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Alpha & Omega Semiconductor Inc. SMDJ110CA
- Part No.:
- SMDJ110CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ110CA.pdf
- Description:
- 1CH 110V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:5,918
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Product details
Overview
SMDJ110CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor diode designed for high-energy surge protection in DC power rails and signal lines. It features a 110 V reverse stand-off 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 10/1000 µs waveform - enabling robust ESD and lightning surge suppression in industrial power supplies.
For engineers reviewing the SMDJ110CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, DO-214AB package compatibility with high-current PCB layouts, thermal resistance (RθJA = 75 °C/W), low leakage (<2 µA @ 110 V), and MSL1 moisture sensitivity rating for lead-free reflow.
Technical Context
The SMDJ110CA operates as a silicon avalanche diode optimized for unidirectional or bidirectional transient suppression. Its glass-passivated junction ensures stable VBR tolerance (±5% typical), while its low-profile DO-214AB package supports surface-mount assembly with strain relief and matte tin lead-free plating compliant with J-STD-020 MSL1 (260 °C peak).
It delivers fast response time (<1.0 ps from 0 V to VBR), 0.01% duty cycle repetition rate, and thermal performance validated under 8.0 mm × 8.0 mm copper pad mounting per JEDEC standards - making it suitable for high-reliability surge protection where clamping voltage margin and junction temperature control (TJ max = 150 °C) are critical.
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 avalanche breakdown range ensuring predictable turn-on threshold |
| VC @ IPPM=17 A | 177 V - Clamped voltage during 10/1000 µs surge, defining protected circuit voltage ceiling |
| PPPM | 3000 W - Peak pulse power handling capacity on standard lightning surge waveform |
| IR @ VRWM | <2 µA - Minimal leakage current preserving efficiency in high-impedance bias networks |
| TJ max | +150 °C - Maximum junction temperature enabling operation in enclosed industrial enclosures |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient on standard FR-4 board, guiding heatsinking needs |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and solderable terminals per MIL-STD-750 Method 2026. Bidirectional polarity indicated by absence of cathode band; terminals are non-polarized and symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals enable bidirectional clamping without orientation dependency |
| Case | Mechanical mounting / thermal path | Plastic body provides strain relief and electrical isolation; thermal path routed via copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and long-term reliability in humid environments |
| MSL1 moisture sensitivity | Enables standard lead-free reflow without baking, reducing manufacturing overhead |
| UL 94V-0 flammability rating | Meets safety requirements for enclosed power electronics and industrial equipment |
| 0.1% × VBR/°C tempco | Predictable VBR drift across -55°C to +150°C operating range for precision clamp design |
| Built-in strain relief | Reduces mechanical stress on solder joints during thermal cycling and vibration |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of 48 V DC input stages against induced surges from nearby motor switching or lightning coupling. IC Role / Device Role / Timing Role: Bidirectional TVS device placed across input bus to clamp transients before they reach DC-DC converters and gate drivers. Use Value: 177 V clamping voltage limits downstream component stress while 3000 W rating absorbs multi-kA surge energy without failure. | Use Scenario: Surge suppression on -48 V telecom rectifier outputs feeding remote radio units. IC Role / Device Role / Timing Role: Bi-directional transient suppressor connected between power rail and ground to protect sensitive PMICs and FPGAs. Use Value: Symmetrical clamping enables protection regardless of polarity reversal events; <2 µA leakage avoids loading low-power standby circuits. |
| Renewable Energy Inverters | Railway Signaling Interfaces |
Use Scenario: DC-link protection in solar string inverters exposed to grid-switching transients and electrostatic discharge. IC Role / Device Role / Timing Role: High-power TVS mounted directly at DC bus entry point to shunt surge current away from IGBT gate drivers and sensors. Use Value: 150 °C max junction temperature supports operation inside sealed outdoor enclosures; DO-214AB footprint allows high-current PCB trace routing. | Use Scenario: Protection of 110 V signaling lines in train control systems subject to traction-induced voltage spikes. IC Role / Device Role / Timing Role: Bidirectional suppressor installed on track-side interface cards to prevent false triggering of relay logic. Use Value: 110 V VRWM matches nominal line voltage; 177 V VC ensures logic-level integrity remains within safe margins during 10/1000 µs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC110CA (Littelfuse) | Same DO-214AB package, 110 V VRWM, but 2500 W PPPM rating and higher VC (185 V @ 15.5 A) | Lower power handling reduces margin in high-energy surge environments like substations | Select when cost sensitivity outweighs need for full 3000 W headroom |
| 1.5KE110CA (ON Semiconductor) | Through-hole DO-201 package, identical electrical specs but incompatible mounting and thermal profile | Not suitable for automated SMT production; requires manual assembly and larger board area | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SAC110CA and 1.5KE110CA, the SMDJ110CA offers superior surge power handling in an SMT-optimized package with lower clamping voltage and MSL1 reflow compliance - making it the preferred choice for new industrial and telecom designs requiring automated assembly and high reliability.
Availability
SMDJ110CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, and renewable energy inverters requiring stable component supply, RoHS-compliant packaging, and verified surge immunity performance.
Supply support for SMDJ110CA 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 industrial, computing, and automotive markets.
The SMDJ series is engineered specifically for high-power transient suppression in harsh environments - delivering consistent clamping performance, low leakage, and robust thermal behavior across extended temperature ranges.
FAQ
What is the maximum clamping voltage of the SMDJ110CA under standard surge conditions?
The SMDJ110CA has a maximum clamping voltage (VC) of 177 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 17 A. This value is measured per JEDEC test standards and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings. The SMDJ110CA maintains this clamping performance across its full operating temperature range.
Is the SMDJ110CA suitable for bidirectional signal line protection?
Yes, the SMDJ110CA is explicitly designed for bidirectional transient suppression, as indicated by the "CA" suffix and confirmed in the datasheet's "Devices for Bipolar Application" section. Its symmetrical terminal structure and identical electrical characteristics in both directions allow it to protect AC-coupled or polarity-agnostic interfaces - such as RS-485 buses or Ethernet PHY lines - without requiring external polarity management. The SMDJ110CA achieves this while maintaining <2 µA reverse leakage at 110 V.
What is the thermal resistance of the SMDJ110CA, and how does it affect layout design?
The SMDJ110CA 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 JEDEC standards. This value directly informs PCB copper area requirements: reducing thermal resistance demands larger or multiple thermal pads, internal planes, or thermal vias. For continuous high-duty-cycle surge events, designers must ensure the SMDJ110CA's junction temperature stays below 150 °C - meaning ambient + (power dissipation × RθJA) must remain within limit. The SMDJ110CA's RθJL of 15 °C/W further supports efficient heat transfer to leads.
Does the SMDJ110CA meet lead-free reflow requirements for automated assembly?
Yes, the SMDJ110CA is rated MSL1 per J-STD-020 and qualified for lead-free reflow with a maximum peak temperature of 260 °C. Its matte tin lead-free plating and DO-214AB package construction eliminate the need for pre-baking, supporting high-yield, high-throughput SMT processes. The SMDJ110CA also complies with RoHS and AOS Green Policy (halogen-free), making it suitable for global industrial and telecom manufacturing without process deviation or compliance risk.
How does the SMDJ110CA compare to unidirectional variants like SMDJ110A in terms of circuit implementation?
The SMDJ110CA differs from the unidirectional SMDJ110A solely in polarity configuration: the CA version uses symmetrical terminals for bidirectional clamping, while the A version includes a cathode band and must be oriented correctly for single-direction protection. Both share identical VRWM (110 V), VBR (122–135 V), VC (177 V), and PPPM (3000 W). Circuit implementation of the SMDJ110CA eliminates orientation checks during placement and simplifies layout for AC or floating-rail applications - a key advantage in space-constrained or high-density designs where the SMDJ110CA replaces two unidirectional devices.
SMDJ110CA 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):
- 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
SMDJ110CA FAQ
1.How can I place an order for SMDJ110CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ110CA 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 SMDJ110CA reliable?
The price and inventory of SMDJ110CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ110CA is usually 5 days.
3.What payment methods are accepted for SMDJ110CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ110CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ110CA?
SMDJ110CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ110CA 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 SMDJ110CA?
For technical support, including SMDJ110CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ110CA requirements.
6.How does Aetrix verify that SMDJ110CA is sourced from the original manufacturer or authorized distributors?
All SMDJ110CA 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 SMDJ110CA meets industry standards.
7.What is the process for return or replacement of SMDJ110CA?
All SMDJ110CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ110CA, 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 SMDJ110CA part is unused and in its original packaging.
Return procedure for SMDJ110CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ110CA Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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