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Diodes Incorporated DFLS240Q-7
- Part No.:
- DFLS240Q-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLS240Q-7.pdf
- Description:
- DIODE SCHOTTKY 40V 2A PWRDI123
- Quantity:
- Payment:
- Shipping:
Inventory:2,728
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Product details
Overview
DFLS240Q from Diodes Incorporated is a 2.0A surface-mount Schottky barrier rectifier in PowerDI123 package, rated for 40V peak repetitive reverse voltage, with max forward voltage of 0.7V at 2.0A and max leakage current of 20µA at 40V/25°C. It serves as a low-loss, high-efficiency rectifier in automotive power rails, DC-DC converter outputs, and reverse polarity protection circuits.
For engineers reviewing the DFLS240Q datasheet, DFLS240Q pinout, DFLS240Q application, or DFLS240Q equivalent, key selection criteria include its AEC-Q101 qualification, 40A non-repetitive surge capability, guard ring die construction for transient immunity, and compatibility with lead-free reflow profiles per J-STD-020 Level 1.
Technical Context
This Schottky rectifier uses a planar guard ring die structure to suppress edge breakdown and improve surge robustness. Its interlocking clip design enhances thermal path integrity and enables 40A IFSM under 8.3ms half-sine surge conditions.
It operates across –65°C to +125°C junction temperature range with RθJS = 13°C/W to solder point, supporting high-density automotive PCB layouts where thermal management is constrained by small copper area and no heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum allowable reverse voltage before breakdown; sets system-level overvoltage margin in 12V/24V automotive supply paths. |
| IF(AV) | 2.0 A - Continuous average forward current rating at TA = 25°C; derates to ~1.2A at 100°C ambient per Fig. 4. |
| VF (max) | 0.7 V @ 2.0A - Low conduction loss reduces power dissipation and improves efficiency in 5–12V output rectification stages. |
| IR (max) | 20 µA @ 40V/25°C - Ultra-low leakage preserves battery standby time in always-on vehicle modules. |
| IFSM | 40 A @ 8.3ms - Withstands load dump transients and hot-swap events without failure in AEC-Q101-compliant systems. |
| RθJS | 13 °C/W - Junction-to-solder-point thermal resistance enables direct thermal coupling to PCB copper, critical for compact ECU designs. |
Pinout & Package
Package: PowerDI123 - Surface-mount, single-ended, 2-terminal plastic package with cathode band marking and matte tin-plated copper leadframe. Dimensions: 3.70 × 1.78 × 0.98 mm (L × W × H), weight ≈ 0.018 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry node | Connected to input/source side (e.g., battery+, converter secondary); requires adequate trace width for 2A continuous flow. |
| Cathode | Forward current exit node / reverse blocking terminal | Marked with band; ties to load/GND; serves as primary thermal interface to PCB copper pour via exposed tab. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche, enabling stable 40V blocking with <20µA leakage at full rating and improved ESD robustness. |
| Interlocking clip design | Increases mechanical bond strength between die and leadframe, sustaining 40A surge without delamination or bond lift. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD testing per stress test plan; PPAP-capable with IATF16949 manufacturing. |
| Halogen & antimony free | Meets "Green" definition: Br+Cl <1500ppm, Sb <1000ppm; supports EU ELV and OEM sustainability requirements. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24V DC-DC Converter Output |
|---|---|
Use Scenario: Reverse polarity protection on 12V supply input to microcontroller-based lighting control unit. IC Role / Device Role / Timing Role: Unidirectional blocking diode preventing damage during battery misconnection. Use Value: 0.7V VF minimizes voltage drop and heat generation at 2A peak load, preserving MCU brown-out margin and eliminating need for heatsink. | Use Scenario: Output rectification in isolated 24V-to-5V flyback converter powering PLC I/O circuitry. IC Role / Device Role / Timing Role: High-frequency synchronous rectifier replacement with lower conduction loss than standard PN diode. Use Value: 20µA IR at 25°C ensures minimal standby loss; 40A IFSM withstands output short-circuit recovery surges. |
| USB-C Power Delivery Protection | Smart Rearview Mirror Power Input |
Use Scenario: Input protection diode on 20V PD source line feeding USB-C port controller and Type-C interface IC. IC Role / Device Role / Timing Role: Blocking diode isolating upstream PD source from downstream fault conditions. Use Value: PowerDI123 footprint allows placement near connector; 40V VRRM covers full PD 20V ±10% tolerance plus margin. | Use Scenario: Reverse battery connection protection in automotive rearview mirror with integrated display and camera. IC Role / Device Role / Timing Role: Series protection element on main 12V rail feeding display driver and image sensor. Use Value: AEC-Q101 qualification ensures reliability over 15-year vehicle lifetime; RθJS = 13°C/W enables operation at 105°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB240-E3/54 (Vishay) | Same 40V/2A rating but DO-214AA package; VF = 0.85V @ 2A; no AEC-Q101 qualification. | Not suitable for automotive production; limited to industrial/commercial use only. | Select only if AEC-Q101 compliance is not required and board space permits larger DO-214AA footprint. |
| SS24 (ON Semiconductor) | 40V/2A, SMA package; VF = 0.55V @ 2A; IR = 500µA @ 40V - 25× higher leakage than DFLS240Q. | Higher leakage may compromise battery drain in always-on modules; not qualified for automotive. | Prefer only in cost-sensitive consumer applications where standby current is non-critical and thermal constraints are relaxed. |
Compared with SB240-E3/54 and SS24, the DFLS240Q delivers superior automotive-grade reliability, lowest leakage for battery-sensitive systems, and smallest footprint among qualified 2A Schottky rectifiers - making it optimal for space-constrained, safety-critical vehicle electronics.
Availability
DFLS240Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24V DC-DC converters, and USB-C power delivery protection circuits requiring stable component supply and long-term lifecycle support.
Supply support for DFLS240Q 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The DFLS240Q belongs to Diodes' PowerDI® Schottky rectifier family, engineered specifically for high-reliability automotive and industrial power conversion where low VF, low IR, and AEC-Q101 compliance are mandatory.
FAQ
Is the DFLS240Q suitable for reflow soldering using lead-free processes?
Yes. The DFLS240Q features matte tin finish on copper leadframe and is rated for lead-free reflow per J-STD-020 Level 1 moisture sensitivity. Its PowerDI123 package withstands peak temperatures up to 260°C for ≤60 seconds, compatible with standard Pb-free SAC305 profiles.
What is the maximum operating temperature for continuous 2.0A current?
At 2.0A average forward current, the DFLS240Q must be operated below 75°C ambient temperature to maintain TJ ≤ 125°C, based on RθJA = 73°C/W and typical power dissipation of ~1.4W. Derating curves in Fig. 4 confirm 1.2A limit at 100°C ambient.
Does the DFLS240Q have a specified total capacitance value?
Yes. Total capacitance CT is 28 pF at VR = 10V and f = 1.0 MHz (typical), per Electrical Characteristics table. This low capacitance supports high-frequency switching applications such as 100–500 kHz DC-DC converters without significant switching loss penalty.
How is polarity identified on the DFLS240Q package?
Polarity is marked by a cathode band on the top surface of the PowerDI123 package. In bottom view, the cathode connects to the large exposed metal tab; the anode is the smaller lead opposite the band. Pin 1 (cathode) is unambiguously indicated per Diodes' marking standard F04A.
DFLS240Q-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- POWERDI®123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 20 µA @ 40 V
- Capacitance @ Vr, F:
- 28pF @ 10V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
- Operating Temperature - Junction:
- -65°C ~ 125°C
DFLS240Q-7 FAQ
1.How can I place an order for DFLS240Q-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLS240Q-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 DFLS240Q-7 reliable?
The price and inventory of DFLS240Q-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLS240Q-7 is usually 5 days.
3.What payment methods are accepted for DFLS240Q-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLS240Q-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLS240Q-7?
DFLS240Q-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLS240Q-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 DFLS240Q-7?
For technical support, including DFLS240Q-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLS240Q-7 requirements.
6.How does Aetrix verify that DFLS240Q-7 is sourced from the original manufacturer or authorized distributors?
All DFLS240Q-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 DFLS240Q-7 meets industry standards.
7.What is the process for return or replacement of DFLS240Q-7?
All DFLS240Q-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLS240Q-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 DFLS240Q-7 part is unused and in its original packaging.
Return procedure for DFLS240Q-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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