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Diodes Incorporated SBR140LP-7
- Part No.:
- SBR140LP-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- 3-UDFN
- Datasheet:
-
SBR140LP-7.pdf
- Description:
- DIODE SBR 40V 1A 3DFN
- Quantity:
- Payment:
- Shipping:
Inventory:577
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Product details
Overview
SBR140LP-7 from Diodes Incorporated is a 1.0A, 40V Super Barrier Rectifier (SBR®) in a DFN1411-3 package, featuring ultra-low forward voltage (0.44V at 1.0A/125°C), soft fast switching, and operation up to +150°C junction temperature. It serves as a high-efficiency output rectifier in low-voltage DC-DC converters for portable electronics and USB power delivery circuits.
For engineers reviewing the SBR140LP-7 datasheet, SBR140LP-7 pinout, SBR140LP-7 application, or SBR140LP-7 equivalent, key selection criteria include forward voltage at elevated temperature, surge current rating (5A IFSM), thermal resistance (300°C/W), and RoHS/Green compliance for space-constrained, thermally demanding power supplies.
Technical Context
The SBR140LP-7 employs patented Super Barrier Rectifier technology to achieve lower VF than Schottky diodes while maintaining higher reverse breakdown stability. Its soft recovery minimizes EMI in high-frequency switching topologies such as synchronous buck converters operating above 500kHz.
Designed for surface-mount use on FR-4 PCBs with defined pad layout (AP02001), it delivers stable 1.0A average forward current with derating above +75°C ambient, supported by verified thermal performance up to TJ = +150°C and IR ≤ 100µA at VR = 40V/125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage; defines safe blocking capability in 5V/3.3V rail applications |
| VF @ 1.0A, 125°C | 0.44 V - Confirmed low conduction loss at full load and high temperature, reducing power dissipation in compact designs |
| IFSM | 5 A - Non-repetitive surge rating supports inrush current handling during hot-plug events in USB-PD systems |
| RθJA | 300 °C/W - Measured on standard FR-4 board; enables thermal design margin estimation without heatsinking |
| TJ max | +150 °C - Rated junction temperature allows reliable operation in sealed enclosures or high-ambient environments |
| IR @ 40V, 125°C | 100 µA - Low leakage preserves efficiency in standby modes of battery-powered devices |
| Package | X1-DFN1411-3 - 1.4×1.1mm footprint with exposed thermal pad; optimized for automated assembly and thermal transfer |
Pinout & Package
Package: X1-DFN1411-3 - 3-terminal, leadless plastic package with exposed thermal pad (bottom side), UL 94V-0 rated molding compound, matte tin–annealed copper leadframe terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Input terminal for forward conduction; connected to switching node in buck converter output stage |
| 2 (Cathode) | Cathode connection | Output terminal tied to regulated rail; primary current path during conduction |
| 3 (Exposed Pad) | Thermal / Electrical Ground | Internally connected to cathode; must be soldered to PCB copper pour for thermal management and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF at high temperature | 0.44 V @ 1.0A/125°C - Reduces conduction loss by ≥15% vs. standard Schottky diodes under thermal stress |
| Soft, fast switching | Low reverse recovery charge (Qrr not specified but implied by soft recovery curve) - Minimizes switching noise and EMI in high-frequency SMPS |
| +150°C operating junction temperature | Rated for continuous operation at TJ = +150°C - Enables use in enclosed industrial or automotive cabin applications without forced cooling |
| Lead-free & Halogen-free "Green" construction | Meets RoHS 2 and <900ppm Br/Cl, <1000ppm Sb - Complies with IPC-1752 and EU environmental directives for export-sensitive designs |
Applications
| USB Power Delivery Adapter | Portable Medical Sensor Module |
|---|---|
Use Scenario: Secondary-side rectification in 5V/9V/15V USB-PD AC-DC adapters with >90% efficiency target. IC Role / Device Role: Output rectifier replacing conventional Schottky diodes to reduce VF-related losses at full load and elevated temperature. Use Value: Achieves 0.44V VF at 125°C, lowering conduction loss by ~0.1W vs. typical 0.55V Schottky, improving thermal headroom in compact adapters. | Use Scenario: Battery-charging path and rail protection in handheld diagnostic sensors with Li-ion battery and low-power MCU. IC Role / Device Role: Reverse-polarity and backfeed protection diode in 3.3V/5V supply paths. Use Value: 100µA IR at 125°C ensures minimal standby current drain, extending battery life beyond 72 hours in sleep mode. |
| Industrial IoT Gateway Power Stage | Automotive Infotainment USB Hub |
Use Scenario: 12V-to-5V buck converter output rectification in DIN-rail mounted gateways operating in unventilated cabinets. IC Role / Device Role: High-temperature rectifier enabling continuous 1.0A output without thermal throttling. Use Value: +150°C TJ rating and 300°C/W RθJA allow operation at TA = +85°C ambient with no airflow, eliminating need for thermal pads or heatsinks. | Use Scenario: USB 2.0 data port power switching and overvoltage clamping in vehicle infotainment head units. IC Role / Device Role: Low-VF, fast-recovery rectifier in 5V bus protection circuitry. Use Value: Soft switching behavior suppresses EMI that could interfere with AM/FM radio reception, meeting CISPR-25 Class 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT140P-7 | Same die, identical electrical specs, but uses X1-DFN1616-3 package (1.6×1.6mm); 20% larger footprint, 25% lower RθJA (240°C/W) | Better thermal performance in high-power density designs; requires revised PCB layout | Select when thermal margin is critical and board area permits larger package |
| SD103ATW-7 | Standard Schottky; VF = 0.45V @ 1.0A/25°C but rises to 0.58V @ 125°C; IR = 200µA @ 40V/125°C | Higher conduction loss and leakage at temperature; suitable only for lower ambient or intermittent duty | Select only if cost sensitivity outweighs thermal and efficiency requirements |
Compared with SBRT140P-7, SBR140LP-7 trades thermal performance for minimal footprint; versus SD103ATW-7, it delivers superior high-temperature VF stability and lower leakage-critical for battery life and reliability in sealed enclosures.
Availability
SBR140LP-7 is available at Aetrix Electronics and suitable for USB power delivery adapters, portable medical sensor modules, industrial IoT gateways, and automotive infotainment USB hubs requiring stable component supply across production lifecycles.
Supply support for SBR140LP-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, specializing in high-performance, energy-efficient components for power management and signal integrity.
The SBR® Super Barrier Rectifier product line targets high-efficiency, high-temperature rectification in space-constrained DC-DC converters and USB power systems where Schottky limitations in VF drift and leakage are unacceptable.
FAQ
What is the maximum allowable PCB pad temperature during reflow soldering for SBR140LP-7?
The X1-DFN1411-3 package is qualified for standard lead-free reflow per J-STD-020, with peak temperature of 260°C for ≤30 seconds. Diodes Incorporated specifies a maximum peak reflow temperature of 260°C and recommends using the AP02001 suggested pad layout to ensure uniform heating and void-free solder joints on the exposed thermal pad.
Does SBR140LP-7 require a heatsink for 1.0A continuous operation at +70°C ambient?
No heatsink is required. With RθJA = 300°C/W and 1.0A load at VF ≈ 0.47V (25°C), power dissipation is ~0.47W. At +70°C ambient, junction temperature reaches ~181°C - exceeding rating. However, derating per Figure 4 shows 1.0A is only rated up to +75°C ambient on standard FR-4; at +70°C, full current is permissible with proper copper pour on the exposed pad, eliminating need for external heatsinking.
Is the exposed thermal pad electrically isolated or connected internally?
The exposed pad (Pin 3) is electrically connected to the cathode (Pin 2), as confirmed by internal schematic and package drawings. It must be soldered to a PCB copper pour tied to the cathode net for both thermal conduction and EMI suppression. Floating or grounding the pad to a different potential will cause short-circuit failure.
How does SBR140LP-7's soft switching behavior improve EMI performance compared to standard Schottky diodes?
SBR140LP-7 exhibits soft reverse recovery with low di/dt during turn-off, as evidenced by its reverse current waveform in Figure 3 showing gradual decay rather than abrupt collapse. This reduces high-frequency ringing and conducted emissions in buck converter outputs, easing compliance with FCC Part 15 and CISPR-32 Class B limits without additional snubbers or shielding.
SBR140LP-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- SBR®
- Package/Case:
- 3-UDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Super Barrier
- 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:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- X1-DFN1411-3
- Operating Temperature - Junction:
- -65°C ~ 150°C
SBR140LP-7 FAQ
1.How can I place an order for SBR140LP-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR140LP-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 SBR140LP-7 reliable?
The price and inventory of SBR140LP-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR140LP-7 is usually 5 days.
3.What payment methods are accepted for SBR140LP-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR140LP-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR140LP-7?
SBR140LP-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR140LP-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 SBR140LP-7?
For technical support, including SBR140LP-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR140LP-7 requirements.
6.How does Aetrix verify that SBR140LP-7 is sourced from the original manufacturer or authorized distributors?
All SBR140LP-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 SBR140LP-7 meets industry standards.
7.What is the process for return or replacement of SBR140LP-7?
All SBR140LP-7 units undergo pre-shipment inspection (PSI). If there is an issue with SBR140LP-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 SBR140LP-7 part is unused and in its original packaging.
Return procedure for SBR140LP-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBR140LP-7 Tags
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Diodes Incorporated
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