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Taiwan Semiconductor Corporation SMCJ11CAH
- Part No.:
- SMCJ11CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11CAH.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,225
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Product details
Overview
SMCJ11CAH from Taiwan Semiconductor is a bidirectional 1500W 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 impulse current. It provides AEC-Q101 qualification and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMCJ11CAH datasheet, SMCJ11CAH pinout, SMCJ11CAH application, or SMCJ11CAH equivalent, this device is selected for robust overvoltage immunity in 12V automotive power rails, industrial I/O interfaces, and telecom line protection where fast response (<1.0ps), low leakage (<1µA @ 11V), and bidirectional surge handling are critical.
Technical Context
The SMCJ11CAH is a glass-passivated, bipolar junction TVS diode designed for unidirectional or bidirectional transient suppression without polarity dependency. Its clamping behavior is defined by a 10/1000µs waveform per REA standards, with thermal resistance RθJC = 10°C/W enabling reliable power dissipation under repetitive surges.
It operates across -55°C to +150°C junction temperature range and features moisture sensitivity level 1 (J-STD-020), matte tin-plated leads compliant with J-STD-002, and UL 94V-0 molding compound - all supporting automated SMT placement and automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 12.2 V / 13.5 V - Breakdown occurs within this range at 1 mA test current, ensuring predictable turn-on |
| VC @ IPPM | 18.2 V - Clamps transients to ≤18.2 V at 86 A peak pulse, limiting downstream stress |
| PPK | 1500 W - Peak pulse power rating for 1 ms, defining single-event surge capacity |
| IR @ VWM | <1 µA - Negligible leakage at rated stand-off, preserving signal integrity and low-power operation |
| Package | DO-214AB (SMC) - Surface-mount outline with 7.11 mm x 6.22 mm footprint and 2.3 mm height |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-ambient industrial settings |
Pinout & Package
DO-214AB (SMC) package: surface-mount, molded plastic case with cathode band marking; polarity-indifferent for bidirectional operation (CAH suffix denotes bipolar configuration); terminals are matte tin-plated leads suitable for reflow soldering per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Bidirectional terminal pair | No functional polarity - either lead serves as anode or cathode depending on transient direction; cathode band is non-functional but retained for legacy marking consistency |
| Case (body) | Non-electrical mechanical interface | Provides thermal path to PCB copper; no internal connection - not a ground or heat sink terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-coupled noise) without degradation |
| Fast response time | <1.0 ps rise time from 0 V to VBR min ensures clamping activation before sensitive circuitry experiences overvoltage |
| Low IR at VWM | <1 µA leakage at 11 V minimizes standby current draw and avoids false triggering in high-impedance monitoring circuits |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Power Rail Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12V battery-supplied ECUs, body control modules, and lighting drivers against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly across power input pins to shunt energy into ground during ISO 7637-2 Pulse 1 events. Use Value: Limits voltage excursion to ≤18.2 V during 86 A surges, preventing damage to 24 V-rated regulators and CAN transceivers downstream. | Use Scenario: Safeguarding PLC digital input channels connected to field sensors exposed to inductive switching noise and ESD. IC Role / Device Role / Timing Role: Standoff protector between field wiring and optocoupler/signal conditioning IC, absorbing ±1 kV ESD per IEC 61000-4-2. Use Value: Sub-1 ps response ensures clamping initiates before 10 ns rise-time transients propagate into microcontroller GPIOs. |
| Telecom Line Interface | Consumer Equipment DC Input |
Use Scenario: Shielding Ethernet PHY power pins and RS-485 bus lines from lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V/5 V bias rails feeding communication ICs, coordinated with secondary GDT or MOV stages. Use Value: 1500 W PPK rating supports coordination with upstream protectors while maintaining low clamping voltage for IC-level safety. | Use Scenario: Securing USB-C PD input stages and auxiliary 12 V DC jacks in smart home hubs and audio amplifiers. IC Role / Device Role / Timing Role: Final-stage transient limiter after fuse and common-mode choke, placed adjacent to input capacitor. Use Value: DO-214AB footprint allows compact layout; 11 V VWM matches nominal 12 V supply while avoiding false triggering during brownout 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 |
|---|---|---|---|
| SMBJ11CA | 600 W PPK rating, same VWM/VBR/VC specs, SMB package (smaller footprint, lower thermal mass) | Lower surge capacity suits consumer-grade 12 V inputs; less suited for automotive load dump | Select SMBJ11CA when board space is constrained and peak surge energy is ≤600 W |
| 1.5KE11CA | Through-hole DO-201 package, 1500 W PPK, identical electrical specs but slower thermal response and higher mounting inductance | Preferred for prototyping or legacy through-hole designs; unsuitable for high-frequency transient suppression | Choose 1.5KE11CA only for manual assembly or where SMT infrastructure is unavailable |
Compared with SMBJ11CA and 1.5KE11CA, the SMCJ11CAH delivers identical clamping performance with superior thermal dissipation (RθJC = 10°C/W vs. ~15°C/W for SMBJ, ~30°C/W for 1.5KE) and AEC-Q101 validation - making it the preferred choice for production automotive and industrial SMT assemblies requiring repeatable surge endurance.
Availability
SMCJ11CAH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom line interface cards, and consumer DC power input protection requiring stable component supply and full traceability.
Supply support for SMCJ11CAH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices.
The SMCJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust SMT manufacturability.
FAQ
What does the 'CAH' suffix indicate in SMCJ11CAH?
The 'CAH' suffix in SMCJ11CAH denotes a bidirectional configuration with AEC-Q101 qualification and halogen-free construction. 'C' specifies bidirectional operation (versus 'H' for unidirectional), 'A' indicates tightened VBR tolerance (±5% vs. ±10% for standard 'H'), and 'H' confirms high-reliability processing and RoHS/halogen-free compliance per IEC 61249-2-21. This makes SMCJ11CAH suitable for automotive and industrial applications demanding consistent bipolar clamping and environmental compliance.
Does SMCJ11CAH require heatsinking in typical applications?
No, SMCJ11CAH does not require external heatsinking in standard single-pulse or low-duty-cycle surge conditions due to its low thermal resistance (RθJC = 10°C/W) and DO-214AB package design optimized for PCB copper thermal spreading. For repetitive surge events exceeding 1 Hz, thermal relief via ≥1 cm² of 2 oz copper connected to both terminals is recommended to maintain TJ ≤150°C. The SMCJ11CAH datasheet provides derating curves (Fig.2) to guide layout-based thermal management.
How does SMCJ11CAH differ from SMCJ11AH?
SMCJ11CAH is bidirectional (CAH), while SMCJ11AH is unidirectional (AH). Both share identical VWM (11 V), VBR (12.2–13.5 V), and VC (18.2 V), but SMCJ11AH has a cathode band indicating polarity and conducts forward current only in one direction. SMCJ11CAH suppresses transients equally in both directions - essential for AC-coupled lines or systems where voltage polarity reversal may occur. The SMCJ11CAH marking code is GDZ, distinct from SMCJ11AH's GDZ (same code used; actual polarity determined by suffix).
Can SMCJ11CAH be used in place of a unidirectional TVS like SMCJ11H?
Yes, SMCJ11CAH can replace unidirectional SMCJ11H in most applications, but with trade-offs: it provides symmetrical clamping for bidirectional threats but lacks forward conduction capability - meaning it cannot pass DC current like a unidirectional diode would in certain biasing schemes. In pure transient suppression roles (e.g., across power rails or data lines), SMCJ11CAH offers broader protection coverage. However, if the circuit relies on forward conduction for biasing or sensing, SMCJ11H remains necessary. Always verify system polarity behavior before substitution.
What is the maximum number of SMCJ11CAH devices that can be paralleled for higher surge capacity?
Paralleling SMCJ11CAH devices is not recommended due to mismatch in VBR (12.2–13.5 V) causing uneven current sharing - one device may clamp first and absorb >80% of the surge, leading to premature failure. For higher surge ratings, select a single higher-rated device (e.g., SMCJ15CAH for 1500 W at 15 V VWM) or implement staged protection with upstream GDT/MOV. If parallel use is unavoidable, include matched-ballast resistors (≤0.1 Ω) in series with each SMCJ11CAH to force current balance - though this degrades clamping performance and is not validated in the SMCJ11CAH datasheet.
SMCJ11CAH 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:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 86A
- 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)
SMCJ11CAH FAQ
1.How can I place an order for SMCJ11CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11CAH 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 SMCJ11CAH reliable?
The price and inventory of SMCJ11CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11CAH is usually 5 days.
3.What payment methods are accepted for SMCJ11CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11CAH?
SMCJ11CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11CAH 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 SMCJ11CAH?
For technical support, including SMCJ11CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11CAH requirements.
6.How does Aetrix verify that SMCJ11CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ11CAH 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 SMCJ11CAH meets industry standards.
7.What is the process for return or replacement of SMCJ11CAH?
All SMCJ11CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11CAH, 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 SMCJ11CAH part is unused and in its original packaging.
Return procedure for SMCJ11CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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