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STMicroelectronics BAR43FILM
- Part No.:
- BAR43FILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAR43FILM.pdf
- Description:
- DIODE SCHOTTKY 30V 100MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:46,411
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Product details
Overview
BAR43FILM from STMicroelectronics is a single small-signal Schottky diode in SOT23-3L package, designed for low-voltage, high-speed switching applications with 0.33 V max forward voltage at 2 mA, 30 V repetitive peak reverse voltage, and 500 nA reverse leakage at 25 °C. It operates up to 150 °C junction temperature and is used in polarity protection and signal clamping circuits in portable power management.
For engineers reviewing the BAR43FILM datasheet, BAR43FILM pinout, BAR43FILM application, or BAR43FILM equivalent, key selection criteria include its low VF at microamp-level bias, fast recovery time (80 ps), minimal junction capacitance (7 pF), thermal resistance (500 °C/W), and SOT23-3L footprint compatibility with space-constrained PCB layouts.
Technical Context
The BAR43FILM employs a metal-to-silicon Schottky barrier structure enabling negligible minority-carrier storage and sub-nanosecond reverse recovery. Its low turn-on voltage arises from optimized anode metallization and shallow junction depth, supporting operation down to 2 mA forward current while maintaining stable VF across temperature.
Thermal performance is defined by Rth(j-a) = 500 °C/W on FR4 epoxy board with recommended pad layout, and absolute maximum ratings include 0.1 A continuous forward current and 0.75 A non-repetitive surge current (10 ms sine). The device is rated for soldering up to 260 °C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in clamp/protection circuits |
| VF (max) | 0.33 V at IF = 2 mA - Enables efficient signal-level rectification and low-loss biasing in ultra-low-power receivers |
| IR (max) | 500 nA at VR = 30 V, Tj = 25 °C - Ensures minimal leakage in high-impedance sensing nodes and battery-backed circuits |
| trr | 80 ps - Supports RF detection and high-frequency signal routing without distortion or timing skew |
| CJ | 7 pF at VR = 1 V, f = 1 MHz - Limits capacitive loading on high-speed data lines and antenna interfaces |
| Tj (max) | 150 °C - Allows deployment in thermally demanding environments such as automotive body control modules |
| Ptot | 250 mW at Tamb = 25 °C - Sets practical power handling limit for continuous operation without heatsinking |
Pinout & Package
SOT23-3L surface-mount package with gull-wing leads, UL94 V0-compliant epoxy body, and lead-free construction per ECOPACK® standards. Dimensions conform to JEDEC MO-215, with typical footprint area of 2.75 mm × 1.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in polarity protection or clamping; requires low-inductance trace routing |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Typically tied to ground or reference rail; serves as clamp reference in ESD protection paths |
| No Connect (Pin 3) | Unused internal terminal | Electrically isolated; must remain unconnected to avoid parasitic coupling or mechanical stress on die bond wire |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | 0.26 V typ. at 2 mA - Reduces conduction loss in battery-fed signal paths where voltage headroom is <0.5 V |
| Sub-100 ps reverse recovery | 80 ps - Eliminates tail current in RF detector stages, preserving signal integrity above 100 MHz |
| Low junction capacitance | 7 pF - Minimizes signal attenuation and phase shift in 45 MHz AM/FM demodulator front-ends |
| High-temperature operation | 150 °C max Tj - Supports placement near heat-generating ICs in compact DC/DC converter modules |
| ECOPACK® lead-free compliance | Meets RoHS and JEDEC J-STD-020 reflow profiles - Ensures manufacturability in standard SMT lines without process deviation |
Applications
| USB Port Polarity Protection | RF Signal Detector |
|---|---|
Use Scenario: Preventing damage from reversed USB cable insertion in portable chargers and OTG accessories. IC Role / Device Role: Low-VF series diode providing unidirectional current path with <0.35 V drop at 100 mA. Use Value: Maintains >4.65 V at VBUS under full load, avoiding brown-out in connected peripherals. | Use Scenario: Demodulating AM signals in low-cost FM radio receivers. IC Role / Device Role: Schottky envelope detector with minimal junction capacitance and fast response. Use Value: Achieves >80% detection efficiency at 45 MHz with 2 V input amplitude and 50 Ω source impedance. |
| Low-Power Sensor Bias Clamp | ESD Input Protection |
Use Scenario: Clamping analog sensor outputs (e.g., thermistor bridges) to prevent ADC saturation during transients. IC Role / Device Role: Fast-turn-on clamp diode limiting voltage excursions to ±0.4 V beyond rail. Use Value: Limits overvoltage to <100 ns duration with <500 nA leakage at 25 °C, preserving measurement accuracy. | Use Scenario: Protecting I²C bus pins against ±8 kV HBM ESD events in industrial controllers. IC Role / Device Role: Low-capacitance shunt path diverting ESD current away from sensitive transceivers. Use Value: Adds only 7 pF capacitance to signal line, avoiding rise-time degradation beyond 100 ns for 400 kHz clock. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | 0.45 V VF max at 2 mA; 10 pF CJ; SOD-523 package | Higher VF increases conduction loss in micro-power bias networks | Prefer when board space is more constrained than voltage budget |
| BAT54C,215 | Dual common-cathode configuration; 0.33 V VF max per diode; 10 pF CJ | Requires layout redesign for single-diode use; adds unused channel capacitance | Choose when dual-diode topology matches existing schematic reuse needs |
Compared with NSR0230HT1G and BAT54C,215, BAR43FILM delivers the lowest VF at sub-mA bias and smallest junction capacitance in SOT23-3L, making it optimal for precision low-current clamping and RF detection where both voltage headroom and bandwidth are critical.
Availability
BAR43FILM is available at Aetrix Electronics and suitable for USB port protection, RF signal detection, low-power sensor bias clamping, and ESD input protection requiring stable component supply across production lifecycles.
Supply support for BAR43FILM 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, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The BAR43FILM belongs to ST's general-purpose Schottky diode product line, engineered specifically for applications demanding ultra-low forward voltage, fast switching, and reliable operation in compact surface-mount packages.
FAQ
What is the maximum continuous forward current rating for BAR43FILM?
The BAR43FILM has a continuous forward current rating of 0.1 A at ambient temperature (Tamb = 25 °C). Derating is required above 25 °C per the thermal resistance specification (Rth(j-a) = 500 °C/W); at 85 °C ambient, maximum usable IF(AV) drops to approximately 50 mA to maintain Tj ≤ 150 °C.
Is BAR43FILM suitable for RF detector applications at 45 MHz?
Yes. With 7 pF junction capacitance at 1 V reverse bias and 80 ps reverse recovery time, BAR43FILM meets the low-capacitance and fast-response requirements for AM envelope detection at 45 MHz. ST's datasheet confirms >80% detection efficiency under 2 V input, 50 Ω source, and 300 pF load conditions.
Does BAR43FILM have a specified reverse recovery charge (Qrr)?
No. The BAR43FILM datasheet does not specify Qrr because Schottky diodes are majority-carrier devices with no minority-carrier storage; reverse recovery is governed by junction capacitance discharge rather than stored charge removal. trr = 80 ps reflects the RC-limited discharge time, not Qrr-driven delay.
Can BAR43FILM be used in place of BAR42FILM in existing designs?
Yes, with functional trade-offs. BAR43FILM offers lower VF (0.33 V max at 2 mA vs. 0.40 V for BAR42), but slightly higher VF at higher currents (0.45 V at 100 mA vs. 0.40 V). Pinout and package are identical; substitution is electrically safe where low-bias VF is prioritized over high-current conduction loss.
BAR43FILM 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):
- 30 V
- Current - Average Rectified (Io):
- 100mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 500 nA @ 30 V
- Capacitance @ Vr, F:
- 7pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
- Operating Temperature - Junction:
- 150°C (Max)
BAR43FILM FAQ
1.How can I place an order for BAR43FILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAR43FILM 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 BAR43FILM reliable?
The price and inventory of BAR43FILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAR43FILM is usually 5 days.
3.What payment methods are accepted for BAR43FILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAR43FILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAR43FILM?
BAR43FILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAR43FILM 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 BAR43FILM?
For technical support, including BAR43FILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAR43FILM requirements.
6.How does Aetrix verify that BAR43FILM is sourced from the original manufacturer or authorized distributors?
All BAR43FILM 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 BAR43FILM meets industry standards.
7.What is the process for return or replacement of BAR43FILM?
All BAR43FILM units undergo pre-shipment inspection (PSI). If there is an issue with BAR43FILM, 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 BAR43FILM part is unused and in its original packaging.
Return procedure for BAR43FILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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