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Taiwan Semiconductor Corporation SMCJ8V5A
- Part No.:
- SMCJ8V5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8V5A.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,197
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Product details
Overview
SMCJ8V5A from Taiwan Semiconductor is a unidirectional 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) at 1mA test current, and 14.4V maximum clamping voltage (VC) at 20A peak pulse current - designed for ESD and lightning surge protection in DC power rails and I/O interfaces.
For engineers reviewing the SMCJ8V5A datasheet, SMCJ8V5A pinout, SMCJ8V5A application, or SMCJ8V5A equivalent, this device is selected for robust transient immunity in automotive body electronics, industrial sensor nodes, and LED driver input stages where fast response (<1ps), low leakage (<1μA @ 8.5V), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are required.
Technical Context
The SMCJ8V5A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (9.44–10.4V); it clamps transients to ≤14.4V at 20A (10/1000μs waveform) while dissipating up to 1500W peak power for 1ms. Its glass-passivated junction ensures stable breakdown and low leakage.
Thermal performance is defined by RθJA = 55°C/W and RθJC = 10°C/W, supporting operation from –55°C to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements in its molded DO-214AB case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 9.44 V / 10.4 V @ 1 mA - Confirmed avalanche onset range under standardized test conditions |
| VC @ IPPM | 14.4 V @ 20 A (10/1000μs) - Clamped voltage during worst-case surge, limiting downstream stress |
| PPK | 1500 W - Peak pulse power handling capability per single 1ms transient |
| IR @ VWM | <1 μA - Negligible leakage at rated stand-off, preserving low-power system integrity |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with cathode band marking and 0.210g mass |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; terminals are anode and cathode - no internal circuitry or active control logic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12V rail); reverse-biased during surge events |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps rise-to-breakdown - Enables suppression of nanosecond-scale ESD and EFT events before IC damage occurs |
| ISO 7637-2 compliance | Pulse 1, 2a, 2b, 3a, 3b - Validated for automotive load-dump and inductive-switching immunity per OEM requirements |
| Glass passivated junction | Stable VBR tolerance and low IR drift over temperature and lifetime - critical for long-term reliability in harsh environments |
| Moisture sensitivity level | MSL Level 1 (per J-STD-020) - No floor-life limitation; suitable for standard SMT reflow without dry-packaging |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from battery dump and relay coil flyback in door modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground, clamping transients within 14.4V to prevent latch-up or oxide rupture. Use Value: Maintains signal integrity during 100V/50ms load-dump pulses while drawing <1μA standby current. | Use Scenario: Safeguarding 4–20mA analog input circuits in PLC analog I/O cards exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-connected TVS on current-loop input path, absorbing ±1kV EFT bursts per IEC 61000-4-4. Use Value: Limits voltage excursion to ≤14.4V at 20A, preventing op-amp input stage damage without affecting loop accuracy. |
| LED Driver Input Stage | USB-C Power Delivery Port |
Use Scenario: Suppressing inductive kickback from buck converter MOSFETs and input capacitor charging spikes in outdoor LED drivers. IC Role / Device Role / Timing Role: Primary DC rail protector upstream of controller IC, rated for 1500W peak pulse energy. Use Value: Withstands repeated 10/1000μs surges up to 20A without degradation, extending driver MTBF. | Use Scenario: Secondary-level surge protection on VBUS line of USB-C receptacles in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional clamping device between VBUS and chassis ground, activated only during overvoltage faults. Use Value: Clamps 1kV ESD (IEC 61000-4-2) to <14.4V within <1ps, preserving PD controller communication integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A | Lower PPK (600W), same VWM/VBR/VC specs, SMB package (smaller footprint, higher RθJA) | Not suitable for 1500W automotive load-dump; limited to lower-energy ESD/EFT scenarios | Select when board space is constrained and surge energy does not exceed 600W |
| 1.5SMC8.5A | Identical electrical specs and DO-214AB package; manufactured by ON Semiconductor with same JEDEC outline | No functional or layout difference - direct second-source option with identical thermal and clamping behavior | Choose for supply chain diversification without redesign or qualification retesting |
Compared with SMBJ8.5A, the SMCJ8V5A delivers 2.5× higher surge power handling and superior thermal dissipation; versus 1.5SMC8.5A, it offers identical performance with alternate sourcing - making SMCJ8V5A optimal for high-reliability 12V/24V systems requiring full ISO 7637-2 compliance.
Availability
SMCJ8V5A is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial PLC analog inputs, and LED lighting driver designs requiring stable component supply across multi-year production cycles.
Supply support for SMCJ8V5A 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 industrial and automotive markets.
The SMCJ series was developed specifically for high-energy transient suppression in 12V/24V/48V automotive and industrial power systems, emphasizing ruggedness, repeatable clamping, and AEC-Q101 readiness.
FAQ
What is the maximum clamping voltage of the SMCJ8V5A under standard test conditions?
The SMCJ8V5A has a maximum clamping voltage (VC) of 14.4 V when subjected to a 10/1000μs peak pulse current of 20 A, as specified in the official Taiwan Semiconductor datasheet. This value ensures protected circuits remain below critical voltage thresholds during surge events. The SMCJ8V5A maintains this clamping performance consistently across its operational temperature range.
Is the SMCJ8V5A suitable for bidirectional transient protection?
No, the SMCJ8V5A is a unidirectional TVS diode, intended for DC rail protection where polarity is fixed. For bidirectional applications such as AC lines or data buses, a part with "CA" suffix (e.g., SMCJ8.5CA) must be used. The SMCJ8V5A's cathode band marking and electrical specifications apply only in reverse-bias mode - forward conduction is not rated for surge suppression.
Does the SMCJ8V5A meet automotive EMC standards?
Yes, the SMCJ8V5A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for electrical disturbances in road vehicles, validated per the manufacturer's test reports. Its 1500W peak power rating and sub-1ps response enable compliance with OEM-level surge immunity specifications when properly laid out with low-inductance grounding. The SMCJ8V5A is commonly deployed in BCM and ADAS power domains.
What is the thermal resistance from junction to ambient for the SMCJ8V5A?
The SMCJ8V5A has a junction-to-ambient thermal resistance (RθJA) of 55°C/W under standard PCB mounting conditions (JEDEC High-K test board). This value assumes the device is soldered to a 1-inch² copper pad with two thermal vias. Derating curves in the datasheet show power capability decreases linearly above 25°C ambient, down to zero at 150°C junction temperature.
Can the SMCJ8V5A replace the SMCJ8.5A in existing designs?
Yes - SMCJ8V5A and SMCJ8.5A are functionally identical part numbers from Taiwan Semiconductor; "V5" and ".5" denote the same 8.5V VWM rating and share identical electrical, thermal, and mechanical specifications including DO-214AB packaging and marking code GDT. The SMCJ8V5A may be used as a drop-in replacement with no layout or validation changes required.
SMCJ8V5A 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ8V5A FAQ
1.How can I place an order for SMCJ8V5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8V5A 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 SMCJ8V5A reliable?
The price and inventory of SMCJ8V5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8V5A is usually 5 days.
3.What payment methods are accepted for SMCJ8V5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8V5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8V5A?
SMCJ8V5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8V5A 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 SMCJ8V5A?
For technical support, including SMCJ8V5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8V5A requirements.
6.How does Aetrix verify that SMCJ8V5A is sourced from the original manufacturer or authorized distributors?
All SMCJ8V5A 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 SMCJ8V5A meets industry standards.
7.What is the process for return or replacement of SMCJ8V5A?
All SMCJ8V5A units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8V5A, 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 SMCJ8V5A part is unused and in its original packaging.
Return procedure for SMCJ8V5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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