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Taiwan Semiconductor Corporation SMCJ8.0C
- Part No.:
- SMCJ8.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0C.pdf
- Description:
- 1500W, 9.9V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,655
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Product details
Overview
SMCJ8.0C 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), 9.44–10.9V breakdown voltage (VBR), and 15.0V maximum clamping voltage (VC) at 50A peak impulse current - designed for ESD and electrical fast transient protection in automotive lighting and industrial control interfaces.
For engineers reviewing the SMCJ8.0C datasheet, SMCJ8.0C pinout, SMCJ8.0C application, or SMCJ8.0C equivalent, this part delivers verified ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1.0ps response time, <1µA reverse leakage above 10V, and bidirectional clamping capability without polarity sensitivity - critical for robust front-end surge immunity in 12V automotive subsystems.
Technical Context
The SMCJ8.0C implements a glass-passivated silicon avalanche junction optimized for unidirectional or bidirectional transient suppression. Its 1500W peak pulse power rating (tp = 1ms) and 10°C/W junction-to-case thermal resistance support high-energy surge handling in compact SMC packages.
Designed for bidirectional operation (denoted by "C" suffix), it exhibits symmetrical VBR min/max (9.44V / 10.9V), identical VC (15.0V) and IPPM (50A) in both directions, and meets JESD201 Class 2 whisker resistance - enabling direct replacement of unidirectional variants where polarity-agnostic protection is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping initiates; sets system-level overvoltage trip threshold for 12V rail protection. |
| VBR @ IT=1mA | 9.44–10.9 V - Avalanche breakdown range at 1mA test current; defines minimum clamping onset point under transient stress. |
| VC @ IPPM=50A | 15.0 V - Clamped voltage during 10/1000µs surge; ensures downstream ICs see ≤15V during 50A transients. |
| PPK | 1500 W - Peak pulse power dissipation (1ms); supports high-energy ISO 7637-2 Pulse 5a/b surges without failure. |
| IR @ VWM | <1 µA - Reverse leakage at 8.0V; negligible standby power loss and no signal integrity impact in high-impedance sensing paths. |
| TJ max | +150 °C - Maximum junction temperature; enables reliable operation in under-hood automotive environments. |
Pinout & Package
DO-214AB (SMC) surface-mount package: molded epoxy case meeting UL 94V-0, matte tin-plated leads, 0.210g weight, polarity indicated by cathode band (omitted in bidirectional C-type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | No polarity marking required; either terminal accepts positive or negative transients - simplifies PCB layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) - enables single-device compliance in automotive ECUs. |
| Sub-1.0ps response time | Clamps within <1.0ps from 0V to VBR min - faster than most microcontroller I/O protection circuits, preventing latch-up before logic thresholds are exceeded. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly lines without special handling. |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - satisfies environmental compliance for global automotive and industrial shipments. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and CAN transceivers from load-dump transients in headlamp modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed at connector interface to absorb ±100V/100ms pulses per ISO 7637-2 Pulse 5a. Use Value: Limits voltage seen by downstream drivers to ≤15.0V, preventing gate oxide rupture in MOSFETs and latch-up in transceivers. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers against EFT bursts. IC Role / Device Role / Timing Role: Front-end transient suppressor on field-side signal lines, rated for IEC 61000-4-4 Level 4 (4kV) EFT immunity. Use Value: Maintains signal integrity during 5kHz burst trains by clamping each 5ns edge to ≤15.0V without adding capacitance-induced delay. |
| USB-C Port ESD Protection | DC Motor Drive Feedback Circuits |
Use Scenario: Secondary-level ESD protection for USB-C CC and VCONN lines in automotive infotainment hubs. IC Role / Device Role / Timing Role: Bidirectional clamping device placed after primary common-mode choke to handle ±15kV contact discharge (IEC 61000-4-2). Use Value: Sub-1.0ps response ensures clamping occurs before ESD pulse couples into PHY, avoiding data corruption or port reset. | Use Scenario: Protecting hall-effect sensor inputs and encoder feedback lines in BLDC motor drives subjected to inductive kickback. IC Role / Device Role / Timing Role: Transient suppressor across differential analog feedback pairs to prevent saturation of op-amps during commutation spikes. Use Value: Symmetrical 15.0V clamping preserves signal swing integrity while limiting fault energy to safe levels for precision ADC front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0C | Same VWM/VBR/VC specs but 600W PPK rating and SMB package (smaller footprint, higher thermal resistance). | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for ISO 7637-2 Pulse 5a/b. | Select SMBJ8.0C only when board space is constrained and surge energy is ≤600W. |
| 1.5KE8.0C | Through-hole TO-204AA (DO-41) package; identical 8.0V VWM and 15.0V VC, but 1500W rating applies at 1.0ms (same as SMCJ8.0C). | Requires through-hole assembly; not compatible with automated SMT lines; higher thermal mass slows response slightly. | Choose 1.5KE8.0C only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ8.0C and 1.5KE8.0C, the SMCJ8.0C uniquely combines 1500W surge capacity, SMT-compatible DO-214AB packaging, and verified ISO 7637-2 compliance - making it the only option that satisfies automotive-grade transient immunity requirements in surface-mount production.
Availability
SMCJ8.0C is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, USB-C port ESD protection, and DC motor drive feedback circuits requiring stable component supply and full ISO 7637-2 qualification.
Supply support for SMCJ8.0C 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMCJ series was developed specifically for high-reliability transient suppression in harsh automotive environments, emphasizing ISO 7637-2 compliance, low clamping voltage, and SMT manufacturability.
FAQ
What does the "C" suffix mean in SMCJ8.0C?
The "C" suffix in SMCJ8.0C denotes bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMCJ8.0), the SMCJ8.0C has no cathode marking and functions identically in either orientation, making it ideal for AC-coupled or polarity-agnostic signal lines. This is confirmed in the datasheet's "Devices for bipolar applications" section and validated by identical VBR, VC, and IPPM values in both directions.
Is SMCJ8.0C compliant with ISO 7637-2?
Yes, the SMCJ8.0C is explicitly rated to meet ISO 7637-2 for Pulses 1, 2a, 2b, 3a, and 3b - as stated in the "FEATURES" section of the official Taiwan Semiconductor datasheet (Version S2104). Its 1500W peak pulse power rating, 15.0V clamping voltage at 50A, and sub-1.0ps response time collectively ensure compliance with the voltage and energy limits defined in those test pulses for 12V automotive systems.
What is the maximum clamping voltage of SMCJ8.0C and at what current is it specified?
The maximum clamping voltage (VC) of the SMCJ8.0C is 15.0 V, measured at a peak impulse current (IPPM) of 50 A with a 10/1000 µs waveform (per Fig.5 in the datasheet). This value is guaranteed across the full operating temperature range and represents the highest voltage the device allows to pass through during a standardized surge event - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.
Can SMCJ8.0C replace SMCJ8.0 in an existing design?
Yes, the SMCJ8.0C can replace the unidirectional SMCJ8.0 in most cases, but only if bidirectional protection is required or acceptable. The SMCJ8.0C has identical VWM (8.0 V), VBR (9.44–10.9 V), VC (15.0 V), and PPK (1500 W), but lacks polarity marking and clamps symmetrically. If the original design relies on directional blocking (e.g., DC bias paths), verification of circuit behavior under reverse conduction is necessary before substitution.
What is the thermal resistance of SMCJ8.0C and how does it affect PCB layout?
The SMCJ8.0C has a junction-to-case thermal resistance (RθJC) of 10 °C/W and junction-to-ambient (RθJA) of 55 °C/W (as specified in the THERMAL PERFORMANCE table). To maintain TJ ≤ 150 °C during repeated surges, PCB copper area must be sufficient to dissipate heat - typically ≥ 100 mm² of 2 oz copper connected to both terminals. Insufficient copper increases effective RθJA, risking thermal runaway during high-duty-cycle transients.
SMCJ8.0C 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:
- 15V
- Current - Peak Pulse (10/1000µs):
- 105A
- 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)
SMCJ8.0C FAQ
1.How can I place an order for SMCJ8.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0C 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 SMCJ8.0C reliable?
The price and inventory of SMCJ8.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0C is usually 5 days.
3.What payment methods are accepted for SMCJ8.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0C?
SMCJ8.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0C 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 SMCJ8.0C?
For technical support, including SMCJ8.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0C requirements.
6.How does Aetrix verify that SMCJ8.0C is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0C 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 SMCJ8.0C meets industry standards.
7.What is the process for return or replacement of SMCJ8.0C?
All SMCJ8.0C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0C, 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 SMCJ8.0C part is unused and in its original packaging.
Return procedure for SMCJ8.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0C Tags
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