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Taiwan Semiconductor Corporation SMCJ8V5CA
- Part No.:
- SMCJ8V5CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8V5CA.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,077
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Product details
Overview
SMCJ8V5CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 8.5V working stand-off voltage (VWM), 9.44–10.4V breakdown voltage (VBR), and 14.4V maximum clamping voltage (VC) at 20A peak impulse current - designed for ESD and electrical fast transient protection in automotive lighting and industrial control interfaces.
For engineers reviewing the SMCJ8V5CA datasheet, SMCJ8V5CA pinout, SMCJ8V5CA application, or SMCJ8V5CA equivalent, key selection criteria include bidirectional clamping performance, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1µA reverse leakage above 10V, and DO-214AB thermal resistance (RθJC = 10°C/W).
Technical Context
The SMCJ8V5CA uses a glass-passivated silicon junction optimized for fast transient suppression without degradation under repetitive surge stress. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal lines, eliminating polarity dependency during layout.
It meets ISO 7637-2 immunity requirements for automotive electronics, with specified clamping behavior under 10/1000µs waveform per R.E.A. standard and thermal derating down to 0W at 150°C ambient per Fig.2 - supporting operation in engine bay or power supply rail protection roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC bias margin in protected circuit. |
| VBR min/max | 9.44 V / 10.4 V @ IT = 1 mA - Verified breakdown threshold range ensures consistent turn-on across production lots. |
| VC @ IPPM | 14.4 V @ 20 A - Clamped voltage during 10/1000µs surge; determines maximum overvoltage seen by downstream ICs. |
| PPK | 1500 W - Peak pulse power handling capability per single 1ms transient; supports high-energy EFT and load dump events. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature rating enables use in under-hood automotive environments without thermal shutdown. |
| RθJC | 10 °C/W - Low junction-to-case thermal resistance allows efficient heat transfer to PCB copper pour or heatsink. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional device with cathode band omitted - terminals are non-polarized and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient return path (bidirectional) | Connects to protected line; conducts during positive or negative overvoltage excursions relative to cathode. |
| Cathode (Lead 2) | Transient return path (bidirectional) | Connects to reference plane (e.g., ground or VCC); completes low-impedance surge shunt path in either polarity. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery interruption), and Pulse 3a/3b (switching transients) - enables direct use in automotive ECUs without external filtering. |
| Sub-1 ps response time | Typically <1.0 ps from 0 V to VBR min - faster than most microcontroller I/O protection requirements, preventing latch-up or gate oxide damage. |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement before reflow - compatible with standard SMT assembly without special handling. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - meets environmental compliance for global OEM shipments. |
| UL 94V-0 molding compound | Flame-retardant encapsulation prevents propagation of fire in high-power fault conditions - required for under-hood and industrial power module designs. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and LED driver ICs in headlamp modules subjected to load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector interface to limit transients before they reach sensitive analog front-ends. Use Value: 14.4V clamping at 20A ensures MCU GPIOs and transceiver inputs remain below absolute maximum ratings during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between field wiring and optocoupler input to absorb >1kV EFT noise without false triggering. Use Value: 8.5V VWM provides sufficient margin above 24V nominal while maintaining fast response to sub-100ns transients common in factory-floor EMI. |
| USB-C Power Delivery Interface | Smart Meter Communication Port |
Use Scenario: Protecting CC and VCONN pins in USB-C PD controllers from hot-plug ESD and cable-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS mounted adjacent to connector to shunt ±15kV contact ESD per IEC 61000-4-2 before reaching PD controller's internal ESD structures. Use Value: Sub-1ps response and <1µA leakage preserve signal fidelity on high-speed CC negotiation lines without loading or timing skew. | Use Scenario: Shielding RS-485 transceivers in utility smart meters from lightning-induced surges on long outdoor communication lines. IC Role / Device Role / Timing Role: Primary clamping device on differential bus lines, coordinated with GDT or MOV secondary protection stages. Use Value: 1500W PPK rating sustains multiple 10/1000µs surges up to 20A without parametric shift - critical for field-deployed meter longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA (Bourns) | 600W peak power, SMB package (smaller footprint, higher RθJA = 75°C/W) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump simulation. | Select only when board space is constrained and surge energy remains ≤600W. |
| P6SMB8.5CA (Littelfuse) | 600W rating, identical SMB package, slightly higher VC (15.0V @ 20A) | Same thermal limitations as SMBJ8.5CA; lacks full 1500W validation for automotive-grade testing. | Prefer for cost-sensitive consumer applications where ISO 7637-2 compliance is not required. |
Compared with SMCJ8V5CA, both alternatives offer smaller footprints but sacrifice 60% peak power handling and thermal robustness - making SMCJ8V5CA the only choice for automotive-grade 1500W transient suppression in DO-214AB form factor.
Availability
SMCJ8V5CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and USB-C power delivery interface designs requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ8V5CA 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-energy transient suppression in harsh environments, targeting ISO 7637-2-compliant automotive subsystems and industrial equipment with extended temperature and reliability requirements.
FAQ
What is the clamping voltage of SMCJ8V5CA at its rated peak pulse current?
The SMCJ8V5CA has a maximum clamping voltage (VC) of 14.4 V at 20 A peak impulse current (IPPM), measured under the standardized 10/1000 µs double-exponential waveform. This value ensures protected circuits experience no more than 14.4 V during worst-case transients, preserving IC reliability. The SMCJ8V5CA datasheet specifies this parameter under Note 2 in the Electrical Specifications table.
Is SMCJ8V5CA unidirectional or bidirectional, and how does that affect PCB layout?
The SMCJ8V5CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it clamps symmetrically for both positive and negative transients - no polarity marking or orientation dependency exists. Unlike unidirectional variants (e.g., SMCJ8.5A), the SMCJ8V5CA requires no cathode band alignment during placement, simplifying automated assembly and enabling use in AC-coupled or floating signal paths without risk of reverse-bias failure.
Does SMCJ8V5CA meet automotive transient immunity standards?
Yes, the SMCJ8V5CA meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery interruption), and Pulse 3a/3b (switching transients). Its 1500W peak power rating, fast <1 ps response, and validated clamping behavior under defined waveforms make it suitable for front-end protection in automotive ECUs, body control modules, and lighting drivers - confirmed in TSC's S2104 datasheet, Section "FEATURES".
What is the thermal resistance profile of SMCJ8V5CA, and how does it impact PCB design?
The SMCJ8V5CA has a junction-to-case thermal resistance (RθJC) of 10°C/W and junction-to-ambient (RθJA) of 55°C/W. To maintain TJ ≤ 150°C under 1500W surge conditions, designers must provide adequate copper area (≥200 mm² per lead) and minimize thermal via impedance. The DO-214AB package relies on solder pad conduction rather than airflow, so thermal relief patterns and inner-layer copper pours directly beneath the device are essential for sustained reliability.
Can SMCJ8V5CA be used in place of SMCJ8.5A in a design?
No - SMCJ8V5CA and SMCJ8.5A are functionally distinct: SMCJ8V5CA is bidirectional (CA), while SMCJ8.5A is unidirectional (A). Substituting one for the other risks catastrophic failure if reverse polarity transients occur in a unidirectional layout. The SMCJ8V5CA must only replace other "CA"-suffixed parts; its VWM (8.5 V), VBR (9.44–10.4 V), and VC (14.4 V) match SMCJ8.5CA exactly, not SMCJ8.5A.
SMCJ8V5CA 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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 104.2A
- 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)
SMCJ8V5CA FAQ
1.How can I place an order for SMCJ8V5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8V5CA 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 SMCJ8V5CA reliable?
The price and inventory of SMCJ8V5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8V5CA is usually 5 days.
3.What payment methods are accepted for SMCJ8V5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8V5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8V5CA?
SMCJ8V5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8V5CA 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 SMCJ8V5CA?
For technical support, including SMCJ8V5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8V5CA requirements.
6.How does Aetrix verify that SMCJ8V5CA is sourced from the original manufacturer or authorized distributors?
All SMCJ8V5CA 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 SMCJ8V5CA meets industry standards.
7.What is the process for return or replacement of SMCJ8V5CA?
All SMCJ8V5CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8V5CA, 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 SMCJ8V5CA part is unused and in its original packaging.
Return procedure for SMCJ8V5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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