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Taiwan Semiconductor Corporation SMCJ8.0AH
- Part No.:
- SMCJ8.0AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0AH.pdf
- Description:
- 1500W, 9.4V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,481
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Product details
Overview
SMCJ8.0AH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 8.89V minimum breakdown voltage, 9.83V maximum breakdown voltage at 1mA test current, 8V working stand-off voltage, and 13.6V maximum clamping voltage at 50A peak pulse current-designed for ESD and surge protection in automotive power line interfaces.
For engineers reviewing the SMCJ8.0AH datasheet, SMCJ8.0AH pinout, SMCJ8.0AH application, or SMCJ8.0AH equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms, AEC-Q101 qualification status, and thermal resistance (RθJC = 10°C/W) for high-reliability board-level surge immunity.
Technical Context
The SMCJ8.0AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (8.89–9.83 V), clamping transients to ≤13.6 V at 50 A per 10/1000 µs waveform. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at 8 V).
Designed for automotive-grade robustness, it meets ISO 7637-2 Pulse 1 (inductive load dump suppression), Pulse 2a (battery disconnect), Pulse 2b (alternator load dump), and Pulse 3a/3b (capacitive coupling & ignition noise), with junction temperature range of –55°C to +150°C and moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min / max | 8.89 V / 9.83 V at IT = 1 mA - defines precise turn-on threshold for reliable overvoltage triggering |
| VWM | 8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 13.6 V at 50 A (10/1000 µs) - clamping voltage limiting stress on downstream ICs during surge events |
| PPK | 1500 W - peak pulse power handling capacity under standardized transient conditions |
| IR @ VWM | <1 µA - ultra-low reverse leakage preserves system standby power integrity |
| RθJC | 10 °C/W - enables efficient heat transfer from junction to case for sustained surge duty cycles |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V battery rail); conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and powertrain applications per stress test requirements |
| Glass passivated junction | Ensures long-term parameter stability and reduced parameter drift under thermal cycling |
| Clamping ratio VC/VBR ≈ 1.38 | Low ratio indicates efficient voltage limiting with minimal overvoltage margin above breakdown |
| Fast response time <1 ps | Enables protection of high-speed interfaces before transient energy couples into sensitive circuitry |
| Moisture sensitivity level 1 | Eliminates need for dry-packaging or bake-out prior to reflow, simplifying SMT assembly |
Applications
| Automotive Power Line Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules against load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp surges before regulator stage. Use Value: Clamps 50 A transients to 13.6 V, maintaining safe input voltage for 16 V-rated buck converters and preventing latch-up or damage. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Front-end transient suppressor on isolated 24 V sensor inputs, paired with optocoupler or digital isolator. Use Value: Limits transient overshoot to <14 V, preserving signal integrity and enabling direct interface with 3.3 V/5 V microcontroller GPIOs via level-shifting. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) receiving 48 V DC over Ethernet cables subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge clamp on DC input side of PoE PD controller, upstream of DC-DC conversion. Use Value: Withstands 1500 W pulses while holding clamped voltage below 15 V, ensuring compliance with IEEE 802.3af/at surge immunity requirements. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Flyback diode replacement with superior clamping performance across motor H-bridge outputs. Use Value: Reduces voltage overshoot from >60 V to ≤14 V during switch-off, protecting MOSFETs rated for 30 V and extending drive-stage reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | 600 W peak power, SMB package (smaller footprint), higher RθJA (75°C/W), same VBR range | Lower surge energy handling; suitable only for lighter-duty consumer applications | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only |
| 1.5KE8.0A | Through-hole TO-204AA (DO-41), 1500 W, same VBR/VC, but slower response (~1 ns vs. <1 ps) | Not suitable for automated SMT lines; requires wave soldering or hand assembly | Choose only for legacy through-hole designs where rework flexibility outweighs AEC-Q101 and SMT compatibility needs |
Compared with SMBJ8.0A and 1.5KE8.0A, the SMCJ8.0AH delivers identical clamping performance in a surface-mount AEC-Q101-qualified package with superior thermal path (RθJC = 10°C/W) and sub-picosecond response-making it the preferred choice for automotive and industrial SMT production requiring repeatable surge immunity validation.
Availability
SMCJ8.0AH is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial PLC analog input modules, and telecom DC feed protection requiring stable component supply across extended temperature and high-reliability environments.
Supply support for SMCJ8.0AH 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 with global distribution and AEC-Q101 process validation.
The SMCJ series was developed specifically for high-energy transient suppression in automotive and industrial systems, emphasizing low clamping ratio, fast response, and robust packaging for automated SMT deployment.
FAQ
What is the polarity configuration of the SMCJ8.0AH?
The SMCJ8.0AH is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB package. It conducts in reverse bias during overvoltage events and blocks forward current up to 3.5 V at 100 A, as specified for SMCJ5.0H–SMCJ90H devices. This polarity enables targeted protection of positive-rail systems like automotive 12 V lines without interfering with normal forward operation.
Does the SMCJ8.0AH meet automotive qualification standards?
Yes, the SMCJ8.0AH is AEC-Q101 qualified and explicitly designed for automotive applications. It complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test waveforms, supports junction temperatures from –55°C to +150°C, and carries moisture sensitivity level 1-ensuring suitability for under-hood and powertrain ECUs without preconditioning.
How does the clamping voltage of SMCJ8.0AH compare to its breakdown voltage?
The SMCJ8.0AH has a VBR range of 8.89–9.83 V and clamps to 13.6 V at 50 A (10/1000 µs). This yields a clamping ratio (VC/VBRmin) of ~1.53, indicating tight voltage control during surge events. The low ratio ensures protected ICs experience minimal overvoltage stress-critical for safeguarding 16 V-rated regulators and 5 V logic interfaces.
Can SMCJ8.0AH be used in bidirectional configurations?
No-the SMCJ8.0AH is unidirectional only. For bidirectional protection, Taiwan Semiconductor specifies part numbers with "CH" or "CAH" suffixes (e.g., SMCJ8.0CH). Using SMCJ8.0AH in reverse-biased AC or bipolar signal paths risks permanent failure due to forward conduction beyond its 3.5 V VF rating at 100 A.
What is the maximum steady-state power dissipation for SMCJ8.0AH?
The SMCJ8.0AH has a steady-state power dissipation (PD) of 5 W at TA = 25°C. This rating applies only to continuous DC or low-frequency reverse bias conditions-not transient suppression. In normal operation, reverse leakage remains <1 µA at 8 V, resulting in negligible static power loss (<8 µW), making it ideal for always-on automotive modules.
SMCJ8.0AH 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 115A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ8.0AH FAQ
1.How can I place an order for SMCJ8.0AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0AH 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 SMCJ8.0AH reliable?
The price and inventory of SMCJ8.0AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0AH is usually 5 days.
3.What payment methods are accepted for SMCJ8.0AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0AH?
SMCJ8.0AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0AH 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 SMCJ8.0AH?
For technical support, including SMCJ8.0AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0AH requirements.
6.How does Aetrix verify that SMCJ8.0AH is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0AH 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 SMCJ8.0AH meets industry standards.
7.What is the process for return or replacement of SMCJ8.0AH?
All SMCJ8.0AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0AH, 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 SMCJ8.0AH part is unused and in its original packaging.
Return procedure for SMCJ8.0AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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