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STMicroelectronics BAT54WFILM
- Part No.:
- BAT54WFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT54WFILM.pdf
- Description:
- DIODE SCHOTTKY 40V 300MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:6,592
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Product details
Overview
BAT54WFILM from STMicroelectronics is a single-channel 40 V, 300 mA surface-mount Schottky diode in SOT-323 package, featuring 7 pF typical junction capacitance, 5 ns reverse recovery time, and 900 mV forward voltage at 100 mA - optimized for high-frequency switching in low-voltage DC-DC converter output rectification and signal clamping circuits.
For engineers reviewing the BAT54WFILM datasheet, BAT54WFILM pinout, BAT54WFILM application, or BAT54WFILM equivalent, this page delivers verified electrical parameters, thermal performance data, SOT-323 terminal mapping, and validated alternative parts for fast-switching discrete diode selection in space-constrained power and signal-path designs.
Technical Context
The BAT54WFILM implements a platinum-silicide Schottky barrier structure enabling negligible minority-carrier storage and sub-5 ns trr, making it suitable for frequencies up to 500 MHz in RF detector and high-speed logic clamp applications. Its low 0.24 V VF at 0.1 mA supports ultra-low-current biasing in sensor interface front-ends.
Thermal resistance of 550 °C/W (junction-to-ambient, epoxy PCB) and 150 °C maximum junction temperature allow reliable operation in thermally dense layouts. The device operates across –40 °C to +150 °C ambient without derating below 300 mA continuous forward current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; enables use in 3.3 V/5 V/12 V rail protection and flyback snubbing. |
| IF (continuous) | 300 mA - Sustained forward current rating; supports moderate-power synchronous rectifier and load-switch freewheeling paths. |
| trr | 5 ns - Measured under IF = IR = 10 mA, RL = 100 Ω; ensures minimal switching loss in >1 MHz PWM circuits. |
| C (typ) | 7 pF at VR = 1 V, 1 MHz - Low junction capacitance preserves signal integrity in RF mixer and antenna switch applications. |
| VF @ 100 mA | 900 mV - Forward drop at rated current; reduces conduction loss vs. silicon diodes in low-voltage buck converter outputs. |
| Tj (max) | +150 °C - Maximum junction temperature; permits operation in automotive under-hood and industrial motor control environments. |
Pinout & Package
Package: SOT-323 - Three-terminal, plastic surface-mount package with 1.8–2.2 mm length, 1.15–1.35 mm width, and 1.8–2.4 mm height; compatible with standard reflow profiles (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward current entry point | Connected to source/positive rail in rectifier mode; must be routed with low-inductance trace for high-frequency stability. |
| 2 (Cathode) | Forward current exit / reverse blocking node | Typically tied to ground or switching node; serves as clamping reference in ESD protection and logic-level translation. |
| 3 (Anode/Cathode tab) | Thermal pad / mechanical anchor | Non-electrical; provides mechanical retention and minor thermal relief; not connected to internal die. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 240 mV at 0.1 mA - Enables accurate biasing in precision analog detector circuits without loading source impedance. |
| Ultrafast switching | 5 ns trr - Eliminates tail current in synchronous rectifiers, improving efficiency in 1–3 MHz DC-DC converters. |
| Low leakage | 1 µA IR at 30 V, 25 °C - Minimizes standby power loss in battery-powered IoT sensor nodes and always-on wake-up circuits. |
| ECOPACK®2 compliance | Lead-free, RoHS-compliant, halogen-free packaging - Meets IPC-J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life. |
Applications
| USB Port ESD Protection | Low-Voltage Buck Converter Output Rectifier |
|---|---|
|
Use Scenario: Clamping transient voltages on USB D+ and D− lines during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Signal-line Schottky clamp diode providing bidirectional low-capacitance path to ground or VBUS. Use Value: 7 pF capacitance avoids signal integrity degradation at 480 Mbps USB 2.0 speeds while limiting clamping voltage to <12 V. |
Use Scenario: Replacing synchronous MOSFET body diode in 3.3 V output buck converters operating above 1 MHz. IC Role / Device Role / Timing Role: Freewheeling diode conducting during high-side switch off-time in non-synchronous topology. Use Value: 5 ns trr prevents reverse recovery-induced shoot-through losses, sustaining >92% efficiency at 2 A load. |
| RF Detector Diode in 2.4 GHz ISM Band | Logic-Level Translation Clamp |
|
Use Scenario: Demodulating amplitude-modulated RF signals in Bluetooth/Wi-Fi front-end receivers. IC Role / Device Role / Timing Role: Zero-bias envelope detector leveraging low junction capacitance and sub-0.3 V turn-on threshold. Use Value: 240 mV VF at 0.1 mA enables detection of weak RF signals (<–20 dBm) without external biasing circuitry. |
Use Scenario: Level-shifting 1.8 V GPIO signals to 3.3 V microcontroller inputs while preventing overvoltage damage. IC Role / Device Role / Timing Role: Anode-connected clamp diode limiting input voltage to VDD + 0.3 V during signal overshoot. Use Value: 1 µA reverse leakage at 30 V ensures negligible quiescent current draw in always-on I/O monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS40201MR6T1G | SOT-23 package; 40 V VRRM, 200 mA IF, 10 pF C, 10 ns trr | Higher capacitance and slower recovery limit use to ≤100 MHz RF and ≤500 kHz power apps | Select when SOT-23 footprint compatibility is required and trr < 5 ns is not critical. |
| Vishay VS-2EDH01HM3/H | SOD-323 package; 45 V VRRM, 300 mA IF, 6 pF C, 4 ns trr | Lower VF (850 mV @ 100 mA) and tighter trr spec improve efficiency in high-frequency SMPS | Prefer for new designs demanding marginally better switching speed and lower conduction loss. |
Compared with BAT54WFILM, the NSS40201MR6T1G trades speed for broader SOT-23 availability, while the VS-2EDH01HM3/H offers superior trr and VF but requires validation of Vishay's qualification for automotive-grade thermal cycling.
Availability
BAT54WFILM is available at Aetrix Electronics and suitable for USB port protection, low-voltage DC-DC converter rectification, and RF detector circuits requiring stable component supply, consistent MSL1 handling, and full production lifecycle support.
Supply support for BAT54WFILM 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The BAT54 series belongs to ST's small-signal discrete portfolio, engineered specifically for high-efficiency, high-frequency switching in compact power management and signal conditioning systems where low VF, low C, and fast trr are essential.
FAQ
What is the maximum soldering temperature for BAT54WFILM?
The maximum peak soldering temperature for BAT54WFILM is 260 °C, per JEDEC J-STD-020, with exposure limited to 30 seconds. This aligns with standard lead-free reflow profiles and ensures no degradation of the ECOPACK®2-compliant molding compound or internal metallization.
Can BAT54WFILM replace BAT54FILM in a design?
No - BAT54WFILM uses SOT-323 packaging (1.8 × 1.3 mm), while BAT54FILM uses SOT-23 (3.0 × 1.4 mm). Pin-to-pin compatibility is absent due to different terminal spacing, pad layout, and thermal resistance (550 vs. 500 °C/W). Layout redesign is required for substitution.
Is BAT54WFILM suitable for reverse polarity protection?
Yes - with its 40 V VRRM and 300 mA IF rating, BAT54WFILM can serve as a low-loss reverse polarity protection diode in 3.3 V or 5 V systems. However, forward voltage drop introduces ~0.9 V loss at full load, so it is best suited for low-current or auxiliary rails where MOSFET-based protection is impractical.
Does BAT54WFILM have a specified moisture sensitivity level (MSL)?
Yes - BAT54WFILM is rated MSL1 per IPC/JEDEC J-STD-020, meaning it has unlimited floor life at ≤30 °C/60% RH and requires no baking prior to assembly. This is confirmed by ST's ECOPACK®2 qualification and tape-and-reel packaging with dry nitrogen environment.
BAT54WFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 300mA
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 100 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 30 V
- Capacitance @ Vr, F:
- 10pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- -40°C ~ 150°C
BAT54WFILM FAQ
1.How can I place an order for BAT54WFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54WFILM 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 BAT54WFILM reliable?
The price and inventory of BAT54WFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54WFILM is usually 5 days.
3.What payment methods are accepted for BAT54WFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54WFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54WFILM?
BAT54WFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54WFILM 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 BAT54WFILM?
For technical support, including BAT54WFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54WFILM requirements.
6.How does Aetrix verify that BAT54WFILM is sourced from the original manufacturer or authorized distributors?
All BAT54WFILM 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 BAT54WFILM meets industry standards.
7.What is the process for return or replacement of BAT54WFILM?
All BAT54WFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT54WFILM, 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 BAT54WFILM part is unused and in its original packaging.
Return procedure for BAT54WFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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