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Taiwan Semiconductor Corporation SMCJ11
- Part No.:
- SMCJ11
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11.pdf
- Description:
- 1500W, 13.6V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMCJ11 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), 12.2–14.9V breakdown voltage (VBR), and 20.1V maximum clamping voltage (VC) at 78A peak pulse current-designed for automotive load-dump and inductive switching protection in power supply rails.
For engineers reviewing the SMCJ11 datasheet, SMCJ11 pinout, SMCJ11 application, or SMCJ11 equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature limits up to +150°C, and compatibility with automated SMT placement on high-reliability industrial and automotive PCBs.
Technical Context
The SMCJ11 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (12.2–14.9V @ 1mA), clamping transients to ≤20.1V at 78A (10/1000μs waveform). Its glass-passivated junction ensures stable breakdown and low leakage (<1μA @ 11V).
Thermal design relies on RθJA = 55°C/W and RθJC = 10°C/W, enabling sustained operation up to TJ = +150°C. 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 / 14.9 V @ 1 mA - Confirmed avalanche onset range defining turn-on threshold |
| VC @ IPPM | 20.1 V @ 78 A - Clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500 W - Peak pulse power handling per single non-repetitive event (1 ms) |
| IR @ VWM | <1 μA - Negligible leakage current at rated stand-off, preserving system quiescent power |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 0.210 g mass and matte tin-plated leads |
Pinout & Package
DO-214AB (SMC) package: cathode-banded lead configuration; anode and cathode terminals defined by molded band marking; body dimensions conform to JEDEC DO-214AB standard; suitable for reflow soldering per J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded lead) | Current entry point in forward bias; connected to ground or low-side reference | Provides return path during clamping; must be routed with low-inductance trace to minimize overshoot |
| Cathode (banded lead) | Transient voltage sensing and clamping node | Connected to protected line (e.g., 12V rail); conducts avalanche current to anode when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Fast response time | <1.0 ps from 0 V to VBR min - Enables suppression before sensitive logic or analog circuitry is damaged |
| Glass passivated junction | Stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| RoHS & halogen-free | Complies with 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 spikes up to 40V per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between rail and chassis ground, clamping transients within 20.1V to protect DC-DC controllers and microcontrollers. Use Value: Limits voltage excursion below 22V, preventing latch-up or gate oxide damage in 3.3V/5V logic powered from same rail. | Use Scenario: 24V digital input module exposed to relay-coil flyback and EFT bursts in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff protector on field-side signal line, shunting energy before optocoupler input stage. Use Value: Withstands ≥78A surge without degradation, maintaining <1μA leakage to preserve input hysteresis thresholds. |
| LED Driver Overvoltage Clamp | ESD-Sensitive Sensor Interface |
Use Scenario: Constant-current LED driver IC with external MOSFET switch experiencing inductive kick during PWM turn-off. IC Role / Device Role / Timing Role: Parallel-connected TVS across drain-source, clamping VDS spike to 20.1V during 10/1000μs events. Use Value: Prevents MOSFET avalanche failure and maintains driver IC integrity without derating output current. | Use Scenario: Automotive ambient light sensor (ALS) interface line routed near high-current harnesses in dashboard assembly. IC Role / Device Role / Timing Role: First-line defense against coupled transients entering analog front-end amplifier inputs. Use Value: Sub-1ps response ensures clamping occurs before 100ns ESD pulse reaches op-amp input stage, avoiding latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | 600W PPK rating, lower VC (18.2V @ 86A), same VWM/VBR range, SMB package (smaller footprint) | Lower power handling limits use in high-energy automotive load-dump scenarios; better suited for board-level ESD | Select SMBJ11A only if system-level surge energy is confirmed ≤600W and space-constrained layout prohibits SMC footprint |
| 1.5KE11A | Through-hole DO-201 package, 1500W PPK, higher IR (≤5μA), slower thermal response due to larger junction-to-ambient resistance | Not compatible with automated SMT lines; requires wave soldering or hand assembly; less suitable for high-density automotive modules | Choose 1.5KE11A only for legacy through-hole designs or prototyping where rework flexibility outweighs production efficiency |
Compared with SMBJ11A and 1.5KE11A, the SMCJ11 delivers identical voltage ratings in a surface-mount DO-214AB package optimized for 1500W surge immunity, automated placement, and automotive-grade thermal robustness-making it the preferred choice for new SMT-based power rail protection designs.
Availability
SMCJ11 is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, LED lighting drivers, and sensor interface circuits requiring stable component supply and full ISO 7637-2 compliance.
Supply support for SMCJ11 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The SMCJ series is part of TSC's high-power transient suppression product line, engineered specifically for robust, surface-mount protection of 12V/24V systems against ISO 7637-2 and IEC 61000-4-4 threats.
FAQ
What is the polarity configuration of the SMCJ11?
The SMCJ11 is a unidirectional TVS diode, with cathode identified by a molded band on the DO-214AB package. It conducts only during reverse overvoltage events-forward bias behaves like a standard silicon diode with VF ≈ 3.5V at 100A. This polarity enables precise rail-to-ground clamping in DC power systems without interfering with normal forward operation of the SMCJ11.
Does the SMCJ11 meet automotive transient immunity standards?
Yes, the SMCJ11 is explicitly validated to meet ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) test profiles. Its 1500W peak power rating, sub-1ps response, and clamping voltage of 20.1V at 78A ensure compliance in 12V automotive subsystems-confirmed in Taiwan Semiconductor's official S2104 datasheet for the SMCJ11.
What is the maximum clamping voltage of the SMCJ11 under surge conditions?
The SMCJ11 has a maximum clamping voltage (VC) of 20.1V at 78A peak pulse current (IPPM), tested with the standardized 10/1000μs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events-critical for ensuring downstream ICs remain within absolute maximum ratings.
Can the SMCJ11 be used in bidirectional configurations?
No-the SMCJ11 is unidirectional only. For bidirectional protection, Taiwan Semiconductor specifies the SMCJ11CA variant (with "CA" suffix), which features symmetrical breakdown in both polarities. Using the SMCJ11 in reverse-biased AC or floating applications risks permanent failure, as its forward conduction characteristic is not designed for repetitive reverse blocking beyond VWM = 11V.
What is the thermal resistance profile of the SMCJ11?
The SMCJ11 has a junction-to-ambient thermal resistance (RθJA) of 55°C/W and junction-to-case resistance (RθJC) of 10°C/W, measured under standard JEDEC test conditions. These values enable reliable operation up to +150°C junction temperature when mounted on 1-in² 2-oz copper with two thermal vias-essential for sustaining repeated surges in engine-control or power-distribution modules where ambient temperatures exceed 105°C.
SMCJ11 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ11 FAQ
1.How can I place an order for SMCJ11 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11 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 SMCJ11 reliable?
The price and inventory of SMCJ11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11 is usually 5 days.
3.What payment methods are accepted for SMCJ11?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11?
SMCJ11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11 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 SMCJ11?
For technical support, including SMCJ11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11 requirements.
6.How does Aetrix verify that SMCJ11 is sourced from the original manufacturer or authorized distributors?
All SMCJ11 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 SMCJ11 meets industry standards.
7.What is the process for return or replacement of SMCJ11?
All SMCJ11 units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11, 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 SMCJ11 part is unused and in its original packaging.
Return procedure for SMCJ11:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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