64CAHM3/H variant carries HM3 suffix indicating halogen-free, RoHS-compliant, and AEC-Q101 qualified construction - validated for automotive-grade reliability under JEDEC JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - guaranteed symmetric breakdown threshold for bidirectional protection |
| VC @ IPPM | 103 V at 14.6 A - clamped voltage during 10/1000 µs surge, limiting stress on protected circuitry |
| PPPM | 1500 W - peak pulse power handling per IEEE C62.35 standard, defining surge robustness |
| TJ max. | +150 °C - enables use in under-hood automotive and high-temperature industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal relief |
| AEC-Q101 | Qualified - certified for automotive electronic systems per stress test requirements |
Pinout & Package
SMCJ64CAHM3/H uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two terminals, no polarity marking (bidirectional), matte tin-plated leads solderable per J-STD-002 and JESD22-B102, and MSL Level 1 moisture sensitivity rating (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | Connected to protected line or ground reference depending on layout; no cathode band marking |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Electrically identical to Anode under reverse bias; symmetrical conduction enables AC rail protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or floating DC rails without polarity concerns |
| AEC-Q101 qualification | Validated for automotive powertrain, body control, and ADAS modules requiring long-term reliability under thermal cycling and vibration |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow assembly with JEDEC-compliant thermal profile |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted on 8 mm × 8 mm copper pads |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes let-through voltage during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs and ICs |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple-induced spikes. IC Role / Device Role / Timing Role: Primary clamping element placed at input filter stage, shunting surge energy to chassis ground before LDOs and microcontrollers. Use Value: Clamps 103 V at 14.6 A, limiting voltage seen by downstream regulators to safe levels while surviving repeated 1500 W pulses. | Use Scenario: Shielding analog front-end inputs of pressure/temperature sensors in PLC I/O modules from ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pairs (e.g., RS-485, CAN FD stubs) to suppress ±15 kV HBM ESD and 40 A lightning-induced surges. Use Value: Symmetric VBR ensures equal clamping on both polarities, preserving signal integrity without DC offset or rectification effects. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against induced surges from nearby AC mains or lightning coupling. IC Role / Device Role / Timing Role: Secondary-level protector after gas discharge tube (GDT), absorbing residual energy and limiting let-through voltage to PHY IC absolute maximum ratings. Use Value: 103 V VC ensures PHY's 100 V abs max rating is not exceeded during combined GDT+TVS coordinated protection. | Use Scenario: Suppressing back-EMF transients generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp inductive kickback before it reaches gate drivers and MCU GPIOs. Use Value: 1500 W PPPM rating handles repetitive 100–200 A inrush currents without degradation, supporting >100,000 cycle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CAHE3/A | Lower PPPM (400 W), SMA package (smaller thermal mass), same VWM/VC but higher RθJA (110 °C/W) | Suitable only for lower-energy transients; limited to consumer-grade non-automotive use | Select when board space is constrained and surge threat level is ≤IEC 61000-4-2 Level 3 |
| 1.5KE64CA | Through-hole DO-201 package, same VWM/VC/PPPM, but no AEC-Q101 or halogen-free certification | Not qualified for automotive; requires wave soldering or hand assembly; less suitable for automated SMT lines | Choose for legacy through-hole designs or cost-sensitive industrial applications where AEC-Q101 is not mandated |
Compared with SMAJ64CAHE3/A and 1.5KE64CA, the SMCJ64CAHM3/H delivers superior thermal performance (RθJL = 15 °C/W), automotive qualification, and SMT process compatibility - making it optimal for high-reliability, high-volume automotive and industrial power electronics.
Availability
SMCJ64CAHM3/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ64CAHM3/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 SMCJ series was developed for high-power transient suppression in demanding environments - particularly automotive, industrial, and telecom infrastructure - where robustness, consistency, and regulatory compliance are critical.
FAQ
What does the 'HM3' suffix indicate in SMCJ64CAHM3/H?
The HM3 suffix in SMCJ64CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC JESD201 Class 2 whisker testing and suitability for automotive applications. This distinguishes SMCJ64CAHM3/H from commercial-grade variants like SMCJ64CA-E3 and ensures long-term reliability in thermally stressed environments.
Is SMCJ64CAHM3/H bidirectional, and how does that affect its placement?
Yes, SMCJ64CAHM3/H is a bidirectional TVS diode - meaning it clamps voltage surges equally in both polarities without polarity marking. This allows placement across AC-coupled lines, differential buses (e.g., CAN, RS-485), or floating DC rails without concern for orientation. Unlike unidirectional types, it has no cathode band and must be mounted with both terminals connected symmetrically to the protected nodes.
What is the maximum clamping voltage (VC) of SMCJ64CAHM3/H, and why does it matter?
The maximum clamping voltage (VC) of SMCJ64CAHM3/H is 103 V at 14.6 A (10/1000 µs waveform). This value defines the highest voltage imposed on protected circuitry during a surge event. A lower VC relative to VWM (clamping ratio = 1.61) ensures downstream components - such as 75 V-rated MOSFETs or 100 V PHY ICs - remain within absolute maximum ratings, preventing catastrophic failure or latent damage.
Can SMCJ64CAHM3/H replace SMCJ64A in a design?
No - SMCJ64CAHM3/H is bidirectional, while SMCJ64A is unidirectional. Substituting them without layout review risks improper clamping on negative transients or forward conduction during normal operation. The unidirectional version has a cathode band and conducts forward current (VF ≈ 3.5 V at 100 A); the CA variant does not. Use SMCJ64CAHM3/H only where bidirectional protection is explicitly required and verified in system-level surge testing.
What PCB layout practices maximize thermal performance for SMCJ64CAHM3/H?
To maximize thermal performance, mount SMCJ64CAHM3/H on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, with internal thermal vias connecting to inner-layer ground planes. Avoid narrow traces between the device and ground; use polygon pours instead. Ensure reflow profile meets J-STD-020 MSL Level 1 requirements (peak 260 °C), and verify post-assembly solder joint integrity using X-ray or cross-section analysis for automotive applications.
SMCJ64CAHM3/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:
- Discontinued at Digi-Key
- 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):
- 14.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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)
SMCJ64CAHM3/H FAQ
1.How can I place an order for SMCJ64CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ64CAHM3/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 SMCJ64CAHM3/H reliable?
The price and inventory of SMCJ64CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ64CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ64CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ64CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ64CAHM3/H?
SMCJ64CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ64CAHM3/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 SMCJ64CAHM3/H?
For technical support, including SMCJ64CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ64CAHM3/H requirements.
6.How does Aetrix verify that SMCJ64CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ64CAHM3/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 SMCJ64CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ64CAHM3/H?
All SMCJ64CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ64CAHM3/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 SMCJ64CAHM3/H part is unused and in its original packaging.
Return procedure for SMCJ64CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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