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STMicroelectronics BAT46AFILM
- Part No.:
- BAT46AFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT46AFILM.pdf
- Description:
- DIODE ARR SCHOTTKY 100V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,807
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Product details
Overview
BAT46AFILM from STMicroelectronics is a common-anode dual Schottky diode in SOT-23 package, rated for 100 V repetitive peak reverse voltage and 150 mA continuous forward current, with low 0.45 V forward voltage at 10 mA and 6 pF typical junction capacitance at 1 V - used in polarity protection and signal routing circuits in portable power management.
For engineers reviewing the BAT46AFILM datasheet, BAT46AFILM pinout, BAT46AFILM application, or BAT46AFILM equivalent, this page delivers verified electrical specs, thermal behavior, package dimensions, real-world use cases, and validated alternative parts for fast prototyping and BOM optimization.
Technical Context
The BAT46AFILM integrates two Schottky diodes sharing a common anode terminal, enabling bidirectional clamping or dual-path routing in compact DC/DC input stages. Its 100 V VRRM rating supports operation across 24 V industrial rails and 48 V telecom interfaces.
With negligible switching losses and 0.45 V VF at 10 mA, it minimizes conduction loss in low-current bias networks and ESD protection paths. The 6 pF junction capacitance at 1 V reverse bias ensures minimal signal distortion in high-frequency routing up to ~100 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports reverse blocking in 24–48 V systems without breakdown risk |
| IF (continuous) | 150 mA - sufficient for bias, sensing, and low-power signal path applications |
| VF @ 10 mA | 0.45 V typ - reduces forward drop in series protection paths, improving efficiency |
| C @ 1 V | 6 pF typ - enables clean signal routing below 100 MHz without capacitive loading |
| IR @ 10 V | 0.8 µA max at 25 °C - ensures low leakage in battery-backed or high-impedance nodes |
| Tj (max) | 150 °C - allows operation in thermally constrained enclosures and under sustained load |
| Rth(j-a) | 500 °C/W (SOT-23) - defines thermal derating curve on standard FR4 PCBs |
Pinout & Package
SOT-23 package: 3-terminal surface-mount plastic case, JEDEC TO-236AB compliant, 2.75–3.04 mm length, 1.2–1.6 mm width, 2.1–2.75 mm height; RoHS-compliant, ECOPACK® certified, lead-free second-level interconnect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode A) | Common anode connection for both diodes | Shared high-side node enabling dual-cathode clamping or OR-ing configuration |
| 2 (Cathode A) | Cathode of Diode A | Independent output path for first diode; routed to protected rail or signal line |
| 3 (Cathode B) | Cathode of Diode B | Independent output path for second diode; supports dual-rail or redundant routing |
Key Features
| Feature | Design Value |
|---|---|
| Common-anode dual configuration | Enables compact bidirectional clamping or dual-input OR-ing without external wiring |
| Low 0.45 V forward voltage | Reduces power loss and self-heating in 10–100 mA bias and protection paths |
| 6 pF junction capacitance | Preserves signal integrity in <100 MHz analog and digital routing applications |
| 150 °C maximum junction temperature | Supports reliable operation in sealed enclosures and high ambient environments |
| ECOPACK® RoHS-compliant packaging | Meets global environmental compliance requirements for industrial and consumer production |
Applications
| USB Port Polarity Protection | DC/DC Converter Input Clamping |
|---|---|
Use Scenario: Preventing damage from reversed USB cable insertion in portable chargers and peripherals. IC Role / Device Role / Timing Role: Dual Schottky diode acting as back-to-back reverse-polarity guard with shared anode tied to VBUS. Use Value: Eliminates need for discrete MOSFET-based protection while maintaining <100 mV net forward drop per path. |
Use Scenario: Suppressing voltage transients and reverse recovery spikes at the input of buck converters in industrial PLC modules. IC Role / Device Role / Timing Role: Common-anode clamp limiting negative excursions during switch-node ringing. Use Value: 6 pF capacitance avoids resonance with converter input caps; 100 V rating covers surge margins beyond 48 V nominal rails. |
| Signal Line Level Shifting | Redundant Power Rail OR-ing |
Use Scenario: Isolating and shifting logic-level signals between isolated domains in sensor interface boards. IC Role / Device Role / Timing Role: Dual cathode paths used for passive level translation with pull-up biasing on each cathode. Use Value: Low VF ensures <0.5 V offset at 1 mA, preserving noise margin in 3.3 V/5 V mixed-signal systems. |
Use Scenario: Combining outputs from two independent 12 V power supplies in telecom shelf controllers. IC Role / Device Role / Timing Role: Common-anode diode pair performing passive OR-ing with automatic source selection. Use Value: 150 mA rating supports up to 100 mA load per supply; low VF minimizes cross-conduction loss and thermal imbalance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | Single diode, SOD-323, 30 V VRRM, 200 mA IF | Limited to single-path use; lower voltage rating excludes 48 V systems | Choose only when system voltage ≤24 V and dual-diode topology is unnecessary |
| RB520S-30T1G | Common-cathode dual, SOT-23, 30 V VRRM, 200 mA IF | Opposite polarity configuration - requires redesign of anode/cathode routing | Select if existing layout uses common-cathode reference and voltage stress stays ≤30 V |
Compared with NSR0230HT1G and RB520S-30T1G, BAT46AFILM uniquely supports 100 V reverse blocking in a common-anode dual configuration - critical for 48 V industrial inputs and polarity-agnostic protection where shared anode simplifies PCB routing and reduces component count.
Availability
BAT46AFILM is available at Aetrix Electronics and suitable for USB port protection, DC/DC input clamping, signal-level translation, and redundant power OR-ing requiring stable component supply and full traceability.
Supply support for BAT46AFILM 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 BAT46 Series targets space-constrained, low-loss protection and routing functions in portable, telecom, and industrial equipment - emphasizing high-voltage Schottky performance in miniature surface-mount packages.
FAQ
What is the maximum reverse voltage the BAT46AFILM can block reliably?
The BAT46AFILM has a guaranteed repetitive peak reverse voltage (VRRM) of 100 V, tested per IEC 60747-2. It maintains stable leakage (<5 µA) up to 75 V at 125 °C, making it suitable for 48 V systems with ±20 % tolerance and transient margins. Derating is recommended above 85 °C ambient.
Can BAT46AFILM replace BAT46FILM in a design?
No - BAT46FILM is a single Schottky diode in SOT-23, while BAT46AFILM is a common-anode dual diode. Pin compatibility does not imply functional equivalence: replacing one with the other requires circuit-level changes to accommodate the shared anode and second cathode. Layout and netlist must be updated.
Is BAT46AFILM suitable for high-frequency signal routing?
Yes - its 6 pF junction capacitance at 1 V reverse bias and negligible switching losses support clean routing of signals up to ~100 MHz. Measured C vs. VR curves show capacitance drops to ~3 pF at 10 V, further reducing loading in bias-sensitive RF front-end or clock distribution paths.
Does BAT46AFILM meet lead-free and RoHS requirements?
Yes - BAT46AFILM carries ST's ECOPACK® certification, featuring lead-free second-level interconnect and full compliance with RoHS Directive 2011/65/EU. The inner box label and package marking indicate "RoHS" and "Pb-free", and soldering profiles follow JEDEC J-STD-020D for MSL1 handling.
BAT46AFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Configuration:
- 1 Pair Common Anode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io) (per Diode):
- 150mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 10 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 75 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BAT46AFILM FAQ
1.How can I place an order for BAT46AFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46AFILM 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 BAT46AFILM reliable?
The price and inventory of BAT46AFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT46AFILM is usually 5 days.
3.What payment methods are accepted for BAT46AFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46AFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46AFILM?
BAT46AFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46AFILM 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 BAT46AFILM?
For technical support, including BAT46AFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46AFILM requirements.
6.How does Aetrix verify that BAT46AFILM is sourced from the original manufacturer or authorized distributors?
All BAT46AFILM 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 BAT46AFILM meets industry standards.
7.What is the process for return or replacement of BAT46AFILM?
All BAT46AFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT46AFILM, 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 BAT46AFILM part is unused and in its original packaging.
Return procedure for BAT46AFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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