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STMicroelectronics BAR43SFILM
- Part No.:
- BAR43SFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAR43SFILM.pdf
- Description:
- DIODE ARR SCHOT 30V 100MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:38,091
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Product details
Overview
BAR43SFILM from STMicroelectronics is a single-channel small-signal Schottky diode in SOT23-3L package, designed for low-voltage, high-speed switching applications. It features a maximum forward voltage drop of 0.33 V at 2 mA, 30 V repetitive peak reverse voltage (VRRM), 150 °C maximum junction temperature, and 7 pF junction capacitance at 1 V reverse bias - enabling use in RF detector circuits and low-loss signal clamping.
For engineers reviewing the BAR43SFILM datasheet, BAR43SFILM pinout, BAR43SFILM application, or BAR43SFILM equivalent, key selection criteria include its ultra-low VF at microamp-level currents, negligible reverse recovery time (<80 ps), tight thermal resistance (500 °C/W), and compatibility with lead-free reflow soldering up to 260 °C.
Technical Context
The BAR43SFILM employs a metal-to-silicon Schottky barrier structure optimized for minimal conduction loss and near-zero minority-carrier storage. Its fast switching behavior stems from majority-carrier conduction and absence of reverse recovery charge, making it suitable for high-frequency detection and sampling circuits.
It operates within a junction temperature range of –65 °C to +150 °C and is rated for continuous forward current of 0.1 A. Thermal performance is specified with Rth(j-a) = 500 °C/W on an epoxy FR4 board using ST's recommended pad layout, supporting stable operation under pulsed or low-duty-cycle conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse voltage before breakdown; defines safe operating limit in clamp/detector configurations |
| VF (max) | 0.33 V at IF = 2 mA - Enables efficient signal rectification at very low drive levels, critical for RF envelope detection |
| IR (max) | 100 µA at Tj = 100 °C - Low leakage preserves signal integrity in high-impedance sensing nodes |
| CJ | 7 pF at VR = 1 V - Minimizes capacitive loading in 45 MHz+ detection paths (e.g., AM/FM demodulation) |
| trr | <80 ps - Supports sub-nanosecond switching; eliminates timing skew in pulse shaping and sampling gates |
| Ptot | 250 mW at Tamb = 25 °C - Limits power handling in compact SOT23-3L footprint; requires thermal-aware PCB layout |
Pinout & Package
SOT23-3L surface-mount package with gull-wing leads, UL94 V0-compliant epoxy molding compound, and lead-free finish compliant with ECOPACK® standards. Dimensions per ST DocID3288 Rev 5: D = 2.75–3.04 mm, E = 1.2–1.6 mm, e1 = 1.7–2.1 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connected to input signal or bias rail in detector/clamp topologies |
| 2 | Cathode | Current return path; tied to ground or reference node to establish unidirectional conduction |
| 3 | No Connection (NC) | Internally unconnected terminal; must remain floating - not used for thermal pad or grounding |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | 0.26 V (typ.) at 2 mA - reduces signal loss in weak-input RF detectors and precision clamp circuits |
| Negligible switching losses | trr < 80 ps - eliminates tail current and enables clean edge transitions in sampling applications |
| Low junction capacitance | 7 pF at 1 V - maintains high-frequency response without parasitic roll-off in 45 MHz+ signal paths |
| High thermal reliability | Tj(max) = 150 °C with Rth(j-a) = 500 °C/W - supports sustained operation in space-constrained industrial sensor modules |
Applications
| AM/FM Radio Detector | Low-Voltage Clamp Circuit |
|---|---|
Use Scenario: Demodulating amplitude-modulated signals in portable radio receivers operating from 1.8 V coin-cell supplies. IC Role / Device Role / Timing Role: Signal rectifier and envelope extractor; conducts only during positive half-cycles with minimal voltage offset. Use Value: 0.33 V VF ensures >90% signal transfer efficiency at µA-level input currents, preserving SNR in battery-powered receivers. | Use Scenario: Protecting ADC inputs from transient overvoltage in automotive body control modules. IC Role / Device Role / Timing Role: Fast-acting voltage limiter; clamps spikes within nanoseconds while adding negligible DC offset. Use Value: 7 pF capacitance avoids bandwidth degradation; 30 V VRRM accommodates ISO 7637-2 pulse 5a surges without breakdown. |
| High-Speed Sampling Gate | Low-Power Logic-Level Shifter |
Use Scenario: Gating analog sample pulses in 10-bit SAR ADC front-ends for IoT sensor nodes. IC Role / Device Role / Timing Role: Bidirectional switch element controlled by CMOS clock; blocks hold capacitor discharge between samples. Use Value: Sub-80 ps trr prevents aperture jitter; 0.26 V VF minimizes sampling error in sub-1 V reference domains. | Use Scenario: Level translation between 1.2 V I²C master and 3.3 V peripheral in wearables. IC Role / Device Role / Timing Role: Passive bidirectional translator leveraging Schottky threshold asymmetry. Use Value: 0.33 V forward drop enables reliable turn-on at 1.2 V logic high, avoiding false low-state interpretation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAR43FILM | Same die, identical electrical specs; differs only in marking (D95 vs DA5) and reel packaging quantity (3000 vs unspecified) | No functional difference; both qualified for same production lots and environmental grades | Select BAR43FILM if standard tape-and-reel volume (3000 pcs) is required; BAR43SFILM may be allocated for special build or traceability needs |
| NSR0230HT1G | Higher IF(AV) = 0.2 A, VF = 0.32 V @ 10 mA, but CJ = 10 pF - larger junction area increases capacitance | Less suitable for >30 MHz detection; better for higher-current clamp or power-rail protection | Prefer NSR0230HT1G when forward current exceeds 100 mA or thermal margin is critical; avoid where <8 pF is mandatory |
Compared with BAR43FILM, BAR43SFILM offers identical performance with differentiated traceability; versus NSR0230HT1G, it trades higher current capability for lower capacitance and tighter low-current VF - making it optimal for RF detection and ultra-low-power clamping.
Availability
BAR43SFILM is available at Aetrix Electronics and suitable for AM/FM radio detectors, low-voltage clamp circuits, high-speed sampling gates, and low-power logic-level shifters requiring stable component supply across long-lifecycle industrial and consumer programs.
Supply support for BAR43SFILM 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 BAR43SFILM belongs to ST's general-purpose small-signal Schottky diode product line, engineered specifically for ultra-low VF and high-speed detection in battery-constrained and RF-sensitive applications.
FAQ
What is the maximum reverse voltage rating for BAR43SFILM?
The BAR43SFILM has a repetitive peak reverse voltage (VRRM) rating of 30 V, verified per STMicroelectronics DocID3288 Rev 5 absolute ratings table. This value applies under continuous DC or sinusoidal reverse bias up to 150 °C junction temperature, with no derating required below that limit.
Is BAR43SFILM compatible with lead-free reflow soldering processes?
Yes - BAR43SFILM is qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C for 10 seconds, as specified in Table 2 of the official datasheet. Its ECOPACK®-compliant SOT23-3L package meets JEDEC J-STD-020 moisture sensitivity level 1 requirements.
Does BAR43SFILM have a thermal pad or exposed cathode connection?
No - the SOT23-3L package used for BAR43SFILM has three gull-wing terminals: Pin 1 (Anode), Pin 2 (Cathode), and Pin 3 (No Connection). Pin 3 is internally unconnected and must remain floating; there is no thermal pad or exposed metal slug for heatsinking.
How does BAR43SFILM differ from BAR42FILM in practical circuit use?
BAR43SFILM delivers lower forward voltage (0.26 V typ. at 2 mA) than BAR42FILM (0.35 V typ. at 10 mA), making it superior for micro-power detection. BAR42 offers higher current capability (IF(AV) = 0.1 A same, but VF rises slower with load), while BAR43 excels in low-current, high-frequency roles due to tighter VF/CJ trade-off.
BAR43SFILM 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):
- 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
BAR43SFILM FAQ
1.How can I place an order for BAR43SFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAR43SFILM 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 BAR43SFILM reliable?
The price and inventory of BAR43SFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAR43SFILM is usually 5 days.
3.What payment methods are accepted for BAR43SFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAR43SFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAR43SFILM?
BAR43SFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAR43SFILM 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 BAR43SFILM?
For technical support, including BAR43SFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAR43SFILM requirements.
6.How does Aetrix verify that BAR43SFILM is sourced from the original manufacturer or authorized distributors?
All BAR43SFILM 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 BAR43SFILM meets industry standards.
7.What is the process for return or replacement of BAR43SFILM?
All BAR43SFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAR43SFILM, 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 BAR43SFILM part is unused and in its original packaging.
Return procedure for BAR43SFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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