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Diodes Incorporated SBR1U40LP-7
- Part No.:
- SBR1U40LP-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- 3-UDFN
- Datasheet:
-
SBR1U40LP-7.pdf
- Description:
- DIODE SBR 40V 1A DFN1411-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,622
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Product details
Overview
SBR1U40LP-7 from Diodes Incorporated is a 1.0A, 40V ultra-low forward voltage super barrier rectifier in a X1-DFN1411-3 package, featuring 0.39V typical VF at 0.5A/25°C and 150°C junction temperature rating, optimized for high-efficiency DC/DC conversion in space-constrained power supplies.
For engineers reviewing the SBR1U40LP-7 datasheet, SBR1U40LP-7 pinout, SBR1U40LP-7 application, or SBR1U40LP-7 equivalent, key selection criteria include forward voltage drop at elevated temperature, surge current capability (5A @ 8.3ms), thermal resistance (190°C/W), and RoHS/halogen-free compliance for automotive and industrial power modules.
Technical Context
This super barrier rectifier employs patented Schottky-like barrier technology with enhanced high-temperature stability-unlike conventional Schottkys, it maintains low VF drift up to 150°C junction temperature and exhibits soft reverse recovery to minimize EMI in switching converters.
It operates as a unidirectional power rectifier in low-voltage, high-current paths such as synchronous buck converter freewheeling legs and USB-C PD power path protection, where low conduction loss and thermal robustness are critical under sustained ambient temperatures up to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Reverse Voltage | 40 V - blocks up to 40V DC or peak AC in input rectification or OR-ing applications |
| Forward Current (Avg) | 1.0 A - supports continuous output current in compact 5V/3.3V point-of-load converters |
| Forward Voltage (Typ) | 0.39 V @ 0.5A, 25°C - reduces conduction loss by ~30% vs. standard Schottky diodes at same current |
| Junction Temp Range | –65°C to +150°C - enables operation in under-hood automotive or sealed industrial enclosures |
| Thermal Resistance | 190 °C/W - requires minimal PCB copper area (1"×1", 2oz double-sided) for thermal management |
| Surge Current | 5 A @ 8.3ms - withstands inrush and transient overloads in hot-swap and load-switch circuits |
| Leakage Current | 50 µA @ 40V, 25°C - ensures low standby power in always-on systems |
Pinout & Package
Package: X1-DFN1411-3 - 1.4mm × 1.1mm × 0.5mm leadless plastic DFN with exposed thermal pad, rated for moisture sensitivity level 1 and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Input current terminal | Connects to switching node or input rail; carries full forward current during conduction |
| 2 (Cathode) | Output current terminal | Connects to output capacitor or ground return; defines polarity and voltage reference |
| 3 (Exposed Pad) | Thermal & electrical ground | Must be soldered to PCB thermal pad for effective heat dissipation and low-inductance return path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF at high temp | 0.43V typ @ 1.0A, 125°C - maintains efficiency in thermally stressed environments |
| Soft switching behavior | No hard reverse recovery snap-back - reduces EMI generation in high-frequency SMPS |
| Lead-free & green construction | Meets RoHS 2 and halogen-free standards (<900ppm Br/Cl, <1000ppm Sb) for eco-compliant designs |
| High surge tolerance | 5A non-repetitive surge (8.3ms) - survives repeated cold-start events without degradation |
Applications
| USB-C Power Delivery | Automotive Infotainment |
|---|---|
Use Scenario: Bidirectional power path control in USB-C DRP ports with reverse polarity protection. IC Role / Device Role / Timing Role: Freewheeling rectifier in buck-boost controller output stage, handling 3A peak currents. Use Value: 0.39V VF minimizes voltage drop across 5V/9V rails, preserving regulation margin and reducing thermal stress on PCB traces. | Use Scenario: Input rectification for 12V battery-supplied display controllers in dashboards. IC Role / Device Role / Timing Role: Primary DC input clamp and reverse-polarity protection diode upstream of PMIC. Use Value: 150°C junction rating ensures reliability during extended operation in sealed enclosures near engine heat sources. |
| Industrial IoT Sensor Node | Compact AC-DC Adapter |
Use Scenario: Energy harvesting rectification for solar/battery hybrid power management in wireless sensors. IC Role / Device Role / Timing Role: Low-leakage (50µA @ 40V) rectifier capturing micro-power from piezoelectric or thermoelectric sources. Use Value: Sub-0.4V forward drop maximizes harvested energy transfer efficiency at µA–mA current levels. | Use Scenario: Secondary-side synchronous rectification replacement in 5W wall adapters. IC Role / Device Role / Timing Role: Output rectifier in flyback converter, replacing larger Schottky diodes to shrink footprint. Use Value: 1.4mm × 1.1mm DFN package enables >30% board area reduction versus SMA/SOD-123 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT1A40S-13 | Same 40V/1A rating but TO-277 package; higher RθJA (220°C/W); VF = 0.41V @ 1A/25°C | Requires more PCB area; less suitable for ultra-thin consumer devices | Prefer when manual assembly or high-volume wave soldering is used |
| PS1040L-13 | 1.0A/40V Schottky; VF = 0.45V @ 1A/25°C; max TJ = 125°C; no soft recovery | Higher conduction loss and EMI risk in >500kHz converters | Acceptable only in cost-sensitive, low-frequency (<300kHz), non-automotive designs |
Compared with SBRT1A40S-13 and PS1040L-13, the SBR1U40LP-7 delivers superior thermal performance in minimal area, lower VF at elevated temperature, and EMI-friendly soft switching-making it optimal for high-density, high-reliability DC/DC stages where size and efficiency are co-constrained.
Availability
SBR1U40LP-7 is available at Aetrix Electronics and suitable for USB-C power delivery modules, automotive infotainment power supplies, and industrial IoT sensor nodes requiring stable component supply and long-term lifecycle assurance.
Supply support for SBR1U40LP-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 power management, signal integrity, and connectivity solutions.
The SBR® Super Barrier Rectifier product line was developed to replace conventional Schottky diodes in high-efficiency, high-temperature power conversion applications-delivering lower VF, improved thermal stability, and reduced EMI without sacrificing ruggedness.
FAQ
What is the recommended PCB pad layout for SBR1U40LP-7?
The datasheet specifies a 1.4mm × 1.1mm thermal pad with 0.275mm solder mask opening and 0.55mm center-to-center pitch for terminals. Use a 3×3 array of 0.2mm thermal vias under the exposed pad, filled and capped, to achieve ≤45°C/W effective thermal resistance in production boards.
Does SBR1U40LP-7 require a heatsink in 1A continuous operation?
No external heatsink is required. With RθJA = 190°C/W and PD = 400mW max, junction temperature rise is ~76°C above ambient at 1A/25°C. At TA = 85°C, TJ reaches ~161°C-exceeding rating-so derating to 0.65A is advised for sustained 85°C ambient operation per Figure 5.
Can SBR1U40LP-7 be used in reverse-biased protection circuits?
Yes-it is rated for 40V peak repetitive reverse voltage and exhibits only 50µA leakage at 40V/25°C. Its low IR makes it suitable for reverse-polarity protection in 5V–12V systems, though a series fuse or current limiter is recommended to handle IFSM during fault conditions.
How does SBR1U40LP-7 compare to standard Schottky diodes in EMI performance?
SBR1U40LP-7 features soft, fast reverse recovery with no current snap-off, confirmed by its reverse recovery waveform in Figure 3. This eliminates high-frequency ringing seen in standard Schottkys, reducing conducted EMI by 8–12dB in 1–10MHz range-critical for CISPR-32-compliant power supplies.
SBR1U40LP-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:
- 490 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1411-3
- Operating Temperature - Junction:
- -65°C ~ 150°C
SBR1U40LP-7 FAQ
1.How can I place an order for SBR1U40LP-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR1U40LP-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 SBR1U40LP-7 reliable?
The price and inventory of SBR1U40LP-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR1U40LP-7 is usually 5 days.
3.What payment methods are accepted for SBR1U40LP-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR1U40LP-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR1U40LP-7?
SBR1U40LP-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR1U40LP-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 SBR1U40LP-7?
For technical support, including SBR1U40LP-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR1U40LP-7 requirements.
6.How does Aetrix verify that SBR1U40LP-7 is sourced from the original manufacturer or authorized distributors?
All SBR1U40LP-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 SBR1U40LP-7 meets industry standards.
7.What is the process for return or replacement of SBR1U40LP-7?
All SBR1U40LP-7 units undergo pre-shipment inspection (PSI). If there is an issue with SBR1U40LP-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 SBR1U40LP-7 part is unused and in its original packaging.
Return procedure for SBR1U40LP-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBR1U40LP-7 Tags
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