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Taiwan Semiconductor Corporation SMCJ11C
- Part No.:
- SMCJ11C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11C.pdf
- Description:
- 1500W, 13.6V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,010
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Product details
Overview
SMCJ11C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 11V working stand-off voltage (VWM), 12.2–14.9V breakdown voltage (VBR), and 20.1V maximum clamping voltage (VC) at 1A peak pulse current - designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ11C datasheet, SMCJ11C pinout, SMCJ11C application, or SMCJ11C 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 12V battery-fed systems.
Technical Context
The SMCJ11C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (12.2–14.9V @ IT = 1mA). It clamps transients to ≤20.1V at IPPM = 1A using a glass-passivated silicon junction, achieving sub-1ps response time from 0V to VBR min.
Its thermal design supports continuous operation up to TJ = 150°C, with RθJA = 55°C/W and RθJC = 10°C/W. The device 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 DC or continuous reverse operating voltage before conduction begins |
| VBR min/max | 12.2 V / 14.9 V @ IT = 1 mA - Ensures reliable turn-on within defined tolerance band under standardized test conditions |
| VC @ IPPM | 20.1 V @ 1 A - Peak clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500 W - Peak pulse power handling per single 1ms non-repetitive transient per Fig.5 |
| IR @ VWM | <1 μA - Minimal leakage at rated stand-off, critical for low-power standby circuits |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 0.210g mass and matte tin-plated leads |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with cathode band marking; terminals are matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance; polarity is marked by cathode band for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 12V rail); conducts avalanche current to ground during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD/coupled noise) |
| Sub-1ps response time | Enables clamping before sensitive logic or analog circuitry experiences damaging overvoltage |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking, simplifying SMT manufacturing flow |
| Glass passivated junction | Improves long-term reliability and stability of VBR and leakage under thermal cycling and humidity stress |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12V battery-fed ECU power input subjected to load-dump pulses up to 35V per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VIN and GND to clamp surges before DC/DC converter input stage. Use Value: Limits transient voltage to ≤20.1V, protecting 36V-rated input capacitors and enabling use of cost-optimized 24V-input regulators. | Use Scenario: 24V digital input module exposed to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Standoff protector on field-side signal line, absorbing energy from 200A IFSM-rated inductive spikes. Use Value: Withstands 1500W peak pulse without degradation, eliminating need for external series impedance or RC snubbers. |
| LED Driver Overvoltage Clamp | Telecom Line Card Surge Suppression |
Use Scenario: Constant-current LED driver board powered from 12V supply in commercial lighting fixture. IC Role / Device Role / Timing Role: Primary transient shunt on main power rail, activated within <1ps to prevent MOSFET gate oxide rupture. Use Value: Clamps 10/1000μs transients to 20.1V, maintaining safe VGS margin for 30V-rated driver FETs. | Use Scenario: Low-voltage control interface on telecom line card connected to external wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional-capable variant (SMCJ11CA) used in differential pair protection; SMCJ11C serves as unidirectional rail clamp. Use Value: Delivers 1500W surge immunity while maintaining <1μA leakage at 11V, preserving signal integrity in always-on monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | 600W PPK rating, SMB package (smaller footprint), VBR = 12.2–13.5V, VC = 18.2V @ 1A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load-dump | Select when space-constrained PCB layout prioritizes size over 1500W surge capacity |
| 1.5KE11A | Through-hole DO-201 package, same 1500W rating, VBR = 12.2–13.5V, VC = 18.2V @ 1A, higher RθJA (~65°C/W) | Requires wave soldering; incompatible with fully SMT production lines | Select only for legacy through-hole designs or prototyping where rework flexibility outweighs automation needs |
Compared with SMBJ11A and 1.5KE11A, the SMCJ11C uniquely combines 1500W surge capability, DO-214AB SMT compatibility, MSL Level 1 handling, and ISO 7637-2 validation - making it optimal for high-reliability automotive and industrial SMT assemblies requiring robust, automated, and standards-compliant transient protection.
Availability
SMCJ11C is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, LED driver modules, and telecom line cards requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMCJ11C 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMCJ series was developed specifically for high-energy transient suppression in 12V/24V automotive and heavy-industrial systems, emphasizing ISO 7637-2 compliance, automated assembly readiness, and long-term parametric stability.
FAQ
What is the clamping voltage of SMCJ11C and how is it measured?
The SMCJ11C has a maximum clamping voltage (VC) of 20.1 V at a peak pulse current (IPPM) of 1 A, measured under the 10/1000 μs double-exponential waveform defined in Fig.5 of the datasheet. This value represents the upper limit of voltage seen by downstream circuitry during a standardized surge event, ensuring protection of 24V-rated components on the same rail.
Is SMCJ11C unidirectional or bidirectional, and how does that affect circuit placement?
The SMCJ11C is a unidirectional TVS diode, indicated by the "C" suffix and cathode band marking. It must be placed with cathode toward the protected line and anode to ground - conducting only during reverse overvoltage. For bidirectional protection, the SMCJ11CA variant is required, which clamps symmetrically in both polarities.
Does SMCJ11C meet automotive transient immunity standards?
Yes, the SMCJ11C meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection and coupling), and Pulse 3a/3b (capacitive coupled transients). Its 1500W peak power rating and fast response (<1ps) enable compliance with these test profiles when correctly applied in series with appropriate line impedance.
What is the thermal resistance profile of SMCJ11C and how does it impact PCB layout?
The SMCJ11C has RθJA = 55°C/W and RθJC = 10°C/W. To maintain TJ ≤ 150°C under full 1500W surge, PCB copper area must provide sufficient heat spreading - typically ≥100 mm² of 2 oz copper connected to both terminals. Thermal vias under the pad improve conduction but do not replace adequate copper area.
Can SMCJ11C be used in place of SMCJ11A, and what is the key difference?
No - SMCJ11C and SMCJ11A are distinct variants: SMCJ11C has VBR = 12.2–14.9 V and VC = 20.1 V, while SMCJ11A has tighter VBR = 12.2–13.5 V and lower VC = 18.2 V. The "A" suffix denotes enhanced VBR tolerance and lower clamping, making SMCJ11A preferable where stricter voltage control is needed, but SMCJ11C offers higher surge margin in less tightly regulated systems.
SMCJ11C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- 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:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 78A
- 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)
SMCJ11C FAQ
1.How can I place an order for SMCJ11C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11C 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 SMCJ11C reliable?
The price and inventory of SMCJ11C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11C is usually 5 days.
3.What payment methods are accepted for SMCJ11C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11C?
SMCJ11C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11C 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 SMCJ11C?
For technical support, including SMCJ11C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11C requirements.
6.How does Aetrix verify that SMCJ11C is sourced from the original manufacturer or authorized distributors?
All SMCJ11C 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 SMCJ11C meets industry standards.
7.What is the process for return or replacement of SMCJ11C?
All SMCJ11C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11C, 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 SMCJ11C part is unused and in its original packaging.
Return procedure for SMCJ11C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11C Tags
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