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STMicroelectronics BAT41CWFILM
- Part No.:
- BAT41CWFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT41CWFILM.pdf
- Description:
- DIODE ARR SCHOTTKY 100V SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:5,394
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Product details
Overview
BAT41CWFILM from STMicroelectronics is a dual common-cathode Schottky barrier diode in SOT-323 package, rated for 100 V repetitive peak reverse voltage and 200 mA continuous forward current, with typical junction capacitance of 3 pF at 1 V and low leakage (0.1 µA at 25 °C, 50 V). It enables high-speed switching in compact DC-DC converter feedback paths and RF detector circuits.
For engineers reviewing the BAT41CWFILM datasheet, BAT41CWFILM pinout, BAT41CWFILM application, or BAT41CWFILM equivalent, key selection criteria include low capacitance for RF signal integrity, matched dual-diode topology for balanced detection, thermal resistance of 550 °C/W (junction-to-ambient), and common-cathode configuration for synchronous rectifier control in buck converters.
Technical Context
The BAT41CWFILM integrates two independent Schottky diodes sharing a single cathode terminal, enabling symmetrical clamping or dual-path rectification without inter-device parameter mismatch. Its 100 V VRRM supports input stages in industrial 48 V systems and PoE-powered devices.
With negligible reverse recovery time and 3 pF capacitance at 1 MHz, it minimizes ringing and insertion loss in 2.4 GHz ISM-band detector front-ends and ESD-protected I/O interfaces where fast transient response and minimal signal loading are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Withstands up to 100 V reverse bias without breakdown, suitable for 48 V bus protection and telecom line interface circuits. |
| IF | 200 mA - Supports continuous forward conduction in low-power signal routing and sensing paths without thermal derating at ambient ≤75 °C. |
| C (typ) | 3 pF at 1 V, 1 MHz - Enables minimal capacitive loading on high-frequency nodes such as RF envelope detectors and clock signal clamps. |
| VF @ 1 mA | 400–450 mV - Ensures low-voltage drop in precision analog signal conditioning and low-current bias networks. |
| IR @ 50 V, 25 °C | 0.1 µA max - Reduces standby power loss in always-on monitoring circuits and battery-backed sensor interfaces. |
| Tj(max) | 150 °C - Allows operation in sealed industrial enclosures with limited airflow and sustained ambient temperatures up to 125 °C. |
Pinout & Package
SOT-323 package: 3-terminal surface-mount plastic package with gull-wing leads, footprint compatible with JEDEC MO-203-AB, 1.8–2.2 mm length × 1.15–1.35 mm width × 1.8–2.4 mm height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode A) | First diode anode | Independent anode for first Schottky path; connects to input node requiring clamping or rectification. |
| 2 (Cathode) | Shared cathode | Common return node for both diodes; ties to ground or reference rail in dual-path configurations. |
| 3 (Anode B) | Second diode anode | Independent anode for second Schottky path; enables differential or redundant signal handling. |
Key Features
| Feature | Design Value |
|---|---|
| Common-cathode dual diode | Enables matched-pair operation for balanced RF detection or dual-rail clamping without external component matching. |
| 3 pF junction capacitance | Reduces signal attenuation and phase shift in 2.4 GHz receiver front-ends and high-speed logic level translators. |
| 0.1 µA reverse leakage @ 25 °C | Minimizes quiescent current error in precision op-amp clamp circuits and low-power comparator reference dividers. |
| 150 °C maximum junction temperature | Supports reliable operation in thermally constrained spaces like sealed IoT gateways and motor drive control boards. |
| SOT-323 footprint | Allows high-density placement in space-constrained applications such as wearable medical sensors and miniaturized USB-C PD controllers. |
Applications
| RF Envelope Detection | USB-C Power Delivery Clamp |
|---|---|
|
Use Scenario: Demodulating amplitude-modulated RF signals in 2.4 GHz ISM-band receivers for wireless sensor networks. IC Role / Device Role / Timing Role: Signal rectifier and peak detector in passive RF front-end stage before baseband amplification. Use Value: 3 pF capacitance preserves signal bandwidth while 0.1 µA leakage maintains DC offset stability across temperature. |
Use Scenario: Clamping CC1/CC2 lines in USB-C port controllers to prevent overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Fast-turn-on protection diode limiting voltage excursions to <0.5 V above VREF. Use Value: Sub-1 ns switching and matched dual-anode structure enable symmetrical clamping on differential CC lines. |
| Industrial 48 V Bus Protection | Isolated Feedback Rectification |
|
Use Scenario: Reverse polarity and transient protection on 48 V DC input rails in programmable logic controllers. IC Role / Device Role / Timing Role: Low-loss freewheeling path during MOSFET turn-off in active OR-ing circuits. Use Value: 100 V VRRM withstands load-dump transients; 200 mA IF handles continuous fault current without thermal runaway. |
Use Scenario: Secondary-side rectification in isolated flyback converters for industrial Ethernet switches. IC Role / Device Role / Timing Role: Synchronous rectifier driver interface diode providing gate drive return path. Use Value: Common-cathode configuration simplifies gate drive loop layout and reduces parasitic inductance in high-frequency (<500 kHz) topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54CW | Same SOT-323 package, 30 V VRRM, 200 mA IF, 10 pF C (typ), higher leakage (1 µA @ 25 °C). | Limited to ≤30 V systems; unsuitable for 48 V bus protection but acceptable in 5 V/3.3 V logic clamping. | Select when lower cost is prioritized over high-voltage capability and RF performance. |
| NSR0230P2T5G | SOD-523 package, 30 V VRRM, 200 mA IF, 12 pF C (typ), 0.5 µA IR @ 25 °C. | Smaller footprint but higher capacitance degrades >1 GHz signal fidelity; not pin-compatible due to 2-pin SOD-523 format. | Choose only for ultra-compact 3.3 V I/O protection where board area is more critical than RF bandwidth. |
Compared with SBAT54CW and NSR0230P2T5G, BAT41CWFILM uniquely delivers 100 V rating, 3 pF capacitance, and true common-cathode dual-diode integration in SOT-323-making it the only option among the three for 48 V industrial clamping and sub-3 GHz RF detection.
Availability
BAT41CWFILM is available at Aetrix Electronics and suitable for RF envelope detection, USB-C power delivery clamp circuits, and industrial 48 V bus protection requiring stable component supply and long-term lifecycle support.
Supply support for BAT41CWFILM 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The BAT41 series belongs to ST's low-capacitance Schottky diode product line, engineered specifically for high-frequency signal integrity and fast-switching efficiency in space-constrained power management and RF subsystems.
FAQ
What is the maximum reverse voltage rating for BAT41CWFILM?
The BAT41CWFILM has a repetitive peak reverse voltage (VRRM) rating of 100 V, verified per Table 2 of STMicroelectronics' Doc ID 12633 Rev 2. This allows safe operation in 48 V industrial systems with margin for load-dump transients up to 80 V, provided thermal limits are observed.
Does BAT41CWFILM support high-frequency RF applications?
Yes-its typical junction capacitance of 3 pF at 1 V and 1 MHz (Table 4), combined with negligible reverse recovery time, makes it suitable for RF envelope detection up to 2.4 GHz. Measured capacitance remains below 10 pF across 0–50 V reverse bias (Figure 5), preserving impedance matching in antenna front-ends.
How is the common-cathode configuration implemented in the SOT-323 package?
In BAT41CWFILM, Pin 2 is the shared cathode terminal; Pins 1 and 3 are independent anodes. This is confirmed by ST's ordering information table (Table 11) and top-view configuration diagrams for SOT-323 in Figure 16. The internal die connects both cathodes to a single metal pad bonded to Pin 2.
What is the thermal resistance of BAT41CWFILM under standard PCB conditions?
The junction-to-ambient thermal resistance (Rth(j-a)) is 550 °C/W for SOT-323 packages mounted on epoxy FR4 PCBs with recommended pad layout (Table 3). This value assumes 35 µm copper thickness and applies to continuous DC operation; pulsed conditions reduce effective thermal impedance per Figure 8.
BAT41CWFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io) (per Diode):
- 200mA (DC)
- 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
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAT41CWFILM FAQ
1.How can I place an order for BAT41CWFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT41CWFILM 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 BAT41CWFILM reliable?
The price and inventory of BAT41CWFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT41CWFILM is usually 5 days.
3.What payment methods are accepted for BAT41CWFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT41CWFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT41CWFILM?
BAT41CWFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT41CWFILM 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 BAT41CWFILM?
For technical support, including BAT41CWFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT41CWFILM requirements.
6.How does Aetrix verify that BAT41CWFILM is sourced from the original manufacturer or authorized distributors?
All BAT41CWFILM 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 BAT41CWFILM meets industry standards.
7.What is the process for return or replacement of BAT41CWFILM?
All BAT41CWFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT41CWFILM, 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 BAT41CWFILM part is unused and in its original packaging.
Return procedure for BAT41CWFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT41CWFILM Tags
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