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Vishay General Semiconductor - Diodes Division SMCJ64AHM3_A/H
- Part No.:
- SMCJ64AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ64AHM3_A/H.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ64AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM). It clamps transients to ≤103 V at 14.6 A IPPM and operates from −55 °C to +150 °C, targeting automotive power rail and industrial sensor line protection.
For engineers reviewing the SMCJ64AHM3_A/H datasheet, SMCJ64AHM3_A/H pinout, SMCJ64AHM3_A/H application, or SMCJ64AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 suffix, 10/1000 µs waveform clamping performance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its unidirectional polarity features a cathode band marking and supports peak forward surge current up to 200 A (8.3 ms half-sine).
Thermal design relies on RθJL = 15 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient), requiring minimum pad layout per JEDEC MO-136 for rated PPPM derating above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold. |
| VBR min/max | 71.1 V / 78.6 V at IT = 1.0 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM under production tolerance. |
| VC @ IPPM | 103 V at 14.6 A - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 1500 W - Peak transient energy handling capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V rails. |
| TJ max | +150 °C - Junction temperature limit supporting under-hood automotive use and high-ambient industrial environments. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; ensures minimal quiescent power loss in battery-powered systems. |
| Package | SMC (DO-214AB) - Standardized 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for high-current thermal path. |
Pinout & Package
SMCJ64AHM3_A/H is housed in an SMC (DO-214AB) package with two terminals: anode and cathode. The cathode is marked by a visible band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR. |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications per stress test requirements including HTOL, TCT, and ESD. |
| Halogen-free & RoHS-compliant (HM3) | Meets IEC 61249-2-21 and JEDEC J-STD-20 MSL level 1 (260 °C peak reflow), enabling lead-free assembly without reliability compromise. |
| 1500 W peak pulse power | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 combination wave surges in 12 V/24 V systems. |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes voltage overshoot across protected components, reducing risk of gate oxide rupture in MOSFETs and latch-up in microcontrollers. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved moisture resistance versus epoxy-passivated alternatives, critical for under-hood durability. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply lines feeding engine control units (ECUs) and body control modules (BCMs) from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going surges exceeding 64 V. Use Value: Limits peak voltage to ≤103 V during 1500 W surges, preventing damage to 36 V-rated DC-DC converters and CAN transceivers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt induced lightning-induced surges on 4–20 mA or 0–10 V signal lines. Use Value: Sub-ns response ensures clamping before transient propagates into op-amp front-end, preserving measurement integrity and ADC accuracy. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding AC/DC adapter inputs in PoE-powered network switches from AC line surges and cross-talk coupling. IC Role / Device Role / Timing Role: Primary-side TVS on secondary-side DC bus (e.g., 48 V output) to absorb repetitive switching transients from synchronous rectifiers. Use Value: 1.0 µA leakage at 64 V avoids measurable standby current increase, maintaining Energy Star compliance. |
Use Scenario: Suppressing commutation spikes generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp inductive kickback during PWM switching cycles. Use Value: 200 A IFSM rating withstands repeated 8.3 ms surges from motor stall conditions without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/57T | Lower PPPM (400 W), SMA package (smaller thermal mass), same VWM/VBR range. | Limited to lower-energy surges (e.g., IEC 61000-4-4 EFT); unsuitable for load dump or ISO 7637-2 Pulse 5a. | Select only when board space is constrained and surge threat level is ≤400 W. |
| SMCJ64AHE3_A/H | Same electrical specs but E3 suffix: RoHS-compliant, commercial-grade (non-AEC-Q101), non-halogen-free. | Approved for industrial/commercial use only; not certified for automotive under-hood deployment. | Choose for cost-sensitive non-automotive designs where AEC-Q101 and halogen-free are not required. |
Compared with SMCJ64AHM3_A/H, SMAJ64A-E3/57T offers smaller footprint but sacrifices 73% peak power handling, while SMCJ64AHE3_A/H matches performance but lacks automotive qualification and halogen-free compliance-making SMCJ64AHM3_A/H the sole option meeting all three criteria: 1500 W, AEC-Q101, and halogen-free.
Availability
SMCJ64AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power supplies, and consumer appliance motor drives requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ64AHM3_A/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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMCJ series was engineered specifically for high-power transient suppression in harsh environments, emphasizing AEC-Q101 qualification, robust thermal performance, and consistent clamping behavior across temperature and lifetime.
FAQ
What is the clamping voltage of SMCJ64AHM3_A/H at its rated peak pulse current?
The SMCJ64AHM3_A/H clamps to a maximum of 103 V when subjected to its rated peak pulse current of 14.6 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024. The clamping voltage directly determines the maximum stress seen by downstream components during surge events, making it a critical parameter for circuit survivability validation. SMCJ64AHM3_A/H maintains this performance across its full operating temperature range.
Is SMCJ64AHM3_A/H qualified for automotive applications?
Yes, SMCJ64AHM3_A/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and explicitly noted in the Vishay datasheet. This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and electrostatic discharge (ESD), validating its suitability for under-hood and chassis-mounted automotive systems. The SMCJ64AHM3_A/H meets the reliability and robustness requirements for engine control, body electronics, and ADAS power domains where sustained operation at 150 °C junction temperature is required.
What does the "HM3" suffix mean in SMCJ64AHM3_A/H?
The "HM3" suffix in SMCJ64AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3) and confirms compliance with JEDEC J-STD-20 MSL level 1 (peak reflow temperature 260 °C) and JESD 201 class 2 whisker resistance. The HM3 designation ensures the SMCJ64AHM3_A/H meets environmental and process requirements for modern automotive and industrial manufacturing, including lead-free soldering and long-term material stability.
How does SMCJ64AHM3_A/H compare to bidirectional TVS diodes like SMCJ64CA?
SMCJ64AHM3_A/H is unidirectional and optimized for DC power line protection where only positive-going transients occur, offering lower leakage (1.0 µA vs. 10 µA for SMCJ64CA at VWM) and higher IFSM (200 A vs. N/A for bidirectional). In contrast, SMCJ64CA protects AC or dual-polarity signals but cannot handle forward surge current. For 12 V automotive supply rails, SMCJ64AHM3_A/H provides superior efficiency and surge margin, while SMCJ64CA would be selected only for symmetrical signal line protection such as RS-485 or CAN bus.
What PCB layout guidance applies to SMCJ64AHM3_A/H for optimal thermal and surge performance?
For optimal performance, SMCJ64AHM3_A/H must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. These pads provide necessary thermal dissipation for 6.5 W steady-state power and sustain 1500 W transient pulses. Trace width should be ≥20 mils, and ground planes should be solid beneath the device. Avoid thermal relief on cathode/anode pads, and keep high-dI/dt paths short to minimize inductive voltage overshoot during clamping. SMCJ64AHM3_A/H thermal resistance drops significantly only when these layout rules are followed.
SMCJ64AHM3_A/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):
- 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)
SMCJ64AHM3_A/H FAQ
1.How can I place an order for SMCJ64AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ64AHM3_A/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 SMCJ64AHM3_A/H reliable?
The price and inventory of SMCJ64AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ64AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ64AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ64AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ64AHM3_A/H?
SMCJ64AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ64AHM3_A/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 SMCJ64AHM3_A/H?
For technical support, including SMCJ64AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ64AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ64AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ64AHM3_A/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 SMCJ64AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ64AHM3_A/H?
All SMCJ64AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ64AHM3_A/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 SMCJ64AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ64AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ64AHM3_A/H Tags
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