My Inquiry
My Account
Diodes Incorporated DFLS140LQ-7
- Part No.:
- DFLS140LQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- POWERDI®123
- Datasheet:
-
DFLS140LQ-7.pdf
- Description:
- DIODE SCHOTTKY 40V 1A PWRDI123
- Quantity:
- Payment:
- Shipping:
Inventory:7,410
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DFLS140LQ from Diodes Incorporated is a 40 V, 1.0 A surface-mount Schottky barrier rectifier in PowerDI123 package, featuring 0.55 V max forward voltage at 1.0 A and 0.1 mA max reverse leakage at 40 V and +25°C. It delivers high surge current capacity (50 A IFSM), low thermal resistance (10 °C/W RθJS), and is qualified to AEC-Q101 for automotive polarity protection and flyback diode applications.
For engineers reviewing the DFLS140LQ datasheet, DFLS140LQ pinout, DFLS140LQ application, or DFLS140LQ equivalent, this part supports critical automotive power rail protection where low VF, fast switching, and robust transient immunity are required - especially in engine control units, body electronics, and ADAS power supplies.
Technical Context
This Schottky rectifier uses guard ring die construction to suppress voltage transients and prevent edge breakdown under repetitive surge conditions. Its patented interlocking clip design enhances mechanical bond integrity and enables 50 A non-repetitive peak forward surge current handling without bond wire failure.
The device operates across –55°C to +125°C junction temperature with 1.67 W power dissipation on a 50.8 mm × 50.8 mm GETEK board. Its 90 pF total capacitance at 10 V reverse bias supports high-frequency switching stability in DC-DC converter catch diode roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VR (VRRM) | 40 V - Maximum blocking voltage before avalanche; ensures safe operation in 24 V automotive systems with load dump transients. |
| IF(AV) | 1.0 A - Continuous average forward current at TJ = +120°C; suitable for compact 1 A power rail clamping or recirculation paths. |
| VF MAX | 0.55 V @ 1.0 A, +25°C - Low conduction loss reduces heat generation and improves efficiency in high-duty-cycle switching nodes. |
| IR MAX | 0.1 mA @ 40 V, +25°C - Minimal leakage preserves battery standby life in always-on vehicle modules. |
| IFSM | 50 A @ 8.3 ms - Withstands motor commutation spikes and inductive kickback without degradation. |
| RθJS | 10 °C/W - Enables direct thermal coupling to PCB copper pads for passive cooling in space-constrained automotive PCBs. |
| TJ Range | –55°C to +125°C - Meets extended temperature requirements of under-hood and infotainment power stages. |
Pinout & Package
Package: PowerDI123 - Surface-mount, single-diode configuration with cathode band marking; molded green plastic (UL 94V-0), matte tin annealed terminals over copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to positive supply or inductive load side; requires thermal pad layout per Diodes' recommended footprint (X1=2.40 mm, Y=1.50 mm). |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; soldered to ground or return path; carries full load current and must be routed with ≥1.8 mm × 2.5 mm copper area for thermal relief. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche during voltage transients, enabling reliable operation in noisy automotive environments. |
| Interlocking clip design | Increases mechanical bond strength between die and leadframe, sustaining 50 A surge without delamination or wire bond lift. |
| AEC-Q101 qualification | Validated for automotive use with PPAP capability and manufacturing in IATF 16949 certified facilities. |
| Green compound & RoHS3 compliance | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); meets EU Directive 2015/863/EU and automotive sustainability mandates. |
Applications
| Engine Control Unit (ECU) Polarity Protection | Body Control Module (BCM) Load Dump Clamping |
|---|---|
Use Scenario: Prevents reverse-battery connection damage to microcontroller power rails and CAN transceivers. IC Role / Device Role / Timing Role: Unidirectional blocking diode placed in series with main 12 V input. Use Value: 0.55 V VF minimizes voltage drop at 1 A startup current, preserving brown-out margin for 3.3 V LDOs. |
Use Scenario: Absorbs 12 V system voltage spikes up to ±60 V during alternator load dump events. IC Role / Device Role / Timing Role: Parallel clamping diode across power input with TVS or Zener. Use Value: 50 A IFSM rating handles 8.3 ms surge pulses without thermal runaway or parameter shift. |
| ADAS Camera Power Supply Recirculation | Electric Power Steering (EPS) Motor Freewheeling |
Use Scenario: Provides freewheeling path for inductive current when buck converter driving image sensor shuts off. IC Role / Device Role / Timing Role: Catch diode in synchronous or asynchronous DC-DC stage. Use Value: 90 pF CT and low VF reduce switching losses and EMI in 2 MHz+ converters powering CMOS image sensors. |
Use Scenario: Recirculates motor phase current during PWM dead-time in three-phase H-bridge drivers. IC Role / Device Role / Timing Role: High-current freewheeling diode across each MOSFET switch. Use Value: –55°C to +125°C operating range ensures stable conduction during EPS motor thermal cycling under hood. |
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 (125 °C/W), no AEC-Q101 qualification. | Limited to industrial/commercial use; unsuitable for PPAP-controlled automotive production. | Select only if cost sensitivity outweighs automotive compliance and thermal performance needs. |
| SS14H | 40 V / 1 A in SMA package; VF = 0.5 V typ @ 1 A, but IFSM = 30 A and RθJA = 150 °C/W. | Lower surge rating and poorer thermal dissipation restrict use to low-stress consumer power supplies. | Preferable only for non-automotive designs where board space is constrained and surge immunity is secondary. |
Compared with SB140-E3/54 and SS14H, the DFLS140LQ uniquely combines AEC-Q101 qualification, 50 A surge capability, and 10 °C/W junction-to-solder thermal resistance - making it the only choice for thermally demanding, safety-critical automotive power paths requiring zero field failure risk.
Availability
DFLS140LQ is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across long production lifecycles.
Supply support for DFLS140LQ 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 components for automotive, industrial, and computing markets.
The DFLS140LQ belongs to Diodes' SBR® (Schottky Barrier Rectifier) product line, engineered specifically for automotive-grade power conversion where low VF, high surge tolerance, and AEC-Q101 reliability are mandatory.
FAQ
Is DFLS140LQ suitable for synchronous rectification?
No - DFLS140LQ is a passive Schottky rectifier, not a controlled MOSFET-based synchronous rectifier. It lacks gate drive interface or logic-level control. Its role is strictly unidirectional conduction with fixed forward voltage drop, optimized for simplicity and surge resilience in flyback or buck catch positions.
What is the maximum PCB copper area needed for thermal performance?
For rated 1.0 A continuous operation at +120°C junction temperature, Diodes specifies a 25.4 mm × 25.4 mm copper pad (25% anode / 75% cathode) on a 50.8 mm × 50.8 mm GETEK board. Smaller pads reduce power dissipation to 556 mW and require ambient derating per Figure 4.
Does DFLS140LQ have a specified reverse recovery time (trr)?
No - as a Schottky barrier device, DFLS140LQ has no minority-carrier storage and therefore no defined reverse recovery time. Its switching is majority-carrier dominated, resulting in effectively zero trr, which eliminates switching losses and EMI associated with PN-junction recovery.
Can DFLS140LQ replace a standard PN rectifier like 1N4007 in automotive circuits?
Yes, but only where voltage rating (40 V vs. 1000 V) and surge profile match. DFLS140LQ offers lower VF and faster switching than 1N4007, but its 40 V VRRM limits use to 12/24 V systems. It is not a drop-in replacement for high-voltage AC-DC front ends.
DFLS140LQ-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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerDI™ 123
- Operating Temperature - Junction:
- -55°C ~ 125°C
DFLS140LQ-7 FAQ
1.How can I place an order for DFLS140LQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DFLS140LQ-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 DFLS140LQ-7 reliable?
The price and inventory of DFLS140LQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DFLS140LQ-7 is usually 5 days.
3.What payment methods are accepted for DFLS140LQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DFLS140LQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DFLS140LQ-7?
DFLS140LQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DFLS140LQ-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 DFLS140LQ-7?
For technical support, including DFLS140LQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DFLS140LQ-7 requirements.
6.How does Aetrix verify that DFLS140LQ-7 is sourced from the original manufacturer or authorized distributors?
All DFLS140LQ-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 DFLS140LQ-7 meets industry standards.
7.What is the process for return or replacement of DFLS140LQ-7?
All DFLS140LQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DFLS140LQ-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 DFLS140LQ-7 part is unused and in its original packaging.
Return procedure for DFLS140LQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DFLS140LQ-7 Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
