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Diodes Incorporated DFLS240LQ-7
- Part No.:
- DFLS240LQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLS240LQ-7.pdf
- Description:
- DIODE SCHOTTKY 40V 2A PWRDI123
- Quantity:
- Payment:
- Shipping:
Inventory:8,249
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Product details
Overview
DFLS240LQ from Diodes Incorporated is a 2.0A, 40V low-forward-voltage Schottky barrier rectifier in PowerDI123 package, optimized for automotive polarity protection and flyback diode applications with 0.50V max VF at 2.0A and 0.1mA max IR at 40V and +25°C.
For engineers reviewing the DFLS240LQ datasheet, DFLS240LQ pinout, DFLS240LQ application, or DFLS240LQ equivalent, key selection criteria include AEC-Q101 qualification, 50A non-repetitive surge rating, 12ns reverse recovery time, thermal resistance of 6°C/W junction-to-lead, and IATF 16949 manufacturing compliance.
Technical Context
This Schottky rectifier employs guard ring die construction to enhance transient immunity and supports high-efficiency DC/DC conversion in constrained automotive power rails. Its low 0.45V typical forward voltage at 2.0A reduces conduction loss, while 90pF junction capacitance enables fast switching in 1MHz-class circuits.
The device operates across –55°C to +125°C junction temperature range and delivers 1.67W power dissipation on a 50.8mm × 50.8mm GETEK board. Thermal resistance junction-to-lead is 6°C/W, enabling direct thermal coupling to PCB copper for high-current stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in polarity protection and clamp circuits |
| IF(AV) | 2.0 A - Continuous average forward current; supports sustained 2A load paths without derating at TA ≤ 75°C |
| VF MAX | 0.50 V @ 2.0A - Low conduction loss ensures >92% efficiency in 3.3V–12V rail rectification |
| tRR | 12 ns - Fast reverse recovery minimizes switching loss in high-frequency DC/DC converters |
| RθJL | 6 °C/W - Low junction-to-lead thermal resistance enables effective heat transfer to cathode pad |
| IFS M | 50 A - Non-repetitive surge capability handles inductive kickback in motor control and solenoid drivers |
| CT | 90 pF @ 10V - Low junction capacitance preserves signal integrity in high-speed switching nodes |
Pinout & Package
Package: PowerDI123 - surface-mount, 3-pin (anode-cathode-anode) molded plastic package with matte tin annealed terminals, UL 94V-0 rated, moisture sensitivity level 1, weight ≈ 0.01 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input current entry point | Connected to positive supply or switched node; dual anode pads provide parallel current path and thermal relief |
| Cathode (Center Pin) | Output current exit point | Marked with cathode band; primary thermal path to PCB via large copper pad; RθJL = 6°C/W |
| Anode (Pin 3) | Input current entry point | Second anode terminal for balanced current sharing and reduced trace inductance in high-di/dt applications |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Enhances ESD robustness (HBM 4000V) and suppresses edge leakage during voltage transients |
| AEC-Q101 qualification | Validated for automotive underhood environments including thermal cycling, humidity, and mechanical shock |
| Lead-free & halogen-free | RoHS 3 compliant with <900ppm Br+Cl and <1000ppm Sb; meets global automotive environmental mandates |
| Low VF / high IF capability | 0.45V typ @ 2.0A enables compact thermal design in space-constrained ECUs and ADAS modules |
Applications
| Automotive Polarity Protection | DC/DC Converter Output Rectification |
|---|---|
Use Scenario: Reverse battery connection protection in 12V vehicle infotainment systems. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage to downstream PMICs and microcontrollers. Use Value: 0.50V max VF limits power loss to <1W at 2A, reducing thermal stress on PCB near connectors. | Use Scenario: Secondary-side rectification in 300kHz buck converter powering ADAS camera modules. IC Role / Device Role / Timing Role: High-speed synchronous rectifier replacement with minimal reverse recovery penalty. Use Value: 12ns tRR and 90pF CT enable clean turn-off waveforms, suppressing EMI above 30MHz. |
| Motor Flyback Suppression | USB-C Power Path Protection |
Use Scenario: Recirculating diode across brushed DC motor in HVAC actuator. IC Role / Device Role / Timing Role: Clamp inductive kickback during PWM switching to protect MOSFET drivers. Use Value: 50A IFSM withstands repeated 40A surge events without degradation over 10-year service life. | Use Scenario: Input polarity guard in USB-C PD sink designs with dual-role ports. IC Role / Device Role / Timing Role: Fail-safe reverse-voltage blocker before buck-boost controller input. Use Value: 0.1mA IR max at 40V ensures <5µW standby leakage, preserving battery runtime in always-on mode. |
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 | Higher VF (0.55V max @ 2A), TO-220AC package, no AEC-Q101 qualification | Industrial power supplies only; unsuitable for automotive due to qualification and thermal interface limitations | Select when cost-sensitive non-automotive designs require through-hole mounting and higher surge margin (100A IFSM) |
| SS24-HF | Same VF spec (0.5V max), SMA package, 1.5A IF(AV), no AEC-Q101 | Limited to consumer electronics; lower current rating and no automotive process controls | Choose for space-constrained non-automotive PCBs where 1.5A continuous rating suffices and lead-free compliance is required |
Compared with SB240-E3/54 and SS24-HF, DFLS240LQ uniquely combines AEC-Q101 qualification, PowerDI123 thermal performance (RθJL = 6°C/W), and dual-anode layout-making it the only option qualified for under-hood automotive rectification requiring 2A continuous and 50A surge capability.
Availability
DFLS240LQ is available at Aetrix Electronics and suitable for automotive ECU power management, ADAS camera module DC/DC stages, and industrial motor drive recirculation circuits requiring stable component supply and full AEC-Q101 traceability.
Supply support for DFLS240LQ 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 computing markets.
The PowerDI123 Schottky rectifier product line targets automotive-grade power conversion with emphasis on low VF, high surge tolerance, and IATF 16949 process control-designed specifically for under-hood and safety-critical DC/DC subsystems.
FAQ
Is DFLS240LQ suitable for synchronous rectification in a 500kHz buck converter?
Yes. With 12ns reverse recovery time and 90pF junction capacitance, DFLS240LQ maintains low switching loss and minimal ringing at 500kHz. Its 0.45V typical VF at 2A also reduces conduction loss versus standard silicon diodes, making it viable for asynchronous or quasi-synchronous topologies where gate drive complexity must be minimized.
What is the recommended PCB pad layout for optimal thermal performance?
Per Diodes' package outline DS37066 Rev. 5-2, use a minimum 25.4mm × 25.4mm copper pad on inner layers connected via ≥6 thermal vias (0.3mm diameter, 0.8mm pitch) to solid ground planes. The cathode pad should occupy ≥75% of the total copper area, with anode pads sized per IPC-7351B for PowerDI123 to ensure solder joint reliability and thermal transfer.
Does DFLS240LQ meet PPAP requirements for Tier 1 automotive suppliers?
Yes. DFLS240LQ is PPAP capable and manufactured in IATF 16949 certified facilities. Diodes provides full PPAP Level 3 documentation-including part submission warrant, design records, process flow diagrams, PFMEA, control plans, and dimensional reports-upon request for qualified automotive customers.
Can DFLS240LQ replace a 3A Schottky in a 12V input circuit?
No. While DFLS240LQ sustains 2.0A average forward current, its 2.0A rating is absolute-not derated. In a 12V circuit demanding 3A continuous, thermal rise exceeds safe limits even with aggressive copper heatsinking. For 3A applications, consider DFLS340LQ (3A-rated, same package) or verify junction temperature using RθJA = 135°C/W with actual board layout.
DFLS240LQ-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:
- 650 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 µA @ 20 V
- Capacitance @ Vr, F:
- 90pF @ 10V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
- Operating Temperature - Junction:
- -55°C ~ 125°C
DFLS240LQ-7 FAQ
1.How can I place an order for DFLS240LQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLS240LQ-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 DFLS240LQ-7 reliable?
The price and inventory of DFLS240LQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLS240LQ-7 is usually 5 days.
3.What payment methods are accepted for DFLS240LQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLS240LQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLS240LQ-7?
DFLS240LQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLS240LQ-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 DFLS240LQ-7?
For technical support, including DFLS240LQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLS240LQ-7 requirements.
6.How does Aetrix verify that DFLS240LQ-7 is sourced from the original manufacturer or authorized distributors?
All DFLS240LQ-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 DFLS240LQ-7 meets industry standards.
7.What is the process for return or replacement of DFLS240LQ-7?
All DFLS240LQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLS240LQ-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 DFLS240LQ-7 part is unused and in its original packaging.
Return procedure for DFLS240LQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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