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Taiwan Semiconductor Corporation SMDJ64CA
- Part No.:
- SMDJ64CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ64CA.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,683
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Product details
Overview
SMDJ64CA from Taiwan Semiconductor is a bidirectional 64V standoff transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 3000W peak pulse power, 103V clamping voltage at 29.1A peak current, and -55°C to +175°C operating junction temperature. It protects telecom, industrial, and consumer electronics against ESD, lightning-induced surges, and load-switch transients.
For engineers reviewing the SMDJ64CA datasheet, SMDJ64CA pinout, SMDJ64CA application, or SMDJ64CA equivalent, key selection criteria include bidirectional clamping behavior, 64V working voltage, 103V max clamping at 29.1A, DO-214AB thermal performance (RθJA = 75°C/W), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance.
Technical Context
The SMDJ64CA is a glass-passivated, single-die, bidirectional TVS diode designed for surface-mount surge immunity. Its breakdown voltage is specified at 71.1–78.6V with 1mA test current, and it delivers sub-1ps response time to clamp fast transients before sensitive circuitry is damaged.
It operates across -55°C to +175°C junction temperature range, supports 300A non-repetitive forward surge (8.3ms half-sine), and maintains <1µA reverse leakage at 64V standoff - enabling reliable protection in automotive-grade and industrial environments without derating at elevated ambient temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT=1mA | 71.1–78.6 V - guaranteed breakdown threshold defining turn-on precision |
| VC @ IPPM=29.1A | 103 V - maximum clamped voltage during 3000W transient, limiting stress on downstream ICs |
| PPK | 3000 W - peak pulse power handling per 10/1000µs waveform, per Fig.5 |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance, critical for PCB layout and heatsinking decisions |
| Junction Temp Range | -55°C to +175°C - enables deployment in under-hood automotive or high-temp industrial enclosures |
Pinout & Package
DO-214AB (SMC) surface-mount package with matte tin-plated leads; polarity indicated by cathode band (bidirectional operation means band denotes common terminal, not unidirectional anode/cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Common terminal for bidirectional clamping | Both terminals behave identically - no polarity sensitivity; band serves as mechanical orientation marker only |
| Opposite terminal | Common terminal for bidirectional clamping | Electrically symmetric with marked terminal; enables placement without orientation verification |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive-level supply-line transient immunity without additional filtering |
| Moisture sensitivity level 1 (J-STD-020) | Zero bake requirement before reflow - compatible with standard SMT assembly lines |
| UL 94V-0 molding compound | Self-extinguishing encapsulation meets fire-safety requirements for enclosed equipment |
Applications
| Telecom Line Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting RS-485/RS-232 data lines in base stations and network switches from induced lightning surges and ESD events. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across differential pair or line-to-ground to shunt >1kV transients. Use Value: 103V clamping ensures connected PHY ICs (e.g., MAX3485) remain below absolute maximum ratings during 3000W surges. | Use Scenario: Safeguarding analog input channels (4–20mA, 0–10V) and digital outputs in programmable logic controllers exposed to motor switching noise. IC Role / Device Role / Timing Role: Primary overvoltage clamp at field-side connector interface, upstream of signal conditioning circuitry. Use Value: 64V VWM allows compatibility with 48V DC control systems while rejecting 103V transients before op-amps or ADCs are stressed. |
| Automotive Body Control Module | Consumer Power Adapter Input Stage |
Use Scenario: Suppressing load-dump and jump-start transients on 12V/24V power rails feeding microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Secondary surge protection stage after fuse and primary LC filter, directly at MCU power entry point. Use Value: 175°C max junction temperature and ISO 7637-2 validation enable direct integration into under-dash modules without thermal derating. | Use Scenario: Clamping AC/DC adapter input rectifier output against surge events from mains switching or nearby lightning strikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor to limit voltage overshoot during transient conduction. Use Value: 3000W peak rating handles 10/1000µs surges exceeding IEC 61000-4-5 Level 4 without degradation, extending adapter lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC64CA (Littelfuse) | Same 64V VWM, 103V VC, but 2500W PPK; slightly higher RθJA (80°C/W) | Limited to lower-energy transients; less margin for repeated surge exposure | Acceptable where system-level testing confirms 2500W suffices and thermal layout accommodates higher junction rise |
| SMCJ64CA (ON Semiconductor) | Identical VWM/VC/PPK; same DO-214AB package; tighter VBR tolerance (±5% vs ±6.5% for SMDJ64CA) | No functional difference; validated in identical automotive and industrial reference designs | Drop-in alternative when tighter breakdown consistency is required for high-volume production binning |
Compared with SAC64CA and SMCJ64CA, the SMDJ64CA offers the highest peak power rating (3000W) among 64V bidirectional SMC-packaged TVS diodes and is uniquely qualified to ISO 7637-2 Pulse 2b and 3b - making it preferred for automotive body electronics requiring robust load-dump immunity.
Availability
SMDJ64CA is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and automotive body control modules requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMDJ64CA 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers since 1979.
The SMDJ series was developed specifically for high-power, surface-mount surge protection in automotive, industrial, and telecom applications where reliability under repetitive transient stress is mandatory.
FAQ
What is the clamping voltage of the SMDJ64CA at its rated peak pulse current?
The SMDJ64CA has a maximum clamping voltage (VC) of 103 V at 29.1 A peak pulse current (IPPM), measured under the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a 3000W transient event and is guaranteed across the full operating temperature range.
Is the SMDJ64CA unidirectional or bidirectional, and how does that affect PCB layout?
The SMDJ64CA is a bidirectional TVS diode, indicated by the "CA" suffix. Its terminals are electrically symmetric - no anode or cathode distinction - so PCB layout requires no polarity alignment. The cathode band serves only as a mechanical orientation marker, simplifying automated placement and eliminating risk of reverse installation.
Does the SMDJ64CA meet automotive transient immunity standards?
Yes, the SMDJ64CA meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for 12V and 24V automotive power networks. Its 175°C maximum junction temperature and robust glass-passivated junction further support under-hood and body-control module deployments where thermal and electrical stress are severe.
What is the maximum steady-state power dissipation for the SMDJ64CA at room temperature?
The SMDJ64CA has a steady-state power dissipation (PD) rating of 6.5 W at TA = 25°C. This value reflects continuous DC or low-frequency power handling capability - distinct from its 3000W peak pulse rating - and must be considered alongside PCB copper area and ambient conditions to avoid thermal runaway during sustained overvoltage conditions.
How does the SMDJ64CA's moisture sensitivity level impact manufacturing?
The SMDJ64CA is rated at Moisture Sensitivity Level 1 (MSL-1) per J-STD-020, meaning it has unlimited floor life and requires no dry-packaging or baking prior to reflow soldering. This eliminates process steps and cost in SMT lines, supporting high-yield, high-throughput assembly without moisture-related popcorning or delamination risks.
SMDJ64CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ64CA FAQ
1.How can I place an order for SMDJ64CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ64CA 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 SMDJ64CA reliable?
The price and inventory of SMDJ64CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ64CA is usually 5 days.
3.What payment methods are accepted for SMDJ64CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ64CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ64CA?
SMDJ64CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ64CA 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 SMDJ64CA?
For technical support, including SMDJ64CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ64CA requirements.
6.How does Aetrix verify that SMDJ64CA is sourced from the original manufacturer or authorized distributors?
All SMDJ64CA 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 SMDJ64CA meets industry standards.
7.What is the process for return or replacement of SMDJ64CA?
All SMDJ64CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ64CA, 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 SMDJ64CA part is unused and in its original packaging.
Return procedure for SMDJ64CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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