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Alpha & Omega Semiconductor Inc. SMDJ10A
- Part No.:
- SMDJ10A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ10A.pdf
- Description:
- 1CH 10V UNIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:8,017
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Product details
Overview
SMDJ10A from Alpha & Omega Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 10.0 V reverse stand-off voltage (VRWM), 11.1–12.3 V breakdown voltage (VBR) at 1 mA, 17.0 V maximum clamping voltage (VC) at 176.5 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform.
For engineers reviewing the SMDJ10A datasheet, pinout, applications, or equivalent options, key selection considerations include its DO-214AB (SMC) package compatibility, unidirectional polarity with cathode band marking, low leakage (5.0 µA @ VRWM), fast sub-1 ps response time, and suitability for automotive power rail, industrial I/O, and telecom port protection where robust 3 kV ESD/IEC 61000-4-5 compliance is required.
Technical Context
The SMDJ10A operates as a clamping-type TVS diode, leveraging an avalanche breakdown mechanism to divert transient energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), while the built-in strain relief and low-profile DO-214AB package support reliable automated assembly and thermal performance under surge stress.
Designed for single-polarity DC protection, it exhibits a typical thermal resistance of 15 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient) when mounted on 8.0 mm × 8.0 mm copper pads. Its 0.01% duty cycle repetition rate and 150 °C maximum junction temperature enable sustained operation in harsh ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 10.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 11.1–12.3 V - Confirmed avalanche onset range ensuring predictable turn-on during transients |
| VC @ IPPM | 17.0 V - Clamped voltage at 176.5 A peak pulse, limiting downstream voltage stress |
| PPPM (10/1000 µs) | 3000 W - Peak surge energy handling capacity for IEC 61000-4-5 Level 4 compliance |
| IR @ VRWM | 5.0 µA - Low leakage preserves system efficiency in standby and low-power modes |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial control enclosures |
| Package | DO-214AB (SMC J-Bend) - Standardized surface-mount footprint with cathode band polarity indicator |
Pinout & Package
DO-214AB (SMC) is a molded plastic surface-mount package with J-bend leads. Polarity is indicated by a color band denoting the cathode terminal; the anode is the unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground during overvoltage events |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Ensures clamping activation before transient energy damages IC inputs or power stages |
| Glass-passivated junction | Stable VBR drift <0.1% × VBR/°C - Maintains consistent clamping threshold across temperature |
| MSL1 moisture sensitivity | Reflow-compatible up to 260 °C peak - Eliminates bake requirements for standard SMT processes |
| UL 94V-0 flammability rating | Self-extinguishing plastic housing - Meets safety standards for enclosed industrial and medical equipment |
| Matte tin lead-free plating | RoHS and AOS Green compliant - Supports environmental compliance without sacrificing solderability |
Applications
| Automotive Power Rail Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point upstream of DC/DC converters and microcontrollers. Use Value: Limits voltage excursion to ≤17.0 V during 3000 W surges, preventing latch-up or gate oxide damage in downstream silicon. | Use Scenario: Shielding PLC digital input modules from field-wiring induced surges (IEC 61000-4-5, 2 kV/12 Ω coupling). IC Role / Device Role / Timing Role: Standalone unidirectional TVS on each channel's signal line, referenced to common ground. Use Value: Sub-1 ps response ensures clamping occurs before 10/1000 µs surge reaches logic-level receivers, preserving signal integrity and timing margins. |
| Telecom Ethernet Port Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding PoE-powered switch ports against lightning-induced longitudinal surges on twisted-pair lines. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices per differential pair, configured in back-to-back arrangement for common-mode suppression. Use Value: 3000 W rating supports multi-event surge endurance required for outdoor telecom infrastructure deployments. | Use Scenario: Secondary-side overvoltage protection in AC/DC adapters after rectification and bulk capacitance. IC Role / Device Role / Timing Role: Final-stage clamping element between DC output and connector, absorbing residual switching spikes and ESD. Use Value: 5.0 µA IR at 10 V minimizes no-load power loss, critical for Energy Star and EU CoC Tier 2 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC10 | Same DO-214AB package; 10 V VRWM but lower PPPM (1500 W); higher VC (18.0 V @ 83.3 A) | Lower surge margin; suitable only for lighter-duty consumer-grade protection | Select SAC10 only if system-level testing confirms 1500 W surge immunity is sufficient and layout allows tighter thermal management. |
| SMCJ10A | Identical electrical specs and DO-214AB package; manufactured by Vishay; same 3000 W rating and 17.0 V VC | No functional difference; qualified for identical IEC/ISO standards | SMCJ10A is a direct second-source alternative with identical performance and footprint-no redesign needed. |
Compared with SAC10, the SMDJ10A delivers double the surge power handling and tighter clamping, making it appropriate for automotive and industrial use; versus SMCJ10A, it offers identical protection capability with AOS-specific process enhancements including lower thermal resistance and extended MSL1 reflow tolerance.
Availability
SMDJ10A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial digital I/O protection, and telecom Ethernet port protection requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for SMDJ10A 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 high-efficiency MOSFETs, TVS diodes, and power ICs for computing, consumer, industrial, and automotive markets.
The SMDJ series is part of AOS' high-power TVS portfolio engineered specifically for robust IEC 61000-4-5 and ISO 7637-2 transient suppression in space-constrained surface-mount applications.
FAQ
What is the clamping voltage of the SMDJ10A under maximum rated surge current?
The SMDJ10A has a maximum clamping voltage (VC) of 17.0 V when subjected to its peak pulse current (IPPM) of 176.5 A on a 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures downstream components see no more than 17.0 V during worst-case transient events. The SMDJ10A maintains this clamping performance across its specified operating temperature range.
Is the SMDJ10A suitable for bidirectional surge protection?
No, the SMDJ10A is a unidirectional TVS diode, intended for DC line protection where polarity is fixed. For bidirectional applications such as AC lines or differential data pairs, the SMDJ10CA variant must be used instead. The SMDJ10A features a cathode band marking and conducts only in reverse bias above its breakdown voltage.
What is the thermal resistance of the SMDJ10A and how does it affect PCB layout?
The SMDJ10A has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe operation below 150 °C junction temperature during repeated surges, designers must provide adequate copper area and avoid excessive trace length between the SMDJ10A and ground plane.
Does the SMDJ10A meet RoHS and halogen-free requirements?
Yes, the SMDJ10A is an AOS Green Product: fully RoHS compliant, lead-free, and halogen-free per IEC 61249-2-21. Its matte tin lead finish and UL 94V-0 molded plastic case satisfy global environmental and safety regulations for industrial and consumer electronics. The SMDJ10A carries AOS' official Green Policy certification.
How does the SMDJ10A compare to the older SMAJ10A in terms of surge capability?
The SMDJ10A provides 3000 W peak pulse power, doubling the 1500 W rating of the SMAJ10A in the same DO-214AB package. It achieves this through optimized die geometry and enhanced thermal design, enabling higher IPPM (176.5 A vs. 83.3 A) and lower clamping voltage (17.0 V vs. 18.0 V). The SMDJ10A is not a drop-in replacement due to differing surge derating curves and thermal behavior.
SMDJ10A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 176.5A
- 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
SMDJ10A FAQ
1.How can I place an order for SMDJ10A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ10A 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 SMDJ10A reliable?
The price and inventory of SMDJ10A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ10A is usually 5 days.
3.What payment methods are accepted for SMDJ10A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ10A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ10A?
SMDJ10A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ10A 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 SMDJ10A?
For technical support, including SMDJ10A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ10A requirements.
6.How does Aetrix verify that SMDJ10A is sourced from the original manufacturer or authorized distributors?
All SMDJ10A 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 SMDJ10A meets industry standards.
7.What is the process for return or replacement of SMDJ10A?
All SMDJ10A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ10A, 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 SMDJ10A part is unused and in its original packaging.
Return procedure for SMDJ10A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ10A Tags
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