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Diodes Incorporated DFLS140L-7
- Part No.:
- DFLS140L-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLS140L-7.pdf
- Description:
- DIODE SCHOTTKY 40V 1A PWRDI123
- Quantity:
- Payment:
- Shipping:
Inventory:36,807
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Product details
Overview
DFLS140L-7 from Diodes Incorporated is a 40 V, 1.0 A surface-mount Schottky barrier rectifier in PowerDI®123 package, featuring 0.55 V max forward voltage at 1 A and 0.1 mA max reverse leakage at 40 V and +25°C. It delivers high surge capability (50 A IFSM), low power loss, and is qualified to AEC-Q standards for automotive-grade reliability.
For engineers reviewing the DFLS140L-7 datasheet, DFLS140L-7 pinout, DFLS140L-7 application, or DFLS140L-7 equivalent, key selection criteria include forward voltage drop at 1 A, reverse leakage at elevated temperature, thermal resistance (120 °C/W on 1-inch² copper pad), and AEC-Q qualification status for under-hood automotive use.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and patented interlocking clip design to sustain 50 A non-repetitive surge current. Its low VF (0.36 V typ. @ 0.1 A, +25°C) and low IR (0.05 mA @ 20 V, +25°C) support high-efficiency DC/DC and polarity protection circuits.
Thermal performance is defined by two RθJA values: 180 °C/W on standard FR-4 (2 oz Cu), and 120 °C/W on optimized 1-inch² copper pad - enabling accurate junction temperature estimation across PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (V) | 40 V peak repetitive reverse voltage - sets maximum blocking capability in 12 V/24 V automotive systems. |
| IF(AV) (A) | 1.0 A average forward current - supports continuous operation in low-power load-switching paths. |
| VF MAX (V) @ 1 A | 0.55 V at +25°C - enables <0.55 W conduction loss per diode at full rated current. |
| IR MAX (mA) @ 40 V | 0.1 mA at +25°C - ensures minimal standby power drain in always-on vehicle modules. |
| IFSM (A) | 50 A (8.3 ms half-sine) - withstands inrush and load-dump transients without failure. |
| RθJA (°C/W) | 120 °C/W on 1-inch² 2 oz Cu pad - allows ~65°C rise at 1 A, supporting operation up to +125°C TJ. |
| Operating TJ | –55°C to +125°C - meets extended temperature requirements for engine control units and body electronics. |
Pinout & Package
Package: PowerDI®123 - surface-mount, single-ended, cathode-tab package with matte tin-plated leads; 0.01 g weight; UL 94V-0 molded plastic body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side of polarity protection or freewheeling path. |
| Cathode (Tab) | Forward current exit / thermal path | Electrically and thermally connected to PCB copper pad; serves as primary heat sink interface. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and transient robustness without external TVS, reducing BOM count in automotive ECUs. |
| Patented interlocking clip design | Enables 50 A surge rating in compact PowerDI123 footprint - critical for load-dump survival. |
| AEC-Q qualified | Meets JEDEC-based automotive reliability standards - eliminates need for additional qualification testing. |
| Lead-free, halogen/antimony-free | Complies with RoHS 3 and "Green" definitions (<900 ppm Br/Cl, <1000 ppm Sb) - supports global automotive compliance programs. |
Applications
| Polarity Protection | Recirculating Diode |
|---|---|
Use Scenario: Reverse-voltage protection in 12 V battery-fed modules such as door controllers and lighting drivers. IC Role / Device Role / Timing Role: Unidirectional current gate placed between battery and system input rail. Use Value: Prevents damage during battery misconnection with <0.55 V dropout, minimizing voltage loss in low-voltage systems. | Use Scenario: Freewheeling path for inductive loads like fuel injectors and solenoid valves in engine management systems. IC Role / Device Role / Timing Role: Clamps back-EMF spike during switch-off to protect driving MOSFETs. Use Value: 50 A surge rating absorbs energy from 12 V inductive coils without degradation over lifetime. |
| Automotive Switching Supply | Low-Power DC/DC Output Rectification |
Use Scenario: Secondary-side rectification in isolated flyback or forward converters powering infotainment subsystems. IC Role / Device Role / Timing Role: High-frequency output rectifier operating at 100–500 kHz switching frequencies. Use Value: Low VF and 90 pF capacitance minimize conduction loss and switching noise, improving efficiency above 85%. | Use Scenario: Output rectification in non-isolated buck-derived supplies for ADAS camera modules and radar sensors. IC Role / Device Role / Timing Role: Synchronous rectifier replacement where simplicity and cost outweigh marginal efficiency gain. Use Value: 0.36 V typical VF at 0.1 A enables >90% efficiency at light loads - critical for always-on sensor nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB140-E3/54 | Same 40 V / 1 A rating but TO-277 package; higher RθJA (150 °C/W); no AEC-Q qualification. | Not suitable for automotive under-hood use; limited to industrial or consumer PCBs with ample airflow. | Select only if AEC-Q is not required and TO-277 mounting is preferred. |
| SS14 | 40 V / 1 A; SMA package; VF = 0.5 V max @ 1 A; RθJA = 170 °C/W; no AEC-Q or surge rating specified. | Lacks documented surge capability and automotive qualification - requires additional validation for automotive deployment. | Acceptable for cost-sensitive non-automotive designs where space and thermal margin allow. |
Compared with SB140-E3/54 and SS14, DFLS140L-7 uniquely combines AEC-Q qualification, 50 A surge rating, and PowerDI123 thermal performance - making it the only drop-in solution for production automotive modules requiring zero requalification.
Availability
DFLS140L-7 is available at Aetrix Electronics and suitable for automotive body control modules, engine management units, and ADAS power supplies requiring stable component supply, long-term lifecycle assurance, and AEC-Q-compliant sourcing.
Supply support for DFLS140L-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 DFLS series targets automotive-grade Schottky rectifiers, designed specifically for high-reliability, high-surge, low-VF applications in harsh-temperature environments - including engine compartments and battery management systems.
FAQ
What is the maximum junction temperature and how is it validated?
The DFLS140L-7 has a rated operating junction temperature range of –55°C to +125°C, verified per AEC-Q101 stress test conditions including HTGB, HTRB, and TCT. Thermal resistance data (RθJA = 120 °C/W on 1-inch² copper) enables direct calculation of TJ under real-world power dissipation and ambient conditions.
Is DFLS140L-7 pin-compatible with DFLS140LQ?
Yes - DFLS140L-7 and DFLS140LQ share identical PowerDI®123 package dimensions, pinout, and electrical specifications. The Q suffix denotes AEC-Q200 qualification and automotive-specific traceability; both parts use the same die and assembly process.
Does this part require derating at elevated ambient temperatures?
Yes - Figure 4 in the datasheet provides forward current derating: at +85°C ambient, IF(AV) must be reduced to ~0.75 A on a 1-inch² copper pad. Derating follows a linear curve down to zero at +125°C ambient, ensuring safe operation within the specified TJ limit.
Can DFLS140L-7 be used in synchronous rectification topologies?
No - DFLS140L-7 is a passive Schottky rectifier, not a synchronous MOSFET driver or controlled switch. It functions as a unidirectional freewheeling or polarity protection device. For synchronous rectification, discrete MOSFETs with gate drive control are required.
DFLS140L-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):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 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
DFLS140L-7 FAQ
1.How can I place an order for DFLS140L-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLS140L-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 DFLS140L-7 reliable?
The price and inventory of DFLS140L-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLS140L-7 is usually 5 days.
3.What payment methods are accepted for DFLS140L-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLS140L-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLS140L-7?
DFLS140L-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLS140L-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 DFLS140L-7?
For technical support, including DFLS140L-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLS140L-7 requirements.
6.How does Aetrix verify that DFLS140L-7 is sourced from the original manufacturer or authorized distributors?
All DFLS140L-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 DFLS140L-7 meets industry standards.
7.What is the process for return or replacement of DFLS140L-7?
All DFLS140L-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLS140L-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 DFLS140L-7 part is unused and in its original packaging.
Return procedure for DFLS140L-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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