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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

STMicroelectronics BAT54FILM

Name: BAT54FILM
Brand: STMicroelectronics
SKU: BAT54FILM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAT54FILM

Manufacturer:: STMicroelectronics

Category:: Single Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BAT54FILM.pdf

Description:: DIODE SCHOTTKY 40V 300MA SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:32,191

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Product details

Overview

BAT54FILM from STMicroelectronics is a single Schottky barrier diode optimized for high-speed switching in low-voltage, low-current signal routing applications. It features 40 V repetitive peak reverse voltage (V_RRM), 300 mA continuous forward current (I_F), 7 pF typical junction capacitance (C), and 5 ns reverse recovery time (t_rr), enabling use in USB data line protection and RF detector circuits.

For engineers reviewing the BAT54FILM datasheet, BAT54FILM pinout, BAT54FILM application, or BAT54FILM equivalent, key selection criteria include low forward voltage drop (240 mV at 0.1 mA), negligible switching losses, ECOPACK®2 compliance, SOT-23 package thermal resistance (500 °C/W), and operation across –40 to +150 °C junction temperature range.

Technical Context

The BAT54FILM implements a planar Schottky barrier structure with platinum-silicide contact, delivering fast unidirectional conduction without minority-carrier storage delay. Its low 0.1 µA reverse leakage at 30 V (T_j = 25 °C) and 100 µA at 100 °C supports stable biasing in precision analog front-ends.

Designed for surface-mount assembly on epoxy FR4 PCBs, it leverages SOT-23's standardized pad layout to achieve 500 °C/W junction-to-ambient thermal resistance under recommended copper land patterns - critical for sustained 300 mA operation in compact power management nodes.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Withstands up to 40 V reverse bias without breakdown in signal path isolation.
I_F	300 mA - Supports continuous forward conduction in low-power logic-level clamping.
t_rr	5 ns - Enables sub-10 ns switching transitions in high-frequency envelope detection.
C (typ)	7 pF - Minimizes capacitive loading on 50 Ω RF lines and high-speed digital I/O.
V_F @ 10 mA	400 mV - Reduces forward power loss and voltage offset in precision rectifier designs.
T_j max	+150 °C - Allows reliable operation in thermally constrained automotive cabin modules.

Pinout & Package

Package: SOT-23 - Three-terminal plastic surface-mount package with standard JEDEC TO-236AB outline, 1.4 mm body width, and 2.75–3.04 mm length; designed for reflow soldering at 260 °C peak.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Forward current entry point	Connected to source of low-side switch or signal input in clamp configuration.
2 (Cathode)	Forward current exit / reverse blocking node	Connected to ground or reference rail; defines polarity of rectification path.
3 (Anode)	Not connected (NC) - internal die bond wire stub	No electrical function; must remain unconnected per STMicroelectronics design.

Key Features

Feature	Design Value
Low conduction loss	V_F = 240 mV at 0.1 mA enables near-zero threshold clamping in sensor bias networks.
Negligible switching losses	Absence of minority-carrier storage eliminates tail current, reducing dynamic power in 10+ MHz clocked detectors.
Extremely fast switching	5 ns t_rr supports clean edge preservation in 100 Mbps USB 2.0 data line protection.
ECOPACK®2 compliance	Lead-free, halogen-free, RoHS-compliant construction meets automotive and industrial environmental mandates.

Applications

USB 2.0 Data Line Protection

RF Signal Detector

Use Scenario: Bidirectional ESD protection and DC bias isolation on D+ and D− lines of USB 2.0 transceivers.

IC Role / Device Role: Low-capacitance Schottky clamp diode placed between data line and 3.3 V rail.

Use Value: 7 pF capacitance prevents signal integrity degradation at 480 Mbps; 400 mV V_F ensures minimal voltage shift during active clamping.

Use Scenario: Envelope detection in 900 MHz ISM-band receiver front-ends.

IC Role / Device Role: Signal rectifier converting RF amplitude to baseband DC voltage.

Use Value: 5 ns t_rr enables accurate detection of short-duration RF bursts; low V_F improves sensitivity below –20 dBm.

Precision Analog Clamp

Low-Power Logic-Level Shifter

Use Scenario: Input voltage limiting in instrumentation amplifier front-ends handling ±10 V sensor signals.

IC Role / Device Role: Dual-rail clamp using BAT54FILM anodes tied to ±3.3 V rails.

Use Value: 0.1 µA reverse leakage at 30 V preserves high-impedance node accuracy; 150 °C T_j max supports industrial ambient operation.

Use Scenario: Level translation between 1.8 V microcontroller GPIO and 3.3 V peripheral interface.

IC Role / Device Role: Passive pull-up-assisted shifter with BAT54FILM cathode at 3.3 V and anode at 1.8 V node.

Use Value: 240 mV V_F at 0.1 mA ensures <100 mV voltage drop, maintaining valid logic HIGH thresholds across temperature.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
NSR0230HT1G	Lower V_F (220 mV @ 0.1 mA), same SOT-23 package, but 30 V V_RRM (vs. 40 V)	Limited to ≤30 V systems; unsuitable for 36 V automotive supply monitoring.	Select when lower forward drop outweighs reverse voltage margin.
1N5711	Higher V_F (500 mV @ 10 mA), DO-35 glass package, 70 V V_RRM, no RoHS compliance	Through-hole only; incompatible with automated SMT assembly; higher parasitic inductance limits >10 MHz use.	Choose only for legacy through-hole prototyping or non-RoHS environments.

Compared with NSR0230HT1G and 1N5711, BAT54FILM uniquely balances 40 V reverse rating, 7 pF capacitance, SOT-23 manufacturability, and ECOPACK®2 compliance - making it optimal for new USB, RF, and industrial SMT designs requiring full spec margin and regulatory alignment.

Availability

BAT54FILM is available at Aetrix Electronics and suitable for USB 2.0 interface protection, RF envelope detection, and precision analog clamping requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for BAT54FILM 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 Schottky diode product line, engineered specifically for high-speed, low-loss signal routing and protection in space-constrained, high-frequency PCB layouts.

FAQ

What is the maximum reverse voltage the BAT54FILM can withstand?

The BAT54FILM has a repetitive peak reverse voltage (V_RRM) rating of 40 V, verified per Table 2 of STMicroelectronics' DocID5505 Rev 12. This is the absolute maximum reverse-bias voltage that may be applied continuously without risk of avalanche breakdown under specified thermal conditions.

Does BAT54FILM have a built-in thermal shutdown mechanism?

No. The BAT54FILM is a passive discrete Schottky diode with no integrated thermal protection circuitry. Safe operation depends on external thermal design - including PCB copper area, ambient temperature, and duty cycle - to maintain junction temperature within the –40 to +150 °C range specified in Table 2.

Can BAT54FILM be used in place of BAT54C or BAT54A in common-cathode or common-anode configurations?

No. BAT54FILM is a single-diode variant in SOT-23. BAT54C (common cathode) and BAT54A (common anode) contain two diodes sharing one terminal; their pinouts and internal topology differ fundamentally. Substitution would require board-level redesign and violates functional equivalence per ST's ordering table.

Is BAT54FILM suitable for 2.4 GHz Wi-Fi antenna switching?

No. While its 7 pF capacitance is low, the BAT54FILM's 40 V V_RRM and 300 mA I_F are over-specified for RF switching; more appropriate devices include dedicated GaAs or CMOS RF switches (e.g., Qorvo QM11037) offering <0.5 dB insertion loss and >30 dB isolation at 2.4 GHz - parameters not supported by this Schottky diode.

BAT54FILM 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

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-23-3

Operating Temperature - Junction:: -40°C ~ 150°C

BAT54FILM FAQ

1.How can I place an order for BAT54FILM through Aetrix?

Please submit a Request for Quotation (RFQ) for BAT54FILM 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 BAT54FILM reliable?

The price and inventory of BAT54FILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54FILM is usually 5 days.

3.What payment methods are accepted for BAT54FILM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54FILM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAT54FILM?

BAT54FILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAT54FILM 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 BAT54FILM?

For technical support, including BAT54FILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54FILM requirements.

6.How does Aetrix verify that BAT54FILM is sourced from the original manufacturer or authorized distributors?

All BAT54FILM 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 BAT54FILM meets industry standards.

7.What is the process for return or replacement of BAT54FILM?

All BAT54FILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT54FILM, 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 BAT54FILM part is unused and in its original packaging.

Return procedure for BAT54FILM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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