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Vishay General Semiconductor - Diodes Division SMCJ11CA-M3/9AT
- Part No.:
- SMCJ11CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11CA-M3/9AT.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,115
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Product details
Overview
SMCJ11CA-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 on signal or power lines. It features a 11 V standoff voltage (VWM), 18.2 V maximum clamping voltage 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 control systems.
For engineers reviewing the SMCJ11CA-M3/9AT datasheet, SMCJ11CA-M3/9AT pinout, SMCJ11CA-M3/9AT application, or SMCJ11CA-M3/9AT equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge handling, SMC package compatibility with automated placement, and halogen-free RoHS compliance per M3 suffix.
Technical Context
The SMCJ11CA-M3/9AT operates as a silicon avalanche diode with symmetrical breakdown in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM).
It delivers fast response time (<1.0 ps), low incremental surge resistance, and thermal stability up to +150 °C junction temperature. The device meets J-STD-020 MSL Level 1 and is rated for 200 A non-repetitive forward surge (unidirectional mode only; not applicable in bidirectional operation).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 11 V - maximum continuous reverse voltage before clamping begins; defines operating margin for protected circuitry |
| VBR (Breakdown Voltage) | 12.2 V min / 13.5 V max at 1.0 mA - ensures reliable avalanche initiation within tight tolerance band |
| VC (Clamping Voltage) | 18.2 V at 82.4 A IPPM - limits transient voltage seen by downstream components during 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 1500 W - sustains high-energy transients such as ISO 7637-2 pulse 5a without failure |
| ID (Reverse Leakage) | ≤1.0 μA at VWM - minimizes standby power loss and avoids false triggering in low-current sensor circuits |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
| Temperature Range | −55 °C to +150 °C - supports under-hood automotive and industrial environments |
Pinout & Package
SMCJ11CA-M3/9AT uses the SMC (DO-214AB) package: a 2-terminal, non-polarized surface-mount outline with no marking for bidirectional devices. Thermal performance requires 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal per Vishay specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts during positive overvoltage events; forms symmetrical path with cathode in bidirectional mode |
| Cathode | Transient current entry (negative half-cycle) | Conducts during negative overvoltage events; enables full-wave clamping without external polarity management |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating I/O without polarity constraints |
| 1500 W peak pulse power | Withstands severe load-dump and inductive-switching transients common in 12 V/24 V automotive and industrial power rails |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for global OEM programs including automotive Tier 1 supply chains |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing flow |
| Low clamping ratio (VC/VWM = 1.65) | Minimizes voltage overshoot during clamping - critical for protecting 12 V-rated logic and analog front-ends |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects microcontroller GPIOs and CAN transceiver bias lines from load-dump and jump-start transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative voltage excursions on shared signal/power nets. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic while maintaining <1.0 μA leakage at 11 V nominal rail. | Use Scenario: Shields 24 V digital input optocoupler interfaces from inductive kickback generated by solenoid and relay switching. IC Role / Device Role / Timing Role: Fast-response avalanche diode shunts energy away from input conditioning circuitry during 10/1000 μs surges. Use Value: Ensures >1500 W surge immunity without derating at 85 °C ambient, supporting Class I, Division 2 hazardous location designs. |
| Telecom Remote Radio Unit (RRU) | Consumer Appliance Motor Control Board |
Use Scenario: Guards RS-485 communication lines between baseband unit and remote radio head against ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Symmetrical clamping maintains signal integrity on differential pairs without introducing DC offset. Use Value: 18.2 V clamping voltage stays below absolute maximum ratings of 25 V RS-485 transceivers under worst-case surge conditions. | Use Scenario: Safeguards MCU ADC inputs and Hall-effect sensor outputs from commutation noise and back-EMF spikes in BLDC motor drives. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) avoids signal distortion on high-speed analog sensing paths. Use Value: Enables direct placement adjacent to sensor ICs with minimal PCB trace length, preserving bandwidth and noise immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC11CA-13-F | Lower PPPM (600 W); higher VBR (12.8–14.2 V); same SMC package | Not suitable for ISO 7637-2 pulse 5a; limited to lower-energy IEC 61000-4-5 line surges | Select when cost sensitivity outweighs surge robustness and system-level testing confirms 600 W sufficiency |
| 1.5KE11CA | Through-hole DO-201 package; identical VWM/VC specs; higher RθJA (100 °C/W vs. 75 °C/W) | Requires manual or wave soldering; less suitable for high-density automated assembly | Choose only for legacy through-hole designs or where thermal mass of leadframe provides marginal advantage in short-duration pulses |
Compared with SAC11CA-13-F and 1.5KE11CA, the SMCJ11CA-M3/9AT offers superior surge handling (1500 W), optimized thermal resistance (75 °C/W), and halogen-free compliance - making it the preferred choice for new automotive and industrial SMT designs requiring AEC-Q101-aligned reliability.
Availability
SMCJ11CA-M3/9AT is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ11CA-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, power efficiency, and automotive-grade qualification.
The SMCJ series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against load dump, ESD, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of the SMCJ11CA-M3/9AT under maximum rated surge current?
The SMCJ11CA-M3/9AT has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 82.4 A using a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024. The SMCJ11CA-M3/9AT maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is the SMCJ11CA-M3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
No - the SMCJ11CA-M3/9AT carries the M3 suffix, indicating halogen-free and RoHS-compliant commercial grade construction. For AEC-Q101 qualification, the correct variant is SMCJ11CAHM3_X (e.g., SMCJ11CAHM3_A/I), which includes additional stress testing and traceability. The SMCJ11CA-M3/9AT itself is not AEC-Q101 qualified, though it shares the same die and package design as qualified versions.
Does the SMCJ11CA-M3/9AT have polarity markings on the package?
No - the SMCJ11CA-M3/9AT is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) case. Unlike unidirectional variants (e.g., SMCJ11A), which use a cathode band, the CA suffix denotes symmetrical breakdown and absence of marking. PCB layout must treat both terminals as functionally identical for transient conduction in either direction.
What is the thermal resistance of the SMCJ11CA-M3/9AT, and how does it affect PCB layout?
The SMCJ11CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. To achieve this rating, PCB layout must allocate minimum 8.0 mm² copper area per pad with internal thermal vias recommended for sustained power dissipation. Reduced pad size increases RθJA and risks thermal runaway during repetitive surge events.
Can the SMCJ11CA-M3/9AT be used in place of a unidirectional SMCJ11A in an existing design?
Yes - the SMCJ11CA-M3/9AT can replace SMCJ11A in most applications, but only if the circuit is inherently symmetric or referenced to ground with no DC bias polarity constraint. Because the CA version clamps in both directions, it may conduct during normal negative excursions where the unidirectional part would remain blocking. Verify signal swing range and DC bias conditions before substitution; the SMCJ11CA-M3/9AT is not a drop-in replacement in circuits relying on unidirectional blocking.
SMCJ11CA-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):
- 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)
SMCJ11CA-M3/9AT FAQ
1.How can I place an order for SMCJ11CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11CA-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 SMCJ11CA-M3/9AT reliable?
The price and inventory of SMCJ11CA-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 SMCJ11CA-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ11CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11CA-M3/9AT?
SMCJ11CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11CA-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 SMCJ11CA-M3/9AT?
For technical support, including SMCJ11CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11CA-M3/9AT requirements.
6.How does Aetrix verify that SMCJ11CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ11CA-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 SMCJ11CA-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ11CA-M3/9AT?
All SMCJ11CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11CA-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 SMCJ11CA-M3/9AT part is unused and in its original packaging.
Return procedure for SMCJ11CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11CA-M3/9AT Tags
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