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Diodes Incorporated DFLS240L-7
- Part No.:
- DFLS240L-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLS240L-7.pdf
- Description:
- DIODE SCHOTTKY 40V 2A PWRDI123
- Quantity:
- Payment:
- Shipping:
Inventory:18,888
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Product details
Overview
DFLS240L-7 from Diodes Incorporated is a 2.0A, 40V low forward-voltage Schottky barrier rectifier in PowerDI123 package, featuring 0.45V VF at 2.0A, 50A non-repetitive surge capability, and guard ring die construction for transient protection. It serves as a high-efficiency output rectifier in DC/DC converters and USB power delivery circuits.
For engineers reviewing the DFLS240L-7 datasheet, DFLS240L-7 pinout, DFLS240L-7 application, or DFLS240L-7 equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance junction-to-soldering (5°C/W), peak repetitive reverse voltage (40V), and automotive-grade qualification path via DFLS240LQ.
Technical Context
This Schottky diode uses planar guard ring die construction to suppress edge breakdown and improve transient robustness. Its low 0.45V typical forward voltage at 2.0A directly reduces conduction loss in high-frequency switching supplies.
Thermal performance is defined by two RθJA values: 60°C/W on a 50.8mm × 50.8mm GETEK board and 180°C/W on FR-4 - reflecting layout-dependent thermal management requirements. Junction temperature range spans –55°C to +125°C with 5°C/W RθJS to cathode tab.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before avalanche; sets upper limit for DC blocking in buck converter outputs. |
| IF(AV) | 2.0 A - Average forward current rating under specified thermal conditions; defines continuous load-handling capacity. |
| VF @ 2.0A | 0.45 V - Typical forward voltage drop; determines conduction loss (0.9W at 2A) and thermal rise in compact layouts. |
| IFSM | 50 A - Non-repetitive surge current (8.3ms half-sine); supports inrush and fault-current tolerance in power rails. |
| RθJS | 5 °C/W - Junction-to-soldering thermal resistance; enables accurate thermal modeling from die to PCB copper pad. |
| CT @ 10V | 90 pF - Total junction capacitance at 10V reverse bias; impacts high-frequency switching noise and EMI filtering design. |
Pinout & Package
Package: PowerDI123 - surface-mount, 3-pin (anode/cathode/tab), molded plastic with matte tin–annealed copper leadframe, UL 94V-0 rated, 0.01g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side of rectification path; requires adequate copper area for thermal dissipation. |
| Cathode | Forward current exit point | Marked with band; ties to output/load side; serves as primary thermal interface to PCB via large copper pad. |
| Cathode Tab | Thermal & electrical common node | Exposed metal tab under package bottom; electrically identical to cathode and critical for heat transfer to PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge leakage and improves voltage standoff consistency across temperature and process variation. |
| Low VF (0.45V @ 2A) | Reduces power loss by ~35% vs. standard silicon diodes in 5V/3.3V output stages, improving efficiency above 90%. |
| High surge capability (50A IFSM) | Withstands capacitor charging surges and short-circuit transients without degradation in USB PD and PoE injectors. |
| PowerDI123 package | Enables 30% smaller footprint than SMA while maintaining 1.67W power dissipation on optimized boards. |
Applications
| USB-C Power Delivery Adapter | Industrial 24V DC/DC Converter |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in 20–65W AC/DC adapters. IC Role / Device Role: Low-loss output rectifier replacing MOSFET+driver in cost-sensitive designs. Use Value: Eliminates gate drive complexity while maintaining <0.5V forward drop at full load, reducing BOM count and layout area. | Use Scenario: Output rectification in isolated flyback or forward converters powering PLC I/O modules. IC Role / Device Role: Primary output diode handling 2A continuous load with 40V isolation margin. Use Value: Guarantees reliable operation at +85°C ambient with derated current per Figure 4, avoiding thermal runaway. |
| Automotive Body Control Module | Smart Home Gateway Power Supply |
Use Scenario: Reverse polarity protection and 12V rail clamping in BCM sub-power domains. IC Role / Device Role: Low-VF clamp diode in always-on supply paths with transient immunity. Use Value: Guard ring structure withstands load dump spikes up to ISO 7637-2 Pulse 5a without parameter shift. | Use Scenario: Standby power rectification in multi-rail AC/DC supplies for Wi-Fi/Zigbee gateways. IC Role / Device Role: High-efficiency 5V/3.3V auxiliary rail rectifier operating continuously at light load. Use Value: 0.1µA leakage at 20V enables <10mW no-load loss, meeting Energy Star Level VI standby requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS24 (Digi-Key SS24FSCT-ND) | Same 40V VRRM and 2A IF(AV), but VF = 0.5V @ 2A; RθJA = 100°C/W on FR-4 (vs. 180°C/W for DFLS240L-7). | Larger SMA package increases board area; lacks guard ring; not qualified to AEC-Q standards. | Select when legacy footprint compatibility is required and automotive qualification is unnecessary. |
| SB240-E3/54 (Vishay) | 40V VRRM, 2A IF(AV), VF = 0.5V @ 2A; TO-220AC package; RθJA = 50°C/W (heatsink dependent). | Through-hole mounting; higher thermal mass but incompatible with SMT-only lines; no green/halogen-free compliance. | Choose only where forced-air cooling or mechanical ruggedness outweighs SMT assembly efficiency. |
Compared with SS24 and SB240-E3/54, DFLS240L-7 delivers lower forward voltage, superior thermal resistance to solder joint, and automotive-qualified variant path (DFLS240LQ), making it optimal for space-constrained, high-reliability SMT power supplies.
Availability
DFLS240L-7 is available at Aetrix Electronics and suitable for USB-C power adapters, industrial DC/DC converters, automotive body control modules, and smart home gateway power supplies requiring stable component supply and RoHS-compliant sourcing.
Supply support for DFLS240L-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The DFLS240L belongs to Diodes' Power Discrete product line, engineered for high-efficiency, low-profile power conversion in consumer, industrial, and automotive applications where thermal performance and reliability are critical.
FAQ
What is the maximum junction temperature for DFLS240L-7?
The DFLS240L-7 has an operating junction temperature range of –55°C to +125°C. This rating is validated per JEDEC standards and applies under all specified electrical conditions, including at full 2.0A average current with appropriate PCB thermal relief. Exceeding +125°C risks parametric shift and long-term reliability degradation.
Is DFLS240L-7 suitable for automotive applications?
DFLS240L-7 itself is not AEC-Q200 qualified, but Diodes offers the automotive-grade DFLS240LQ variant - identical electrically and thermally, manufactured in IATF 16949-certified facilities and qualified to AEC-Q200. Customers requiring automotive use must specify the Q-suffix part and complete PPAP documentation.
How does the PowerDI123 package compare thermally to SMA?
PowerDI123 provides 30% smaller footprint than SMA while delivering lower RθJS (5°C/W vs. ~15°C/W for SMA) due to its exposed cathode tab directly bonded to PCB copper. On FR-4, its RθJA is 180°C/W - higher than SMA's ~120°C/W - but this reflects conservative test conditions; real-world layout optimization recovers thermal advantage.
What is the significance of the guard ring die construction?
The guard ring structure surrounds the active junction to prevent premature edge breakdown under high electric field stress. It improves transient voltage immunity, stabilizes reverse leakage across temperature, and enhances long-term reliability in noisy environments like automotive and industrial power rails - confirmed by Diodes' JEDEC high-reliability qualification.
DFLS240L-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:
- 500 mV @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 40 V
- Capacitance @ Vr, F:
- 90pF @ 10V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
- Operating Temperature - Junction:
- -55°C ~ 125°C
DFLS240L-7 FAQ
1.How can I place an order for DFLS240L-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLS240L-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 DFLS240L-7 reliable?
The price and inventory of DFLS240L-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLS240L-7 is usually 5 days.
3.What payment methods are accepted for DFLS240L-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLS240L-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLS240L-7?
DFLS240L-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLS240L-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 DFLS240L-7?
For technical support, including DFLS240L-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLS240L-7 requirements.
6.How does Aetrix verify that DFLS240L-7 is sourced from the original manufacturer or authorized distributors?
All DFLS240L-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 DFLS240L-7 meets industry standards.
7.What is the process for return or replacement of DFLS240L-7?
All DFLS240L-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLS240L-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 DFLS240L-7 part is unused and in its original packaging.
Return procedure for DFLS240L-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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