My Inquiry
My Account
STMicroelectronics BAR43AFILM
- Part No.:
- BAR43AFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAR43AFILM.pdf
- Description:
- DIODE ARR SCHOT 30V 100MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:11,792
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BAR43AFILM 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 reverse voltage rating, 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 BAR43AFILM datasheet, BAR43AFILM pinout, BAR43AFILM application, or BAR43AFILM equivalent, key selection criteria include forward voltage at low current (2–15 mA), reverse recovery time (<80 ps), junction capacitance (7 pF @ 1 V), thermal resistance (500 °C/W), and SOT23-3L footprint compatibility.
Technical Context
This Schottky diode uses a metal-to-silicon junction to achieve low turn-on voltage and negligible minority-carrier storage, enabling sub-nanosecond switching. Its 7 pF junction capacitance at 1 V reverse bias and 80 ps reverse recovery time support RF detection and high-frequency rectification up to 45 MHz.
The device is rated for 0.1 A average forward current and 0.75 A non-repetitive surge, with thermal design governed by 500 °C/W junction-to-ambient resistance on standard FR4 PCB layout. Maximum junction temperature is limited to 150 °C to prevent thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VF (max) | 0.33 V at IF = 2 mA - enables ultra-low-loss biasing in battery-sensitive signal paths |
| VRRM | 30 V - supports input protection in 3.3 V/5 V logic and USB-powered systems |
| IR (max) | 500 nA at VR = 30 V, Tj = 25 °C - ensures minimal leakage in high-impedance sensing nodes |
| trr | 80 ps - allows use in 45 MHz RF envelope detection without waveform distortion |
| CJ | 7 pF at VR = 1 V, f = 1 MHz - maintains signal integrity in HF coupling and clamp circuits |
| Tj (max) | 150 °C - permits operation in thermally constrained spaces like sealed IoT modules |
| Ptot | 250 mW at Tamb = 25 °C - defines maximum continuous dissipation on standard SMT pad layout |
Pinout & Package
SOT23-3L surface-mount package with gull-wing leads, UL94 V0 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 |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in polarity protection or clamping |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Typically tied to ground or reference rail; carries full reverse voltage when off |
| No Connect (Pin 3) | Unused internal terminal | Internally unconnected; must remain floating per ST specification |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at microamp-level currents | 0.26 V typ. at IF = 2 mA - reduces voltage offset in precision analog front-ends |
| Sub-100 ps trr | 80 ps measured at IF = 10 mA, RL = 100 Ω - enables clean edge detection in digital timing circuits |
| 7 pF junction capacitance | Measured at VR = 1 V, 1 MHz - minimizes loading on 45 MHz RF detector outputs |
| 150 °C max junction temperature | Rated for continuous operation without derating in ambient ≤85 °C with standard PCB copper |
| SOT23-3L footprint | Compatible with automated placement and reflow; matches industry-standard 0.65 mm pitch |
Applications
| USB Port Polarity Protection | RF Signal Detector |
|---|---|
Use Scenario: Prevents damage from reversed VBUS connection in USB Type-A receptacles. IC Role / Device Role / Timing Role: Single Schottky diode placed in series with VBUS line to block reverse current while minimizing insertion loss. Use Value: 0.33 V VF at 2 mA ensures <10 mV drop under nominal 5 V/100 mA load, preserving downstream voltage margin. | Use Scenario: Demodulates AM envelope in 45 MHz IF stage of FM radio receivers. IC Role / Device Role / Timing Role: Passive detector diode converting RF amplitude to baseband DC voltage. Use Value: 7 pF CJ and 80 ps trr preserve modulation fidelity without high-frequency roll-off or phase distortion. |
| Low-Voltage Logic Clamp | Backup Power Switching |
Use Scenario: Clamps I²C bus lines to 3.3 V rail during hot-plug events. IC Role / Device Role / Timing Role: Shunt diode limiting transient overvoltage to safe logic levels. Use Value: 500 nA IR at 25 °C prevents measurable DC loading on high-impedance open-drain bus lines. | Use Scenario: Selects between main battery and backup coin cell in real-time clock circuits. IC Role / Device Role / Timing Role: OR-ing diode ensuring seamless switchover without voltage sag. Use Value: 0.26 V VF typ. at 2 mA keeps backup supply dropout below 50 mV, maintaining RTC accuracy. |
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, different marking (D95 vs DB1); identical electrical specs and thermal performance | No functional difference; used interchangeably in same PCB designs | Select when BAR43AFILM is unavailable but same SOT23-3L assembly is required |
| NSR0230HT1G | Higher IF(AV) = 0.2 A, VF = 0.32 V @ 10 mA, but CJ = 10 pF - larger junction area | Less suitable for 45 MHz RF detection due to higher capacitance; better for 5 V power path OR-ing | Prefer for higher-current power routing; avoid where <8 pF capacitance is critical |
Compared with BAR43FILM, BAR43AFILM offers identical performance with traceability differentiation; versus NSR0230HT1G, it trades higher current capability for lower capacitance and tighter low-current VF control-critical in RF and precision analog roles.
Availability
BAR43AFILM is available at Aetrix Electronics and suitable for USB port protection, RF envelope detection, low-voltage logic clamping, and backup power switching requiring stable component supply across industrial and consumer electronics programs.
Supply support for BAR43AFILM 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 automotive, industrial, and consumer markets.
BAR43AFILM belongs to ST's general-purpose Schottky diode product line, engineered specifically for low-voltage, high-speed signal conditioning and protection in space-constrained portable electronics.
FAQ
What is the pin configuration of BAR43AFILM in SOT23-3L?
BAR43AFILM uses Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = No Connect. This configuration is confirmed in ST's DocID3288 Rev 5 footprint diagram and ordering table. Pin 3 is internally unconnected and must remain unbonded on PCB layout.
Is BAR43AFILM suitable for 45 MHz RF detection?
Yes - its 7 pF junction capacitance at 1 V reverse bias and 80 ps reverse recovery time are explicitly characterized at 45 MHz in ST's datasheet Figure 5 and Table 5. These values ensure minimal signal attenuation and phase shift in AM envelope detectors.
How does BAR43AFILM differ from BAR43FILM?
BAR43AFILM (marking DB1) and BAR43FILM (marking D95) share identical die, electrical specs, thermal ratings, and package. The only difference is traceability marking - both are fully interchangeable in design and manufacturing per ST's ordering table.
What is the maximum continuous forward current for BAR43AFILM?
The maximum continuous forward current is 0.1 A, specified in Table 2 of ST's DocID3288 Rev 5 under IF(AV). Derating is required above 25 °C ambient; at 85 °C, usable current drops to ~65 mA based on Rth(j-a) = 500 °C/W and Tj(max) = 150 °C.
BAR43AFILM 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 Anode
- 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
BAR43AFILM FAQ
1.How can I place an order for BAR43AFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAR43AFILM 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 BAR43AFILM reliable?
The price and inventory of BAR43AFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAR43AFILM is usually 5 days.
3.What payment methods are accepted for BAR43AFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAR43AFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAR43AFILM?
BAR43AFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAR43AFILM 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 BAR43AFILM?
For technical support, including BAR43AFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAR43AFILM requirements.
6.How does Aetrix verify that BAR43AFILM is sourced from the original manufacturer or authorized distributors?
All BAR43AFILM 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 BAR43AFILM meets industry standards.
7.What is the process for return or replacement of BAR43AFILM?
All BAR43AFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAR43AFILM, 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 BAR43AFILM part is unused and in its original packaging.
Return procedure for BAR43AFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAR43AFILM Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
