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STMicroelectronics BAT41KFILM
- Part No.:
- BAT41KFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BAT41KFILM.pdf
- Description:
- DIODE SCHOTTKY 100V 200MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:69,039
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Product details
Overview
BAT41KFILM from STMicroelectronics is a 100 V, 200 mA low-leakage Schottky barrier diode in SOD-523 package, optimized for high-speed switching and reverse polarity protection with 3 pF typical junction capacitance and 450 mV forward voltage at 1 mA. It operates up to 150 °C junction temperature and is used in compact DC/DC converters and USB port protection circuits.
For engineers reviewing the BAT41KFILM datasheet, BAT41KFILM pinout, BAT41KFILM application, or BAT41KFILM equivalent, key selection criteria include its ultra-low leakage (0.1 µA @ 50 V, 25 °C), fast recovery, minimal forward voltage drop, and SOD-523 footprint suitability for space-constrained PCB layouts.
Technical Context
The BAT41KFILM implements a planar Schottky barrier structure enabling negligible reverse recovery time and low IR losses in switching-mode power supplies. Its 3 pF capacitance and 0.1 µA leakage at 50 V support high-frequency clamping and signal integrity in 5 V–12 V rail protection.
Designed for surface-mount assembly on fine-pitch boards, it leverages SOD-523 mechanical dimensions (0.7 mm × 0.3 mm × 0.25 mm) and ECOPACK2 compliance for lead-free reflow compatibility and environmental adherence without performance trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports input rails up to 80 V DC with margin for transient spikes in industrial and automotive auxiliary supplies |
| IF | 200 mA continuous - sufficient for low-power logic supply rail clamping and sensor interface protection |
| Cj | 3 pF typ. @ 1 V - enables >300 MHz small-signal switching without capacitive loading distortion |
| VF | 450 mV @ 1 mA - minimizes conduction loss in always-on reverse polarity guards for battery-backed systems |
| IR | 0.1 µA @ 50 V, 25 °C - ensures <1 nW standby power dissipation in energy-harvesting and IoT node applications |
| Tj(max) | 150 °C - allows operation in sealed enclosures or near heat-generating components without derating |
Pinout & Package
SOD-523 is a two-terminal surface-mount package with cathode band marking; total footprint measures 0.7 mm × 0.3 mm with 0.25 mm height and 0.25 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to positive supply or signal source during normal conduction; low-resistance path enables efficient charging of downstream caps |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; tied to load ground or protected rail; blocks reverse current above 100 V with sub-µA leakage |
Key Features
| Feature | Design Value |
|---|---|
| Low leakage current | 0.1 µA @ 50 V, 25 °C - reduces standby power in always-connected devices by >95% vs. standard silicon diodes |
| Extremely fast switching | Negligible reverse recovery time - eliminates switching node ringing in 1–5 MHz DC/DC controllers |
| Low capacitance | 3 pF typ. - preserves signal edge rate in high-speed data line clamping (e.g., USB 2.0 D+/D−) |
| ECOPACK2 compliance | Lead-free, RoHS-compliant, halogen-free - meets IPC-J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life |
Applications
| USB Port Protection | DC/DC Converter Snubber |
|---|---|
Use Scenario: Preventing damage from accidental reverse insertion of USB cables into host ports. IC Role / Device Role / Timing Role: Reverse polarity protection diode placed in series with VBUS line. Use Value: 450 mV VF limits voltage drop to <1% of 5 V rail; 0.1 µA IR avoids battery drain in portable hosts. | Use Scenario: Suppressing voltage spikes across synchronous rectifier MOSFETs in buck converters. IC Role / Device Role / Timing Role: Clamp diode across high-side switch to absorb inductive kickback. Use Value: 3 pF Cj prevents parasitic resonance with gate drive traces; 150 °C Tj(max) sustains reliability under thermal cycling. |
| IoT Sensor Node Rail Guard | Industrial PLC Input Conditioning |
Use Scenario: Protecting 3.3 V microcontroller I/O pins from ESD and overvoltage events in wireless sensor nodes. IC Role / Device Role / Timing Role: Low-capacitance clamping diode between signal line and VDD. Use Value: 3 pF capacitance avoids signal degradation on 1 Mbps UART lines; SOD-523 footprint saves >60% board area vs. SOD-123. | Use Scenario: Isolating 24 V digital inputs from field wiring transients in programmable logic controllers. IC Role / Device Role / Timing Role: Reverse-biased voltage clamp shunting surge energy to common rail. Use Value: 100 V VRRM withstands 1 kV/µs fast transients per IEC 61000-4-4; 200 mA IF handles sustained fault currents without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT41KFILM | Same die, identical electrical specs; differs only in tape-and-reel packaging labeling ('S' prefix) | No functional difference; same use cases and layout | Select when sourcing from ST distribution channels requiring 'S'-prefixed order codes |
| NSR0230HT1G | 30 V VRRM, 200 mA IF, 12 pF Cj, 0.35 V VF @ 1 mA - lower voltage rating, higher capacitance, lower VF | Not suitable for 12 V+ clamping; better for 3.3 V logic-level protection where ultra-low VF dominates | Choose only for sub-30 V rails where lower forward drop outweighs reduced surge margin and higher capacitance |
Compared with SBAT41KFILM, BAT41KFILM offers identical performance with standard ordering code; versus NSR0230HT1G, it trades 0.1 V lower VF for 70 V higher VRRM and one-quarter the junction capacitance-critical for 24 V industrial signal conditioning.
Availability
BAT41KFILM is available at Aetrix Electronics and suitable for USB port protection, DC/DC snubbing, and industrial PLC input conditioning requiring stable component supply across production lifecycles.
Supply support for BAT41KFILM 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, delivering innovative analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.
The BAT41 series belongs to ST's low-voltage Schottky diode product line, engineered specifically for high-efficiency, space-constrained power management and signal integrity applications in portable and industrial electronics.
FAQ
What is the maximum reverse voltage the BAT41KFILM can block reliably?
The BAT41KFILM has a repetitive peak reverse voltage (VRRM) rating of 100 V, verified per IEC 60747-2. It maintains <0.1 µA leakage at 50 V and remains within safe operating area up to 100 V at Tj ≤ 150 °C, making it suitable for 24 V and 48 V industrial bus protection with margin.
Does BAT41KFILM require derating at elevated ambient temperatures?
Yes-its continuous forward current drops linearly from 200 mA at 25 °C to ~120 mA at 85 °C ambient, based on thermal resistance Rth(j-a) = 600 °C/W for SOD-523. Derating follows Figure 2 in DS4884; no forced airflow is assumed in the curve.
Is BAT41KFILM compatible with lead-free reflow soldering profiles?
Yes-BAT41KFILM is ECOPACK2-compliant and qualified for standard JEDEC J-STD-020 Level 1 reflow, supporting peak temperatures up to 260 °C for ≤ 30 seconds. Its SOD-523 package withstands thermal shock without delamination or parametric shift.
Can BAT41KFILM be used as a replacement for BAT54S in dual-diode configurations?
No-BAT41KFILM is a single-anode/single-cathode device in SOD-523, whereas BAT54S is a dual-series Schottky in SOT-23. They differ in pin count, package size, and internal configuration; no direct substitution is electrically or mechanically viable without PCB redesign.
BAT41KFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 nA @ 50 V
- Capacitance @ Vr, F:
- 10pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C (Max)
BAT41KFILM FAQ
1.How can I place an order for BAT41KFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT41KFILM 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 BAT41KFILM reliable?
The price and inventory of BAT41KFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT41KFILM is usually 5 days.
3.What payment methods are accepted for BAT41KFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT41KFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT41KFILM?
BAT41KFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT41KFILM 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 BAT41KFILM?
For technical support, including BAT41KFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT41KFILM requirements.
6.How does Aetrix verify that BAT41KFILM is sourced from the original manufacturer or authorized distributors?
All BAT41KFILM 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 BAT41KFILM meets industry standards.
7.What is the process for return or replacement of BAT41KFILM?
All BAT41KFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT41KFILM, 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 BAT41KFILM part is unused and in its original packaging.
Return procedure for BAT41KFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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