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Alpha & Omega Semiconductor Inc. SMDJ11CA
- Part No.:
- SMDJ11CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ11CA.pdf
- Description:
- 1CH 11V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:5,800
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Product details
Overview
SMDJ11CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy surge protection in DC power lines and signal interfaces. It features 11.0 V reverse stand-off voltage (VRWM), 12.2–13.5 V breakdown voltage (VBR @ 1 mA), 18.2 V maximum clamping voltage (VC) at 164.9 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform.
For engineers reviewing the SMDJ11CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low leakage (≤2.0 µA @ VRWM), fast response time (<1.0 ps), thermal resistance (RθJA = 75 °C/W), and compliance with JEDEC DO-214AB mechanical standards.
Technical Context
The SMDJ11CA operates as a voltage-clamped overvoltage protection device using an avalanche junction structure. Its bi-directional configuration enables symmetrical clamping in AC-coupled or floating bus applications without polarity constraints, and its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Designed for surface-mount implementation on 8.0 mm × 8.0 mm copper pads per terminal, the device delivers 3000 W peak pulse power dissipation with 0.01% duty cycle limitation and meets MSL Level 1 per J-STD-020 (260 °C reflow peak). Thermal performance is characterized by RθJL = 15 °C/W and TJ max = +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 11.0 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 12.2 V / 13.5 V @ 1 mA - Confirmed avalanche onset range ensuring predictable turn-on margin |
| VC @ IPPM | 18.2 V @ 164.9 A - Clamped voltage during 10/1000 µs surge, limiting downstream component stress |
| PPPM | 3000 W - Peak pulse power handling on standardized 10/1000 µs waveform |
| IR @ VRWM | ≤2.0 µA - Low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - Maximum junction temperature enabling operation in industrial ambient environments |
| RθJA | 75 °C/W - Thermal resistance defining power derating above 25 °C ambient |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and matte tin lead-free plating; terminals are solderable per MIL-STD-750 Method 2026. Polarity for bi-directional types like SMDJ11CA is non-polar - no cathode band marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive half-cycle) | One end of symmetrical avalanche junction; accepts transient energy in either direction |
| Cathode | Surge current exit (negative half-cycle) | Other end of symmetrical junction; completes bidirectional conduction path with Anode |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and reduced parameter drift over temperature and lifetime |
| Built-in strain relief | Minimizes mechanical stress at lead-to-body interface during thermal cycling or board flexure |
| Fast response time | <1.0 ps - Limits voltage overshoot before clamping engages, protecting sensitive ICs |
| UL 94V-0 flammability rating | Confirms self-extinguishing behavior of plastic package under fault-induced heating |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without pre-bake, reducing manufacturing complexity |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 12 V CAN bus transceivers and microcontroller I/O against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential bus lines to limit common-mode surges to safe levels. Use Value: Clamps 10/1000 µs transients to ≤18.2 V while sustaining 164.9 A peak current, preventing transceiver latch-up or ESD cell damage. | Use Scenario: Input protection for DC-DC converters powering infotainment systems exposed to ISO 7637-2 Pulse 5a (load dump). IC Role / Device Role / Timing Role: Primary surge suppression device at converter input, absorbing up to 3000 W of transient energy. Use Value: Withstands 300 A peak forward surge (IFSM) and maintains ≤2.0 µA leakage at 11 V, preserving converter efficiency and startup reliability. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Overvoltage protection on -48 V telecom rectifier outputs subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bi-directional TVS placed between output rail and ground to clamp both positive and negative polarity transients. Use Value: Symmetrical clamping ensures equal protection for negative-rail systems without polarity reversal concerns or additional components. | Use Scenario: DC link surge protection in solar string inverters where PV arrays generate high-voltage transients during rapid cloud cover changes. IC Role / Device Role / Timing Role: High-power transient suppressor mounted directly at DC bus terminals to shunt surge current before reaching IGBT gate drivers. Use Value: 75 °C/W thermal resistance and +150 °C TJ max enable reliable operation in enclosed outdoor enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC11CA (Littelfuse) | Same VRWM (11 V), slightly higher VC (19.0 V @ 160 A), identical DO-214AB package | Higher clamping voltage reduces protection margin for low-voltage logic; suitable where layout allows minor voltage headroom | Select when UL 94V-0 and MSL1 compliance are required but AOS supply chain constraints exist |
| 1.5KE11CA (ON Semiconductor) | Through-hole DO-201 package, same electrical specs, lower PPPM (1500 W), higher RθJA (~100 °C/W) | Not surface-mount compatible; requires PCB redesign and lacks strain relief or low-profile form factor | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not needed |
Compared with SAC11CA and 1.5KE11CA, the SMDJ11CA offers superior thermal performance (RθJA = 75 °C/W vs. ~100 °C/W), true SMT compatibility with MSL1 reflow support, and tighter VBR tolerance - making it optimal for space-constrained, high-reliability industrial and automotive PCBs.
Availability
SMDJ11CA is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, RoHS-compliant packaging, and consistent surge immunity performance across production batches.
Supply support for SMDJ11CA 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for high-efficiency power conversion and protection.
The SMDJ series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom applications where reliability, compactness, and JEDEC-standard packaging are critical.
FAQ
What is the clamping voltage of the SMDJ11CA under a 10/1000 µs surge?
The SMDJ11CA has a maximum clamping voltage (VC) of 18.2 V at 164.9 A peak pulse current on a 10/1000 µs waveform. This value is measured per industry-standard test conditions and defines the upper voltage limit imposed on protected circuitry during surge events, ensuring downstream components remain within safe operating limits.
Is the SMDJ11CA unidirectional or bidirectional?
The SMDJ11CA is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping for both positive- and negative-polarity transients without requiring polarity-aware placement, making it ideal for AC-coupled interfaces, floating buses, and dual-rail systems where voltage polarity may reverse.
Does the SMDJ11CA meet lead-free and RoHS requirements?
Yes, the SMDJ11CA is a green product per AOS policy: it is lead-free, RoHS compliant, and halogen-free. The matte tin lead finish meets JEDEC J-STD-020 MSL Level 1 specifications, allowing standard SMT reflow without pre-baking and supporting environmentally regulated production programs.
What is the maximum junction temperature rating for the SMDJ11CA?
The SMDJ11CA has a maximum junction temperature (TJ max) of +150 °C, verified per AOS datasheet Rev. 1.2. This rating supports operation in harsh environments such as engine compartments, industrial enclosures, and solar inverter housings where ambient temperatures exceed 85 °C and sustained power dissipation must be carefully managed.
How does the SMDJ11CA compare to the SMDJ11A variant?
The SMDJ11CA differs from SMDJ11A solely in polarity: SMDJ11CA is bidirectional, while SMDJ11A is unidirectional. Both share identical VRWM (11.0 V), VBR (12.2–13.5 V), VC (18.2 V), and PPPM (3000 W) ratings. The CA version eliminates polarity marking and enables use in AC or floating circuits where directionality is undefined or variable.
SMDJ11CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- 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):
- 164.9A
- Power - Peak Pulse:
- 3000W (3kW)
- 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
SMDJ11CA FAQ
1.How can I place an order for SMDJ11CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ11CA 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 SMDJ11CA reliable?
The price and inventory of SMDJ11CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ11CA is usually 5 days.
3.What payment methods are accepted for SMDJ11CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ11CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ11CA?
SMDJ11CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ11CA 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 SMDJ11CA?
For technical support, including SMDJ11CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ11CA requirements.
6.How does Aetrix verify that SMDJ11CA is sourced from the original manufacturer or authorized distributors?
All SMDJ11CA 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 SMDJ11CA meets industry standards.
7.What is the process for return or replacement of SMDJ11CA?
All SMDJ11CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ11CA, 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 SMDJ11CA part is unused and in its original packaging.
Return procedure for SMDJ11CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ11CA Tags
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