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Taiwan Semiconductor Corporation SMCJ8.0
- Part No.:
- SMCJ8.0
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0.pdf
- Description:
- 1500W, 9.9V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMCJ8.0 from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 8.0V working stand-off voltage (VWM), 8.89–10.9V breakdown voltage (VBR), and 15.0V maximum clamping voltage (VC) at 50A peak pulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ8.0 datasheet, SMCJ8.0 pinout, SMCJ8.0 application, or SMCJ8.0 equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction-to-ambient thermal resistance (55°C/W), moisture sensitivity level (MSL 1), and unidirectional polarity marking for correct PCB orientation.
Technical Context
The SMCJ8.0 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (8.89–10.9V at 1mA test current), clamping transients to ≤15.0V at 50A IPPM. Its glass-passivated junction ensures stable breakdown and low leakage (<1μA above 10V).
Thermally rated for TJ = –55°C to +150°C, it delivers 1500W peak pulse power (tp = 1ms) with junction-to-case thermal resistance of 10°C/W and meets JESD201 Class 2 whisker resistance. Polarity is marked by cathode band per DO-214AB mechanical outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before conduction begins; sets minimum system rail margin for safe operation. |
| VBR min/max | 8.89 V / 10.9 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering across process variation and temperature. |
| VC @ IPPM | 15.0 V @ 50 A - Clamped voltage during worst-case 1ms transient; defines maximum stress on downstream ICs. |
| PPK | 1500 W - Peak pulse power handling per IEC 61000-4-5 and ISO 7637-2; supports high-energy automotive surge events. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage; negligible power loss and signal integrity impact in standby. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with derated power above 25°C. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; determines required PCB copper area and airflow for thermal management. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-diode configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, MSL Level 1, weight ≈0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge (IFSM = 200 A, VF = 3.5 V @ 100 A). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V rail); initiates avalanche conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) - enables drop-in protection in automotive ECUs. |
| Fast response time | <1.0 ps from 0 V to VBR min - limits voltage overshoot before clamping engages, critical for protecting fast-switching MOSFET gates. |
| Glass passivated junction | Stable VBR tolerance and low IR drift over temperature and lifetime - ensures consistent clamping behavior across 15-year automotive service life. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - meets environmental requirements for global OEM production and end-of-life recycling. |
| Automated placement ready | DO-214AB footprint compatible with standard SMT pick-and-place equipment; no special tooling or reflow profile adjustments needed. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: 12V battery rail in engine control units exposed to load-dump pulses up to 35V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage to clamp transients before they reach sensitive regulators. Use Value: Limits voltage seen by upstream LDOs and microcontrollers to ≤15.0V, preventing latch-up or permanent damage during cold-crank or alternator regulation faults. |
Use Scenario: Digital input module in programmable logic controller subjected to EFT bursts (IEC 61000-4-4) and inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24V sensor input lines, mounted adjacent to connector entry point. Use Value: Absorbs 1500W surges without degradation, maintaining <1μA leakage to preserve analog input accuracy and reduce false-trigger risk in safety-critical monitoring. |
| LED Driver Overvoltage Clamp | USB-C Power Delivery Line Protection |
|
Use Scenario: Constant-current LED driver board powered from automotive 12V supply, vulnerable to back-EMF from relay-controlled loads. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to shunt inductive spikes generated by nearby relay coils. Use Value: Clamps transients within 1ps to ≤15.0V, preventing overvoltage stress on buck controller ICs and enabling robust operation in commercial vehicle lighting systems. |
Use Scenario: VBUS line in USB-C receptacle on industrial handheld device, requiring protection against hot-plug surges and ESD events. IC Role / Device Role / Timing Role: Primary surge suppression element placed before USB PD controller and load switch, sized for 1500W peak energy. Use Value: Withstands 50A 1ms pulses while adding only 0.21g mass and zero capacitance penalty - preserves signal integrity for 10Gbps USB4 data lanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A | Lower PPK (400W), smaller SMA package (DO-214AC), VBR 8.89–9.83V, VC = 13.6V @ 30A | Rated for lower-energy transients; suitable for consumer electronics but insufficient for ISO 7637-2 Pulse 5a automotive load dump. | Select SMCJ8.0 for 1500W automotive-grade surge immunity; SMAJ8.0A only where space constraints override energy requirements. |
| 1.5SMC8.0A | Same DO-214AB package and 1500W rating, but VBR 8.89–9.83V and VC = 13.6V @ 50A; manufactured by ON Semiconductor | Identical clamping performance and thermal specs; validated in same automotive test standards (ISO 7637-2, AEC-Q101). | 1.5SMC8.0A is a direct functional alternative with identical electrical behavior and mounting compatibility - ideal for dual-sourcing programs. |
Compared with SMAJ8.0A, SMCJ8.0 provides 3.75× higher surge energy handling and automotive qualification; compared with 1.5SMC8.0A, it offers identical protection capability with Taiwan Semiconductor's MSL Level 1 and halogen-free assurance.
Availability
SMCJ8.0 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input modules, LED driver overvoltage clamp circuits, and USB-C power delivery line protection requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ8.0 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, and power devices since 1979.
The SMCJ series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing robust clamping, low leakage, and AEC-Q101-qualified reliability under extended temperature and humidity stress.
FAQ
What is the polarity configuration of the SMCJ8.0?
The SMCJ8.0 is a unidirectional TVS diode with clearly marked cathode band on the DO-214AB package body. This polarity must be observed during PCB layout - cathode connects to the protected line (e.g., 12V rail), anode to ground. Bidirectional variants use "C" or "CA" suffixes (e.g., SMCJ8.0C), which are not applicable to the SMCJ8.0 part number.
Does the SMCJ8.0 meet AEC-Q101 qualification requirements?
Yes, the SMCJ8.0 is AEC-Q101 qualified for automotive applications. It undergoes rigorous stress testing including high-temperature operating life (HTOL), temperature cycling, and unbiased highly accelerated stress testing (uHAST), ensuring reliability in under-hood environments up to +150°C junction temperature.
What is the maximum clamping voltage of the SMCJ8.0 under standardized surge conditions?
The SMCJ8.0 has a maximum clamping voltage (VC) of 15.0 V when subjected to a 50 A peak impulse current (IPPM) with a 10/1000 μs waveform per IEC 61000-4-5. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can the SMCJ8.0 be used in bidirectional signal line protection?
No - the SMCJ8.0 is strictly unidirectional and unsuitable for AC or bidirectional signal lines. For such applications, select the SMCJ8.0C or SMCJ8.0CA variant, which features symmetrical breakdown in both directions and identical VBR/VC specifications for positive and negative transients.
How does the SMCJ8.0 compare to the SMCJ8.0A in terms of clamping performance?
The SMCJ8.0A offers tighter VBR tolerance (8.89–9.83 V vs. 8.89–10.9 V) and lower clamping voltage (13.6 V vs. 15.0 V at 50 A), resulting in reduced stress on downstream components. However, both share identical 1500W PPK rating, DO-214AB package, and ISO 7637-2 compliance - making SMCJ8.0A preferable where precision clamping is prioritized.
SMCJ8.0 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):
- 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)
SMCJ8.0 FAQ
1.How can I place an order for SMCJ8.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0 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 SMCJ8.0 reliable?
The price and inventory of SMCJ8.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0 is usually 5 days.
3.What payment methods are accepted for SMCJ8.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0?
SMCJ8.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0 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 SMCJ8.0?
For technical support, including SMCJ8.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0 requirements.
6.How does Aetrix verify that SMCJ8.0 is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0 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 SMCJ8.0 meets industry standards.
7.What is the process for return or replacement of SMCJ8.0?
All SMCJ8.0 units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0, 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 SMCJ8.0 part is unused and in its original packaging.
Return procedure for SMCJ8.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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