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Vishay General Semiconductor - Diodes Division SMCJ8.0CA-M3/9AT
- Part No.:
- SMCJ8.0CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0CA-M3/9AT.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,068
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Product details
Overview
SMCJ8.0CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 13.6 V maximum clamping voltage at 110.3 A peak pulse current. It features 8.0 V stand-off voltage, 8.89–9.83 V breakdown voltage range at 1 mA test current, and operates across -55 °C to +150 °C junction temperature.
For engineers reviewing the SMCJ8.0CA-M3/9AT datasheet, SMCJ8.0CA-M3/9AT pinout, SMCJ8.0CA-M3/9AT application, or SMCJ8.0CA-M3/9AT equivalent, this device serves as a robust, halogen-free, RoHS-compliant protection solution for automotive-grade and industrial signal-line surge suppression where bidirectional clamping and low incremental surge resistance are critical.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and stable clamping under 10/1000 μs surge waveforms. Its symmetrical I-V characteristics enable identical forward and reverse conduction behavior, eliminating polarity concerns in AC-coupled or floating signal paths.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and delivers 75 °C/W typical junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads - enabling reliable operation without heatsinking in most PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 8.0 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below breakdown. |
| Breakdown Voltage (VBR) | 8.89–9.83 V at 1 mA - Confirmed voltage range where device transitions from high-impedance to low-impedance clamping state. |
| Clamping Voltage (VC) | 13.6 V at 110.3 A IPPM - Peak voltage seen by protected circuit during worst-case 10/1000 μs transient; determines downstream IC survivability. |
| Peak Pulse Power (PPPM) | 1500 W - Maximum single-event surge energy absorption capability under standardized waveform; enables IEC 61000-4-5 Level 4 compliance. |
| Leakage Current (ID) | ≤50 μA at 8.0 V - Low reverse leakage ensures minimal power loss and signal integrity degradation in standby or low-power modes. |
| Operating Temperature | -55 °C to +150 °C - Full industrial and automotive ambient range support without derating; validated for under-hood and motor-control environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
SMCJ8.0CA-M3/9AT is housed in an SMC (DO-214AB) plastic package with two terminals: anode and cathode. As a bidirectional device, it has no polarity marking and conducts identically in both directions - no cathode band is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal functions as anode or cathode depending on instantaneous voltage polarity; symmetric conduction enables AC line and differential signal protection. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; no functional distinction - simplifies PCB layout and eliminates orientation constraints during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled, floating, or differential interfaces (e.g., RS-485, CAN, USB D+/D-) without external polarity management. |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) and 2 kV (line-to-line) with appropriate series impedance. |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for automotive and industrial OEMs while maintaining full electrical performance equivalence to E3 variants. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - eliminates baking requirements and reduces manufacturing overhead. |
| Low clamping ratio (VC/VWM = 1.7) | Minimizes overvoltage stress on downstream components compared to higher-ratio suppressors; improves system-level reliability margin. |
Applications
| Automotive Sensor Signal Lines | Industrial RS-485 Communication Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of engine coolant temperature or manifold absolute pressure sensors exposed to load-dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching sensor signal conditioning IC. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2b (inductive switch-off), preventing sensor offset drift or ADC saturation. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLC I/O modules subjected to ground potential differences and lightning-induced surges. IC Role / Device Role / Timing Role: Paired TVS on A/B differential pair to clamp common-mode transients while preserving data eye integrity during 10 Mbps operation. Use Value: Enables >15 kV ESD contact discharge immunity (IEC 61000-4-2) and 4 kV surge protection (IEC 61000-4-5) without signal distortion or bit errors. |
| Consumer Audio Line Inputs | Medical Patient Monitoring ECG Leads |
|
Use Scenario: Shielding unbalanced audio inputs (RCA, 3.5 mm jack) in AV receivers from electrostatic discharge and nearby RF coupling. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed between input coupling capacitor and op-amp buffer to prevent latch-up or input stage damage. Use Value: Limits clamped voltage to ≤13.6 V during 8 kV air discharge, avoiding op-amp rail-to-rail saturation and audible pop artifacts. |
Use Scenario: Protecting high-impedance ECG electrode inputs from defibrillator recovery spikes and hospital-grade ESD events. IC Role / Device Role / Timing Role: First-stage transient suppressor located at front-end connector to absorb >50 A surge currents before ultra-low-noise instrumentation amplifier. Use Value: Prevents amplifier saturation and baseline wander during IEC 60601-1-2 Ed. 4.0 defibrillation testing, ensuring uninterrupted patient monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC8.0CA | Same VWM (8.0 V) and VC (13.6 V), but lower PPPM (1000 W); smaller SMA package (DO-214AC). | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4; preferred where board space is constrained. | Select SAC8.0CA only when surge threat level is ≤1 kV and PCB area is premium; SMCJ8.0CA-M3/9AT remains optimal for full automotive/industrial immunity. |
| SMCJ8.0A-M3/9AT | Unidirectional variant with identical VWM, VBR, and VC, but includes cathode band marking and asymmetric I-V curve. | Requires correct polarity placement; suitable only for DC-biased or ground-referenced lines (e.g., power supply rails), not AC/differential signals. | Choose SMCJ8.0A-M3/9AT for positive-rail protection; retain SMCJ8.0CA-M3/9AT for bidirectional or floating nodes where polarity cannot be guaranteed. |
Compared with SAC8.0CA and SMCJ8.0A-M3/9AT, the SMCJ8.0CA-M3/9AT uniquely combines 1500 W surge capacity, true bidirectional symmetry, and SMC package robustness - making it the only choice for high-reliability AC-coupled interface protection across automotive, industrial, and medical domains.
Availability
SMCJ8.0CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial communication bus hardening, and medical ECG lead safeguarding requiring stable component supply and long-term lifecycle continuity.
Supply support for SMCJ8.0CA-M3/9AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive powertrain, industrial control, and telecom infrastructure where failure is not an option.
FAQ
What is the clamping voltage of SMCJ8.0CA-M3/9AT at its rated peak pulse current?
The SMCJ8.0CA-M3/9AT has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current (IPPM) of 110.3 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88394. The SMCJ8.0CA-M3/9AT maintains this clamping performance across its full operating temperature range, ensuring predictable protection behavior in real-world conditions.
Is SMCJ8.0CA-M3/9AT suitable for automotive applications?
Yes, the SMCJ8.0CA-M3/9AT is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; however, the M3/9AT variant is commercial-grade and widely deployed in automotive subsystems such as body control modules and sensor interfaces where full qualification is not mandated. Its -55 °C to +150 °C operating range, MSL Level 1 rating, and robust surge handling make the SMCJ8.0CA-M3/9AT a proven choice for non-safety-critical automotive electronics.
How does the bidirectional design of SMCJ8.0CA-M3/9AT affect PCB layout?
The bidirectional nature of SMCJ8.0CA-M3/9AT eliminates polarity constraints - there is no cathode band or directional marking, so either terminal may connect to either side of a differential or AC-coupled line. This simplifies layout, reduces assembly errors, and enables symmetric placement on RS-485 or CAN bus traces. The SMCJ8.0CA-M3/9AT requires no orientation verification during automated placement, cutting process validation time.
What is the thermal resistance of SMCJ8.0CA-M3/9AT, and how does it impact power dissipation?
The SMCJ8.0CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. At its rated 6.5 W steady-state power dissipation, this yields ~488 °C rise above ambient - confirming that the device is intended for transient-only duty, not continuous power handling. The SMCJ8.0CA-M3/9AT relies on short-duration surge absorption, not sustained thermal management.
Does SMCJ8.0CA-M3/9AT meet RoHS and halogen-free requirements?
Yes, the "M3" suffix in SMCJ8.0CA-M3/9AT explicitly denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standards (www.vishay.com/doc?99912). This includes bromine- and chlorine-free molding compounds and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. The SMCJ8.0CA-M3/9AT satisfies EU RoHS Directive 2011/65/EU and IPC-1752A reporting requirements for green electronics manufacturing.
SMCJ8.0CA-M3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- 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):
- 110.3A
- 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)
SMCJ8.0CA-M3/9AT FAQ
1.How can I place an order for SMCJ8.0CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0CA-M3/9AT 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 SMCJ8.0CA-M3/9AT reliable?
The price and inventory of SMCJ8.0CA-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.0CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ8.0CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0CA-M3/9AT?
SMCJ8.0CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0CA-M3/9AT 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 SMCJ8.0CA-M3/9AT?
For technical support, including SMCJ8.0CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0CA-M3/9AT requirements.
6.How does Aetrix verify that SMCJ8.0CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0CA-M3/9AT 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 SMCJ8.0CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ8.0CA-M3/9AT?
All SMCJ8.0CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0CA-M3/9AT, 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 SMCJ8.0CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ8.0CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0CA-M3/9AT Tags
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