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Taiwan Semiconductor Corporation SMCJ8.0CA
- Part No.:
- SMCJ8.0CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0CA.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,270
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Product details
Overview
SMCJ8.0CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 8.0V working stand-off voltage (VWM), 8.89–9.83V breakdown voltage (VBR), and 13.6V maximum clamping voltage (VC) at 50A peak pulse current - designed for automotive ECU power rail and CAN bus line protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ8.0CA datasheet, SMCJ8.0CA pinout, SMCJ8.0CA application, or SMCJ8.0CA equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal resistance (RθJC = 10°C/W), moisture sensitivity level (MSL 1), and direct alternatives for ESD and load-dump surge protection in industrial and automotive systems.
Technical Context
The SMCJ8.0CA uses a glass-passivated silicon junction to achieve sub-1.0ps response time from 0 V to VBR min and maintains <1 µA reverse leakage above 10 V. Its bidirectional configuration enables symmetrical clamping in both polarities without external circuitry.
Rated for 1500 W peak pulse power (tp = 1 ms, 10/1000 µs waveform), it operates across –55°C to +150°C junction temperature and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards in its molded DO-214AB case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system overvoltage immunity threshold |
| VBR @ IT = 1 mA | 8.89–9.83 V - Breakdown voltage range confirming reliable turn-on margin above VWM; ensures consistent transient suppression onset |
| VC @ IPPM = 50 A | 13.6 V - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on protected downstream ICs |
| PPK | 1500 W - Peak pulse power handling per single 1 ms event; supports high-energy automotive load dump events |
| RθJC | 10 °C/W - Junction-to-case thermal resistance; enables effective heat transfer to PCB copper pour or heatsink under sustained surge duty |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; guarantees negligible standby power loss and signal integrity in high-impedance circuits |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional device with cathode band omitted (symmetrical terminals); matte tin-plated leads, MSL Level 1, weight ≈0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking required; identical clamping behavior in either direction - simplifies layout and eliminates orientation errors |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling) - meets automotive OEM requirements out-of-box |
| Sub-1.0 ps response time | Ensures clamping activation before transient energy couples into sensitive analog or communication circuitry - critical for CAN FD and LIN bus protection |
| Glass passivated junction | Provides stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure - suitable for under-hood applications |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling mandates |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: 12 V battery-fed ECU power input subjected to load dump (up to 40 V, 400 ms) and jump-start surges. IC Role / Device Role / Timing Role: Primary shunt TVS placed upstream of DC-DC converter input to clamp transients before they reach regulation stage. Use Value: 13.6 V clamping at 50 A limits downstream voltage stress to safe levels for 16 V-rated input capacitors and controller ICs. |
Use Scenario: High-speed CAN FD node exposed to EFT bursts and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: Bidirectional TVS connected across CANH–CANL to absorb common-mode transients without disrupting differential signaling. Use Value: Symmetrical 13.6 V clamping preserves signal integrity while meeting ISO 11898-2 EMC immunity requirements. |
| Industrial PLC I/O Protection | LED Driver Surge Immunity |
Use Scenario: 24 V digital input module receiving signals from field sensors subject to inductive kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Standoff TVS on each input channel to prevent latch-up or gate oxide damage in optocoupler or Schmitt trigger inputs. Use Value: 8.0 V VWM allows clean detection of 10–24 V logic-high signals while rejecting sub-10 V noise. |
Use Scenario: Constant-current LED driver board mounted in outdoor signage, exposed to AC line surges and electrostatic discharge. IC Role / Device Role / Timing Role: Bidirectional TVS across output terminals to protect MOSFET switches and current-sense resistors from reverse-polarity connection and surge events. Use Value: 1500 W peak power rating handles repetitive 1 kV/0.5 J surges per IEC 61000-4-5 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA (Bourns) | Same VWM/VBR/VC specs but lower PPK = 600 W; DO-214AA (SMB) package with higher RθJA = 85°C/W | Limited to lower-energy transients (e.g., ESD only); unsuitable for automotive load dump | Select when space-constrained layouts require smaller footprint and surge energy is ≤600 W |
| 1.5KE8.0CA (ON Semiconductor) | Through-hole TO-204AA (DO-41); same VWM/VBR/VC, PPK = 1500 W, but slower response (~1 ns) and no ISO 7637-2 validation | Requires manual assembly; lacks automotive qualification documentation and MSL 1 rating | Select for legacy through-hole designs where reflow compatibility and moisture sensitivity are not concerns |
Compared with SMBJ8.0CA and 1.5KE8.0CA, the SMCJ8.0CA uniquely combines 1500 W surge capability, DO-214AB's superior thermal performance (RθJC = 10°C/W), automated placement readiness, and explicit ISO 7637-2 compliance - making it the preferred choice for new automotive and industrial SMT designs requiring robust, qualified transient protection.
Availability
SMCJ8.0CA is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, CAN FD network nodes, and outdoor LED driver systems requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ8.0CA 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, and power MOSFETs for automotive and industrial markets.
The SMCJ series was developed specifically for high-reliability, high-power transient suppression in harsh environments - emphasizing ISO 7637-2 compliance, MSL 1 robustness, and glass-passivated junction stability across extended temperature ranges.
FAQ
What is the clamping voltage of SMCJ8.0CA at its rated peak pulse current?
The SMCJ8.0CA has a maximum clamping voltage (VC) of 13.6 V when subjected to a 50 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during a standardized surge event. The SMCJ8.0CA maintains this clamping performance consistently across its operational temperature range.
Is SMCJ8.0CA unidirectional or bidirectional, and how does that affect its use?
The "CA" suffix in SMCJ8.0CA explicitly denotes a bidirectional configuration, meaning it provides symmetrical transient suppression in both polarities without requiring external polarity alignment. Unlike unidirectional variants (e.g., SMCJ8.0A), the SMCJ8.0CA has no cathode band and can be placed across any two points needing balanced overvoltage protection - such as CANH–CANL differential pairs or AC-coupled signal lines.
Does SMCJ8.0CA meet automotive transient immunity standards?
Yes, the SMCJ8.0CA is explicitly validated to meet ISO 7637-2 test pulses including Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling). This qualification is documented in Taiwan Semiconductor's official S2104 datasheet and confirms suitability for front-end protection in automotive control units, body electronics, and infotainment systems.
What is the thermal resistance profile of SMCJ8.0CA, and why does it matter?
The SMCJ8.0CA has a junction-to-case thermal resistance (RθJC) of 10°C/W and junction-to-ambient (RθJA) of 55°C/W. These values indicate efficient heat transfer from the silicon die to the PCB pad or heatsink, enabling reliable operation during repeated surge events. Low RθJC is critical for maintaining junction temperature below 150°C during high-duty-cycle transients - a key factor in long-term reliability for automotive and industrial deployments of the SMCJ8.0CA.
Can SMCJ8.0CA replace SMCJ8.0A in an existing design?
No - SMCJ8.0CA and SMCJ8.0A are not interchangeable without circuit review. SMCJ8.0A is unidirectional (cathode-marked) and intended for DC-biased lines like power rails, while SMCJ8.0CA is bidirectional and used across floating or AC-coupled nodes. Substituting one for the other may result in improper clamping or forward conduction failure. Always verify polarity requirements and transient directionality before selecting between SMCJ8.0CA and SMCJ8.0A.
SMCJ8.0CA 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 115A
- 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)
SMCJ8.0CA FAQ
1.How can I place an order for SMCJ8.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0CA 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 SMCJ8.0CA reliable?
The price and inventory of SMCJ8.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0CA is usually 5 days.
3.What payment methods are accepted for SMCJ8.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0CA?
SMCJ8.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0CA 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 SMCJ8.0CA?
For technical support, including SMCJ8.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0CA requirements.
6.How does Aetrix verify that SMCJ8.0CA is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0CA 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 SMCJ8.0CA meets industry standards.
7.What is the process for return or replacement of SMCJ8.0CA?
All SMCJ8.0CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0CA, 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 SMCJ8.0CA part is unused and in its original packaging.
Return procedure for SMCJ8.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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