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Taiwan Semiconductor Corporation SMCJ7.0
- Part No.:
- SMCJ7.0
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.0.pdf
- Description:
- 1500W, 8.6V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMCJ7.0 from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 7.78–9.51 V breakdown voltage (VBR), 7.0 V working stand-off voltage (VWM), and 13.3 V maximum clamping voltage (VC) at 200 A peak pulse current - designed for automotive load-dump and inductive switching surge protection in power supply rails.
For engineers reviewing the SMCJ7.0 datasheet, SMCJ7.0 pinout, SMCJ7.0 application, or SMCJ7.0 equivalent, this page delivers verified electrical parameters, ISO 7637-2 compliance status, thermal resistance values (RθJA = 55 °C/W), moisture sensitivity level (MSL 1), and bidirectional variant compatibility (SMCJ7.0A).
Technical Context
The SMCJ7.0 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (7.78–9.51 V @ 10 mA), clamping transients to ≤13.3 V at 200 A (10/1000 µs waveform). Its glass-passivated junction ensures stable leakage (<1 µA @ 7 V) and fast response (<1.0 ps).
Designed for surface-mount assembly per J-STD-002, it meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements and supports operation across –55 °C to +150 °C junction temperature range, with RθJC = 10 °C/W enabling effective heat transfer to PCB copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 7.78 V / 9.51 V @ 10 mA - Ensures reliable turn-on within defined tolerance band under standardized test conditions |
| VC @ IPPM | 13.3 V @ 200 A - Clamped voltage during worst-case 10/1000 µs surge, limiting downstream IC stress |
| PPK | 1500 W - Peak pulse power handling capability per single non-repetitive event |
| IR @ VWM | <1 µA - Ultra-low leakage preserves system standby power integrity |
| TJ max | +150 °C - Enables use in under-hood automotive environments without derating |
| RθJA | 55 °C/W - Thermal resistance from junction to ambient defines required PCB copper area for thermal management |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; polarity indicated by molded cathode band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side return path in unidirectional configuration |
| Cathode | Reverse-biased surge clamp terminal | Connected to protected line (e.g., 12 V rail); conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and humidity stress |
| ISO 7637-2 compliance | Validated against automotive transient standards Pulse 1 (inductive load dump), 2a/2b (battery disconnect), and 3a/3b (capacitive coupling) |
| Fast response time | <1.0 ps rise time enables clamping before sensitive logic or analog circuitry sustains damage |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking, simplifying SMT production flow |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally constrained applications |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
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: Unidirectional TVS placed between rail and chassis ground to shunt energy before LDO or MCU power pins. Use Value: Clamps transients to 13.3 V, protecting downstream 16 V-rated regulators and ensuring uninterrupted microcontroller operation. | Use Scenario: 24 V DC digital input module exposed to relay coil flyback and field-wiring ESD events. IC Role / Device Role / Timing Role: Primary surge suppression device on signal line entry, upstream of optocoupler or Schmitt trigger input stage. Use Value: Limits voltage excursion to safe levels (<13.3 V) during 200 A 10/1000 µs pulses, preventing latch-up in interface ICs. |
| LED Driver Overvoltage Clamp | DC-DC Converter Input Stage |
Use Scenario: Constant-current LED driver board powered from vehicle battery with no upstream filtering. IC Role / Device Role / Timing Role: Standoff protector across input capacitor to absorb repetitive switching transients from alternator ripple. Use Value: Withstands ≥1000 surges at rated PPK, maintaining VWM = 7.0 V to avoid false triggering during normal 12 V nominal operation. | Use Scenario: 7–12 V input to buck converter supplying FPGA core voltage in embedded control unit. IC Role / Device Role / Timing Role: First-line transient suppressor before input bulk capacitor and controller IC. Use Value: Fast <1 ps response prevents overshoot propagation into controller's enable and feedback pins, avoiding brownout resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0 | 600 W peak power rating, same VWM/VBR range, SMB package (smaller footprint, higher RθJA = 75 °C/W) | Limited to lower-energy transients; unsuitable for full ISO 7637-2 Pulse 1 compliance | Select when space-constrained and surge energy is ≤600 W; verify thermal margin with reduced copper area. |
| SMCJ7.0A | Tighter VBR tolerance (7.78–8.60 V vs. 7.78–9.51 V), identical package and clamping (12.0 V @ 200 A) | Better consistency in multi-unit systems where precise turn-on threshold matters (e.g., parallel TVS arrays) | Prefer for high-reliability designs requiring tighter parametric control; same PCB layout and thermal design. |
Compared with SMBJ7.0, SMCJ7.0 delivers 2.5× higher surge energy handling and certified ISO 7637-2 compliance; versus SMCJ7.0A, it trades tighter VBR tolerance for broader manufacturing yield - both share identical DO-214AB footprint and thermal behavior.
Availability
SMCJ7.0 is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, LED lighting drivers, and DC-DC converter input stages requiring stable component supply and full ISO 7637-2 transient immunity.
Supply support for SMCJ7.0 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, MOSFETs, and power management devices.
The SMCJ series was developed specifically for high-energy automotive and industrial surge protection, emphasizing robustness under ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms and compatibility with automated SMT assembly lines.
FAQ
What is the clamping voltage of SMCJ7.0 at its rated peak pulse current?
The SMCJ7.0 has a maximum clamping voltage (VC) of 13.3 V when subjected to its rated 200 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC/IEC test conditions and guarantees that downstream components see no more than 13.3 V during worst-case transient events. The SMCJ7.0 maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMCJ7.0 compliant with automotive transient immunity standards?
Yes, the SMCJ7.0 is explicitly tested and compliant with ISO 7637-2 for Pulses 1, 2a, 2b, 3a, and 3b - covering key automotive threats including load dump, battery disconnection, and capacitive coupling transients. This compliance is documented in Taiwan Semiconductor's official S2104 datasheet revision and confirmed via characterization curves and application notes. SMCJ7.0 meets these standards in its standard unidirectional configuration.
What is the difference between SMCJ7.0 and SMCJ7.0A?
The SMCJ7.0A features a tighter breakdown voltage tolerance: 7.78–8.60 V versus 7.78–9.51 V for the SMCJ7.0, while maintaining identical package (DO-214AB), clamping voltage (12.0 V @ 200 A), and peak power rating (1500 W). Both parts share the same marking code prefix (GDL/GDM), MSL Level 1 rating, and ISO 7637-2 compliance. The SMCJ7.0A is preferred where precise VBR matching is critical, such as in parallel TVS configurations.
Can SMCJ7.0 be used in bidirectional configurations?
No - the SMCJ7.0 is a unidirectional TVS diode. For bidirectional operation, the SMCJ7.0C or SMCJ7.0CA variants must be used; these include internal back-to-back diode structures and are marked with "C" or "CA" suffixes. Using SMCJ7.0 in reverse-biased AC or bipolar signal paths will result in forward conduction and potential failure. Always verify part suffix and marking code (GDL for SMCJ7.0) before placement.
What is the thermal resistance and maximum junction temperature of SMCJ7.0?
The SMCJ7.0 has a junction-to-ambient thermal resistance (RθJA) of 55 °C/W and a maximum junction temperature (TJ) rating of +150 °C. These values assume standard JEDEC 2-layer PCB mounting with 1 in² (6.45 cm²) of 2 oz copper on both sides. Exceeding TJ = 150 °C risks permanent degradation of VBR and increased leakage; thermal design must account for ambient temperature, power dissipation duty cycle, and copper area per Taiwan Semiconductor's Fig.2 derating curve.
SMCJ7.0 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ7.0 FAQ
1.How can I place an order for SMCJ7.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.0 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 SMCJ7.0 reliable?
The price and inventory of SMCJ7.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.0 is usually 5 days.
3.What payment methods are accepted for SMCJ7.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.0?
SMCJ7.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.0 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 SMCJ7.0?
For technical support, including SMCJ7.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.0 requirements.
6.How does Aetrix verify that SMCJ7.0 is sourced from the original manufacturer or authorized distributors?
All SMCJ7.0 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 SMCJ7.0 meets industry standards.
7.What is the process for return or replacement of SMCJ7.0?
All SMCJ7.0 units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.0, 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 SMCJ7.0 part is unused and in its original packaging.
Return procedure for SMCJ7.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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