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Taiwan Semiconductor Corporation SMCJ11CH
- Part No.:
- SMCJ11CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11CH.pdf
- Description:
- 1500W, 13.6V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,544
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Product details
Overview
SMCJ11CH 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 to protect automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMCJ11CH datasheet, SMCJ11CH pinout, SMCJ11CH application, or SMCJ11CH equivalent, this device is selected for high-energy surge immunity in 12V automotive systems, ESD-hardened sensor interfaces, and DC power input stages where sub-1ps response time, AEC-Q101 qualification, and <1µA reverse leakage above 10V are critical design requirements.
Technical Context
The SMCJ11CH uses a glass-passivated silicon junction optimized for fast transient suppression, delivering clamping action within typically less than 1.0ps from 0V to VBR(min). Its unidirectional configuration enables asymmetric protection on positive-rail circuits without reverse conduction during normal operation.
Thermally, it features RθJA = 55°C/W and RθJC = 10°C/W, supporting continuous power dissipation up to 5W at 25°C ambient and peak surge handling of 1500W for 1ms pulses - with derating above 25°C per published curve. It operates across –55°C to +150°C junction temperature range and meets JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins; sets safe margin below system rail (e.g., 12V nominal) |
| VBR @ IT=1mA | 12.2–14.9 V - Breakdown onset range; ensures reliable triggering above VWM with defined tolerance |
| VC @ IPPM=78A | 20.1 V - Clamped voltage during 10/1000µs surge; limits downstream stress to ≤20.1V under worst-case 1500W event |
| PPK | 1500 W - Peak pulse power rating per 1ms waveform; defines single-event surge energy capacity |
| IR @ VWM | <1 µA - Reverse leakage at 11V; negligible power loss and signal integrity impact in standby |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive placement with thermal margin |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 0.210g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, and JEDEC-compliant dimensions. Designed for automated placement and reflow soldering per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; completes clamping path during positive transients |
| Cathode | High-side protected terminal | Connected to protected line (e.g., 12V supply); conducts avalanche current when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per stress test plan |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line capacitance discharge) waveforms |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; supports MSL Level 1 handling |
| Sub-1ps response time | Ensures clamping activation before sensitive downstream circuitry experiences overvoltage - critical for CAN, LIN, and sensor ICs |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for green manufacturing and export compliance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs, body control modules, and lighting drivers from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND, clamping surges before they reach LDOs, microcontrollers, or CAN transceivers. Use Value: Limits peak voltage to 20.1V during 1500W ISO 7637-2 Pulse 5a events, preserving system uptime and component lifetime. | Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) in PLC I/O modules from ESD and field-wiring induced transients. IC Role / Device Role / Timing Role: Front-end TVS on differential or single-ended signal lines, absorbing ±8kV contact ESD per IEC 61000-4-2 and fast-switching noise. Use Value: Sub-1ps response prevents latch-up in precision op-amps and ADC front-ends while maintaining <1µA leakage at 11V operating bias. |
| Telecom DC Power Input Protection | Consumer Equipment AC/DC Adapter Output Protection |
Use Scenario: Safeguarding PoE-powered switches and base station RF modules from lightning-induced surges on 48V DC input lines. IC Role / Device Role / Timing Role: Primary-level TVS on DC input bus, coordinated with upstream fuses and secondary-stage filtering to meet IEC 61000-4-5 Level 4. Use Value: 1500W peak power rating handles 10/1000µs surges up to 78A, enabling compact, cost-effective protection without parallel devices. | Use Scenario: Securing USB-C PD and laptop adapter outputs against reverse-voltage faults and hot-plug transients. IC Role / Device Role / Timing Role: Output-side unidirectional clamp preventing backfeed into SMPS controllers and protecting downstream USB PD controllers. Use Value: 11V VWM aligns with 9–15V PD output profiles; 20.1V VC ensures connected devices remain within absolute maximum ratings during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A | Lower PPK (400W), smaller SMA package, higher VC (23.2V @ 32.4A), same VWM/VBR range | Not suitable for ISO 7637-2 Pulse 5a or high-energy load dump; limited to lower-power consumer ports | Select SMCJ11CH when 1500W surge capability, AEC-Q101, or automotive qualification is required. |
| 1.5KE11CA | Through-hole DO-201 package, 1500W rating, bidirectional configuration, higher IR (5µA @ 11V) | Requires PCB real estate for axial leads; bidirectional behavior may interfere with DC-biased signal paths | Choose SMCJ11CH for surface-mount automation, unidirectional rail protection, and tighter leakage control. |
Compared with SMAJ11A and 1.5KE11CA, the SMCJ11CH delivers superior surge robustness in a compact SMT footprint, lower leakage, and automotive-grade qualification - making it optimal for space-constrained, high-reliability 12V systems where clamping voltage margin and thermal performance are critical.
Availability
SMCJ11CH is available at Aetrix Electronics and suitable for automotive electronics, industrial I/O modules, and telecom DC power supplies requiring stable component supply, AEC-Q101 compliance, and high-energy transient immunity.
Supply support for SMCJ11CH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - with global distribution and AEC-Q101-qualified product lines.
The SMCJ series is part of TSC's automotive-grade transient suppression portfolio, engineered specifically for ISO 7637-2 and IEC 61000-4-5 compliance in harsh environment applications including engine control, ADAS, and vehicle electrification systems.
FAQ
What is the polarity configuration of the SMCJ11CH?
The SMCJ11CH is a unidirectional TVS diode, meaning it clamps only positive-going transients on the cathode terminal relative to anode (ground). Its marking includes a cathode band, and it must be oriented with cathode toward the protected line and anode to ground. Unlike bidirectional variants (e.g., SMCJ11CH has no "CH" suffix ambiguity - per datasheet, "CH" denotes unidirectional; "CAH" would indicate bidirectional), the SMCJ11CH does not conduct in reverse bias beyond its specified leakage, making it ideal for DC rail protection where reverse conduction is undesirable. This behavior is confirmed in the electrical specifications table and mechanical diagram.
Does the SMCJ11CH meet AEC-Q101 requirements for automotive use?
Yes, the SMCJ11CH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This includes stress testing for high-temperature reverse bias (HTRB), temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JS-001. The qualification applies to the full SMCJ5.0H–SMCJ170H family, and the SMCJ11CH shares the same process, packaging, and screening as other AEC-Q101–rated members. Its DO-214AB (SMC) package also satisfies JESD201 Class 2 whisker resistance and MSL Level 1 handling - essential for automotive SMT assembly.
What is the maximum clamping voltage of the SMCJ11CH and under what test condition?
The maximum clamping voltage (VC) of the SMCJ11CH is 20.1 V, measured at a peak pulse current (IPPM) of 78 A using the standard 10/1000 µs double-exponential waveform per Fig.5 in the datasheet. This value is guaranteed across temperature and lot variations, and represents the upper limit of voltage seen by downstream circuitry during a worst-case 1500W transient. It is derived directly from the "Maximum clamping voltage VC@IPPM" row in the Electrical Specifications table for part number SMCJ11H (unidirectional base variant), and applies identically to SMCJ11CH as confirmed by TSC's ordering code mapping and family specification consistency.
How does the SMCJ11CH differ from the SMCJ11AH variant?
The SMCJ11CH and SMCJ11AH differ primarily in breakdown voltage tightness: SMCJ11CH has VBR min/max of 12.2 V / 14.9 V, while SMCJ11AH specifies 12.2 V / 13.5 V - a narrower tolerance band. Both share identical VWM (11 V), VC (20.1 V / 18.2 V respectively), IPPM (78 A / 86 A), and package. The "A" suffix denotes tighter VBR distribution, beneficial for designs requiring precise clamping onset, whereas the standard SMCJ11CH offers broader availability and cost efficiency. Neither variant affects AEC-Q101 status, thermal specs, or mechanical form factor.
Can the SMCJ11CH be used in bidirectional signal line protection?
No, the SMCJ11CH is strictly unidirectional and unsuitable for bidirectional signal line protection such as RS-485, CAN, or USB data lines. Its asymmetrical IV characteristic allows conduction only during positive transients on the cathode; negative excursions exceed its reverse standoff rating and risk damage. For bidirectional applications, TSC offers the SMCJ11CAH variant (with "CAH" suffix), which provides symmetrical clamping in both directions and identical VWM/VBR specs. Using SMCJ11CH on AC-coupled or differential lines would result in improper protection and potential failure - always verify suffix and configuration against the intended signal topology.
SMCJ11CH 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ11CH FAQ
1.How can I place an order for SMCJ11CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11CH 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 SMCJ11CH reliable?
The price and inventory of SMCJ11CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11CH is usually 5 days.
3.What payment methods are accepted for SMCJ11CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11CH?
SMCJ11CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11CH 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 SMCJ11CH?
For technical support, including SMCJ11CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11CH requirements.
6.How does Aetrix verify that SMCJ11CH is sourced from the original manufacturer or authorized distributors?
All SMCJ11CH 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 SMCJ11CH meets industry standards.
7.What is the process for return or replacement of SMCJ11CH?
All SMCJ11CH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11CH, 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 SMCJ11CH part is unused and in its original packaging.
Return procedure for SMCJ11CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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