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Alpha & Omega Semiconductor Inc. SMDJ6.5CA
- Part No.:
- SMDJ6.5CA
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ6.5CA.pdf
- Description:
- 1CH 6.5V BIDIRECTIONAL 3000W SMD
- Quantity:
- Payment:
- Shipping:
Inventory:7,811
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Product details
Overview
SMDJ6.5CA 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 6.5 V reverse stand-off voltage (VRWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 11.2 V maximum clamping voltage (VC) at 267.9 A peak pulse current, and 3000 W peak pulse power rating on 10/1000 µs waveform.
For engineers reviewing the SMDJ6.5CA datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.48), JEDEC DO-214AB surface-mount compatibility, and compliance with IEC 61000-4-2/4-5 for ESD and surge immunity in industrial and automotive power rails.
Technical Context
The SMDJ6.5CA operates as a bi-directional avalanche diode, providing symmetrical clamping in both polarities without external polarity biasing. Its glass-passivated junction ensures stable VBR tolerance (±5% typical) and low temperature coefficient (0.1% × VBR/°C), enabling predictable performance across –55°C to +150°C operating range.
It delivers fast response (<1.0 ps from 0 V to VBR) and meets MSL Level 1 per J-STD-020 (260°C reflow peak), supporting automated PCB assembly. The 15°C/W junction-to-lead thermal resistance allows effective heat dissipation when mounted on 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC blocking level. |
| VBR @ IT=10 mA | 7.22–7.98 V - Breakdown occurs within this range; ensures reliable turn-on during transients while avoiding false triggering. |
| VC @ IPPM | 11.2 V - Clamped voltage at 267.9 A peak pulse; limits downstream IC stress during 10/1000 µs surges. |
| PPPM | 3000 W - Peak pulse power handling on standard 10/1000 µs waveform; supports high-energy lightning/surge events. |
| IR @ VRWM | 500 µA - Reverse leakage at rated stand-off; low enough to avoid system power loss in battery-powered applications. |
| TJ max | +150°C - Maximum junction temperature; enables operation in under-hood automotive or industrial enclosures. |
| Package | DO-214AB (SMC J-Bend) - Industry-standard surface-mount outline with strain relief; compatible with automated pick-and-place and reflow. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with J-bend leads; cathode band denotes polarity for unidirectional variants, but SMDJ6.5CA is bi-directional and has no functional polarity marking-both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional clamping node | Either terminal connects to protected line; no orientation required during placement-reduces assembly error risk. |
| Case / Body | Thermal path & mechanical anchor | Plastic body transfers heat to PCB copper; J-bend leads provide mechanical strain relief against board flexure. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN FD) without polarity constraints. |
| 3000 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV line-earth surge) on properly laid-out PCBs with 8 mm² copper pads. |
| Fast response time <1.0 ps | Clamps before transient energy couples into sensitive analog or digital circuitry-critical for protecting USB, Ethernet PHYs, and MCU I/O. |
| Glass-passivated junction | Ensures long-term VBR stability and low leakage drift over temperature and lifetime-key for automotive 15-year reliability targets. |
| MSL Level 1 rating | Supports lead-free reflow up to 260°C peak without popcorn cracking or parameter shift-eliminates pre-bake requirements. |
Applications
| Industrial Motor Drives | Automotive Power Distribution |
|---|---|
Use Scenario: Protection of 12 V DC power inputs in variable-frequency drives against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Primary surge clamp placed upstream of DC-DC converters and gate drivers. Use Value: Limits transient voltage to ≤11.2 V, preventing latch-up or overvoltage damage to 16 V-rated input stages. | Use Scenario: Clamp on LIN bus or body control module power rail exposed to ISO 7637-2 Pulse 1/2/5a surges. IC Role / Device Role / Timing Role: Bi-directional TVS absorbing negative-going load dump and positive-going alternator spikes. Use Value: Symmetrical clamping eliminates need for dual unidirectional devices-reducing BOM count and PCB area by 50%. |
| Telecom Data Line Protection | Renewable Energy Inverters |
Use Scenario: Surge protection on RS-485 communication lines in outdoor base stations subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground transient suppressor placed at connector interface. Use Value: 3000 W rating handles multi-kA induced currents; low clamping voltage preserves signal integrity for 12 Mbps differential signaling. | Use Scenario: DC link protection in solar microinverters where PV string voltages can exceed 600 V during fault conditions. IC Role / Device Role / Timing Role: Secondary overvoltage clamp on auxiliary 12 V control supply, complementing primary MOV-based protection. Use Value: Fast <1 ps response prevents voltage overshoot from propagating to isolated gate drivers and MCU power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC5.0CA (Littelfuse) | Same DO-214AB package, 5.0 V VRWM, lower PPPM (1500 W), higher VC (9.6 V @ 156 A) | Lower power handling limits use to sub-2 kV IEC 61000-4-5 environments; suitable for cost-sensitive consumer electronics. | Select when system surge threat level is ≤Level 3 and board space allows slightly higher clamping voltage. |
| SMLJ6.5A (Bourns) | Unidirectional variant in same DO-214AB package; identical VRWM/VBR/VC but requires correct polarity orientation during layout. | Requires explicit anode/cathode routing-adds design complexity in floating or AC-coupled circuits. | Choose only if unidirectional behavior is intentionally leveraged (e.g., DC power rail with known polarity). |
Compared with SAC5.0CA and SMLJ6.5A, the SMDJ6.5CA provides higher surge robustness (3000 W vs. 1500 W) and polarity-agnostic placement-making it optimal for high-reliability industrial and automotive applications where layout flexibility and worst-case surge margin are critical.
Availability
SMDJ6.5CA is available at Aetrix Electronics and suitable for industrial motor drives, automotive power distribution modules, telecom data line protection, and renewable energy inverters requiring stable component supply and full traceability.
Supply support for SMDJ6.5CA 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' high-power TVS portfolio, engineered specifically for demanding surge immunity in 12–48 V DC systems where reliability under repeated transient stress is mandatory.
FAQ
What is the clamping voltage of the SMDJ6.5CA under a 10/1000 µs surge?
The SMDJ6.5CA has a maximum clamping voltage (VC) of 11.2 V when subjected to its rated peak pulse current of 267.9 A on the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected downstream circuitry sees no more than 11.2 V during such transients-critical for safeguarding 12 V logic and analog components. The SMDJ6.5CA maintains this clamping performance across its full operating temperature range.
Is the SMDJ6.5CA unidirectional or bi-directional, and how does that affect PCB layout?
The SMDJ6.5CA is a bi-directional TVS diode, meaning it clamps symmetrically for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMDJ6.5A), it has no designated anode or cathode-either terminal may connect to the protected line. This eliminates polarity-checking during assembly and simplifies layout for AC-coupled or floating interfaces like RS-485 or CAN, where signal inversion or ground shifts could otherwise cause misapplication of unidirectional devices.
What is the maximum junction temperature and thermal resistance of the SMDJ6.5CA?
The SMDJ6.5CA has a maximum junction temperature (TJ max) of +150°C and 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, it achieves sufficient heat dissipation to sustain repeated surge events without thermal runaway. This thermal performance supports operation in under-hood automotive environments and enclosed industrial enclosures where ambient temperatures exceed 85°C.
Does the SMDJ6.5CA meet RoHS and halogen-free compliance standards?
Yes, the SMDJ6.5CA is an AOS Green Product: it is fully RoHS compliant, lead-free, and halogen-free per AOS' Green Policy (documented at aosmd.com/media/AOSGreenPolicy.pdf). Its matte tin lead finish meets J-STD-020 MSL Level 1 requirements for lead-free reflow, and the molded plastic package carries UL 94V-0 flammability rating-ensuring environmental and safety compliance for global electronics manufacturing.
How does the SMDJ6.5CA compare to lower-voltage TVS diodes like SMDJ5.0CA in terms of surge handling?
The SMDJ6.5CA offers higher reverse stand-off voltage (6.5 V vs. 5.0 V) and tighter VBR tolerance (7.22–7.98 V vs. 6.40–7.00 V), making it better suited for 12 V nominal systems where margin above normal rail voltage is needed to avoid false triggering. While both share the same 3000 W PPPM rating, the SMDJ6.5CA's higher clamping voltage (11.2 V vs. 9.2 V) trades off slightly higher let-through voltage for improved DC blocking headroom-ideal for applications with noisy 12 V supplies or wide input voltage ranges.
SMDJ6.5CA 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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 267.9A
- 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
SMDJ6.5CA FAQ
1.How can I place an order for SMDJ6.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ6.5CA 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 SMDJ6.5CA reliable?
The price and inventory of SMDJ6.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ6.5CA is usually 5 days.
3.What payment methods are accepted for SMDJ6.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ6.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ6.5CA?
SMDJ6.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ6.5CA 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 SMDJ6.5CA?
For technical support, including SMDJ6.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ6.5CA requirements.
6.How does Aetrix verify that SMDJ6.5CA is sourced from the original manufacturer or authorized distributors?
All SMDJ6.5CA 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 SMDJ6.5CA meets industry standards.
7.What is the process for return or replacement of SMDJ6.5CA?
All SMDJ6.5CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ6.5CA, 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 SMDJ6.5CA part is unused and in its original packaging.
Return procedure for SMDJ6.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ6.5CA Tags
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