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Alpha & Omega Semiconductor Inc. SMDJ8.0A
- Part No.:
- SMDJ8.0A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ8.0A.pdf
- Description:
- 1CH 8.0V UNIDIRECTIONAL 3000W SM
- Quantity:
- Payment:
- Shipping:
Inventory:5,462
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Product details
Overview
SMDJ8.0A from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor diode designed for high-energy surge protection in DC power rails and signal lines. It features 8.0 V reverse standoff voltage, 8.89–9.83 V breakdown voltage at 1 mA test current, 13.6 V maximum clamping voltage at 220.6 A peak pulse current, and 3000 W peak pulse power dissipation on 10/1000 µs waveform - deployed in industrial motor drives to protect IGBT gate drivers from inductive switching transients.
For engineers reviewing the SMDJ8.0A datasheet, pinout, applications, or equivalent options, key selection considerations include its DO-214AB (SMC) package thermal resistance (RθJL = 15 °C/W), unidirectional polarity with cathode band marking, 50 µA max reverse leakage at VRWM, and compliance with J-STD-020 MSL Level 1 reflow profile.
Technical Context
The SMDJ8.0A operates as a silicon avalanche diode optimized for fast clamping of transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics, while the low-profile DO-214AB package enables high-power density surface-mount placement on 8.0 mm × 8.0 mm copper pads per terminal.
It delivers sub-1 ps response time from 0 V to breakdown, supports 0.01% duty cycle repetitive surges, and maintains clamping performance across -55 °C to +150 °C operating junction temperature range - validated under standardized 10/1000 µs waveform testing per REA definitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 8.0 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit DC rail. |
| VBR @ IT=1 mA | 8.89–9.83 V - Measured breakdown range confirms tight tolerance for precise overvoltage thresholding. |
| Vc @ IPPM | 13.6 V - Clamping voltage at 220.6 A peak pulse defines worst-case voltage seen by downstream ICs during surge. |
| PPPM (10/1000 µs) | 3000 W - Peak pulse power rating determines energy absorption capability for lightning or ESD events. |
| IR @ VRWM | 50 µA - Reverse leakage current ensures minimal standby power loss and signal integrity in high-impedance nodes. |
| TJ max | +150 °C - Maximum junction temperature enables operation in enclosed industrial enclosures without forced cooling. |
| RθJL | 15 °C/W - Thermal resistance from junction to lead allows accurate power derating when mounted on specified copper pads. |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with molded plastic case, matte tin lead-free plating, and cathode indicated by color band on one end. Terminals are solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to circuit ground or return path; forms current path during reverse-biased clamping event. |
| Cathode | Protected line input | Marked with color band; connected to line being protected (e.g., 12 V supply rail); conducts avalanche current during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables clamping before sensitive logic or analog circuitry experiences damaging voltage overshoot. |
| Glass passivated junction | Stable VBR drift <0.1% × VBR/°C - Ensures consistent clamping threshold across temperature in automotive engine control units. |
| Built-in strain relief | Reduces mechanical stress on solder joints during thermal cycling - improves long-term reliability in outdoor telecom base stations. |
| MSL Level 1 rating | Compatible with peak reflow up to 260 °C - Supports standard lead-free assembly without pre-baking or special handling. |
| UL 94V-0 flammability | Self-extinguishing plastic housing - Meets safety requirements for enclosed industrial power supplies and medical auxiliary circuits. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate driver ICs against inductive kickback from IGBTs during PWM switching. IC Role / Device Role / Timing Role: Unidirectional TVS clamps negative-going transients on isolated 15 V gate supply rail. Use Value: Limits voltage excursion to ≤13.6 V, preventing gate oxide breakdown in high-side drivers rated for 20 V absolute max. | Use Scenario: Surge suppression on LIN bus lines exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standby protector on 12 V LIN transceiver VCC pin, activated only during >8.0 V transients. Use Value: Withstands 3000 W pulses without degradation, maintaining <50 µA leakage during normal 12 V operation. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Input-stage protection for 48 V DC-DC converters in remote radio units. IC Role / Device Role / Timing Role: Primary clamp on bulk input capacitor node, absorbing lightning-induced surges coupled via long feeder cables. Use Value: 220.6 A peak pulse current capacity handles IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) surges up to 4 kV. | Use Scenario: DC link overvoltage protection in solar string inverters during rapid MPPT transitions. IC Role / Device Role / Timing Role: Parallel-mounted TVS on 600 V DC bus to clamp switching spikes from SiC MOSFETs. Use Value: Low RθJL (15 °C/W) enables effective heat transfer to heatsink-mounted PCB copper, sustaining repeated 10/1000 µs events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC8.0 | Same DO-214AB package, but lower PPPM (1500 W) and higher Vc (14.5 V at 150 A). | Not suitable for 3000 W surge environments like industrial motor drives; limited to lower-energy data lines. | Select SMDJ8.0A when full 3000 W IEC 61000-4-5 compliance is required; SAC8.0 fits cost-sensitive consumer electronics. |
| SMCJ8.0A | Identical electrical specs and DO-214AB package, but manufactured by Vishay; same 8.0 V VRWM, 13.6 V Vc, 220.6 A IPPM. | No functional difference; qualified for identical applications including automotive and telecom infrastructure. | SMCJ8.0A offers second-source availability; SMDJ8.0A provides AOS-specific supply chain continuity and green RoHS/Halogen-free compliance. |
Compared with SAC8.0 and SMCJ8.0A, the SMDJ8.0A delivers full 3000 W surge handling in the same footprint as SMCJ8.0A while exceeding SAC8.0's energy rating by 100%, making it the preferred choice for high-reliability industrial power systems requiring verified 10/1000 µs waveform immunity.
Availability
SMDJ8.0A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and renewable energy inverters requiring stable component supply and full traceability.
Supply support for SMDJ8.0A 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 SMDJ series is part of AOS's transient voltage suppressor portfolio, engineered specifically for robust, high-power surge immunity in harsh industrial and automotive environments with strict thermal and reliability requirements.
FAQ
What is the maximum clamping voltage of the SMDJ8.0A under peak pulse conditions?
The SMDJ8.0A has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak pulse current of 220.6 A on a 10/1000 µs waveform. This value is measured at the device terminals under standardized test conditions with 8.0 mm × 8.0 mm copper pads per lead, ensuring predictable overvoltage limiting for downstream components in the SMDJ8.0A-protected circuit.
Is the SMDJ8.0A suitable for bidirectional transient suppression?
No, the SMDJ8.0A is a unidirectional TVS diode, indicated by the "A" suffix and single cathode band marking. For bidirectional operation, the SMDJ8.0CA variant must be used - it provides symmetrical clamping in both polarities and is electrically characterized in both directions per the datasheet. The SMDJ8.0A itself only clamps reverse-voltage transients and conducts forward current like a standard diode.
What is the thermal resistance from junction to lead (RθJL) for the SMDJ8.0A?
The SMDJ8.0A has a typical thermal resistance from junction to lead (RθJL) of 15 °C/W, measured under standard mounting conditions using 8.0 mm × 8.0 mm copper pads per terminal. This parameter enables accurate thermal derating calculations for continuous power dissipation and validates safe operation up to +150 °C junction temperature in the SMDJ8.0A's intended applications.
Does the SMDJ8.0A meet lead-free and RoHS compliance requirements?
Yes, the SMDJ8.0A is an AOS Green Product: fully RoHS compliant, halogen-free, and features matte tin lead-free plating per JEDEC standards. It meets J-STD-020 MSL Level 1 reflow specifications with a maximum peak temperature of 260 °C, and carries UL 94V-0 flammability rating - all confirmed in the official AOS datasheet Rev. 1.2 (July 2021) for the SMDJ8.0A.
How does the SMDJ8.0A compare to the SMDJ8.0CA in terms of marking and polarity?
The SMDJ8.0A is marked "PDR" and features a single cathode band indicating polarity, confirming unidirectional operation. In contrast, the SMDJ8.0CA is marked "DDR" and lacks a polarity band, reflecting its bidirectional symmetry. Both share identical DO-214AB packaging and core electrical ratings, but the SMDJ8.0A must be oriented correctly in-circuit, whereas the SMDJ8.0CA may be placed without orientation concern - a critical distinction when selecting or substituting the SMDJ8.0A.
SMDJ8.0A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 220.6A
- 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
SMDJ8.0A FAQ
1.How can I place an order for SMDJ8.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ8.0A 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 SMDJ8.0A reliable?
The price and inventory of SMDJ8.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ8.0A is usually 5 days.
3.What payment methods are accepted for SMDJ8.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ8.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ8.0A?
SMDJ8.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ8.0A 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 SMDJ8.0A?
For technical support, including SMDJ8.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ8.0A requirements.
6.How does Aetrix verify that SMDJ8.0A is sourced from the original manufacturer or authorized distributors?
All SMDJ8.0A 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 SMDJ8.0A meets industry standards.
7.What is the process for return or replacement of SMDJ8.0A?
All SMDJ8.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ8.0A, 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 SMDJ8.0A part is unused and in its original packaging.
Return procedure for SMDJ8.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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