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Alpha & Omega Semiconductor Inc. SMDJ9.0CA
- Part No.:
- SMDJ9.0CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ9.0CA.pdf
- Description:
- 1CH 9.0V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:5,480
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Product details
Overview
SMDJ9.0CA from Alpha & Omega Semiconductor is a bidirectional 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 9.0 V reverse standoff voltage (VRWM), 10.0–11.1 V breakdown voltage (VBR) at 1 mA, 15.4 V maximum clamping voltage (VC) at 194.9 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform.
For engineers reviewing the SMDJ9.0CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low leakage (10 µA @ VRWM), fast response time (<1.0 ps), thermal resistance (RθJA = 75 °C/W), and compliance with J-STD-020 MSL Level 1.
Technical Context
The SMDJ9.0CA operates as a silicon avalanche diode with glass-passivated junction, enabling precise voltage clamping during ESD and lightning-induced transients. Its bidirectional configuration allows symmetrical suppression of positive and negative polarity surges without external polarity management.
Designed for surface-mount use on 8.0 mm × 8.0 mm copper pads, it delivers 3000 W peak pulse power with 0.01% duty cycle repetition rate and exhibits a temperature coefficient of ΔVBR = 0.1% × VBR per °C change from 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 10.0–11.1 V - Confirmed breakdown range ensuring reliable turn-on under surge conditions |
| VC @ IPPM | 15.4 V - Clamping voltage at 194.9 A, limiting downstream voltage stress during 10/1000 µs transients |
| PPPM | 3000 W - Peak pulse power handling on standard 10/1000 µs waveform, critical for IEC 61000-4-5 compliance |
| IR @ VRWM | 10.0 µA - Low reverse leakage preserves system standby power integrity |
| TJ max | +150 °C - Maximum junction temperature enabling operation in industrial ambient environments |
| RθJA | 75 °C/W - Thermal resistance to ambient on standard PCB layout, guiding heatsinking requirements |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and matte tin lead-free plating. Cathode band denotes polarity for unidirectional variants; bidirectional SMDJ9.0CA has no functional polarity marking and conducts identically in both directions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional surge conduction path | Both terminals serve as symmetrical clamping nodes - no fixed anode/cathode assignment; identical electrical behavior in either direction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| Built-in strain relief | Reduces mechanical stress at lead-to-body interface during thermal cycling and board flexure |
| MSL Level 1 rating | Enables standard reflow assembly without pre-baking (peak temp 260 °C) |
| UL 94V-0 flammability | Plastic housing meets stringent fire-safety requirements for enclosed industrial equipment |
| Low profile SMC package | Minimizes board height (max 2.6 mm) while maintaining high power dissipation capability |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 12 V battery-fed CAN/LIN bus transceivers and microcontroller I/O against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across power rails or signal lines to shunt surge energy to ground. Use Value: Withstands 3000 W pulses and clamps to ≤15.4 V, preventing damage to 5 V/3.3 V logic interfaces downstream. | Use Scenario: Input protection for DC-DC converters and power distribution units exposed to ISO 7637-2 Pulse 1, 2a, and 5a events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V input stage, absorbing up to 194.9 A peak current within 10/1000 µs. Use Value: 10 µA leakage at 9.0 V VRWM avoids excessive quiescent current draw in always-on modules. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Surge protection on -48 V telecom rectifier outputs subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed between output rail and chassis ground to suppress differential and common-mode transients. Use Value: Symmetrical 10.0–11.1 V VBR ensures matched clamping in both polarities, critical for negative-rail systems. | Use Scenario: DC link protection in solar string inverters where PV array inputs face high-energy lightning surges. IC Role / Device Role / Timing Role: Secondary-level clamping device parallel to bulk capacitors, limiting voltage overshoot during fast transients. Use Value: 150 °C max junction temperature supports operation in sealed 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 |
|---|---|---|---|
| SAC9.0 | Unidirectional only; same VRWM/VBR/VC but lacks bidirectional symmetry | Requires explicit polarity orientation; unsuitable for AC-coupled or floating signal lines | Select only when circuit topology guarantees consistent polarity and space constraints favor smaller SOD-123FL footprint |
| SMCJ9.0CA | Identical electrical specs and DO-214AB package; differs only in branding and traceability (ON Semiconductor vs. AOS) | No functional difference; validated drop-in replacement per manufacturer cross-reference | Preferred when supply chain diversification or legacy BOM alignment with ON Semi is required |
Compared with SAC9.0, SMDJ9.0CA enables polarity-agnostic placement and simplifies layout; versus SMCJ9.0CA, it offers identical performance with AOS-specific quality and RoHS/Halogen-free compliance documentation.
Availability
SMDJ9.0CA is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, long-lifecycle support, and full traceability.
Supply support for SMDJ9.0CA 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 is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications demanding high PPPM, low clamping ratio, and MSL-1 reflow compatibility.
FAQ
What is the clamping voltage of the SMDJ9.0CA under a 10/1000 µs surge?
The SMDJ9.0CA clamps to a maximum of 15.4 V when subjected to its rated peak pulse current of 194.9 A on a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during surge events, ensuring downstream components remain within safe operating limits.
Is the SMDJ9.0CA suitable for bidirectional signal line protection?
Yes, the SMDJ9.0CA is explicitly designed as a bidirectional TVS diode, with identical electrical characteristics in both polarities. Its CA suffix confirms symmetrical breakdown and clamping behavior, making it appropriate for protecting AC-coupled interfaces, differential buses like RS-485, or any floating node where voltage polarity reversal may occur.
What is the maximum junction temperature rating for the SMDJ9.0CA?
The SMDJ9.0CA has a maximum junction temperature (TJ max) of +150 °C, verified per AOS datasheet Rev. 1.2. This rating allows reliable operation in high-ambient environments such as engine compartments, industrial enclosures, or sealed power supplies where thermal management is constrained.
Does the SMDJ9.0CA meet lead-free and RoHS requirements?
Yes, the SMDJ9.0CA is a certified AOS Green Product: lead-free, RoHS compliant, and halogen-free per AOS Green Policy. Its matte tin lead finish and DO-214AB package conform to J-STD-020 MSL Level 1, supporting Pb-free reflow soldering at peak temperatures up to 260 °C without preconditioning.
How does the SMDJ9.0CA compare to the unidirectional SMDJ9.0A in terms of application flexibility?
The SMDJ9.0CA provides full bidirectional clamping, eliminating polarity-dependent placement and enabling use on AC signals or floating rails; the SMDJ9.0A requires correct cathode orientation and only protects against one polarity of surge. For designs with uncertain or reversing voltage transients, SMDJ9.0CA offers superior robustness and layout simplicity.
SMDJ9.0CA 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 194.9A
- 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
SMDJ9.0CA FAQ
1.How can I place an order for SMDJ9.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ9.0CA 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 SMDJ9.0CA reliable?
The price and inventory of SMDJ9.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ9.0CA is usually 5 days.
3.What payment methods are accepted for SMDJ9.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ9.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ9.0CA?
SMDJ9.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ9.0CA 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 SMDJ9.0CA?
For technical support, including SMDJ9.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ9.0CA requirements.
6.How does Aetrix verify that SMDJ9.0CA is sourced from the original manufacturer or authorized distributors?
All SMDJ9.0CA 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 SMDJ9.0CA meets industry standards.
7.What is the process for return or replacement of SMDJ9.0CA?
All SMDJ9.0CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ9.0CA, 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 SMDJ9.0CA part is unused and in its original packaging.
Return procedure for SMDJ9.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ9.0CA Tags
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