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Taiwan Semiconductor Corporation B0540WF RHG
- Part No.:
- B0540WF RHG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
B0540WF RHG.pdf
- Description:
- DIODE SCHOTTKY 40V 500MA SOD123F
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
B0540WF RHG from Taiwan Semiconductor is a low-forward-voltage SMD Schottky barrier diode in SOD-123F package, rated for 40 V repetitive peak reverse voltage, 500 mA mean forward current at TL = 100°C, and 20 A non-repetitive peak forward surge current; used in DC-DC converter output rectification and portable power management.
For engineers reviewing the B0540WF RHG datasheet, B0540WF RHG pinout, B0540WF RHG application, or B0540WF RHG equivalent, key selection criteria include VF @ 1.0 A (0.510 V), IR @ 40 V (10 µA), thermal resistance RθJL (118 °C/W), and halogen-free green compound packaging confirmed by suffix "G".
Technical Context
This Schottky diode operates with metal–semiconductor junction architecture to minimize forward conduction loss and eliminate minority-carrier storage delay. Its low VF enables high-efficiency rectification in space-constrained, thermally sensitive applications such as USB-powered devices and PMIC output stages.
Rated for -65°C to +150°C junction temperature range and moisture sensitivity level 1, the B0540WF RHG supports lead-free reflow soldering up to 260°C/10s and maintains stable leakage performance up to 100°C ambient - critical for automotive body electronics and industrial sensor modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - maximum repetitive reverse blocking voltage before breakdown; defines usable input/output voltage margin in buck converter freewheel paths |
| IO (TL=100°C) | 500 mA - continuous forward current limit when lead temperature held at 100°C; sets practical DC load capability without heatsinking |
| VF @ 1.0 A | 0.510 V - forward voltage drop at 1 A DC; directly determines conduction loss (0.51 W per diode) in high-current paths |
| IR @ 40 V | 10 µA - reverse leakage at full rated voltage; ensures minimal standby power loss in battery-backed circuits |
| RθJL | 118 °C/W - junction-to-lead thermal resistance; enables accurate thermal design using PCB copper as primary heat path |
| Package | SOD-123F - flat-lead, halogen-free plastic case (8.85 ± 0.5 mg); compatible with standard 0805 footprint and automated placement |
Pinout & Package
Two-terminal device in SOD-123F package: anode and cathode marked by cathode band on case body; matte tin-plated leads compliant with MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node (e.g., switch node in buck topology); polarity must match layout marking "SQ" |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; cathode band orientation confirms correct placement during assembly |
Key Features
| Feature | Design Value |
|---|---|
| Low VF Schottky architecture | 0.510 V @ 1.0 A reduces conduction loss by ~35% vs. comparable PN diodes, improving efficiency in 3.3 V/5 V DC-DC outputs |
| Halogen-free green compound (suffix G) | Meets IEC 61249-2-21 and JEDEC J-STD-020; eliminates brominated flame retardants without compromising moisture resistance |
| MSL Level 1 rating | No dry-pack or floor-life restrictions; supports unlimited exposure to ambient humidity prior to reflow |
| SOD-123F mechanical outline | 1.6 mm × 3.6 mm × 0.91 mm footprint fits dense layouts; 0.048 mm typical die thickness aids thermal transfer to PCB |
Applications
| USB Power Delivery Rectification | PMIC Output Stage Protection |
|---|---|
Use Scenario: Reverse-polarity and overvoltage protection in USB-C power input circuits handling up to 20 V. IC Role / Device Role / Timing Role: Low-loss series rectifier placed between connector and buck controller input. Use Value: 0.510 V VF minimizes voltage drop across protection path, preserving >97% of available input headroom at 1 A. | Use Scenario: Output freewheeling diode in compact 1.2 V/3 A step-down regulator for FPGA core supply. IC Role / Device Role / Timing Role: Synchronous rectifier replacement where gate drive complexity is prohibitive. Use Value: 118 °C/W RθJL allows direct thermal coupling to 1 oz copper pour, limiting ΔT to <60°C at full load. |
| Automotive Body Control Module | IoT Sensor Node Power Path |
Use Scenario: Load-dump protected 12 V auxiliary rail in door module with CAN/LIN interface. IC Role / Device Role / Timing Role: Clamp and rectify transient-suppressed supply path feeding microcontroller and drivers. Use Value: -65°C to +150°C TJ range and 20 A IFSM withstand capability meet ISO 7637-2 Pulse 5a requirements. | Use Scenario: Battery backup switching in BLE-enabled environmental sensor with coin-cell primary source. IC Role / Device Role / Timing Role: OR-ing diode between main Li-ion and backup CR2032 cells. Use Value: 10 µA IR @ 40 V limits self-discharge to <0.1 µA per cell, extending shelf life beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Diodes Inc. SBM540-E3/52 | Same 40 V VRRM, 500 mA IO, but VF = 0.55 V @ 1 A and RθJA = 206 °C/W (vs. 340 °C/W for B0540WF RHG) | Higher thermal resistance requires larger copper area; less suitable for ultra-thin PCBs | Prefer B0540WF RHG when board thickness <0.8 mm or ambient exceeds 85°C |
| Vishay SS34HM3/84A | 40 V VRRM, 3 A IO rating, VF = 0.52 V @ 3 A, SMC package (larger than SOD-123F) | Higher current capacity but 3.9 mm × 2.5 mm footprint occupies 2.3× more area | Choose SS34HM3/84A only if system requires >500 mA continuous or needs higher surge margin |
Compared with SBM540-E3/52 and SS34HM3/84A, the B0540WF RHG delivers optimal balance of low VF, MSL-1 handling, and minimal 1.6 mm × 3.6 mm footprint - making it preferred for space- and thermal-constrained USB, PMIC, and IoT power rails where 500 mA is sufficient.
Availability
B0540WF RHG is available at Aetrix Electronics and suitable for USB power delivery systems, PMIC output stages, automotive body control modules, and IoT sensor node power paths requiring stable component supply, halogen-free compliance, and MSL Level 1 handling.
Supply support for B0540WF RHG 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection, and signal conditioning components.
The B0540WF RHG belongs to TSC's Small Signal Product line, engineered specifically for high-efficiency, low-profile DC-DC rectification in portable, automotive, and industrial power applications where VF, thermal resistance, and green packaging are critical.
FAQ
What is the maximum junction temperature rating for the B0540WF RHG?
The B0540WF RHG has a specified junction and storage temperature range of -65°C to +150°C. This rating is validated per the manufacturer's DS_S1412005 datasheet and supports operation in under-hood automotive environments and sealed industrial enclosures without derating up to 125°C ambient when properly mounted on adequate copper area.
Does the "G" suffix in B0540WF RHG indicate RoHS and halogen-free compliance?
Yes - the "G" suffix explicitly denotes halogen-free green compound packaging per IEC 61249-2-21, and the device meets RoHS Directive 2011/65/EU. The matte tin-plated leads are lead-free and solderable per MIL-STD-202 Method 208, and the entire B0540WF RHG construction contains no brominated flame retardants or chlorine-based additives.
What is the forward voltage of the B0540WF RHG at 0.5 A and 100°C ambient?
The B0540WF RHG exhibits a forward voltage of 0.620 V at IF = 0.5 A and Ta = 100°C, as confirmed in the "Forward Voltage" table of DS_S1412005. This elevated VF reflects increased junction temperature under high ambient conditions and must be accounted for in thermal loss calculations for sustained 500 mA loads.
Is the B0540WF RHG pin-compatible with other parts in the B05xxxF family?
Yes - all members of the B05xxxF family (including B0520LWF, B0530WF, and B0540WF) share identical SOD-123F package dimensions, pinout, and marking orientation. The only differences are VRRM rating and corresponding VF/IR values; thus, B0540WF RHG can be substituted into designs originally using B0530WF or B0520LWF if 40 V blocking is required.
What is the reverse leakage current of the B0540WF RHG at 40 V and 100°C?
The B0540WF RHG specifies a reverse leakage current of 10 µA at VR = 40 V and Ta = 100°C, per the "Reverse Leakage Current" section of DS_S1412005. This value is measured with electrodes held at ambient temperature and reflects worst-case leakage in thermally stressed battery backup or always-on sensor applications.
B0540WF RHG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 510 mV @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 20 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- -65°C ~ 150°C
B0540WF RHG FAQ
1.How can I place an order for B0540WF RHG through Aetrix?
Please submit a Request for Quotation (RFQ) for B0540WF RHG 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 B0540WF RHG reliable?
The price and inventory of B0540WF RHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B0540WF RHG is usually 5 days.
3.What payment methods are accepted for B0540WF RHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B0540WF RHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B0540WF RHG?
B0540WF RHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B0540WF RHG 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 B0540WF RHG?
For technical support, including B0540WF RHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B0540WF RHG requirements.
6.How does Aetrix verify that B0540WF RHG is sourced from the original manufacturer or authorized distributors?
All B0540WF RHG 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 B0540WF RHG meets industry standards.
7.What is the process for return or replacement of B0540WF RHG?
All B0540WF RHG units undergo pre-shipment inspection (PSI). If there is an issue with B0540WF RHG, 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 B0540WF RHG part is unused and in its original packaging.
Return procedure for B0540WF RHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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