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Vishay General Semiconductor - Diodes Division SMCJ11A-M3/9AT
- Part No.:
- SMCJ11A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11A-M3/9AT.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,125
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Product details
Overview
SMCJ11A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping ESD and surge transients on power and signal lines. It features 11 V standoff voltage (VWM), 12.2–13.5 V breakdown (VBR at 1 mA), 18.2 V max clamping voltage (VC) at 82.4 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMCJ11A-M3/9AT datasheet, SMCJ11A-M3/9AT pinout, SMCJ11A-M3/9AT application, or SMCJ11A-M3/9AT equivalent, key selection criteria include unidirectional polarity, 1500 W surge capability, 18.2 V clamping under 82.4 A surge, -55 °C to +150 °C operating temperature range, and halogen-free RoHS-compliant M3 termination grade suitable for high-reliability automated assembly.
Technical Context
The SMCJ11A-M3/9AT operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its VBR threshold (12.2–13.5 V), limiting transient energy by shunting surge current to ground. Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD (IEC 61000-4-2), lightning-induced surges (IEC 61000-4-5), and inductive switching spikes.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to 150 °C junction temperature. The device is mounted on 8.0 mm × 8.0 mm copper pads per terminal and meets MSL level 1 (J-STD-020) with 260 °C lead-free reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 12.2 V / 13.5 V at 1 mA - precise avalanche onset range defining turn-on consistency |
| VC @ IPPM | 18.2 V at 82.4 A - clamped voltage during full 1500 W surge, critical for downstream IC voltage margin |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, enabling robust surge immunity |
| IPPM | 82.4 A - peak surge current capacity directly tied to PCB pad thermal design (8 mm × 8 mm Cu) |
| TJ range | -55 °C to +150 °C - wide junction temperature range supporting under-hood automotive and industrial environments |
| Leakage ID | 5.0 µA max at VWM - minimal standby power loss and signal integrity impact on protected lines |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant M3 termination. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (unidirectional only) | Connected to protected line; conducts during forward-biased transients or DC bias conditions |
| Cathode | Clamping reference node | Marked end; connects to ground or low-impedance return path to divert surge current away from load |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe 10/1000 µs surges (e.g., ISO 7637-2 Pulse 5a) without derating in standard layouts |
| 18.2 V clamping voltage at 82.4 A | Ensures protected ICs (e.g., 16 V-rated gate drivers) remain within absolute maximum ratings during worst-case surge |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
| Halogen-free M3 termination | Meets strict environmental compliance (IEC 61249-2-21) while maintaining solderability per J-STD-002/JESD 22-B102 |
| 150 °C max junction temperature | Supports placement near heat sources (e.g., power converters) without thermal derating in most applications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp positive-going surges above 11 V. Use Value: Limits voltage to ≤18.2 V during 82.4 A transients, preventing damage to downstream PMICs and microcontrollers. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected across differential or single-ended signal pair to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-1 ns response ensures clamping occurs before sensitive op-amps or ADC inputs are overstressed. |
| DC-DC Converter Input Protection | MOSFET Gate Driver Protection |
Use Scenario: Safeguarding buck converter inputs against inductive kickback from upstream relays or solenoids. IC Role / Device Role / Timing Role: Mounted at converter input capacitor to clamp transients before they reach controller IC and FETs. Use Value: 1500 W rating handles repetitive 50–100 A surges common in heavy-duty industrial controls. | Use Scenario: Preventing gate oxide rupture in high-side N-channel MOSFETs driven by logic-level signals. IC Role / Device Role / Timing Role: Placed between gate and source to clamp negative-going spikes induced by Miller effect or parasitic inductance. Use Value: Low leakage (5 µA) avoids unintended gate discharge; 18.2 V clamping protects 20 V max-rated gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-M3/8A | Lower PPPM (400 W), smaller SMA package, same VWM/VC specs | Not suitable for >400 W surge environments (e.g., automotive load dump); limited thermal mass | Select when space-constrained and surge threat is limited to ESD/lightning secondary effects |
| SMCJ11CA-M3/9AT | Bidirectional variant; symmetric VBR and VC in both polarities; same package and power rating | Required for AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, CAN bus) | Choose for bidirectional protection needs; not a drop-in replacement due to polarity architecture difference |
Compared with SMAJ11A-M3/8A and SMCJ11CA-M3/9AT, the SMCJ11A-M3/9AT provides higher surge robustness in unidirectional DC systems while maintaining compatibility with standard SMC footprint assembly processes - making it optimal for automotive power distribution and industrial control modules requiring 1500 W immunity.
Availability
SMCJ11A-M3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, DC-DC converter input safeguarding, MOSFET gate driver shielding, and telecommunication line surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ11A-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity, AEC-Q101 qualification readiness, and robust thermal performance are essential.
FAQ
What is the clamping voltage of the SMCJ11A-M3/9AT under maximum rated surge current?
The SMCJ11A-M3/9AT has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current of 82.4 A using a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMCJ11A-M3/9AT maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), ensuring consistent protection in demanding environments.
Is the SMCJ11A-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
The SMCJ11A-M3/9AT itself is not AEC-Q101 qualified; however, Vishay offers the functionally identical SMCJ11A-HM3/9AT variant (with HM3 suffix) that meets AEC-Q101 requirements. The SMCJ11A-M3/9AT shares the same electrical characteristics, package, and thermal behavior but is rated for commercial-grade use. For automotive designs requiring formal qualification, the HM3 version must be specified - the SMCJ11A-M3/9AT remains appropriate for non-automotive industrial and consumer applications where AEC-Q101 is not mandated.
How does the SMCJ11A-M3/9AT differ from the bidirectional SMCJ11CA-M3/9AT?
The SMCJ11A-M3/9AT is unidirectional and clamps only positive transients relative to its cathode, whereas the SMCJ11CA-M3/9AT is bidirectional and suppresses surges of either polarity symmetrically. Both share identical VWM (11 V), VC (18.2 V), and PPPM (1500 W) ratings, but the SMCJ11CA-M3/9AT has no polarity marking and requires no orientation during placement. The SMCJ11A-M3/9AT is preferred for DC power lines with defined ground reference; the CA variant suits AC-coupled or floating data lines like CAN or RS-485 where polarity reversal occurs.
What PCB layout guidance applies to the SMCJ11A-M3/9AT to achieve full 1500 W surge rating?
To sustain the full 1500 W peak pulse power rating, the SMCJ11A-M3/9AT must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal, as specified in Vishay's datasheet Figure 2. Smaller pads cause thermal derating - e.g., a 2.5 mm × 2.5 mm pad reduces IPPM by ~40%. Trace width should be ≥1.5 mm, and ground planes must be solid beneath the device. The SMCJ11A-M3/9AT's RθJL = 15 °C/W assumes direct thermal coupling to leads; inadequate copper area raises junction temperature and risks parametric shift or failure during repeated surges.
Does the SMCJ11A-M3/9AT have a specified junction capacitance for high-speed signal line protection?
No, junction capacitance is not specified for the SMCJ11A-M3/9AT in the official Vishay datasheet (Document Number 88394). Capacitance data is provided only for lower-voltage SMCJ variants (e.g., SMCJ5.0A) in Figure 4, and the SMCJ11A-M3/9AT falls outside that characterization scope. For high-speed signal protection (e.g., USB, HDMI), designers should select TVS devices explicitly rated for low capacitance (e.g., <1 pF) and verified for signal integrity - the SMCJ11A-M3/9AT is optimized for power-line and medium-speed analog protection, not GHz-range data paths. The SMCJ11A-M3/9AT remains valid for sensor outputs, power rails, and control signals where bandwidth is below ~10 MHz.
SMCJ11A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 82.4A
- 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)
SMCJ11A-M3/9AT FAQ
1.How can I place an order for SMCJ11A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11A-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 SMCJ11A-M3/9AT reliable?
The price and inventory of SMCJ11A-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 SMCJ11A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ11A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11A-M3/9AT?
SMCJ11A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11A-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 SMCJ11A-M3/9AT?
For technical support, including SMCJ11A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11A-M3/9AT requirements.
6.How does Aetrix verify that SMCJ11A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ11A-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 SMCJ11A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ11A-M3/9AT?
All SMCJ11A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11A-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 SMCJ11A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ11A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11A-M3/9AT Tags
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