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Diodes Incorporated SDT8A120P5Q-7
- Part No.:
- SDT8A120P5Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- -
- Datasheet:
-
SDT8A120P5Q-7.pdf
- Description:
- SCHOTTKY RECTIFIER PDI5
- Quantity:
- Payment:
- Shipping:
Inventory:4,716
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Product details
Overview
SDT8A120P5Q-7 from Diodes Incorporated is a 120 V, 8 A trench Schottky barrier rectifier in PowerDI5 package, featuring 0.84 V max forward voltage at 8 A and 300 μA max reverse leakage at 120 V/25°C. It serves as a high-efficiency freewheel or blocking diode in automotive-grade DC-DC converters and AC-DC adapters operating up to +150°C junction temperature.
For engineers reviewing the SDT8A120P5Q-7 datasheet, SDT8A120P5Q-7 pinout, SDT8A120P5Q-7 application, or SDT8A120P5Q-7 equivalent, key selection criteria include low VF stability across temperature, AEC-Q101 qualification, thermal resistance (18 °C/W with heatsink), and PowerDI5's compact footprint for space-constrained power stages.
Technical Context
This Schottky rectifier uses trench MOS structure to achieve lower forward voltage and superior high-temperature leakage control versus planar Schottky devices. Its 120 V VRRM rating supports 48 V and 60 V bus systems with margin, while soft, fast switching minimizes EMI in high-frequency switching topologies.
The device is rated for continuous operation up to +150°C junction temperature and qualified per AEC-Q101 for automotive applications. Thermal resistance drops from 88 °C/W (FR-4 PCB) to 18 °C/W with an aluminum heatsink, enabling high-power density designs without forced air cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 120 V - blocks 120 V DC or peak AC reverse voltage reliably in 48 V/60 V power rails |
| IO (AV) | 8 A - delivers continuous 8 A average forward current at TA = +25°C with standard PCB layout |
| VF (Max) | 0.84 V @ 8 A, 25°C - reduces conduction loss by ~30% vs. comparable Si diodes, improving efficiency in 100–500 kHz converters |
| IR (Max) | 300 μA @ 120 V, 25°C - ensures low standby power loss and stable blocking in high-temp environments |
| TJ Range | −55°C to +150°C - supports under-hood automotive and industrial ambient conditions without derating |
| RθJA | 18 °C/W (with heatsink) - enables 4.2 W dissipation at ΔT = 75°C, suitable for 25–35 W power stages |
| IFSM | 150 A @ 8.3 ms - withstands typical inrush and transient surge events in adapter and converter inputs |
Pinout & Package
Package: PowerDI5 - surface-mount, thermally enhanced plastic package with exposed copper pad for low RθJA; dimensions 3.966 mm × 6.504 mm × 0.85 mm; UL 94V-0 rated; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry | Connected to input/high-side node; requires low-inductance trace routing for fast-switching integrity |
| Cathode (K) | Forward current exit / reverse blocking terminal | Connected to output/ground return; ties to thermal pad for heat extraction and EMI reduction |
| Thermal Pad (Exposed bottom) | Thermal path & mechanical anchor | Must be soldered to ≥25 mm² copper pour for RθJA ≤18 °C/W; not electrically connected |
Key Features
| Feature | Design Value |
|---|---|
| Trench Schottky architecture | Enables 0.71 V VF @ 8 A, 125°C - maintains efficiency in hot environments where planar Schottky VF rises sharply |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics - includes HTOL, TC, HAST, and UHAST stress testing |
| Soft, fast switching | Low reverse recovery charge (QRR < 25 nC, estimated from dV/dt & trr curves) - reduces switching noise and snubber losses |
| Green, RoHS-compliant construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); matte tin annealed terminals - ensures long-term solderability and environmental compliance |
| PowerDI5 thermal design | Exposed thermal pad + low-profile geometry - achieves 18 °C/W RθJA with minimal board area vs. SMA/SMB packages |
Applications
| Automotive DC-DC Converters | Industrial AC-DC Adapters |
|---|---|
Use Scenario: 12 V → 5 V/3.3 V buck converter in engine control unit (ECU) with ambient up to +105°C. IC Role / Device Role / Timing Role: Freewheel diode in synchronous rectification stage, conducting during low-side FET off-time. Use Value: 0.76 V VF @ 8 A, 25°C and stable IR < 17 μA @ 125°C ensure >92% efficiency and low standby loss over full temperature range. | Use Scenario: Secondary-side rectification in 24 V, 15 W wall adapter for factory automation I/O modules. IC Role / Device Role / Timing Role: Output blocking diode preventing backfeed during no-load or fault conditions. Use Value: 120 V VRRM provides 2× safety margin over 24 V output; PowerDI5 footprint saves >40% board area vs. SMB. |
| Telecom Power Supplies | LED Driver Circuits |
Use Scenario: OR-ing diode in redundant 48 V telecom rectifier module operating at +70°C ambient. IC Role / Device Role / Timing Role: Forward-biased blocking element ensuring current flows only from active supply. Use Value: Low VF minimizes voltage drop between supplies; 150 A IFSM handles hot-swap transients without failure. | Use Scenario: Constant-current LED string driver for outdoor signage with wide ambient swing (−40°C to +85°C). IC Role / Device Role / Timing Role: Reverse-polarity protection and flyback energy clamp during PWM dimming transitions. Use Value: Soft switching suppresses EMI spikes that interfere with analog dimming signals; −55°C to +150°C rating covers full outdoor operating envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay V8P12HM3/H | Same 120 V/8 A rating; VF = 0.82 V @ 8 A, 25°C; RθJA = 22 °C/W (heatsink); no AEC-Q101 qualification | Qualified for industrial/commercial use only; lacks PPAP documentation and automotive reliability test data | Select when AEC-Q101 is not required and cost is prioritized over automotive traceability |
| ON Semiconductor SB8120E | 120 V/8 A; VF = 0.85 V @ 8 A, 25°C; RθJA = 20 °C/W; AEC-Q101 qualified but no PPAP capability stated | Approved for automotive use but lacks formal PPAP support for Tier-1 production ramp | Select when PPAP is not mandatory and existing ON Semi supply chain integration is preferred |
Compared with V8P12HM3/H and SB8120E, SDT8A120P5Q-7 uniquely combines AEC-Q101 qualification, PPAP capability, and lowest VF at high temperature - making it the only choice for Tier-1 automotive power modules requiring full production compliance and thermal margin.
Availability
SDT8A120P5Q-7 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial AC-DC adapters, and telecom power supplies requiring stable component supply, AEC-Q101 traceability, and thermal robustness up to +150°C.
Supply support for SDT8A120P5Q-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
The SDT8A120P5Q belongs to Diodes' AEC-Q101-qualified PowerDI® Schottky rectifier product line, engineered specifically for high-efficiency, high-temperature power conversion in automotive and harsh-environment applications.
FAQ
What is the maximum junction temperature and how does it affect derating?
The SDT8A120P5Q-7 has a maximum junction temperature of +150°C. At ambient temperatures above +75°C, average forward current must be linearly derated from 8 A to zero at +150°C, per Figure 4 in DS39558. This allows reliable operation in under-hood automotive locations without active cooling.
Is the thermal pad electrically isolated and how should it be connected?
Yes, the exposed thermal pad on the PowerDI5 package is electrically isolated from both anode and cathode. It must be soldered to a dedicated thermal copper pour (minimum 25 mm²) tied to system ground or floating, depending on EMI requirements - no electrical connection is needed for thermal performance.
Does SDT8A120P5Q-7 support lead-free reflow profiles?
Yes, SDT8A120P5Q-7 is RoHS-compliant with matte tin annealed terminals and qualifies for standard lead-free reflow profiles (J-STD-020 Class 1). Peak temperature up to 260°C is supported; moisture sensitivity level is 1, eliminating bake requirements before assembly.
How does its reverse leakage compare at elevated temperature?
At TJ = +125°C and VR = 120 V, IR is specified at 17 μA max - less than 6% of its 25°C value (300 μA). This exceptional stability results from trench Schottky process control and makes it suitable for high-temp standby circuits where leakage-induced power loss must be minimized.
SDT8A120P5Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- -
- Voltage - DC Reverse (Vr) (Max):
- -
- Current - Average Rectified (Io):
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- -
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- -
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- -
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -
SDT8A120P5Q-7 FAQ
1.How can I place an order for SDT8A120P5Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT8A120P5Q-7 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 SDT8A120P5Q-7 reliable?
The price and inventory of SDT8A120P5Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT8A120P5Q-7 is usually 5 days.
3.What payment methods are accepted for SDT8A120P5Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT8A120P5Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT8A120P5Q-7?
SDT8A120P5Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT8A120P5Q-7 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 SDT8A120P5Q-7?
For technical support, including SDT8A120P5Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT8A120P5Q-7 requirements.
6.How does Aetrix verify that SDT8A120P5Q-7 is sourced from the original manufacturer or authorized distributors?
All SDT8A120P5Q-7 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 SDT8A120P5Q-7 meets industry standards.
7.What is the process for return or replacement of SDT8A120P5Q-7?
All SDT8A120P5Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with SDT8A120P5Q-7, 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 SDT8A120P5Q-7 part is unused and in its original packaging.
Return procedure for SDT8A120P5Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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Diodes Incorporated
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