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Taiwan Semiconductor Corporation SMBJ11CA
- Part No.:
- SMBJ11CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11CA.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,997
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Product details
Overview
SMBJ11CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 11 V working stand-off voltage (VWM), 12.2–14.9 V breakdown voltage (VBR), 20.1 V maximum clamping voltage (VC) at 31 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time - deployed in automotive lighting control modules and industrial I/O interfaces.
For engineers reviewing the SMBJ11CA datasheet, SMBJ11CA pinout, SMBJ11CA application, or SMBJ11CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AA package compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA at 11 V), and thermal performance (RθJA = 55 °C/W).
Technical Context
The SMBJ11CA operates as a silicon avalanche diode configured in a symmetrical bipolar structure, enabling identical clamping behavior in both forward and reverse polarity transients. Its glass-passivated junction ensures stable VBR tolerance and low leakage, while the DO-214AA (SMB) package supports automated placement and meets UL 94V-0 flammability requirements.
It delivers 600 W non-repetitive peak impulse power under 10/1000 µs waveform, with junction temperature range from –55 °C to +150 °C and thermal resistance of 10 °C/W (junction-to-case). The device is rated for electrical fast transient (EFT) immunity and inductive switching load suppression without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous DC or RMS voltage the device blocks without clamping; defines safe operating margin before transient activation. |
| VBR min/max | 12.2 V / 14.9 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering across process variation and temperature. |
| VC @ IPP | 20.1 V @ 31 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| PPK | 600 W - Peak pulse power handling per single transient; enables robust protection against ISO 7637-2 Pulse 5a (load dump) surges. |
| ID @ VWM | <1 µA - Low leakage current at rated stand-off voltage; minimizes standby power loss and avoids false triggering. |
| Response time | <1.0 ps - Sub-nanosecond junction response; ensures clamping initiation before transient energy couples into protected ICs. |
| Package | DO-214AA (SMB) - Standard surface-mount outline with 0.090 g mass, matte tin-plated leads, and JESD201 Class 2 whisker resistance. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; dual axial terminals (anode and cathode) arranged in a symmetrical configuration for bidirectional operation. Polarity is marked by a single band indicating the cathode side for unidirectional variants; SMBJ11CA uses symmetric marking (no band) or center-band convention per Taiwan Semiconductor's bipolar marking diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional reference) | One side of symmetrical PN junction; functions as anode in negative transients and cathode in positive transients. |
| Terminal 2 | Cathode (bidirectional reference) | Other side of symmetrical PN junction; functions as cathode in negative transients and anode in positive transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR (12.2–14.9 V) and VC (20.1 V) in both polarities - eliminates need for polarity-aware layout in AC-coupled or floating systems. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery line transients), and Pulse 3a/3b (EFT) - meets automotive OEM EMC requirements. |
| Glass passivated junction | Stable VBR tolerance and <1 µA ID at VWM across –55 °C to +150 °C - ensures consistent clamping over full industrial temperature range. |
| Automated placement ready | DO-214AA footprint with J-STD-002 solderable matte tin leads and moisture sensitivity level 1 - supports high-yield SMT assembly without baking. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - satisfies environmental compliance for global industrial and automotive shipments. |
Applications
| Automotive Lighting Control | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontroller GPIOs from load-dump surges and relay coil flyback in headlamp modules. IC Role / Device Role: Primary bidirectional clamping element placed across 12 V supply rail and signal lines. Use Value: Limits transient voltage to ≤20.1 V during 31 A ISO 7637-2 Pulse 5a events, preventing latch-up or gate oxide damage in 3.3 V/5 V logic. |
Use Scenario: Safeguarding 24 V digital input circuits in programmable logic controllers exposed to inductive switching noise from solenoids and contactors. IC Role / Device Role: Rail-to-rail TVS shunt connected between field-side input and common return. Use Value: Clamps EFT bursts (IEC 61000-4-4) to <20.1 V within <1 ps, maintaining signal integrity and avoiding false edge detection. |
| USB-C Power Delivery Port | Smart Meter Communication Interface |
Use Scenario: Secondary-level surge protection on VBUS line of USB-C receptacles subjected to hot-plug transients and system-level ESD. IC Role / Device Role: Bidirectional clamp between VBUS and ground, upstream of buck converter input filter. Use Value: Withstands 600 W peak pulses while adding only 15 pF typical junction capacitance - no signal integrity impact on 10 Gbps USB3.2 Gen2x2 lanes. |
Use Scenario: Protecting RS-485 transceivers and microcontroller UART pins in utility smart meters installed in electrically noisy substations. IC Role / Device Role: Line-to-line and line-to-ground TVS on differential bus pair and control signal lines. Use Value: Maintains <1 µA leakage at 11 V stand-off, ensuring battery-backed real-time clock operation remains unaffected during long-term deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ11CA | Same DO-214AA package, identical VWM (11 V), but higher VC = 21.2 V @ 30.1 A; RθJA = 60 °C/W vs. 55 °C/W. | Slightly higher clamping voltage reduces margin for 12 V rail protection; lower thermal efficiency may limit sustained surge duty cycle. | Acceptable where 1.1 V higher VC is tolerable and thermal derating is managed via board copper area. |
| ON Semiconductor SMCJ11CA | DO-214AB (SMC) package (larger footprint), same VWM/VBR/VC specs, but higher PPK = 1500 W and IPP = 71.5 A. | Requires PCB layout change; suited for higher-energy threats (e.g., ISO 16750-2 Load Dump) where SMBJ11CA's 600 W is marginal. | Select when system-level testing reveals insufficient margin with 600 W rating; not drop-in due to larger SMC package. |
Compared with SMAJ11CA, SMBJ11CA offers tighter clamping (20.1 V vs. 21.2 V) and better thermal dissipation, making it preferable for space-constrained 12 V automotive modules; versus SMCJ11CA, it trades peak power headroom for smaller DO-214AA footprint - ideal for dense industrial I/O cards.
Availability
SMBJ11CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC digital I/O, and smart meter communication interface designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ11CA 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 SMBJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing ISO 7637-2 compliance, tight VBR tolerance, and automated assembly readiness in DO-214AA packaging.
FAQ
What is the polarity configuration of SMBJ11CA?
SMBJ11CA is a bidirectional TVS diode with symmetrical avalanche characteristics in both polarities. Unlike unidirectional variants (e.g., SMBJ11A), it has no cathode band marking and provides identical breakdown (12.2–14.9 V) and clamping (20.1 V) behavior for positive and negative transients - essential for AC-coupled or floating signal line protection where polarity is undefined.
Does SMBJ11CA meet automotive EMC standards?
Yes, SMBJ11CA is explicitly validated to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery line transients), and Pulse 3a/3b (electrical fast transients). Its <1.0 ps response time and 600 W peak power rating ensure compliance in 12 V vehicle subsystems such as body control modules and lighting drivers.
What is the maximum clamping voltage of SMBJ11CA under surge conditions?
The maximum clamping voltage (VC) of SMBJ11CA is 20.1 V when subjected to a 10/1000 µs surge current of 31 A. This value is measured per ANSI/IEEE C62.35 and represents the peak voltage seen across the device during standardized transient events - critical for ensuring downstream 12 V-rated ICs remain within absolute maximum ratings.
Can SMBJ11CA be used in place of a unidirectional TVS like SMBJ11A?
No - SMBJ11CA and SMBJ11A are not interchangeable without circuit review. SMBJ11A is unidirectional (cathode-banded) with forward conduction capability, while SMBJ11CA is bidirectional and blocks in both directions. Replacing SMBJ11A with SMBJ11CA on a DC rail with defined polarity may cause unintended conduction or reduced clamping margin depending on biasing.
What is the junction-to-ambient thermal resistance (RθJA) of SMBJ11CA?
The junction-to-ambient thermal resistance (RθJA) of SMBJ11CA is 55 °C/W, measured under standard JEDEC test conditions (single device on 1-inch² FR-4 board with 2 oz copper). This value governs temperature rise during repetitive surge events and must be considered alongside its 150 °C max junction temperature when designing for high-duty-cycle applications like motor drive feedback lines.
SMBJ11CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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):
- 33A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
SMBJ11CA FAQ
1.How can I place an order for SMBJ11CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11CA 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 SMBJ11CA reliable?
The price and inventory of SMBJ11CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11CA is usually 5 days.
3.What payment methods are accepted for SMBJ11CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11CA?
SMBJ11CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11CA 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 SMBJ11CA?
For technical support, including SMBJ11CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11CA requirements.
6.How does Aetrix verify that SMBJ11CA is sourced from the original manufacturer or authorized distributors?
All SMBJ11CA 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 SMBJ11CA meets industry standards.
7.What is the process for return or replacement of SMBJ11CA?
All SMBJ11CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11CA, 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 SMBJ11CA part is unused and in its original packaging.
Return procedure for SMBJ11CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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