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Alpha & Omega Semiconductor Inc. SMDJ13A
- Part No.:
- SMDJ13A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ13A.pdf
- Description:
- 1CH 13V UNIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:5,768
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Product details
Overview
SMDJ13A from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor diode (TVS) designed for robust overvoltage protection in DC power rails and signal lines. It features a 13.0 V reverse stand-off voltage (VRWM), 14.4–15.9 V breakdown voltage (VBR) at 1 mA, 21.5 V maximum clamping voltage (VC) at 139.6 A peak pulse current, and 3000 W peak pulse power dissipation on a 10/1000 µs waveform - deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the SMDJ13A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 139.6 A surge, thermal resistance (RθJA = 75 °C/W), unidirectional polarity with cathode band marking, and DO-214AB surface-mount compatibility for high-reliability board-level ESD and lightning surge suppression.
Technical Context
The SMDJ13A operates as a silicon avalanche diode optimized for fast transient response (<1.0 ps rise time from 0 V to VBR) and low clamping ratio (VC/VBR ≈ 1.48). Its glass-passivated junction ensures stable breakdown characteristics across temperature, while the built-in strain relief and MSL1-rated lead-free matte tin plating support automated reflow assembly.
Rated for -55 °C to +150 °C junction operation, it delivers 3000 W peak pulse power when mounted on 8.0 mm × 8.0 mm copper pads per terminal. Its 0.01% duty cycle repetition rate and 15 °C/W junction-to-lead thermal resistance enable reliable energy absorption in infrequent but high-energy transients such as IEC 61000-4-5 surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 13.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 14.4–15.9 V - Confirmed avalanche breakdown range ensuring predictable turn-on threshold |
| VC @ IPPM | 21.5 V - Clamped voltage during 139.6 A 10/1000 µs surge, limiting downstream stress |
| PPPM | 3000 W - Peak transient power handling capability under standardized surge waveform |
| TJ max | +150 °C - Maximum junction temperature enabling operation in high-ambient industrial environments |
| RθJA | 75 °C/W - Thermal resistance defining required PCB copper area for steady-state thermal management |
| IR @ VRWM | 2.0 µA - Low leakage current preserving efficiency in standby and low-power circuits |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and solderable matte tin-plated terminals per MIL-STD-750 Method 2026. Polarity indicated by cathode band (positive end for unidirectional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to circuit ground or lowest potential rail during clamping |
| Cathode | Protected line input | Connected to line being protected; cathode band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables clamping before transient energy couples into sensitive ICs |
| Glass passivated junction | Stable VBR over lifetime and temperature - eliminates parameter drift in harsh environments |
| MSL1 moisture sensitivity | Reflow-compatible up to 260 °C peak - supports standard Pb-free assembly without baking |
| UL 94V-0 flammability rating | Self-extinguishing plastic housing - meets safety requirements for enclosed power systems |
| Built-in strain relief | Reduces mechanical stress at lead-to-body interface - improves reliability under thermal cycling |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sensing inputs against IGBT switching transients and load dump spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC bus and ground to clamp positive-going surges above 13 V. Use Value: Limits voltage excursion to ≤21.5 V during 139.6 A surges, preventing latch-up or oxide rupture in isolated gate drivers. | Use Scenario: Input-stage surge suppression on 48 V DC distribution boards in base station power systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on rectified AC/DC front-end, coordinated with MOVs for multi-level protection. Use Value: Absorbs 3000 W transient energy without degradation, maintaining system uptime during lightning-induced surges. |
| Automotive Body Control Modules | Industrial PLC I/O Cards |
Use Scenario: Protection of LIN bus transceivers and microcontroller GPIOs against battery reverse connection and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V supply rail upstream of LDO regulators. Use Value: Withstands 300 A 8.3 ms half-sine surge (IFSM), surviving cranking and load-dump events per ISO 7637-2. | Use Scenario: Field-side analog input protection against wiring faults and induced surges in factory automation sensors. IC Role / Device Role / Timing Role: Clamp device on 24 V sensor loop supply, placed before signal conditioning amplifiers. Use Value: Low 2.0 µA leakage preserves accuracy of µA-level current-loop measurements; 150 °C TJ rating supports enclosure mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC13 | Lower PPPM (1500 W), higher VC (24.4 V at 61.5 A), same DO-214AB package | Less robust for IEC 61000-4-5 Level 4 surges requiring ≥3000 W handling | Select SMDJ13A where full 3000 W surge immunity is mandated; SAC13 suits cost-sensitive lower-energy designs |
| 1.5SMC13A | Identical electrical specs and DO-214AB footprint; manufactured by ON Semiconductor | No functional or layout change required; validated for same industrial surge standards | Direct second-source option with identical performance and qualification - ideal for dual-sourcing strategies |
Compared with SAC13 and 1.5SMC13A, the SMDJ13A provides superior surge margin (3000 W vs. 1500 W) and matches 1.5SMC13A's full specification set, making it optimal for high-reliability industrial and telecom deployments where single-part qualification suffices.
Availability
SMDJ13A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply and long-term production continuity.
Supply support for SMDJ13A 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 high-energy transient suppression in industrial, telecom, and automotive power systems - emphasizing ruggedness, repeatable clamping, and surface-mount manufacturability.
FAQ
What is the maximum clamping voltage of the SMDJ13A under a 10/1000 µs surge?
The SMDJ13A exhibits a maximum clamping voltage (VC) of 21.5 V when subjected to its rated peak pulse current of 139.6 A on a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within absolute maximum ratings.
Does the SMDJ13A support bidirectional transient suppression?
No, the SMDJ13A is a unidirectional TVS diode, designated by the "A" suffix. Bidirectional operation requires the "CA" variant (SMDJ13CA), which provides symmetrical clamping in both polarities. The SMDJ13A's cathode band marks the protected line terminal and must be oriented toward the positive rail in standard DC protection configurations.
What is the thermal resistance of the SMDJ13A, and how does it affect PCB layout?
The SMDJ13A has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures during repeated surges or elevated ambient conditions, PCB layout must allocate sufficient copper area and consider thermal vias - undersized pads will cause excessive temperature rise and premature failure.
Is the SMDJ13A compliant with RoHS and halogen-free standards?
Yes, the SMDJ13A is an AOS Green Product: fully RoHS compliant, lead-free, and halogen-free per AOS' Green Policy. It meets UL 94V-0 flammability requirements and carries MSL1 rating for Pb-free reflow processing - verified in Rev. 1.2 (July 2021) datasheet and confirmed on aosmd.com.
What is the leakage current specification for the SMDJ13A at its rated VRWM?
The SMDJ13A specifies a maximum reverse leakage current (IR) of 2.0 µA at its reverse stand-off voltage (VRWM) of 13.0 V and ambient temperature of 25 °C. This low leakage ensures minimal power loss in always-on circuits and preserves accuracy in precision analog monitoring paths where microamp-level currents matter.
SMDJ13A 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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 139.6A
- 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
SMDJ13A FAQ
1.How can I place an order for SMDJ13A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ13A 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 SMDJ13A reliable?
The price and inventory of SMDJ13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ13A is usually 5 days.
3.What payment methods are accepted for SMDJ13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ13A?
SMDJ13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ13A 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 SMDJ13A?
For technical support, including SMDJ13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ13A requirements.
6.How does Aetrix verify that SMDJ13A is sourced from the original manufacturer or authorized distributors?
All SMDJ13A 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 SMDJ13A meets industry standards.
7.What is the process for return or replacement of SMDJ13A?
All SMDJ13A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ13A, 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 SMDJ13A part is unused and in its original packaging.
Return procedure for SMDJ13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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