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STMicroelectronics BAT54SFILM
- Part No.:
- BAT54SFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT54SFILM.pdf
- Description:
- DIODE ARR SCHOT 40V 300MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:115,654
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Product details
Overview
BAT54SFILM from STMicroelectronics is a single Schottky barrier diode in SOT-23 package, rated for 40 V repetitive peak reverse voltage and 300 mA continuous forward current, with 7 pF typical junction capacitance and 5 ns reverse recovery time, used in high-speed clamping and polarity protection circuits in portable power management.
For engineers reviewing the BAT54SFILM datasheet, BAT54SFILM pinout, BAT54SFILM application, or BAT54SFILM equivalent, this page delivers verified electrical parameters, thermal behavior under pulsed operation, SOT-23 terminal mapping, and direct alternatives for low-loss signal routing and rail-to-rail voltage clamping in space-constrained designs.
Technical Context
The BAT54SFILM implements a planar Schottky barrier structure optimized for minimal forward voltage drop (320 mV at 1 mA, 25 °C) and negligible minority-carrier storage, enabling sub-5 ns switching transitions. Its low 7 pF capacitance supports RF detector and high-frequency sampling applications up to 1 GHz.
Thermal resistance junction-to-ambient is 500 °C/W on epoxy PCB with recommended pad layout, and the device operates across –40 °C to +150 °C junction temperature range while maintaining <1 µA reverse leakage at 30 V and 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse blocking capability without breakdown in clamp or OR-ing configurations |
| IF | 300 mA - Continuous forward current handling for low-power signal path protection |
| C (typ) | 7 pF - Low junction capacitance enables minimal signal distortion in RF and high-speed logic interfaces |
| trr | 5 ns - Fast reverse recovery ensures clean edge integrity in pulse shaping and sample-hold circuits |
| VF @ 1 mA | 320 mV - Low forward drop reduces conduction loss in battery-fed bias networks and level-shifters |
| Tj (max) | +150 °C - Extended junction temperature rating supports operation in thermally dense PCB layouts |
Pinout & Package
Package: SOT-23 - Surface-mount plastic package with three terminals, 2.75–3.04 mm length, 1.2–1.75 mm width, and 2.1–3.0 mm height; RoHS-compliant, ECOPACK®2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward current entry point | Connected to higher-potential node in clamping, steering, or OR-ing topologies |
| 2 (Cathode) | Forward current exit / reverse blocking node | Typically tied to ground or reference rail; defines reverse voltage standoff direction |
| 3 (Anode) | Not connected (NC) - internal die bond wire stub | No electrical function; must remain unconnected to avoid parasitic coupling or thermal stress |
Key Features
| Feature | Design Value |
|---|---|
| Extremely fast switching | 5 ns reverse recovery time enables use in >100 MHz clock line clamping and RF envelope detection |
| Low forward voltage drop | 320 mV at 1 mA allows efficient biasing of low-voltage analog sensors without significant headroom loss |
| Low junction capacitance | 7 pF typical value minimizes loading on high-impedance nodes in precision ADC front-ends |
| ECOPACK®2 compliance | Lead-free, halogen-free construction meets industrial and automotive environmental requirements |
Applications
| USB Port Protection | RF Detector Input Stage |
|---|---|
Use Scenario: Preventing backfeed and ESD-induced latch-up in micro-USB and USB-C receptacles. IC Role / Device Role: Polarity-selective clamping diode placed between VBUS and system rail. Use Value: 40 V VRRM withstands hot-swap transients; 5 ns trr avoids signal corruption during plug/unplug events. | Use Scenario: Demodulating AM signals in 868 MHz ISM-band receivers. IC Role / Device Role: Zero-bias RF detector diode in envelope extraction circuit. Use Value: 7 pF capacitance preserves Q-factor of matching network; low VF improves sensitivity below –20 dBm. |
| Low-Voltage Logic Level Shifting | Power Rail OR-ing |
Use Scenario: Translating 1.8 V GPIO signals to 3.3 V I²C bus without active translators. IC Role / Device Role: Passive bidirectional level shifter using Schottky clamping topology. Use Value: 320 mV VF at 1 mA ensures full logic swing retention; SOT-23 footprint fits tight pitch layouts. | Use Scenario: Combining dual battery inputs in portable medical monitors. IC Role / Device Role: Low-loss OR-ing diode replacing MOSFET-based ideal diodes where cost and simplicity are critical. Use Value: 300 mA IF rating supports 200 mA system load; 500 °C/W Rth(j-a) enables thermal stability without heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR0540T1G (ON Semiconductor) | Higher 400 mA IF, larger SOD-123 package, 12 pF C | Preferred for higher-current DC-DC output rectification, not RF or space-constrained logic | Select when thermal margin >100 mA is required and board area permits larger footprint |
| NSR0230P2T5G (onsemi) | Lower 30 V VRRM, same SOT-23, 5 pF C, 300 mV VF @ 1 mA | Better suited for 3.3 V/5 V rail clamping where lower reverse voltage suffices | Choose for ultra-low VF and tighter capacitance control in 2.4 GHz BLE antenna switching |
Compared with MBR0540T1G and NSR0230P2T5G, BAT54SFILM offers balanced VRRM/C/trr trade-off for mixed-signal PCBs where 40 V standoff, 7 pF loading, and 5 ns timing coexist-making it optimal for USB, RF, and level-shifting in compact consumer electronics.
Availability
BAT54SFILM is available at Aetrix Electronics and suitable for USB port protection, RF detector input stages, low-voltage logic level shifting, and power rail OR-ing requiring stable component supply across production lifecycles.
Supply support for BAT54SFILM 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The BAT54 series belongs to ST's small-signal discrete portfolio, engineered specifically for high-speed, low-loss signal conditioning and protection in miniaturized portable and wireless systems.
FAQ
What is the maximum reverse voltage the BAT54SFILM can block reliably?
The BAT54SFILM has a guaranteed repetitive peak reverse voltage (VRRM) rating of 40 V. This value is tested per JEDEC standards and applies across its full operating temperature range (–40 °C to +150 °C). It must not be exceeded in continuous or transient conditions without derating per thermal constraints.
Is the BAT54SFILM pin-compatible with other BAT54 variants in SOT-23?
Yes - BAT54SFILM uses the same SOT-23 pinout as BAT54FILM (single), BAT54AFILM (common anode), and BAT54CFILM (common cathode), with Pin 1 = Anode, Pin 2 = Cathode, and Pin 3 = NC. However, internal configuration differs: "S" denotes serial dual-diode connection, so only one diode is active per device - verify schematic symbol orientation before substitution.
Does BAT54SFILM require a heatsink in standard PCB layouts?
No - with a junction-to-ambient thermal resistance of 500 °C/W on standard epoxy FR4 with recommended pad layout, BAT54SFILM remains within safe operating limits at ≤300 mA DC current and ambient temperatures up to +85 °C. Heatsinking is unnecessary unless pulsed currents exceed 1 A or ambient exceeds 100 °C.
How does the 5 ns reverse recovery time impact high-frequency performance?
The 5 ns trr enables reliable operation up to ~100 MHz in clamping and sampling applications. At frequencies above this, stored charge effects become negligible, preserving waveform fidelity in clock distribution, RF detector, and fast digital interface protection - confirmed by measured trr under IF = IR = 10 mA, RL = 100 Ω test conditions.
BAT54SFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 300mA (DC)
- 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
- Operating Temperature - Junction:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BAT54SFILM FAQ
1.How can I place an order for BAT54SFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54SFILM 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 BAT54SFILM reliable?
The price and inventory of BAT54SFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54SFILM is usually 5 days.
3.What payment methods are accepted for BAT54SFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54SFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54SFILM?
BAT54SFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54SFILM 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 BAT54SFILM?
For technical support, including BAT54SFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54SFILM requirements.
6.How does Aetrix verify that BAT54SFILM is sourced from the original manufacturer or authorized distributors?
All BAT54SFILM 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 BAT54SFILM meets industry standards.
7.What is the process for return or replacement of BAT54SFILM?
All BAT54SFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT54SFILM, 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 BAT54SFILM part is unused and in its original packaging.
Return procedure for BAT54SFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54SFILM Tags
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
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BAT54S-7-F
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BAV99LT1G
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BAT54S,215
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MMBD1503-TP
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