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Taiwan Semiconductor Corporation SMCJ7.0C
- Part No.:
- SMCJ7.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0C.pdf
- Description:
- 1500W, 8.6V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,559
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Product details
Overview
SMCJ7.0C from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 7.0V working stand-off voltage (VWM), 7.78–9.51V breakdown voltage (VBR), and 13.3V maximum clamping voltage (VC) at 200A peak pulse current-designed for ESD and lightning surge protection in automotive power line interfaces.
For engineers reviewing the SMCJ7.0C datasheet, SMCJ7.0C pinout, SMCJ7.0C application, or SMCJ7.0C equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA reverse leakage above 10V, and DO-214AB thermal performance (RθJA = 55°C/W).
Technical Context
The SMCJ7.0C implements a glass-passivated silicon junction optimized for fast transient suppression in both polarities, meeting ISO 7637-2 immunity requirements for automotive 12V systems. Its unidirectional counterpart (SMCJ7.0) has VF = 3.5V at 100A; the 'C' suffix denotes bidirectional configuration with symmetrical VBR and VC in forward and reverse directions.
Thermal design relies on low RθJC = 10°C/W and RθJA = 55°C/W, enabling 5W steady-state dissipation at 25°C ambient. The device operates across –55°C to +150°C junction temperature range and supports 200A 8.3ms half-sine surge current without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 7.78 V / 9.51 V @ IT = 7 mA - Ensures reliable turn-on margin above VWM under production variation |
| VC @ IPPM | 13.3 V @ 200 A - Clamped voltage during 10/1000μs surge limits downstream IC stress |
| PPK | 1500 W - Peak pulse power handling per single 1ms transient per Fig.5 waveform |
| IR @ VWM | <1 μA - Negligible leakage current preserves battery life in always-on automotive modules |
| TJ max | +150 °C - Enables placement near high-power components in engine control units |
Pinout & Package
DO-214AB (SMC) surface-mount package: molded epoxy case rated UL 94V-0, matte tin-plated leads, polarity indicated by cathode band (not applicable for bidirectional SMCJ7.0C; terminals are symmetric).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode | Bidirectional transient path | Both terminals function identically-no polarity marking required; connects across protected line and ground |
| Case | Non-electrical mechanical interface | DO-214AB body provides thermal conduction path to PCB copper; no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) for automotive ECUs |
| Sub-1ps response time | Clamps within <1.0 ps from 0 V to VBR min-faster than most microcontroller I/O protection circuits |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow-compatible with standard SMT assembly lines |
| Halogen-free construction | Meets IEC 61249-2-21-supports RoHS-compliant and environmentally regulated automotive supply chains |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery feed to body control module exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between power rail and ground, absorbing >1500W transients before downstream LDOs or MCUs see overvoltage. Use Value: Limits rail voltage to ≤13.3V during 200A surge, preventing latch-up or gate oxide damage in 5V/3.3V logic. | Use Scenario: RS-485 transceiver bus lines in factory automation PLCs subjected to EFT bursts. IC Role / Device Role / Timing Role: Bidirectional TVS shunting differential-mode transients between A/B lines and common reference. Use Value: Symmetrical clamping ensures equal protection regardless of signal polarity-critical for full-duplex communication integrity. |
| LED Lighting Driver Protection | Consumer USB Port ESD Hardening |
Use Scenario: Constant-current LED driver input in streetlight fixture encountering lightning-induced surges on AC mains. IC Role / Device Role / Timing Role: Front-end surge absorber parallel to bridge rectifier output, clamping 10/1000μs transients before bulk capacitor. Use Value: 1500W rating handles multi-kV induced surges; DO-214AB footprint allows compact layout near entry point. | Use Scenario: VBUS line in USB 2.0 host port exposed to ±8kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance (<100pF typical) bidirectional clamp between VBUS and GND, minimizing signal distortion. Use Value: Sub-1ps response ensures clamping before ESD pulse edge reaches USB PHY-prevents data corruption or port reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CA (Bourns) | Same DO-214AA (SMB) package, 600W PPK rating, 13.3V VC @ 100A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 (load dump) | Select only when board space constraints require SMB footprint and surge energy is ≤600W |
| P6SMB7.0CA (ON Semiconductor) | DO-214AA (SMB) package, 600W PPK, 13.3V VC @ 100A, higher IR (≤5μA) | Higher leakage may affect ultra-low-power sleep modes in battery-backed systems | Prefer for cost-sensitive consumer designs where ISO 7637-2 compliance is not required |
Compared with SMCJ7.0C, both alternatives offer identical clamping voltage but halve peak power handling and use smaller SMB packages-reducing thermal mass and derating margin in automotive environments where 1500W surge immunity is mandatory.
Availability
SMCJ7.0C is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, LED lighting drivers, and consumer USB port protection requiring stable component supply across extended temperature ranges and high-reliability surge events.
Supply support for SMCJ7.0C 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs since 1979.
The SMCJ series was designed specifically for automotive-grade transient suppression-emphasizing ISO 7637-2 compliance, high PPK density in DO-214AB, and robustness across –55°C to +150°C operation.
FAQ
What does the 'C' suffix indicate in SMCJ7.0C?
The 'C' suffix in SMCJ7.0C denotes bidirectional configuration-meaning the device provides symmetrical transient suppression in both forward and reverse directions, unlike unidirectional variants (e.g., SMCJ7.0). This eliminates polarity concerns during PCB layout and enables use across differential lines or AC-coupled rails. The SMCJ7.0C achieves this via dual-junction construction, maintaining identical VBR, VC, and IR specs in either orientation.
Does SMCJ7.0C meet ISO 7637-2 for automotive applications?
Yes, SMCJ7.0C meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) requirements. Its 1500W peak pulse power, 13.3V clamping voltage at 200A, and sub-1ps response time ensure robust immunity in 12V vehicle electrical systems. Taiwan Semiconductor's official documentation explicitly lists ISO 7637-2 compliance for the full SMCJ5.0–SMCJ170(A) family, including SMCJ7.0C.
What is the maximum clamping voltage of SMCJ7.0C and at what current?
The maximum clamping voltage (VC) of SMCJ7.0C is 13.3 V, measured at 200 A peak pulse current (IPPM) under the standardized 10/1000μs waveform defined in Fig.5 of the datasheet. This value represents worst-case voltage seen by downstream circuitry during a full-energy surge event and is guaranteed across manufacturing lot variation and temperature extremes (–55°C to +150°C).
Can SMCJ7.0C replace SMCJ7.0 in an existing design?
No-SMCJ7.0C cannot directly replace unidirectional SMCJ7.0 without layout review. While both share identical VWM (7.0V), VBR (7.78–9.51V), and VC (13.3V), the SMCJ7.0C lacks a cathode band and functions bidirectionally, whereas SMCJ7.0 requires correct polarity orientation. Replacing SMCJ7.0 with SMCJ7.0C may cause unintended conduction in DC-biased circuits; verify system-level polarity requirements before substitution.
What is the thermal resistance of SMCJ7.0C and how does it impact PCB layout?
SMCJ7.0C has RθJA = 55°C/W (junction-to-ambient) and RθJC = 10°C/W (junction-to-case). To maintain TJ ≤ 150°C under 1500W transient conditions, PCB layout must maximize copper area connected to both terminals-minimum 100 mm² per pad recommended. Thermal vias under the SMC pad improve heat spreading; insufficient copper causes localized overheating and premature failure during repetitive surges.
SMCJ7.0C 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 118A
- 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)
SMCJ7.0C FAQ
1.How can I place an order for SMCJ7.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0C 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 SMCJ7.0C reliable?
The price and inventory of SMCJ7.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.0C is usually 5 days.
3.What payment methods are accepted for SMCJ7.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0C?
SMCJ7.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0C 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 SMCJ7.0C?
For technical support, including SMCJ7.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0C requirements.
6.How does Aetrix verify that SMCJ7.0C is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0C 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 SMCJ7.0C meets industry standards.
7.What is the process for return or replacement of SMCJ7.0C?
All SMCJ7.0C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0C, 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 SMCJ7.0C part is unused and in its original packaging.
Return procedure for SMCJ7.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.0C Tags
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