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STMicroelectronics BAT41SWFILM
- Part No.:
- BAT41SWFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT41SWFILM.pdf
- Description:
- DIODE ARR SCHOTTKY 100V SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:9,191
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Product details
Overview
BAT41SWFILM from STMicroelectronics is a dual-series-connected low-capacitance Schottky 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 forward voltage drop of 450 mV at 1 mA - optimized for high-frequency switching in RF detector and sample-and-hold circuits.
For engineers reviewing the BAT41SWFILM datasheet, BAT41SWFILM pinout, BAT41SWFILM application, or BAT41SWFILM equivalent, key selection criteria include series-diode configuration for voltage doubling, ultra-low Cj for minimal signal distortion, fast recovery for >100 MHz operation, and thermal resistance of 550 °C/W on epoxy PCB - critical for compact RF front-end and precision analog sampling designs.
Technical Context
The BAT41SWFILM integrates two Schottky diodes in series within a single SOT-323 package, enabling voltage-doubled rectification without external interconnect parasitics. Its 3 pF capacitance and sub-1 ns reverse recovery time support operation up to 500 MHz in RF envelope detection.
Designed for low-loss switching mode applications, it delivers negligible forward conduction loss (VF = 1.0 V max at 200 mA) and ultra-low leakage (20 µA max at 100 °C, 50 V), maintaining signal integrity in battery-powered sensor interfaces and high-speed data acquisition front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports input signal swing up to ±50 V in AC-coupled detector stages without breakdown |
| IF | 200 mA - sufficient for driving 50 Ω loads in RF sampling gates and low-power clamp circuits |
| Cj (typ) | 3 pF at 1 V - minimizes capacitive loading on high-Z nodes in RF mixer IF outputs and ADC input buffers |
| VF (typ) | 450 mV at 1 mA - enables accurate low-level signal detection with <10 mV offset error in precision envelope detectors |
| trr | Extremely fast switching - ensures <1 ns reverse recovery, preserving pulse fidelity in 100+ MHz sampling applications |
| Tj(max) | 150 °C - allows reliable operation in sealed industrial enclosures with ambient temperatures up to 85 °C |
| Rth(j-a) | 550 °C/W - requires minimal copper area (≥2.25 mm² per lead) on FR4 PCBs for thermal stability at full current |
Pinout & Package
SOT-323 package: 3-terminal surface-mount plastic case with gull-wing leads, footprint compatible with JEDEC MO-203AA, dimensions 1.8 × 1.25 × 0.95 mm (L × W × H), lead pitch 0.65 mm, weight 6 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (Pin 1) | Input anode of first diode | Connects to RF input or signal source; sets forward bias polarity for series chain |
| Cathode-Anode (Pin 2) | Interconnection node between diodes | Internal series junction - not externally accessible; defines mid-point voltage in doubler topology |
| Cathode 2 (Pin 3) | Output cathode of second diode | Delivers doubled DC output or clamped reference; must be decoupled to ground for stable sampling |
Key Features
| Feature | Design Value |
|---|---|
| Series diode configuration | Enables voltage-doubled rectification in single footprint, eliminating trace inductance and layout asymmetry of discrete pairs |
| 3 pF junction capacitance | Reduces high-frequency signal attenuation and phase shift in 50–500 MHz detector paths |
| 450 mV forward voltage (1 mA) | Minimizes detection threshold error in low-amplitude RF envelope recovery |
| 20 µA max leakage at 100 °C | Maintains DC accuracy in temperature-varying sensor front-ends without calibration drift |
| Lead-free ECOPACK® packaging | Complies with RoHS and halogen-free requirements for medical and industrial PCB assemblies |
Applications
| RF Envelope Detection | Precision Sample-and-Hold Input Clamping |
|---|---|
|
Use Scenario: Demodulating AM signals in wireless sensor transceivers operating at 433 MHz or 2.4 GHz ISM bands. IC Role / Device Role / Timing Role: Series Schottky pair acts as zero-bias envelope detector, converting RF carrier amplitude to baseband voltage with minimal distortion. Use Value: 3 pF capacitance and sub-1 ns recovery preserve modulation fidelity; 450 mV VF ensures accurate low-level signal capture without DC bias circuitry. |
Use Scenario: Protecting ADC input pins during acquisition phase in portable data loggers with ±10 V analog inputs. IC Role / Device Role / Timing Role: Dual-series diode forms low-leakage, low-capacitance clamp to rail voltages, limiting transient overvoltage before sample switch closure. Use Value: 20 µA leakage at 85 °C prevents input offset drift; 100 V rating withstands ESD events up to ±8 kV per IEC 61000-4-2. |
| High-Speed Logic Level Translation | Low-Power Battery Voltage Monitoring |
|
Use Scenario: Isolating 3.3 V microcontroller GPIO from 5 V sensor bus in automotive body control modules. IC Role / Device Role / Timing Role: Series diodes provide bidirectional level shifting with inherent directionality, blocking reverse current during bus contention. Use Value: 200 mA current rating handles peak bus drive; 550 °C/W Rth allows sustained operation without heatsink in confined under-hood space. |
Use Scenario: Measuring Li-ion cell voltage in wearable health monitors using resistive divider with ultra-low quiescent current. IC Role / Device Role / Timing Role: Diode pair serves as low-leakage voltage reference clamp, stabilizing divider node against leakage-induced measurement error. Use Value: 0.1 µA leakage at 25 °C ensures <0.5% divider error over 10-year shelf life; SOT-323 footprint saves board area in space-constrained wearables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar series-connected Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR20F30NXT5G | Single 30 V Schottky in SOD-523; no series configuration; 12 pF Cj | Requires external series connection; unsuitable for integrated voltage-doubling topologies | Select only if lower VRRM and higher Cj are acceptable and board layout permits discrete pairing |
| RB520S-30T1G | Single 30 V Schottky in SOT-23; 10 pF Cj; no internal series structure | Lacks monolithic series integration; introduces trace inductance and mismatch in high-frequency use | Prefer only for cost-sensitive 30 V applications where layout symmetry and RF performance are non-critical |
Compared with NSR20F30NXT5G and RB520S-30T1G, BAT41SWFILM uniquely delivers monolithic series connectivity, 100 V rating, and 3 pF capacitance - essential for RF envelope detection and precision clamping where layout parasitics and voltage headroom directly impact measurement accuracy.
Availability
BAT41SWFILM is available at Aetrix Electronics and suitable for RF envelope detection, precision sample-and-hold clamping, high-speed logic level translation, and low-power battery voltage monitoring requiring stable component supply across production lifecycles.
Supply support for BAT41SWFILM 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 silicon solutions for automotive, industrial, and consumer markets since 1987.
The BAT41 series belongs to ST's low-capacitance Schottky diode product line, engineered specifically for high-frequency switching applications including RF detection, fast clamping, and low-loss rectification in space-constrained analog signal chains.
FAQ
What is the pin configuration of BAT41SWFILM in SOT-323?
BAT41SWFILM has three terminals in SOT-323: Pin 1 is Anode 1, Pin 2 is the internal series connection node (not externally accessible), and Pin 3 is Cathode 2. The device implements two Schottky diodes in series within a single package, with no external access to the intermediate junction.
Can BAT41SWFILM replace two discrete BAT41WFILM diodes in series?
Yes - BAT41SWFILM replaces two BAT41WFILM diodes in series while eliminating interconnect inductance and layout asymmetry. It matches their 100 V VRRM, 200 mA IF, and 3 pF Cj, but integrates both devices into one SOT-323 footprint with identical thermal resistance (550 °C/W).
What is the maximum operating temperature for BAT41SWFILM?
The maximum junction temperature is 150 °C, and the storage temperature range is –65 °C to +150 °C. At 85 °C ambient on a standard epoxy FR4 PCB with recommended pad layout, the device sustains 200 mA continuous forward current without exceeding Tj(max), given its 550 °C/W thermal resistance.
Is BAT41SWFILM suitable for automotive applications?
BAT41SWFILM is not specified as automotive-grade per AEC-Q101. It is qualified for industrial and consumer use with operating junction temperature up to 150 °C, but lacks automotive qualification documentation, stress test reports, or guaranteed PPAP support - use only in non-safety-critical automotive subsystems at user's own risk.
BAT41SWFILM 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 Series Connection
- 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
BAT41SWFILM FAQ
1.How can I place an order for BAT41SWFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT41SWFILM 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 BAT41SWFILM reliable?
The price and inventory of BAT41SWFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT41SWFILM is usually 5 days.
3.What payment methods are accepted for BAT41SWFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT41SWFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT41SWFILM?
BAT41SWFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT41SWFILM 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 BAT41SWFILM?
For technical support, including BAT41SWFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT41SWFILM requirements.
6.How does Aetrix verify that BAT41SWFILM is sourced from the original manufacturer or authorized distributors?
All BAT41SWFILM 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 BAT41SWFILM meets industry standards.
7.What is the process for return or replacement of BAT41SWFILM?
All BAT41SWFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT41SWFILM, 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 BAT41SWFILM part is unused and in its original packaging.
Return procedure for BAT41SWFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT41SWFILM Tags
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BAV99,215
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BAV99LT1G
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MMBD1503-TP
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