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Taiwan Semiconductor Corporation SMCJ64C
- Part No.:
- SMCJ64C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ64C.pdf
- Description:
- 1500W, 79V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,678
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Product details
Overview
SMCJ64C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 64V working stand-off voltage (VWM), 71.1–86.9V breakdown voltage (VBR), and 114V maximum clamping voltage (VC) at 13.8A peak pulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ64C datasheet, SMCJ64C pinout, SMCJ64C application, or SMCJ64C equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature derating above 25°C, moisture sensitivity level (MSL 1), and unidirectional polarity marking for correct PCB orientation.
Technical Context
The SMCJ64C employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps rise time from 0 V to VBR min) and low leakage (<1 µA at 64 V). Its thermal design supports 150°C max junction temperature with RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation in high-ambient industrial environments.
As a unidirectional TVS, it conducts only during reverse overvoltage events and blocks forward current up to 3.5 V at 100 A (per spec note 2), making it suitable for DC power line protection where polarity is fixed and forward conduction must be minimized.
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 / 86.9 V at 1 mA - ensures reliable triggering across process variation and temperature |
| VC @ IPPM | 114 V at 13.8 A - limits downstream voltage stress during 10/1000 µs surge per IEC 61000-4-5 |
| PPK | 1500 W - peak pulse power handling capability for short-duration transients |
| IR @ VWM | <1 µA - negligible standby leakage, critical for battery-backed or low-power systems |
| TJ max | +150 °C - enables use in under-hood automotive or enclosed industrial enclosures |
| Package | DO-214AB (SMC) - surface-mount footprint compatible with automated placement and IPC-7351B standard |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional polarity, 0.210 g weight, UL 94V-0 rated compound, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or low-side return path; defines clamping reference point |
| Cathode | Reverse voltage input / Clamping node | Connected to protected line (e.g., 64 V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low IR over lifetime and humidity exposure per J-STD-020 MSL 1 |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (load dump) waveforms |
| Fast response time | <1.0 ps from 0 V to VBR min - protects sensitive ICs before transient energy couples into traces |
| Halogen-free construction | Meets IEC 61249-2-21 - supports RoHS-compliant and environmentally regulated end equipment |
| Automated placement compatibility | DO-214AB geometry and lead coplanarity meet J-STD-002 solderability requirements |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12 V/24 V vehicle power distribution network exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and ECU input stage to clamp transients before they reach LDOs or microcontrollers. Use Value: Limits clamped voltage to ≤114 V during 13.8 A 10/1000 µs surge, preventing latch-up or gate oxide damage in downstream semiconductors. | Use Scenario: Digital input module in programmable logic controller subjected to field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V sensor supply line, coordinated with series impedance and filtering. Use Value: Withstands ≥1000 surges at rated PPK while maintaining <1 µA leakage - preserves signal integrity and long-term reliability in harsh factory environments. |
| LED Driver Output Protection | Telecom DC Power Interface |
Use Scenario: Constant-current LED driver output driving long cables susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: Final-stage TVS on driver output to absorb induced common-mode transients before reaching LED string. Use Value: 1500 W peak power rating handles multi-kV induced surges without degradation; DO-214AB thermal mass sustains repeated events. | Use Scenario: -48 V telecom power feed entering remote radio unit enclosure with limited internal filtering. IC Role / Device Role / Timing Role: First-line unidirectional clamp on DC input, upstream of DC-DC converter and monitoring circuitry. Use Value: Clamps to 114 V within <1 ps, limiting stress on 100 V-rated input capacitors and enabling compact front-end design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | 600 W PPK, SMB package (smaller footprint, higher RθJA = 85°C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a (load dump) | Select SMCJ64C when 1500 W surge immunity and automotive-grade thermal robustness are required. |
| 1.5KE68A | Through-hole DO-201 package, same 1500 W rating but slower response (>1 ns) and no ISO 7637-2 validation | Not recommended for automated SMT lines; requires manual assembly and larger board area | Choose SMCJ64C for surface-mount production, faster clamping, and certified automotive transient immunity. |
Compared with SMBJ64A and 1.5KE68A, the SMCJ64C delivers superior surge margin in automotive and industrial settings due to its validated ISO 7637-2 compliance, sub-picosecond response, and DO-214AB thermal performance - making it the preferred choice for high-reliability SMT power rail protection.
Availability
SMCJ64C is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting drivers, and telecom power interfaces requiring stable component supply and full traceability.
Supply support for SMCJ64C 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.
The SMCJ series is part of TSC's high-power transient suppression product line, engineered specifically for automotive, industrial, and telecom applications demanding robust ISO 7637-2 and IEC 61000-4-5 compliance in compact SMT packages.
FAQ
What is the clamping voltage of the SMCJ64C under a 10/1000 µs surge?
The SMCJ64C has a maximum clamping voltage (VC) of 114 V at 13.8 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per Fig.5 in the datasheet and represents the upper limit of voltage seen by downstream components during worst-case transient events, ensuring compatibility with 100 V-rated system components.
Is the SMCJ64C suitable for bidirectional transient protection?
No, the SMCJ64C is unidirectional and intended only for DC circuits with fixed polarity. For bidirectional protection, the SMCJ64CA variant must be used - it features symmetrical breakdown in both directions and is marked with a "C" suffix. Using SMCJ64C in AC or reversible-polarity applications risks failure during forward surges.
Does the SMCJ64C meet automotive qualification standards?
Yes, the SMCJ64C meets ISO 7637-2 test requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (load dump), and is manufactured to AEC-Q200 stress test guidelines for passive components. Its MSL 1 rating and 150°C TJ max further support under-hood deployment.
What is the forward voltage drop of the SMCJ64C at high current?
The SMCJ64C exhibits a forward voltage (VF) of 3.5 V at 100 A, consistent with all SMCJ5.0–SMCJ90 unidirectional devices. This low VF minimizes conduction loss during fault conditions and reduces thermal stress during sustained overcurrent events, supporting reliable operation in high-current protection schemes.
How does the SMCJ64C compare to the SMCJ64A variant?
The SMCJ64A offers tighter breakdown voltage tolerance (71.1–78.6 V vs. 71.1–86.9 V for SMCJ64C), resulting in more predictable clamping onset. However, SMCJ64C provides broader process margin and is preferred in cost-sensitive, high-volume applications where absolute VBR consistency is less critical than overall surge robustness and supply chain stability.
SMCJ64C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- 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:
- 114V
- Current - Peak Pulse (10/1000µs):
- 13.8A
- 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)
SMCJ64C FAQ
1.How can I place an order for SMCJ64C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ64C 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 SMCJ64C reliable?
The price and inventory of SMCJ64C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ64C is usually 5 days.
3.What payment methods are accepted for SMCJ64C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ64C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ64C?
SMCJ64C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ64C 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 SMCJ64C?
For technical support, including SMCJ64C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ64C requirements.
6.How does Aetrix verify that SMCJ64C is sourced from the original manufacturer or authorized distributors?
All SMCJ64C 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 SMCJ64C meets industry standards.
7.What is the process for return or replacement of SMCJ64C?
All SMCJ64C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ64C, 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 SMCJ64C part is unused and in its original packaging.
Return procedure for SMCJ64C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ64C Tags
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