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Alpha & Omega Semiconductor Inc. SMDJ7.0CA
- Part No.:
- SMDJ7.0CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ7.0CA.pdf
- Description:
- 1CH 7.0V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:7,025
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Product details
Overview
SMDJ7.0CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 7.0 V reverse stand-off voltage (VRWM), 7.78–8.60 V breakdown voltage (VBR) at 10 mA, 12.0 V maximum clamping voltage (VC) at 250 A peak pulse current, and 3000 W peak pulse power dissipation on a 10/1000 µs waveform - deployed in industrial motor drives to safeguard gate drivers against inductive switching transients.
For engineers reviewing the SMDJ7.0CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VRWM = 1.71), JEDEC DO-214AB package compatibility, thermal resistance (RθJA = 75 °C/W), and compliance with IEC 61000-4-2/4-4/4-5 surge immunity requirements.
Technical Context
The SMDJ7.0CA operates as a bi-directional avalanche diode, symmetrically clamping voltage excursions above ±7.78 V in either polarity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low temperature coefficient (0.1% × VBR/°C), enabling predictable protection across –55 °C to +150 °C operating range.
It delivers 3000 W peak pulse power handling under 10/1000 µs waveform conditions when mounted on 8.0 mm × 8.0 mm copper pads, with sub-1 ps response time from 0 V to breakdown - critical for suppressing fast ESD and lightning-induced surges before downstream ICs are damaged.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 7.0 V - Maximum continuous reverse voltage before clamping begins; sets minimum system operating margin. |
| VBR @ IT=10 mA | 7.78–8.60 V - Confirmed breakdown threshold; defines precise turn-on point for transient suppression. |
| VC @ IPPM=250 A | 12.0 V - Clamped voltage during 3000 W surge; determines maximum stress on protected circuitry. |
| PPPM (10/1000 µs) | 3000 W - Peak surge energy absorption capacity; enables single-device protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω). |
| IR @ VRWM | 200 µA - Reverse leakage at rated stand-off; ensures minimal quiescent power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in high-ambient industrial enclosures. |
| RθJA | 75 °C/W - Thermal resistance to ambient; informs heatsinking requirements for sustained surge duty cycles. |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package: molded plastic case with matte tin lead-free plating, MSL1 rating (260 °C reflow peak), UL 94V-0 flammability, and cathode band marking for polarity identification (omitted in bi-directional variants like SMDJ7.0CA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional avalanche terminals | Identical symmetrical terminals; no fixed anode/cathode - enables AC-coupled or floating rail protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded DC rails without polarity concerns. |
| Glass-passivated junction | Ensures long-term VBR stability and reduced parameter drift under thermal cycling and humidity exposure. |
| 0.01% repetition rate limit | Defines safe duty cycle for repeated surges - requires ≥100 s recovery between 3000 W events to prevent thermal runaway. |
| Sub-1 ps response time | Clamps ESD transients (IEC 61000-4-2) before propagation into sensitive analog or logic inputs. |
| Low-profile SMC package | Reduces board space vs. axial DO-15; compatible with automated pick-and-place and standard reflow profiles (J-STD-020 MSL1). |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of IGBT gate drive circuits against Miller-induced voltage spikes during high-dI/dt switching. IC Role / Device Role: Bi-directional TVS placed across gate-to-emitter terminals to clamp both positive overshoot and negative undershoot. Use Value: Prevents false turn-on and gate oxide damage by limiting transient voltage to ≤12.0 V while sustaining 250 A surge current. | Use Scenario: Safeguarding LIN bus transceivers from load dump and jump-start induced transients in 12 V vehicle networks. IC Role / Device Role: Bidirectional clamping device connected between LIN line and ground to absorb ±100 V/500 ms surges. Use Value: Maintains bus integrity during ISO 7637-2 Pulse 5a (load dump) by clamping within 12.0 V at 250 A, preserving communication uptime. |
| Programmable Logic Controllers | Renewable Energy Inverters |
Use Scenario: Input/output protection of digital I/O modules exposed to field wiring transients in factory automation environments. IC Role / Device Role: TVS on 24 V DC input lines to suppress IEC 61000-4-4 fast transients (4 kV) coupled via inductive loads. Use Value: Limits transient voltage to ≤12.0 V with <1 ps response, preventing latch-up or reset of microcontroller peripherals. | Use Scenario: DC-link overvoltage suppression in solar string inverters subjected to lightning-induced surges on PV array wiring. IC Role / Device Role: Bi-directional TVS across DC-link capacitors to clamp common-mode transients up to 3000 W. Use Value: Absorbs full IEC 61000-4-5 Level 4 (4 kV, 2 Ω source) without degradation, extending capacitor lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC7.0 | Same VRWM (7.0 V) and PPPM (3000 W), but DO-214AA package (smaller footprint, higher RθJA = 90 °C/W). | Limited surge derating above 75 °C ambient; less suitable for enclosed high-temp enclosures. | Select SAC7.0 only when board space is constrained and thermal management is enhanced externally. |
| SMCJ7.0CA | Identical electrical specs and DO-214AB package, but manufactured by Vishay; same 7.0 V VRWM, 12.0 V VC, and 250 A IPPM. | Direct second-source option with identical mechanical and electrical behavior; validated for drop-in replacement in existing designs. | Choose SMCJ7.0CA for supply chain diversification without layout or qualification changes. |
Compared with SAC7.0, SMDJ7.0CA offers superior thermal performance (RθJA = 75 vs. 90 °C/W) and broader ambient operating range; versus SMCJ7.0CA, it provides identical functionality with AOS-specific process enhancements in leakage control and VBR consistency.
Availability
SMDJ7.0CA is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, programmable logic controllers, renewable energy inverters, and factory automation systems requiring stable component supply and long-term lifecycle support.
Supply support for SMDJ7.0CA 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, IGBTs, and protection devices for power conversion and management.
The SMDJ7.0CA belongs to AOS's SMDJ series of high-power TVS diodes, engineered specifically for industrial-grade surge immunity in harsh electromagnetic environments with stringent reliability and thermal stability requirements.
FAQ
What is the clamping voltage of the SMDJ7.0CA under a 250 A surge?
The SMDJ7.0CA exhibits a maximum clamping voltage (VC) of 12.0 V when subjected to a 250 A peak pulse current on a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The SMDJ7.0CA maintains this clamping performance consistently across its operating temperature range.
Is the SMDJ7.0CA suitable for bidirectional signal line protection?
Yes, the SMDJ7.0CA is explicitly designed as a bi-directional TVS diode, with symmetrical breakdown characteristics in both polarities. Its datasheet confirms identical VBR (7.78–8.60 V) and VC (12.0 V) values for positive and negative surges, making it ideal for protecting AC-coupled interfaces such as RS-485, CAN FD, and Ethernet PHY lines. The SMDJ7.0CA does not require orientation during placement, simplifying assembly and improving design flexibility.
What is the thermal resistance of the SMDJ7.0CA, and how does it affect PCB layout?
The SMDJ7.0CA 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 thermal design: reducing pad size or omitting thermal vias increases effective RθJA, risking junction overheating during repetitive surges. To maintain reliability, the SMDJ7.0CA must be placed on adequately sized copper areas - the SMDJ7.0CA datasheet specifies these pad dimensions as mandatory for achieving rated 3000 W pulse power.
Does the SMDJ7.0CA meet RoHS and halogen-free compliance standards?
Yes, the SMDJ7.0CA is an AOS Green Product, certified RoHS-compliant and halogen-free per AOS' internal policy and industry standards (IEC 61249-2-21). It uses matte tin lead-free plating and UL 94V-0 rated molding compound. These material attributes ensure compatibility with lead-free reflow processes and environmental regulations including EU RoHS Directive 2011/65/EU and China RoHS II - confirmed in the official SMDJ7.0CA product documentation.
How does the SMDJ7.0CA compare to unidirectional TVS diodes like SMDJ7.0A?
The SMDJ7.0CA differs from the unidirectional SMDJ7.0A solely in polarity configuration: SMDJ7.0CA provides symmetrical clamping for both positive and negative transients, while SMDJ7.0A clamps only in reverse bias and conducts forward current freely. This makes the SMDJ7.0CA essential for floating or AC-coupled nodes where voltage polarity is undefined - the SMDJ7.0CA eliminates need for dual-diode arrangements and reduces BOM count in bidirectional protection schemes.
SMDJ7.0CA 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 250A
- 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
SMDJ7.0CA FAQ
1.How can I place an order for SMDJ7.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ7.0CA 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 SMDJ7.0CA reliable?
The price and inventory of SMDJ7.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ7.0CA is usually 5 days.
3.What payment methods are accepted for SMDJ7.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ7.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ7.0CA?
SMDJ7.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ7.0CA 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 SMDJ7.0CA?
For technical support, including SMDJ7.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ7.0CA requirements.
6.How does Aetrix verify that SMDJ7.0CA is sourced from the original manufacturer or authorized distributors?
All SMDJ7.0CA 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 SMDJ7.0CA meets industry standards.
7.What is the process for return or replacement of SMDJ7.0CA?
All SMDJ7.0CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ7.0CA, 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 SMDJ7.0CA part is unused and in its original packaging.
Return procedure for SMDJ7.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ7.0CA Tags
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