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Vishay General Semiconductor - Diodes Division SMCJ64A-M3/9AT
- Part No.:
- SMCJ64A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ64A-M3/9AT.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,304
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Product details
Overview
SMCJ64A-M3/9AT 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. It features a 64 V stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 14.6 A peak pulse current (IPPM), and clamps to ≤103 V under surge. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ64A-M3/9AT datasheet, SMCJ64A-M3/9AT pinout, SMCJ64A-M3/9AT application, or SMCJ64A-M3/9AT equivalent, key selection criteria include unidirectional polarity, 1500 W surge rating, 103 V clamping voltage at rated IPPM, SMC package thermal performance (RθJA = 75 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds VBR to limit transient overvoltage. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM), while the SMC package supports automated placement and meets MSL level 1 (260 °C reflow).
It delivers fast response time (<1 ns), low incremental surge resistance, and is rated for -55 °C to +150 °C operating junction temperature. The M3 suffix confirms halogen-free, RoHS-compliant construction suitable for commercial-grade applications requiring environmental compliance without AEC-Q101 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 71.1 V / 78.6 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients without premature conduction. |
| VC @ IPPM | ≤103 V at 14.6 A - Clamping voltage under 1500 W 10/1000 µs surge; determines maximum stress on protected downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; defines energy absorption capacity for lightning or inductive-switching surges. |
| IPPM | 14.6 A - Peak pulse current corresponding to PPPM; used to size PCB copper pads (8.0 mm × 8.0 mm recommended). |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient; informs derating requirements above 25 °C ambient temperature. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, matte tin-plated leads. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV) surges without degradation in standard PCB layouts. |
| Clamping voltage ≤103 V at 14.6 A | Limits voltage overshoot across protected ICs or MOSFETs, preserving gate oxide integrity and logic-level compatibility. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at 64 V), critical for low-power sensor interfaces. |
| MSL level 1 moisture sensitivity | Permits standard SMT reflow without baking; compatible with high-volume automated assembly processes. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets global environmental regulations and eliminates corrosive halogen emissions during end-of-life recycling or fire scenarios. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in body control modules from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 103 V surges within 1 ns, preventing damage to buck controller ICs rated for 65 V absolute maximum input. | Use Scenario: Shielding PLC analog input channels from ESD and switching noise induced by nearby contactors. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point, shunting transients to chassis ground. Use Value: 1500 W rating absorbs repetitive 1 kV/500 A transients per IEC 61000-4-4, maintaining signal integrity over 10+ years of field operation. |
| Telecom Base Station DC Feeds | Consumer Appliance Power Supplies |
Use Scenario: Safeguarding remote radio unit (RRU) power inputs against lightning-induced surges on outdoor cable runs. IC Role / Device Role / Timing Role: Primary clamping device upstream of bulk capacitor and secondary TVS stages. Use Value: 75 °C/W RθJA allows direct mounting on metal heatsink plates, sustaining 1500 W pulses without thermal runaway. | Use Scenario: Protecting AC-DC adapter primary-side rectifier outputs from mains-borne transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across bridge rectifier output to clamp inductive kickback from transformer leakage. Use Value: 14.6 A IPPM handles 10/1000 µs surges exceeding EN 61000-4-5 requirements, eliminating need for series impedance matching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A-M3/57T | Same electrical specs but SMB (DO-214AA) package; lower PPPM (600 W), smaller footprint, higher RθJA (110 °C/W). | Lower surge energy handling; suitable only for sub-600 W threat profiles or space-constrained consumer designs. | Select when board area is critical and surge threats are limited to IEC 61000-4-2 ESD or low-energy transients. |
| SMCJ64CA-M3/9AT | Bidirectional variant; identical VWM, VBR, PPPM, and package; symmetric clamping in both polarities. | Required for AC-coupled lines or bidirectional data buses where reverse polarity transients occur. | Choose only if protecting differential signals, telecom lines, or circuits exposed to reversible voltage spikes. |
Compared with SMBJ64A-M3/57T, SMCJ64A-M3/9AT provides 2.5× higher surge energy absorption and better thermal dissipation; versus SMCJ64CA-M3/9AT, it offers optimized cost and lower capacitance for unidirectional DC rail protection where polarity is fixed.
Availability
SMCJ64A-M3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive inputs, telecom base station DC feeds, and consumer appliance power supplies requiring stable component supply and long-term production continuity.
Supply support for SMCJ64A-M3/9AT 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 is engineered for high-energy transient suppression in harsh environments-designed to meet automotive, industrial, and telecom surge immunity standards while supporting automated manufacturing and environmental compliance.
FAQ
What is the clamping voltage of the SMCJ64A-M3/9AT under full-rated surge current?
The SMCJ64A-M3/9AT clamps to a maximum of 103 V when subjected to its rated 14.6 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees predictable overvoltage limiting for downstream components such as 65 V-rated DC-DC controllers. The SMCJ64A-M3/9AT maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is the SMCJ64A-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
No, the SMCJ64A-M3/9AT is not AEC-Q101 qualified. It carries the M3 suffix indicating halogen-free, RoHS-compliant commercial-grade construction. For automotive applications requiring AEC-Q101, select the HM3-suffixed variant (e.g., SMCJ64A-HM3/9AT), which undergoes additional stress testing and process controls. The SMCJ64A-M3/9AT remains appropriate for non-safety-critical automotive subsystems where qualification is not mandated.
What is the thermal resistance and how does it affect PCB layout for the SMCJ64A-M3/9AT?
The SMCJ64A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This value directly impacts power derating: at 70 °C ambient, its 6.5 W steady-state power dissipation drops to ~4.3 W. To maintain reliability, use minimum recommended pad dimensions and avoid thermal isolation; the SMCJ64A-M3/9AT relies on copper mass for heat spreading during surge events.
How does the SMCJ64A-M3/9AT differ from the bidirectional SMCJ64CA-M3/9AT?
The SMCJ64A-M3/9AT is unidirectional with cathode marking and conducts only during reverse overvoltage, while the SMCJ64CA-M3/9AT is bidirectional with no polarity marking and clamps symmetrically in both directions. Both share identical VWM (64 V), VBR, PPPM (1500 W), and SMC package. The SMCJ64A-M3/9AT offers lower junction capacitance and is preferred for DC rail protection; the CA version is mandatory for AC lines or differential buses.
What is the maximum reverse leakage current of the SMCJ64A-M3/9AT at its stand-off voltage?
The SMCJ64A-M3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 64 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves efficiency in always-on systems and avoids false triggering in high-impedance sensor bias networks. Leakage remains below 5 µA up to +125 °C, ensuring stable performance across industrial temperature ranges. The SMCJ64A-M3/9AT achieves this via glass-passivated junction technology.
SMCJ64A-M3/9AT 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ64A-M3/9AT FAQ
1.How can I place an order for SMCJ64A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ64A-M3/9AT 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 SMCJ64A-M3/9AT reliable?
The price and inventory of SMCJ64A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ64A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ64A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ64A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ64A-M3/9AT?
SMCJ64A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ64A-M3/9AT 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 SMCJ64A-M3/9AT?
For technical support, including SMCJ64A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ64A-M3/9AT requirements.
6.How does Aetrix verify that SMCJ64A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ64A-M3/9AT 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 SMCJ64A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ64A-M3/9AT?
All SMCJ64A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ64A-M3/9AT, 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 SMCJ64A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ64A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ64A-M3/9AT Tags
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