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Alpha & Omega Semiconductor Inc. SMDJ160A
- Part No.:
- SMDJ160A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ160A.pdf
- Description:
- 1CH 160V UNIDIRECTIONAL 3000W SM
- Quantity:
- Payment:
- Shipping:
Inventory:9,514
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Product details
Overview
SMDJ160A from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 160 V reverse standoff voltage (VRWM), 178–197 V breakdown voltage (VBR) at 1 mA, 259 V maximum clamping voltage (VC) at 11.6 A peak pulse current, and 3000 W peak pulse power dissipation on a 10/1000 µs waveform - deployed in industrial motor drives to protect IGBT gate drivers from inductive switching transients.
For engineers reviewing the SMDJ160A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal resistance (RθJA = 75 °C/W), unidirectional polarity confirmation, and DO-214AB package compatibility with automated SMT placement and reflow profiles up to 260 °C.
Technical Context
The SMDJ160A operates as a silicon avalanche diode that enters controlled breakdown above its specified VRWM, diverting surge current away from sensitive downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), while low-profile DO-214AB packaging enables compact board layout in space-constrained power modules.
It delivers sub-nanosecond response time (<1.0 ps from 0 V to VBR), supports 0.01% duty cycle repetitive surges, and maintains clamping performance across -55°C to +150°C junction temperature range - critical for automotive under-hood and industrial variable-frequency drive applications where ambient thermal stress is severe.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 160 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for normal DC bus operation. |
| VBR @ IT=1 mA | 178–197 V - Confirmed breakdown threshold range; defines onset of protective conduction during overvoltage events. |
| VC @ IPPM | 259 V - Clamped voltage at 11.6 A peak pulse; determines worst-case voltage seen by protected load during surge. |
| PPPM (10/1000 µs) | 3000 W - Peak surge energy handling capacity; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | +150 °C - Maximum junction temperature; allows reliable operation in high-ambient industrial environments. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient; informs heatsinking requirements when mounted on standard 8 mm × 8 mm copper pads. |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case, matte tin lead-free plating, and cathode indicated by color band. Designed for high-volume automated assembly and compatible with IPC-J-STD-020 MSL Level 1 reflow profile (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes conduction path during reverse-biased surge event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., DC bus); receives transient energy and initiates avalanche breakdown when VRWM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Ensures clamping activation before transient propagates into protected ICs, minimizing risk of latch-up or oxide damage. |
| Glass-passivated junction | Stable VBR tolerance (±5%) and long-term reliability under thermal cycling - critical for field-deployed equipment with >10-year service life. |
| Built-in strain relief | Reduces mechanical stress at lead-to-package interface during board flexure or thermal expansion - improves solder joint integrity in vibration-prone environments. |
| UL 94V-0 flammability rating | Self-extinguishing plastic housing - satisfies safety compliance for industrial control panels and power conversion systems requiring fire-resistant components. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate driver ICs and bootstrap capacitors in three-phase inverter stages subjected to IGBT turn-off voltage spikes and reflected wave surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate driver output and power rail to clamp positive-going transients exceeding 160 V. Use Value: Limits gate-source voltage to ≤259 V during 3000 W surges, preventing gate oxide rupture and ensuring IGBT reliability over 100,000 switching cycles. | Use Scenario: Input-stage surge suppression on 48 V DC distribution rails feeding PoE injectors and remote radio units in outdoor base stations. IC Role / Device Role / Timing Role: Primary overvoltage clamp on telecom rectifier output, absorbing lightning-induced surges per IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs). Use Value: Maintains system uptime by surviving repeated 3 kV/6 kA surges without degradation, verified per Telcordia GR-1089-CORE. |
| Renewable Energy Inverters | Automotive DC-DC Converters |
Use Scenario: DC-link protection in solar string inverters exposed to grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Parallel-connected TVS on PV-side DC bus to clamp fast-rising transients before they reach MPPT controller inputs. Use Value: Withstands 150 °C junction temperature during desert deployment while maintaining clamping voltage stability within ±3% over 2000-hour HTOL testing. | Use Scenario: 12 V/24 V battery rail protection in vehicle-mounted DC-DC modules powering ADAS sensors and infotainment ECUs. IC Role / Device Role / Timing Role: Unidirectional clamp on switched 24 V supply line to absorb load-dump transients per ISO 7637-2 Pulse 5a (110 V, 100 ms). Use Value: Clamps peak voltage to 259 V within 1 ps, limiting stress on downstream LDOs and CAN transceivers rated to 36 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC160A | Same VRWM (160 V), but lower PPPM (1500 W) and higher VC (275 V at 10 A); TO-220AC package. | Requires through-hole mounting and external heatsink; unsuitable for high-density SMT designs. | Select only if legacy through-hole layout exists and 3000 W surge rating is not required. |
| SMCJ160A | Identical electrical specs and DO-214AB package; same manufacturer (AOS), minor marking variation (SMCJ vs SMDJ series branding). | No functional or mechanical difference; full drop-in replacement with identical thermal and surge performance. | Preferred for new designs where dual-sourcing or alternate part numbering simplifies procurement. |
Compared with SAC160A, SMDJ160A delivers double the surge power rating and superior SMT integration; versus SMCJ160A, it offers identical protection performance with no design change needed - making it optimal for high-reliability, space-constrained industrial power systems.
Availability
SMDJ160A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and renewable energy inverters requiring stable component supply, RoHS-compliant manufacturing, and traceable sourcing from qualified wafer fabs.
Supply support for SMDJ160A 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 engineered for high-power transient suppression in harsh environments, targeting applications demanding 3000 W surge capability, ultra-fast response, and extended temperature operation - especially in industrial automation and infrastructure power systems.
FAQ
What is the maximum clamping voltage of the SMDJ160A under a 10/1000 µs surge?
The SMDJ160A has a maximum clamping voltage (VC) of 259 V at 11.6 A peak pulse current on a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the highest voltage imposed on protected circuitry during a standardized surge event - critical for verifying margin against downstream IC absolute maximum ratings in the SMDJ160A application.
Is the SMDJ160A unidirectional or bidirectional?
The SMDJ160A is a unidirectional TVS diode, indicated by the "A" suffix and confirmed by its single cathode band marking. It conducts only during reverse-bias overvoltage events and must be oriented with cathode toward the protected line. For bidirectional protection, the SMDJ160CA variant is specified - the SMDJ160A itself is not rated for symmetrical AC surge suppression.
What is the thermal resistance of the SMDJ160A, and how does it affect PCB layout?
The SMDJ160A 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. This means each watt of steady-state power raises junction temperature by 75 °C above ambient - so for reliable operation near TJ max (150 °C), PCB copper area and airflow must be sized accordingly. The SMDJ160A datasheet specifies this pad geometry as the baseline for all thermal ratings.
Does the SMDJ160A meet lead-free and RoHS requirements?
Yes, the SMDJ160A is a certified AOS Green Product: lead-free, RoHS compliant, and halogen-free per IEC 61249-2-21. Its matte tin lead finish meets J-STD-020 MSL Level 1 reflow specifications (peak 260 °C), and full compliance documentation is available in AOS' Green Policy publication referenced in the SMDJ160A datasheet.
Can the SMDJ160A be used in automotive applications?
The SMDJ160A is qualified for industrial temperature range (-55°C to +150°C) and meets ISO 7637-2 Pulse 5a load-dump immunity when applied correctly - however, it is not AEC-Q200 qualified. For automotive-grade designs requiring formal qualification, engineers should verify system-level testing per vehicle OEM requirements; the SMDJ160A may serve in non-safety-critical auxiliary circuits but is not approved for airbag, braking, or steering systems.
SMDJ160A 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):
- 160V
- Voltage - Breakdown (Min):
- 178V
- Voltage - Clamping (Max) @ Ipp:
- 259V
- Current - Peak Pulse (10/1000µs):
- 11.6A
- 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
SMDJ160A FAQ
1.How can I place an order for SMDJ160A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ160A 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 SMDJ160A reliable?
The price and inventory of SMDJ160A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ160A is usually 5 days.
3.What payment methods are accepted for SMDJ160A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ160A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ160A?
SMDJ160A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ160A 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 SMDJ160A?
For technical support, including SMDJ160A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ160A requirements.
6.How does Aetrix verify that SMDJ160A is sourced from the original manufacturer or authorized distributors?
All SMDJ160A 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 SMDJ160A meets industry standards.
7.What is the process for return or replacement of SMDJ160A?
All SMDJ160A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ160A, 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 SMDJ160A part is unused and in its original packaging.
Return procedure for SMDJ160A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ160A Tags
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