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Alpha & Omega Semiconductor Inc. SMDJ110A
- Part No.:
- SMDJ110A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ110A.pdf
- Description:
- 1CH 110V UNIDIRECTIONAL 3000W SM
- Quantity:
- Payment:
- Shipping:
Inventory:6,077
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Product details
Overview
SMDJ110A from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor diode (TVS) designed for high-energy surge protection in DC power lines and signal interfaces. It features a 110 V reverse standoff voltage (VRWM), 122–135 V breakdown voltage (VBR) at 1 mA, 177 V maximum clamping voltage (VC) at 17 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 SMDJ110A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 10/1000 µs surges, thermal resistance (RθJA = 75 °C/W), unidirectional polarity with cathode band marking, DO-214AB package compatibility, and compliance with JEDEC mechanical standards and UL 94V-0 flammability rating.
Technical Context
The SMDJ110A operates as a silicon avalanche diode optimized for fast transient suppression. Its glass-passivated junction enables sub-1 ps response time from 0 V to breakdown, while its low-profile DO-214AB (SMC J-Bend) package supports surface-mount assembly with strain relief and matte tin lead-free plating.
It delivers 3000 W peak pulse power handling on standard 10/1000 µs waveforms when mounted on 8.0 mm × 8.0 mm copper pads, with thermal resistance of 15 °C/W junction-to-lead and 75 °C/W junction-to-ambient - enabling reliable operation up to TJ = 150 °C in high-density power electronics layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 110 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1 mA | 122–135 V - Confirmed breakdown range ensures predictable turn-on during overvoltage events |
| VC @ IPPM=17 A | 177 V - Clamping voltage limits downstream component stress during 10/1000 µs surges |
| PPPM | 3000 W - Peak pulse power rating defines maximum transient energy absorption capability |
| TJ max | +150 °C - Maximum junction temperature supports operation in enclosed industrial enclosures |
| RθJA | 75 °C/W - Thermal resistance determines required PCB copper area for thermal management |
| Polarity | Unidirectional - Cathode band denotes polarity; not suitable for AC or bidirectional surge paths |
Pinout & Package
DO-214AB (SMC J-Bend) package: molded plastic case with J-bend leads, JEDEC-compliant outline, matte tin lead-free plating, and cathode band marking on the anode side for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables clamping before sensitive downstream circuitry experiences overvoltage |
| Glass passivated junction | Improved reliability and stable VBR over temperature and lifetime vs. epoxy-passivated alternatives |
| Low profile DO-214AB | Optimizes board space in high-density power modules without sacrificing surge rating |
| UL 94V-0 flammability | Self-extinguishing plastic housing meets safety requirements for enclosed industrial equipment |
| MSL1 moisture sensitivity | Compatible with standard SMT reflow profiles up to 260 °C peak, no baking required |
Applications
| Industrial Motor Drives | DC Power Supply Inputs |
|---|---|
Use Scenario: Protection of IGBT gate driver ICs against inductive kickback from motor windings during PWM switching. IC Role / Device Role / Timing Role: TVS clamps transient spikes exceeding 110 V to ≤177 V within sub-picosecond response window. Use Value: Prevents gate oxide damage and false triggering by limiting voltage overshoot below 177 V at 17 A surge current. | Use Scenario: Surge suppression on 100–120 V DC input rails of telecom rectifiers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS absorbs 3000 W 10/1000 µs transients on primary-side DC bus. Use Value: Maintains VRWM = 110 V margin above nominal rail while clamping to 177 V to protect upstream EMI filters and downstream DC-DC converters. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 Pulse 5a transients. IC Role / Device Role / Timing Role: Fast-acting unidirectional clamp referenced to chassis ground on 12 V supply lines. Use Value: Withstands 300 A peak forward surge (IFSM = 300 A, 8.3 ms half-sine) and clamps to 177 V to preserve transceiver integrity. | Use Scenario: DC-link surge protection in solar string inverters where PV arrays generate high-voltage transients during rapid cloud cover transitions. IC Role / Device Role / Timing Role: Primary-level TVS on 1000 V-class DC bus to limit overvoltage during grid fault recovery. Use Value: 110 V VRWM provides design margin for 1000 V systems using series-stacked TVS arrays; 3000 W rating handles repetitive surge duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC110A (Littelfuse) | Same DO-214AB package, identical VRWM (110 V), but lower PPPM (1500 W) and higher VC (187 V @ 16 A) | Lower surge energy handling; suitable only for lighter-duty 10/1000 µs transients | Select when cost sensitivity outweighs need for full 3000 W rating and tighter clamping |
| 1.5KE110A (ON Semiconductor) | Through-hole DO-201 package, same electrical specs (VRWM = 110 V, VBR = 122–135 V), but RθJA = 100 °C/W and no MSL1 rating | Requires through-hole assembly and larger PCB footprint; unsuitable for high-density SMT designs | Choose only if legacy through-hole manufacturing infrastructure is fixed and thermal derating is acceptable |
Compared with SAC110A and 1.5KE110A, the SMDJ110A delivers superior surge robustness (3000 W vs. 1500 W or 1500 W), tighter thermal management (RθJA = 75 °C/W), and full SMT process compatibility (MSL1, 260 °C reflow), making it optimal for next-generation compact power electronics requiring high-reliability transient suppression.
Availability
SMDJ110A is available at Aetrix Electronics and suitable for industrial motor drives, DC power supply inputs, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for SMDJ110A 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 surface-mount power systems, targeting applications demanding 3000 W surge capability, fast sub-picosecond response, and JEDEC-standardized rugged packaging.
FAQ
What is the clamping voltage of the SMDJ110A under a 10/1000 µs surge?
The SMDJ110A has a maximum clamping voltage (VC) of 177 V at 17 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 circuits during transient events. The SMDJ110A maintains this clamping performance across its specified operating temperature range and is validated with 8.0 mm × 8.0 mm copper pad mounting per datasheet test setup.
Is the SMDJ110A suitable for bidirectional surge protection?
No, the SMDJ110A is a unidirectional TVS diode, identified by the "A" suffix and marked with a cathode band. For bidirectional operation, the SMDJ110CA variant must be used. The SMDJ110A conducts only in reverse bias above VBR and blocks forward current beyond its 300 A IFSM rating - it is not rated for symmetrical AC surge suppression.
What is the thermal resistance of the SMDJ110A, and how does it affect layout?
The SMDJ110A 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 value directly impacts PCB copper area requirements: reducing pad size increases thermal impedance, risking junction overheating during repeated surges. The SMDJ110A also specifies RθJL = 15 °C/W, indicating efficient heat conduction to the leads when properly soldered.
Does the SMDJ110A meet lead-free and RoHS requirements?
Yes, the SMDJ110A is a certified AOS Green Product: lead-free, RoHS compliant, and halogen-free per IEC 61249-2-21. Its matte tin lead finish meets JEDEC J-STD-020 MSL1 classification, supporting standard SMT reflow profiles with a maximum peak temperature of 260 °C - no pre-baking is required prior to assembly. The SMDJ110A complies with AOS' published green policy and export control regulations.
How does the SMDJ110A compare to standard 1.5KE series TVS diodes?
The SMDJ110A offers identical electrical ratings (VRWM = 110 V, VBR = 122–135 V) but differs critically in package and thermal performance: it uses surface-mount DO-214AB versus through-hole DO-201, achieves RθJA = 75 °C/W (vs. ~100 °C/W for 1.5KE110A), and is MSL1-rated for modern SMT lines. The SMDJ110A thus enables higher-density layouts and better thermal reliability than 1.5KE110A in automated production environments.
SMDJ110A 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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 17A
- 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
SMDJ110A FAQ
1.How can I place an order for SMDJ110A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ110A 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 SMDJ110A reliable?
The price and inventory of SMDJ110A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ110A is usually 5 days.
3.What payment methods are accepted for SMDJ110A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ110A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ110A?
SMDJ110A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ110A 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 SMDJ110A?
For technical support, including SMDJ110A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ110A requirements.
6.How does Aetrix verify that SMDJ110A is sourced from the original manufacturer or authorized distributors?
All SMDJ110A 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 SMDJ110A meets industry standards.
7.What is the process for return or replacement of SMDJ110A?
All SMDJ110A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ110A, 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 SMDJ110A part is unused and in its original packaging.
Return procedure for SMDJ110A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ110A Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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