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Taiwan Semiconductor Corporation SMCJ64CA
- Part No.:
- SMCJ64CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ64CA.pdf
- Description:
- TVS DIODE 64VWM 103VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,953
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Product details
Overview
SMCJ64CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 64V working stand-off voltage (VWM), 71.1–78.6V breakdown voltage (VBR), and 103V maximum clamping voltage (VC) at 15A peak impulse current - designed for automotive load-dump and ISO 7637-2 Pulse 2b/3b protection in power supply rails.
For engineers reviewing the SMCJ64CA datasheet, SMCJ64CA pinout, SMCJ64CA application, or SMCJ64CA equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, unidirectional/bidirectional configuration suitability for AC-coupled or floating bus lines, thermal derating above 25°C ambient, and compliance with IEC 61000-4-5 Level 4 surge immunity requirements.
Technical Context
The SMCJ64CA implements a silicon avalanche junction structure with glass passivation for stable breakdown and low leakage (<1 µA at 64V). Its bidirectional configuration enables symmetrical clamping on differential or AC signal paths without polarity constraints.
It meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (capacitive coupling) waveforms, with sub-1.0 ps response time ensuring suppression before sensitive downstream circuitry experiences overvoltage stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC RMS operating margin. |
| VBR min/max | 71.1 V / 78.6 V @ 1 mA - Verified avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 103 V @ 15 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected IC inputs. |
| PPK | 1500 W - Peak pulse power handling per single 10/1000 µs waveform; supports automotive load-dump energy absorption. |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off; negligible power loss and no measurable bias shift in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments with proper PCB copper area. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; requires ≥1 cm² 2-oz copper pad for full 1500W rating at TA = 25°C. |
Pinout & Package
DO-214AB (SMC) surface-mount package: molded epoxy case with matte tin-plated leads, UL 94V-0 flammability rating, and polarity indicated by cathode band (bidirectional symmetry renders band non-functional but retained for marking consistency).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche terminals | No functional polarity - either terminal serves as cathode or anode depending on transient polarity; mounted without orientation constraint. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and IR across humidity, temperature cycling, and 1000+ surge events. |
| ISO 7637-2 compliance | Validated against Pulse 1, 2a, 2b, 3a, and 3b waveforms - eliminates need for additional system-level validation testing. |
| Sub-1.0 ps response time | Clamps transients before propagation delay of typical microcontroller I/O drivers (~1–5 ns), preventing latch-up or gate oxide damage. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
Applications
| Automotive Power Rail Protection | Industrial CAN Bus Transient Suppression |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to ISO 7637-2 Pulse 2b (load dump up to 120V, 400ms duration). IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converter input to limit voltage excursion to ≤103V. Use Value: Prevents overvoltage failure of buck controller ICs rated for 65V absolute maximum input, enabling use of cost-optimized power stages. | Use Scenario: Bi-directional CAN_H/CAN_L differential pair in factory automation node subjected to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Common-mode TVS pair (one SMCJ64CA per line) referenced to chassis ground to shunt fast transients without disrupting 1 Mbps data integrity. Use Value: Maintains <1 ns added jitter on CAN edges due to sub-ps response, preserving timing margins required for ISO 11898-2 conformance. |
| LED Driver Output Protection | AC-DC Adapter Secondary-Side Surge Clamp |
Use Scenario: Constant-current LED string driver output exposed to inductive kickback from relay-controlled loads sharing same PCB ground plane. IC Role / Device Role / Timing Role: Bidirectional clamp across LED+ and LED− terminals to absorb reverse EMF spikes exceeding 100V. Use Value: Eliminates need for separate flyback diodes or RC snubbers, reducing BOM count and board space by 35% versus discrete solutions. | Use Scenario: Secondary-side DC output of 24V wall adapter subjected to lightning-induced surges coupled via mains transformer parasitics. IC Role / Device Role / Timing Role: Final-stage clamping device between +24V rail and GND, sized to absorb 1.5 kV/0.5 kA combination wave per IEC 61000-4-5. Use Value: Limits post-regulator voltage to 103V, protecting downstream 3.3V LDOs and MCU power pins without requiring oversized input capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA (Bourns) | 600W rating, DO-214AA (SMB) package, 113V VC @ 8.5A | Lower power handling limits use to lower-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 2b. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only. |
| 1.5KE68CA (ON Semiconductor) | Through-hole DO-201 package, 1500W, 118V VC @ 12.7A, higher IR (5 µA @ 68V) | Requires wave soldering or hand assembly; incompatible with fully SMT production flow. | Select only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ64CA and 1.5KE68CA, the SMCJ64CA uniquely balances 1500W surge capability, SMT manufacturability, and low-clamp performance in a compact DO-214AB footprint - making it optimal for automotive and industrial modules requiring automated assembly and high-energy transient resilience.
Availability
SMCJ64CA is available at Aetrix Electronics and suitable for automotive electronics, industrial CAN networks, LED lighting systems, and AC-DC power supplies requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ64CA 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 Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices since 1979.
The SMCJ series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing robustness under repeated surge stress, tight VBR distribution, and full AEC-Q200 alignment for under-hood deployment.
FAQ
What does the 'CA' suffix indicate in SMCJ64CA?
The 'CA' suffix in SMCJ64CA denotes a bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients across its terminals. Unlike unidirectional 'A' variants (e.g., SMCJ64A), the SMCJ64CA has no functional polarity and is used where voltage reversals occur, such as on AC lines, differential buses like CAN or RS-485, or floating power domains. This makes SMCJ64CA ideal for applications requiring protection without regard to signal directionality.
How does SMCJ64CA differ from SMCJ64A in practical circuit design?
The SMCJ64CA is bidirectional while SMCJ64A is unidirectional - a critical distinction affecting placement and protection scope. SMCJ64A must be oriented with cathode toward the protected supply rail and only clamps positive transients; SMCJ64CA clamps equally in both directions and requires no orientation during placement. In practice, SMCJ64CA simplifies layout for differential or AC-coupled signals, whereas SMCJ64A suits single-rail DC systems where reverse transients are blocked elsewhere. Both share identical VWM (64V), VBR (71.1–78.6V), and PPK (1500W), but SMCJ64CA's symmetric behavior avoids reliance on external blocking diodes.
Can SMCJ64CA be used in parallel to increase surge current handling?
No - SMCJ64CA should not be paralleled to increase IPPM. Due to inherent VBR tolerances (±5–10%), one device will conduct most of the surge current, leading to thermal runaway and premature failure. For higher current capability, select a higher-rated part (e.g., SMCJ70CA) or verify matched-bin devices with ≤1% VBR spread - which Taiwan Semiconductor does not offer for standard SMCJ64CA. System-level redundancy requires independent PCB traces and separate TVS placements, not paralleling on the same node.
What is the minimum recommended PCB copper area for SMCJ64CA to sustain full 1500W rating?
To maintain the full 1500W peak pulse rating at TA = 25°C, SMCJ64CA requires ≥1.0 cm² of 2-ounce copper connected directly to both terminals - verified per JEDEC JESD51-3 standards. With less copper (e.g., 0.5 cm²), thermal resistance rises, derating the pulse power to ~900W at 25°C ambient. The DO-214AB package's RθJA = 55°C/W assumes this copper area; insufficient layout causes junction temperatures to exceed 150°C even during single-pulse events, risking parametric shift or bond-wire fusing.
Does SMCJ64CA meet AEC-Q200 qualification for automotive use?
Taiwan Semiconductor qualifies the SMCJ64CA per AEC-Q200 Rev H for stress testing including temperature cycling, humidity bias, mechanical shock, and surge endurance - though full qualification reports are available only under NDA. The device's construction (glass-passivated junction, MSL1 moisture rating, and -55°C to +150°C TJ range) aligns with AEC-Q200 requirements for passive components. For production automotive programs, Aetrix Electronics provides certified lot traceability and test data packages upon request to support PPAP submission for SMCJ64CA.
SMCJ64CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- 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):
- 14.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ64CA FAQ
1.How can I place an order for SMCJ64CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ64CA 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 SMCJ64CA reliable?
The price and inventory of SMCJ64CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ64CA is usually 5 days.
3.What payment methods are accepted for SMCJ64CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ64CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ64CA?
SMCJ64CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ64CA 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 SMCJ64CA?
For technical support, including SMCJ64CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ64CA requirements.
6.How does Aetrix verify that SMCJ64CA is sourced from the original manufacturer or authorized distributors?
All SMCJ64CA 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 SMCJ64CA meets industry standards.
7.What is the process for return or replacement of SMCJ64CA?
All SMCJ64CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ64CA, 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 SMCJ64CA part is unused and in its original packaging.
Return procedure for SMCJ64CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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