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Alpha & Omega Semiconductor Inc. SMDJ5.0CA
- Part No.:
- SMDJ5.0CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ5.0CA.pdf
- Description:
- 1CH 5.0V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:6,908
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Product details
Overview
SMDJ5.0CA from Alpha & Omega Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMC J-Bend) package, designed for robust ESD and surge protection in DC power rails and signal lines. It features 5.0 V reverse stand-off voltage, 6.4–7.0 V breakdown voltage at 10 mA, 9.2 V maximum clamping voltage at 326.1 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform.
For engineers reviewing the SMDJ5.0CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.38), JEDEC DO-214AB thermal performance (RθJA = 75 °C/W), and compliance with IEC 61000-4-2/4-5 for industrial and automotive board-level surge immunity.
Technical Context
The SMDJ5.0CA operates as a voltage-clamped avalanche diode, responding in under 1.0 ps to transients and delivering symmetrical clamping in both polarities due to its bi-directional construction. Its glass-passivated junction ensures stable VBR tolerance (±5% typical) and low temperature coefficient (0.1% × VBR per °C ΔT).
Designed for surface-mount mounting on 8.0 mm × 8.0 mm copper pads, it sustains 300 A non-repetitive forward surge (8.3 ms half-sine) and maintains operation across –55 °C to +150 °C junction temperature range, with MSL Level 1 moisture sensitivity and UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=10 mA | 6.4–7.0 V - Confirmed breakdown threshold ensuring reliable turn-on during overvoltage events |
| VC @ IPPM=326.1 A | 9.2 V - Clamping voltage limits downstream IC stress to safe levels during 3000 W surges |
| PPPM (10/1000 µs) | 3000 W - Peak surge energy handling capacity for IEC 61000-4-5 Level 4 compliance |
| TJ Range | –55 to +150 °C - Enables use in under-hood automotive and industrial environments |
| Polarity | Bi-directional - Protects AC-coupled or floating signal paths without polarity constraints |
| Package | DO-214AB (SMC J-Bend) - Standardized footprint with strain relief and 260 °C reflow compatibility |
Pinout & Package
DO-214AB (SMC J-Bend) package: molded plastic case with matte tin lead-free plating, cathode band marking for unidirectional variants; for SMDJ5.0CA (bi-directional), no polarity marking is used - terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identical clamping roles - no fixed anode/cathode; enables placement without orientation check |
| Case / Body | Thermal and mechanical interface | Plastic body provides electrical isolation while enabling heat transfer via copper pad mounting |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Limits voltage overshoot before protection engages, critical for high-speed data line protection |
| Clamping ratio (VC/VBR) | ≈1.38 - Low ratio minimizes protected circuit voltage excursion during surge events |
| Thermal resistance (Junction-to-Lead) | 15 °C/W - Supports high pulse repetition when mounted on adequate copper area |
| MSL Level 1 | Peak reflow up to 260 °C - Eliminates pre-bake requirement for standard SMT assembly |
| Glass passivated junction | Stable VBR over life and temperature - Reduces calibration drift in precision power monitoring circuits |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24 V DC digital input channels against load dump and inductive switching transients in programmable logic controllers. IC Role / Device Role / Timing Role: Bi-directional TVS clamp placed between field wiring and optocoupler input, absorbing ±1 kV/50 Ω surge pulses. Use Value: Prevents optocoupler damage and false triggering by limiting transient voltage to ≤9.2 V while sustaining 3000 W peak power. | Use Scenario: Safeguarding LIN bus transceivers and sensor supply lines against battery reverse connection and jump-start spikes in BCM subassemblies. IC Role / Device Role / Timing Role: Primary surge limiter on 12 V rail and LIN signal lines, operating bidirectionally to handle both positive and negative transients. Use Value: Maintains signal integrity during 10/1000 µs surges up to 326 A without degradation, validated per ISO 7637-2 Pulse 1/2/5a. |
| Telecom Power Feeds | Renewable Energy Inverter DC Link |
Use Scenario: Overvoltage suppression on -48 V DC telecom power distribution boards exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Front-end TVS on primary DC input, coordinated with upstream MOVs to share energy and extend system lifetime. Use Value: Delivers 3000 W peak power dissipation with low clamping voltage, reducing thermal stress on downstream DC/DC converters. | Use Scenario: Transient protection on photovoltaic string inputs of solar inverters subject to rapid voltage reversals and grid fault coupling. IC Role / Device Role / Timing Role: Bidirectional clamp across PV+ and PV− terminals, suppressing differential-mode surges up to 6 kV (IEC 61000-4-5) Use Value: Withstands repeated 300 A surges without parameter shift, verified over 1000+ cycles at 0.01% duty cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC5.0 | Same DO-214AB package, but unidirectional; VRWM = 5.0 V, VC = 9.2 V, but only clamps in one polarity | Requires explicit polarity alignment; unsuitable for AC or floating nodes | Select SAC5.0 only when circuit topology guarantees consistent voltage polarity and space constraints favor identical footprint |
| SMDJ5.0A | Unidirectional variant of same family; identical VRWM, VBR, VC, and PPPM, but single-polarity conduction | Cannot protect bidirectional signals or reverse-connected supplies without additional components | Choose SMDJ5.0A where cost optimization is prioritized and polarity is strictly controlled, e.g., regulated 5 V rail output protection |
Compared with SAC5.0 and SMDJ5.0A, the SMDJ5.0CA provides true bidirectional clamping without layout or BOM changes - essential for differential buses, AC-coupled interfaces, and systems requiring polarity-agnostic surge resilience.
Availability
SMDJ5.0CA is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and telecom power feed applications requiring stable component supply, RoHS-compliant packaging, and traceable sourcing.
Supply support for SMDJ5.0CA 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, TVS diodes, and power ICs for computing, consumer, industrial, and automotive markets.
The SMDJ series is engineered specifically for high-power, surface-mount transient suppression - targeting design-in in harsh-environment systems where reliability, compactness, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMDJ5.0CA at its rated peak pulse current?
The SMDJ5.0CA has a maximum clamping voltage (VC) of 9.2 V when subjected to its peak pulse current of 326.1 A on a 10/1000 µs waveform. This value is measured under standardized test conditions per JEDEC and ensures predictable overvoltage limiting for downstream circuitry. The SMDJ5.0CA maintains this clamping performance consistently across its specified operating temperature range.
Is SMDJ5.0CA unidirectional or bidirectional, and how does that affect PCB layout?
SMDJ5.0CA is a bi-directional TVS diode, meaning it clamps voltage transients equally in both polarities without requiring orientation-specific placement. Unlike unidirectional variants such as SMDJ5.0A, the SMDJ5.0CA has no cathode band marking and can be mounted in either direction - simplifying layout, reducing assembly errors, and enabling use on AC-coupled or floating signal paths.
What is the thermal resistance of SMDJ5.0CA, and how does it impact surge handling?
The SMDJ5.0CA has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. These values directly determine its ability to dissipate 3000 W surge energy without exceeding the 150 °C maximum junction temperature - underscoring the necessity of proper PCB copper area for sustained reliability.
Does SMDJ5.0CA meet industry standards for surge immunity testing?
Yes, the SMDJ5.0CA is designed to support compliance with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) standards. Its 3000 W peak pulse power rating on 10/1000 µs waveform aligns with Level 4 (4 kV line-to-earth, 2 kV line-to-line) requirements. System-level validation remains the customer's responsibility, but the SMDJ5.0CA provides the foundational clamping performance needed for certification.
What is the maximum reverse leakage current of SMDJ5.0CA at its rated VRWM?
At its reverse stand-off voltage (VRWM) of 5.0 V, the SMDJ5.0CA exhibits a maximum reverse leakage current (IR) of 800 µA at 25 °C ambient. For bidirectional devices with VRWM ≤ 10 V, this limit is doubled per datasheet note - confirming suitability for low-power standby circuits where leakage must remain below 1 mA without compromising protection integrity. The SMDJ5.0CA maintains this spec across its full operating temperature range.
SMDJ5.0CA 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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 326.1A
- 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
SMDJ5.0CA FAQ
1.How can I place an order for SMDJ5.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ5.0CA 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 SMDJ5.0CA reliable?
The price and inventory of SMDJ5.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ5.0CA is usually 5 days.
3.What payment methods are accepted for SMDJ5.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ5.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ5.0CA?
SMDJ5.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ5.0CA 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 SMDJ5.0CA?
For technical support, including SMDJ5.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ5.0CA requirements.
6.How does Aetrix verify that SMDJ5.0CA is sourced from the original manufacturer or authorized distributors?
All SMDJ5.0CA 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 SMDJ5.0CA meets industry standards.
7.What is the process for return or replacement of SMDJ5.0CA?
All SMDJ5.0CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ5.0CA, 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 SMDJ5.0CA part is unused and in its original packaging.
Return procedure for SMDJ5.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ5.0CA Tags
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