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Alpha & Omega Semiconductor Inc. SMDJ64CA
- Part No.:
- SMDJ64CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ64CA.pdf
- Description:
- 1CH 64V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:9,006
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Product details
Overview
SMDJ64CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, designed for high-energy surge protection in DC power lines and data interfaces. It features 64 V reverse standoff voltage (VRWM), 71.1–78.6 V breakdown voltage (VBR) at 1 mA, 103 V maximum clamping voltage (VC) at 29.2 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform.
For engineers reviewing the SMDJ64CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low leakage (<2 µA @ VRWM), fast response time (<1 ps), JEDEC-compliant DO-214AB surface-mount package, and suitability for industrial power supply input protection and automotive body electronics.
Technical Context
The SMDJ64CA operates as a voltage-clamping device that conducts above its breakdown threshold to divert transient energy away from sensitive downstream circuitry. Its bi-directional configuration enables symmetrical suppression of both positive and negative polarity surges without requiring external polarity management.
It delivers 3000 W peak pulse power handling with thermal resistance of 15 °C/W junction-to-lead and 75 °C/W junction-to-ambient (on 8 mm × 8 mm copper pads), supporting reliable operation up to 150 °C junction temperature under repetitive surge conditions at 0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 64 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 71.1 V / 78.6 V @ 1 mA - Confirmed breakdown range ensuring predictable turn-on behavior |
| VC @ IPPM | 103 V @ 29.2 A - Clamping voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 3000 W - Peak pulse power dissipation capacity for high-energy transients like lightning-induced surges |
| IR @ VRWM | <2 µA - Minimal leakage current preserving efficiency in standby and low-power modes |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial environments with elevated ambient temperatures |
| RθJL | 15 °C/W - Low thermal resistance supports effective heat transfer to PCB copper pads |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case and matte tin lead-free plating; polarity indicated by cathode band for unidirectional variants, but SMDJ64CA is bi-directional and has no functional polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge conduction path | Either terminal serves as input/output - no fixed anode/cathode assignment; identical clamping in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Fast response time | <1 ps rise time protects against ESD and fast-rising transients before downstream ICs are damaged |
| MSL1 moisture sensitivity | Compatible with standard SMT reflow profiles up to 260 °C peak, eliminating bake requirements |
| UL 94V-0 flammability rating | Plastic housing meets safety standards for enclosed industrial and automotive enclosures |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24 V DC input rails in programmable logic controllers (PLCs) and motor drives from load dump and inductive switching transients. IC Role / Device Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤103 V, preventing damage to 36 V-rated input stages while sustaining 3000 W surge energy per event. | Use Scenario: Safeguarding LIN bus transceivers and sensor inputs in door modules and lighting control units exposed to battery voltage spikes. IC Role / Device Role: Bi-directional TVS suppressing both positive load dump and negative reverse-battery events. Use Value: Symmetrical clamping ensures consistent protection regardless of transient polarity, eliminating need for dual-diode arrangements. |
| Telecom DC Feeder Line Protection | Renewable Energy Charge Controller Interface |
Use Scenario: Shielding PoE-powered remote radios and base station backhaul equipment from induced surges on 48 V DC feeder lines. IC Role / Device Role: Secondary-level surge protector mounted at board edge before DC-DC regulation and Ethernet PHY. Use Value: 103 V clamping voltage preserves margin below 100 V isolation ratings of Ethernet magnetics and PHY ICs. | Use Scenario: Protecting MPPT controller inputs connected to solar panel strings subject to lightning-induced common-mode surges. IC Role / Device Role: Bidirectional clamp across PV+ and PV− terminals to shunt differential-mode transients. Use Value: 64 V VRWM matches typical open-circuit voltage of 12–24 V nominal solar arrays, enabling precise voltage coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC64CA (Littelfuse) | Same VRWM (64 V), slightly higher VC (105 V @ 28.6 A), identical DO-214AB package and bi-directional function | Approved for UL 497B telecom surge protection; tighter VBR tolerance (±5% vs ±6.5% for SMDJ64CA) | Preferred where UL 497B compliance or tighter VBR spec is required; otherwise functionally interchangeable |
| SMCJ64CA (ON Semiconductor) | Identical electrical specs (VRWM=64 V, VBR=71.1–78.6 V, VC=103 V), same DO-214AB package, RoHS/lead-free compatible | Qualified to AEC-Q101 for automotive; broader temperature validation (-65°C to +150°C vs -55°C to +150°C) | Select when automotive qualification or extended low-temp operation is mandatory; otherwise direct performance match |
Compared with SAC64CA and SMCJ64CA, the SMDJ64CA offers identical clamping performance and package compatibility but distinguishes itself with Alpha & Omega's optimized thermal resistance (15 °C/W J-to-L) and MSL1 reflow readiness-advantageous for high-volume industrial SMT production.
Availability
SMDJ64CA is available at Aetrix Electronics and suitable for industrial power input protection, automotive body electronics, telecom DC feeder line protection, and renewable energy charge controller interface requiring stable component supply and long-term lifecycle support.
Supply support for SMDJ64CA 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's high-power surface-mount TVS portfolio, engineered specifically for robust transient immunity in harsh-environment DC power systems where space-constrained layouts demand high PPPM in compact DO-214AB packages.
FAQ
What is the breakdown voltage range of the SMDJ64CA?
The SMDJ64CA has a reverse breakdown voltage (VBR) range of 71.1 V to 78.6 V measured at 1 mA test current, per the manufacturer's datasheet Rev. 1.2. This specified tolerance ensures consistent clamping onset across production lots and supports reliable coordination with downstream overvoltage protection thresholds in designs using the SMDJ64CA.
Is the SMDJ64CA unidirectional or bidirectional?
The SMDJ64CA is a bi-directional transient voltage suppressor, meaning it provides symmetrical clamping for both positive- and negative-polarity transients without requiring orientation during placement. The "CA" suffix explicitly denotes bi-directional functionality, and electrical characteristics apply identically in both directions - a key distinction from unidirectional variants like SMDJ64A.
What is the maximum clamping voltage of the SMDJ64CA during a surge event?
The SMDJ64CA exhibits a maximum clamping voltage (VC) of 103 V when subjected to its rated peak pulse current of 29.2 A on a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is critical for verifying safe operating margins of downstream components in any design using the SMDJ64CA.
Does the SMDJ64CA meet moisture sensitivity level (MSL) requirements for standard SMT reflow?
Yes, the SMDJ64CA is rated MSL1 per J-STD-020, with a maximum lead-free reflow peak temperature of 260 °C. This eliminates the need for pre-baking and allows direct placement into standard automated assembly processes - a verified capability documented in the official AOS datasheet for the SMDJ64CA and shared across the full SMDJ family.
What is the junction-to-lead thermal resistance of the SMDJ64CA?
The SMDJ64CA has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This low thermal resistance enables efficient heat extraction during repetitive surge events and contributes to the device's ability to sustain its 150 °C maximum junction temperature rating in real-world PCB layouts using the SMDJ64CA.
SMDJ64CA 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 29.2A
- 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
SMDJ64CA FAQ
1.How can I place an order for SMDJ64CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ64CA 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 SMDJ64CA reliable?
The price and inventory of SMDJ64CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ64CA is usually 5 days.
3.What payment methods are accepted for SMDJ64CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ64CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ64CA?
SMDJ64CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ64CA 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 SMDJ64CA?
For technical support, including SMDJ64CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ64CA requirements.
6.How does Aetrix verify that SMDJ64CA is sourced from the original manufacturer or authorized distributors?
All SMDJ64CA 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 SMDJ64CA meets industry standards.
7.What is the process for return or replacement of SMDJ64CA?
All SMDJ64CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ64CA, 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 SMDJ64CA part is unused and in its original packaging.
Return procedure for SMDJ64CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ64CA Tags
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