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Taiwan Semiconductor Corporation SMCJ8.0CAH
- Part No.:
- SMCJ8.0CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0CAH.pdf
- Description:
- 1500W, 9.4V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,138
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Product details
Overview
SMCJ8.0CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 8.0V working stand-off voltage, 8.89–9.83V breakdown voltage at 1mA, and 13.6V maximum clamping voltage at 50A peak pulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ8.0CAH datasheet, SMCJ8.0CAH pinout, SMCJ8.0CAH application, or SMCJ8.0CAH equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, thermal resistance values, and direct alternatives for bidirectional TVS selection in ESD- and lightning-prone systems.
Technical Context
The SMCJ8.0CAH is a glass-passivated, bipolar junction TVS diode designed for symmetrical transient suppression in both directions - no polarity dependency. Its junction-to-case thermal resistance of 10°C/W enables effective heat dissipation during repetitive 1500W surges, while its <1.0ps response time ensures sub-nanosecond clamping onset after voltage threshold breach.
It meets ISO 7637-2 test requirements for automotive load-dump and inductive-switching transients, and complies with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - confirming suitability for lead-free reflow assembly without popcorn risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 8.89 V / 9.83 V @ 1 mA - Confirmed breakdown range ensuring reliable turn-on margin above VWM |
| VC @ IPPM | 13.6 V @ 50 A - Clamping voltage limits downstream IC stress to safe levels during 10/1000μs surge |
| PPK | 1500 W - Peak pulse power rating defines single-event surge energy handling capability |
| RθJC | 10 °C/W - Enables thermal design with ≤10°C junction rise per watt conducted to PCB copper |
| IR @ VWM | <1 μA - Negligible leakage preserves battery life and signal integrity in always-on circuits |
| TJ max | +150 °C - Supports operation in under-hood automotive environments and industrial enclosures |
Pinout & Package
DO-214AB (SMC) surface-mount package: molded epoxy case rated UL 94V-0, matte tin-plated leads, cathode band omitted (bidirectional configuration). Weight: 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking required; terminals interchangeable - enables flexible PCB layout and eliminates orientation errors |
| Case (cathode band absent) | Thermal and mechanical interface | Exposed metal frame provides low-inductance path and enhances thermal transfer to heatsink or copper pour |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test plan |
| ISO 7637-2 compliance | Passes Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupled noise) |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| Fast response time | <1.0 ps - Clamps before most microcontroller I/O or power supply control loops can react |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU - supports green manufacturing and end-of-life recycling |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional clamping device placed at main power entry point before DC-DC converters. Use Value: Limits voltage excursion to ≤13.6V during 10/1000μs 50A surge, preventing latch-up or burnout of downstream regulators and CAN transceivers. | Use Scenario: Shielding 24V digital input modules from field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Primary transient shunt across input terminals, upstream of optocoupler or Schmitt-trigger conditioning stage. Use Value: Sub-1ns response captures fast-rising transients before protection ICs activate, reducing false triggering and component wear. |
| Telecom Base Station Power Rails | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding 48V DC power inputs in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense on primary DC bus, coordinated with upstream fuses and downstream ceramic capacitors. Use Value: 1500W peak power rating sustains multiple 10/1000μs events without degradation, supporting MTBF >100,000 hours. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Parallel-connected across motor terminals to clamp inductive kickback during MOSFET switching. Use Value: Symmetrical clamping prevents reverse-bias damage to drive FETs and eliminates need for dual-diode solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA | 600W PPK rating, same VWM/VBR/VC but lower surge capacity; SMB package (smaller footprint, higher RθJA) | Suitable for space-constrained consumer electronics with lower surge exposure (IEC 61000-4-2 only) | Select when board area is critical and peak surge current remains ≤25A |
| 1.5KE8.0CA | Through-hole DO-201 package, 1500W rating, identical VWM/VBR/VC specs, but slower thermal recovery and no AEC-Q101 qualification | Used in legacy industrial power supplies where automated SMT is not required | Select for cost-sensitive, non-automotive designs requiring proven field reliability over decades |
Compared with SMBJ8.0CA and 1.5KE8.0CA, the SMCJ8.0CAH delivers superior surge endurance in SMT form factor with automotive-grade qualification - making it optimal for new automotive and high-reliability industrial designs where board-level automation and ISO 7637-2 compliance are mandatory.
Availability
SMCJ8.0CAH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O hardening, telecom base station DC input conditioning, and consumer appliance motor drive surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ8.0CAH 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 is engineered specifically for high-energy transient suppression in automotive and industrial environments - emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What does the "CAH" suffix indicate in SMCJ8.0CAH?
The "CAH" suffix denotes a bidirectional configuration ("C") with AEC-Q101 qualification ("A") and halogen-free construction ("H"). Unlike unidirectional variants (e.g., SMCJ8.0H), the SMCJ8.0CAH conducts symmetrically in both polarities - eliminating polarity marking and enabling simplified placement in AC-coupled or floating rail applications.
How does SMCJ8.0CAH differ from SMCJ8.0AH?
The SMCJ8.0AH is unidirectional with a cathode band marking, while the SMCJ8.0CAH is bidirectional with no polarity marking. Both share identical VWM (8.0V), VBR (8.89–9.83V), and VC (13.6V @ 50A), but only the SMCJ8.0CAH supports reverse-voltage transients without external circuit inversion - critical for protecting differential buses or transformer-coupled interfaces.
Is SMCJ8.0CAH compatible with lead-free reflow soldering?
Yes, the SMCJ8.0CAH is fully compatible with lead-free reflow processes. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its moisture sensitivity level is J-STD-020 Level 1 - meaning it can be stored indefinitely at ambient conditions without baking prior to assembly.
What is the maximum peak pulse current (IPPM) rating for SMCJ8.0CAH?
The SMCJ8.0CAH has a maximum peak pulse current (IPPM) rating of 50 A under the standard 10/1000μs double-exponential waveform defined in Fig.5 of the datasheet. This value is derived from its 1500W peak pulse power rating and 13.6V clamping voltage (IPPM = PPK / VC = 1500W / 13.6V ≈ 50A).
Does SMCJ8.0CAH meet ISO 7637-2 Pulse 5a (load dump) requirements?
No - the SMCJ8.0CAH is rated for ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b only. Pulse 5a (load dump) requires higher clamping energy handling (typically >1000W sustained over 400ms); for that, higher-voltage variants like SMCJ24CAH or dedicated load-dump suppressors are recommended.
SMCJ8.0CAH 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:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ8.0CAH FAQ
1.How can I place an order for SMCJ8.0CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0CAH 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 SMCJ8.0CAH reliable?
The price and inventory of SMCJ8.0CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0CAH is usually 5 days.
3.What payment methods are accepted for SMCJ8.0CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0CAH?
SMCJ8.0CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0CAH 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 SMCJ8.0CAH?
For technical support, including SMCJ8.0CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0CAH requirements.
6.How does Aetrix verify that SMCJ8.0CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0CAH 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 SMCJ8.0CAH meets industry standards.
7.What is the process for return or replacement of SMCJ8.0CAH?
All SMCJ8.0CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0CAH, 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 SMCJ8.0CAH part is unused and in its original packaging.
Return procedure for SMCJ8.0CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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