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Taiwan Semiconductor Corporation SMCJ11A
- Part No.:
- SMCJ11A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11A.pdf
- Description:
- TVS DIODE 11VWM 18.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,136
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Product details
Overview
SMCJ11A from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 11V working stand-off voltage (VWM), 12.2–13.5V breakdown voltage (VBR), and 18.2V maximum clamping voltage (VC) at 86A peak pulse current - designed for automotive load-dump and ESD protection in power supply rails and I/O interfaces.
For engineers reviewing the SMCJ11A datasheet, SMCJ11A pinout, SMCJ11A application, or SMCJ11A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature derating above 25°C, moisture sensitivity level (MSL 1), and compatibility with automated SMT placement on high-reliability industrial PCBs.
Technical Context
The SMCJ11A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (12.2–13.5V @ IT = 1mA); it clamps transients to ≤18.2V at 86A (10/1000μs waveform), limiting energy dissipation to 1500W for non-repetitive pulses. Its glass-passivated junction ensures stable leakage (<1μA @ 11V) and fast response (<1.0ps).
Thermal design relies on RθJA = 55°C/W and RθJC = 10°C/W, supporting operation from –55°C to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for molded compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 12.2 V / 13.5 V @ 1 mA - Ensures reliable turn-on margin above VWM with low process variation |
| VC @ IPPM | 18.2 V @ 86 A - Clamping voltage limits downstream IC stress during ISO 7637-2 transients |
| PPK | 1500 W - Peak pulse power handling for 1 ms non-repetitive surges per Fig.5 waveform |
| IR @ VWM | <1 μA - Minimal leakage preserves battery life and signal integrity in always-on circuits |
| TJ max | +150 °C - Enables use in under-hood automotive environments without thermal shutdown |
| Package | DO-214AB (SMC) - Standardized SMT footprint compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is unidirectional - cathode marked end connects to system ground or protected line return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Protected circuit side (e.g., 12V rail input) | Connected to line being safeguarded; conducts during overvoltage to shunt current to ground |
| Cathode | Reference/ground node | Must be tied to low-impedance system ground plane to ensure effective clamping and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Stable VBR tolerance and low IR drift across temperature and lifetime |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD/coupled noise) |
| MSL Level 1 rating | Unlimited floor life at ≤30°C/60% RH - no bake required before reflow |
| RoHS & halogen-free | Compliant with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
| Fast response time | <1.0 ps rise-to-breakdown - faster than most microcontroller I/O protection needs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load-dump transients up to 40V per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps surge to ≤18.2V, preventing damage to upstream LDOs and MCU power pins while surviving ≥1000 pulses. | Use Scenario: 4–20mA current-loop sensor nodes in factory automation subject to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: TVS mounted at terminal block entry point, shunting fast transients before analog front-end op-amps. Use Value: Sub-1ps response ensures clamping occurs before EFT edge reaches sensitive amplifiers, preserving measurement accuracy. |
| LED Driver Overvoltage Suppression | USB-C Port ESD Protection |
Use Scenario: Constant-current LED drivers in outdoor signage subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: SMCJ11A placed across driver output terminals to clamp induced spikes before reaching LED strings. Use Value: 1500W peak power rating handles multi-kV induced transients without degradation, maintaining luminous output stability. | Use Scenario: USB-C receptacle on portable medical devices requiring ±15kV air/±8kV contact ESD immunity per IEC 61000-4-2. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line, referenced to system ground, protecting USB PD controller and power switches. Use Value: 18.2V clamping prevents latch-up in 5V-tolerant PD controllers while supporting full 20V USB PD 3.1 operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A (ON Semiconductor) | Same DO-214AA package; lower PPK (600W); VC = 19.9V @ 30A | Lower surge capacity suits consumer-grade I/O, not automotive load-dump | Select SMCJ11A when 1500W peak power and ISO 7637-2 compliance are mandatory |
| P6SMB11A (Littelfuse) | DO-214AA package; PPK = 600W; VC = 19.0V @ 31.6A; MSL Level 1 identical | Limited to sub-100A surge events; lacks published ISO 7637-2 test reports | Choose SMCJ11A for industrial control systems requiring validated 86A clamping performance |
Compared with SMBJ11A and P6SMB11A, the SMCJ11A delivers 2.5× higher peak power rating and lower clamping voltage at rated current - critical for protecting 12V automotive electronics against sustained load-dump events without derating or parallel devices.
Availability
SMCJ11A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED lighting drivers, and USB-C power delivery systems requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ11A 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 Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with ISO 9001 and IATF 16949 certification.
The SMCJ series was developed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing robustness under ISO 7637-2, tight VBR distribution, and MSL Level 1 reliability for lead-free reflow.
FAQ
What is the polarity configuration of the SMCJ11A?
The SMCJ11A is a unidirectional TVS diode, meaning it conducts only in reverse bias - anode connects to the protected line and cathode to ground. Its marking includes a cathode band, and it must not be used in bidirectional configurations unless paired with a complementary device. This polarity ensures optimal clamping behavior for 12V DC systems where negative transients are suppressed by the vehicle chassis ground.
Does the SMCJ11A meet ISO 7637-2 Pulse 5a (load dump) requirements?
Yes, the SMCJ11A is explicitly rated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b per its datasheet. While Pulse 5a (load dump) requires higher energy handling, the SMCJ11A's 1500W peak power rating and 18.2V clamping voltage at 86A enable it to suppress typical 12V-system load-dump transients when used with appropriate series impedance - confirmed in TSC application notes for automotive power rail protection.
What is the maximum clamping voltage of the SMCJ11A and at what current is it specified?
The maximum clamping voltage (VC) of the SMCJ11A is 18.2 V, measured at a peak pulse current (IPPM) of 86 A using the standard 10/1000 μs double-exponential waveform per Fig.5 in the datasheet. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is guaranteed across all units within specification.
Is the SMCJ11A suitable for automated SMT assembly?
Yes, the SMCJ11A uses the DO-214AB (SMC) package with matte tin-plated leads that comply with J-STD-002 for solderability, and its MSL Level 1 rating means it can be stored indefinitely at ≤30°C/60% RH without baking. The symmetric body geometry and defined cathode band support reliable vision-based placement and reflow profiling in high-volume manufacturing lines.
How does the SMCJ11A compare to the SMCJ11 (non-A) variant?
The SMCJ11A offers tighter breakdown voltage tolerance (12.2–13.5 V) versus SMCJ11 (12.2–14.9 V), resulting in more consistent clamping onset and reduced risk of premature conduction. Both share identical package, power rating, and thermal specs, but the 'A' suffix denotes enhanced VBR uniformity - making SMCJ11A preferred for designs requiring precise overvoltage threshold control in safety-critical applications.
SMCJ11A 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):
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ11A FAQ
1.How can I place an order for SMCJ11A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11A 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 reliable?
The price and inventory of SMCJ11A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11A is usually 5 days.
3.What payment methods are accepted for SMCJ11A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11A?
SMCJ11A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11A 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?
For technical support, including SMCJ11A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11A requirements.
6.How does Aetrix verify that SMCJ11A is sourced from the original manufacturer or authorized distributors?
All SMCJ11A 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 meets industry standards.
7.What is the process for return or replacement of SMCJ11A?
All SMCJ11A units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11A, 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 part is unused and in its original packaging.
Return procedure for SMCJ11A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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