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STMicroelectronics BAR43CFILM
- Part No.:
- BAR43CFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAR43CFILM.pdf
- Description:
- DIODE ARR SCHOT 30V 100MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:17,282
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Product details
Overview
BAR43CFILM from STMicroelectronics is a dual-channel small-signal Schottky diode in SOT23-3L package, designed for low-voltage, high-speed switching applications. It features a maximum forward voltage of 0.33 V at 2 mA, 30 V repetitive peak reverse voltage, 150 °C junction temperature rating, and 7 pF junction capacitance at 1 V reverse bias - enabling use in RF detector circuits and high-frequency signal clamping.
For engineers reviewing the BAR43CFILM datasheet, BAR43CFILM pinout, BAR43CFILM application, or BAR43CFILM equivalent, key selection criteria include its ultra-low VF at microamp-level currents, negligible reverse recovery time (<80 ps), thermal resistance of 500 °C/W on standard FR4, and compatibility with lead-free reflow soldering up to 260 °C.
Technical Context
The BAR43CFILM integrates two independent Schottky junctions in a single SOT23-3L package with common cathode configuration (Pin 1: Anode A, Pin 2: Cathode, Pin 3: Anode B). Its metal–silicon junction enables sub-0.4 V turn-on at low currents and eliminates minority-carrier storage delay.
It operates within –65 °C to +150 °C storage range and supports surge forward current up to 0.75 A (10 ms sine half-wave). Thermal design requires attention to pad copper area: Rth(j-a) drops from 500 °C/W to ~300 °C/W with ≥25 mm² Cu per lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VF (max) | 0.33 V at IF = 2 mA - enables efficient signal detection below 0.5 V input levels |
| VRRM | 30 V - supports operation in 24 V industrial bus interfaces and RF bias networks |
| IR (max) | 100 µA at Tj = 100 °C - ensures stable DC blocking in temperature-critical sensor front-ends |
| Cj | 7 pF at VR = 1 V - minimizes capacitive loading in 45 MHz detector and mixer applications |
| trr | <80 ps - allows clean zero-crossing detection in fast-switching clock recovery paths |
| Ptot | 250 mW at Tamb = 25 °C - limits usable continuous power to ~100 mW in compact PCB layouts |
| Rth(j-a) | 500 °C/W - mandates thermal pad design for >50 mW average dissipation |
Pinout & Package
SOT23-3L package with gull-wing leads, JEDEC-compliant footprint (D = 2.75–3.04 mm, E = 1.2–1.6 mm, e1 = 1.7–2.1 mm), UL94 V0 epoxy body, and lead-free termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode A | First Schottky junction anode - connects to RF input or signal source in detector topology |
| 2 | Cathode (common) | Shared cathode node - ties both diodes to bias rail or ground reference |
| 3 | Anode B | Second Schottky junction anode - used for dual-path clamping or balanced detection |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | 0.26 V (typ) at 2 mA - reduces detection threshold in battery-powered RF sensors |
| Fast switching performance | Reverse recovery time <80 ps - preserves signal integrity in 45 MHz AM demodulation |
| Thermally robust construction | 150 °C max junction temperature - supports operation in enclosed industrial enclosures |
| Surface-mount compatibility | SOT23-3L footprint - enables automated placement in high-density RF modules |
| Lead-free and RoHS compliant | ECOPACK®2 grade - meets IPC-J-STD-020 moisture sensitivity level 1 (MSL1) |
Applications
| RF Signal Detector | Low-Voltage Clamp |
|---|---|
Use Scenario: Demodulating 45 MHz AM signals in portable wireless receivers with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Schottky detector diode converting RF envelope to baseband DC voltage. Use Value: 0.26 V typical VF enables reliable detection down to 300 mV RF input amplitude without external bias. | Use Scenario: Protecting ADC inputs from transient overvoltage in automotive sensor signal conditioning. IC Role / Device Role / Timing Role: Bidirectional clamp limiting analog input swing to ±0.33 V above/below rail. Use Value: 7 pF junction capacitance avoids bandwidth degradation in 100 kHz–1 MHz sensor channels. |
| High-Speed Logic Interface | DC-DC Converter Feedback |
Use Scenario: Level-shifting between 1.8 V logic and 3.3 V I/O in FPGA configuration interfaces. IC Role / Device Role / Timing Role: Passive clamping diode preventing overshoot on bidirectional data lines. Use Value: Sub-80 ps trr prevents latch-up during 100+ MHz toggle transitions. | Use Scenario: Voltage sensing in synchronous buck converter feedback path with 5 V output. IC Role / Device Role / Timing Role: Low-leakage path for optocoupler-based isolated feedback loop. Use Value: 500 nA IR at 25 °C maintains <0.1% error in 10 kΩ feedback divider at room temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky detector diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAR43FILM | Same die, different marking (D95 vs DB2); identical electrical specs and thermal behavior | No functional difference - used interchangeably in same PCB footprints | Select when BAR43CFILM is unavailable; no redesign required |
| NSR0230HT1G | Single diode, 30 V VRRM, 0.32 V VF @ 10 mA, SOD-323 package, higher IR (2 µA @ 25 °C) | Lacks dual-anode configuration; unsuitable for balanced detector topologies | Use only for single-path clamping where space constraints prohibit SOT23-3L |
Compared with BAR43FILM, BAR43CFILM offers identical performance but distinct traceability; versus NSR0230HT1G, it provides dual-anode flexibility and lower leakage at elevated temperatures - critical for precision RF detection.
Availability
BAR43CFILM is available at Aetrix Electronics and suitable for RF detector modules, low-voltage clamping circuits, high-speed logic interface protection, and isolated DC-DC feedback networks requiring stable component supply across production lifecycles.
Supply support for BAR43CFILM 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 industrial, automotive, and consumer markets.
The BAR43 series belongs to ST's general-purpose discrete diode product line, engineered specifically for high-frequency signal integrity and low-power detection in space-constrained RF and portable electronics.
FAQ
What is the pin configuration of BAR43CFILM?
BAR43CFILM uses a common-cathode dual-Schottky configuration in SOT23-3L: Pin 1 is Anode A, Pin 2 is shared Cathode, and Pin 3 is Anode B. This layout supports balanced detection and dual-path clamping without external interconnects.
Does BAR43CFILM support lead-free reflow soldering?
Yes - BAR43CFILM is qualified for lead-free reflow per JEDEC J-STD-020, with maximum soldering temperature of 260 °C for 10 seconds. Its ECOPACK®2 compliance confirms full RoHS and halogen-free material content.
How does BAR43CFILM differ from BAR42FILM?
BAR43CFILM has lower forward voltage (0.26 V typ at 2 mA) than BAR42FILM (0.35 V typ at 10 mA), optimized for micro-current detection. BAR42 offers higher current capability (IF(AV) = 0.1 A same), but BAR43 excels in ultra-low-threshold RF applications.
Can BAR43CFILM be used in place of a single Schottky diode?
Yes - either anode (Pin 1 or Pin 3) can be used independently with the common cathode (Pin 2), effectively functioning as a single Schottky diode. Unused anode must be left open or tied to cathode; floating anode does not degrade performance.
BAR43CFILM 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 Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io) (per Diode):
- 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
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BAR43CFILM FAQ
1.How can I place an order for BAR43CFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAR43CFILM 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 BAR43CFILM reliable?
The price and inventory of BAR43CFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAR43CFILM is usually 5 days.
3.What payment methods are accepted for BAR43CFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAR43CFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAR43CFILM?
BAR43CFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAR43CFILM 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 BAR43CFILM?
For technical support, including BAR43CFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAR43CFILM requirements.
6.How does Aetrix verify that BAR43CFILM is sourced from the original manufacturer or authorized distributors?
All BAR43CFILM 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 BAR43CFILM meets industry standards.
7.What is the process for return or replacement of BAR43CFILM?
All BAR43CFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAR43CFILM, 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 BAR43CFILM part is unused and in its original packaging.
Return procedure for BAR43CFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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