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STMicroelectronics BAT46SFILM
- Part No.:
- BAT46SFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT46SFILM.pdf
- Description:
- DIODE ARR SCHOTTKY 100V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,173
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Product details
Overview
BAT46SFILM from STMicroelectronics is a dual-series-connected small-signal Schottky diode in SOT-23 package, rated for 100 V repetitive peak reverse voltage and 150 mA continuous forward current, with typical junction capacitance of 6 pF at 1 V and forward voltage drop of 0.45 V at 10 mA. It serves in high-speed polarity protection and signal routing circuits where low conduction loss and negligible switching loss are critical.
For engineers reviewing the BAT46SFILM datasheet, BAT46SFILM pinout, BAT46SFILM application, or BAT46SFILM equivalent, key selection criteria include series-diode configuration for bidirectional clamping, thermal resistance of 500 °C/W (junction-to-ambient on epoxy PCB), and low-leakage performance up to 75 V reverse bias at elevated temperature.
Technical Context
The BAT46SFILM integrates two Schottky diodes in series within a single SOT-23 outline, enabling symmetrical clamping or back-to-back protection without external interconnects. Its low VF (0.45 V typ. @ 10 mA) and negligible stored charge support operation in high-frequency signal path conditioning and ESD-tolerant I/O buffering.
This configuration avoids reverse recovery time limitations inherent in PN junction diodes, while its 150 °C maximum junction temperature and 500 °C/W thermal resistance allow reliable use in compact, thermally constrained PCB layouts with standard FR4 copper pad design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports protection in 48 V industrial bus and 24 V automotive auxiliary lines |
| IF (continuous) | 150 mA - sufficient for low-power sensor interface and logic-level signal routing |
| VF @ 10 mA | 0.45 V - minimizes forward power loss in battery-powered signal paths |
| C @ 1 V | 6 pF - enables use in <100 MHz analog signal routing without significant capacitive loading |
| IR @ 75 V, 25°C | 5 µA - ensures stable leakage-limited clamping in precision analog front-ends |
| Rth(j-a) | 500 °C/W - requires minimum 25 mm² copper pour per lead for sustained 150 mA operation |
| Tj(max) | 150 °C - compatible with reflow profiles up to 260 °C peak soldering temperature |
Pinout & Package
SOT-23 package (3-pin, 2.75–3.04 mm × 1.2–1.6 mm × 2.1–2.75 mm), JEDEC-compliant, ECOPACK® lead-free, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Input node for first diode in series chain; connects to protected signal source |
| Pin 2 | Cathode of Diode 1 / Anode of Diode 2 | Internal series junction; not externally accessible - defines mid-point potential |
| Pin 3 | Cathode of Diode 2 | Output node for second diode; ties to reference rail or clamp destination |
Key Features
| Feature | Design Value |
|---|---|
| Series diode configuration | Enables bidirectional clamping without external wiring or layout asymmetry |
| Low VF (0.45 V @ 10 mA) | Reduces forward conduction loss by >40% vs. comparable PN diodes in low-current sensing paths |
| Negligible switching losses | Eliminates reverse recovery delay, supporting clean edge integrity in 10–50 MHz digital I/O |
| ECOPACK® compliance | Meets RoHS and JEDEC JESD97 marking requirements for lead-free second-level interconnect |
Applications
| USB 2.0 Data Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping transient overvoltage on D+ and D− lines during hot-plug or ESD events. IC Role / Device Role / Timing Role: Series-connected Schottky pair provides symmetric ±VF clamping to VDD and GND rails without DC path. Use Value: 6 pF capacitance avoids signal integrity degradation at 480 Mbps; 0.45 V VF ensures minimal baseline offset under normal operation. | Use Scenario: Protecting analog output of 4–20 mA transmitter from reverse polarity and surge coupling. IC Role / Device Role / Timing Role: Dual-series diode blocks reverse current while allowing forward signal flow through loop-powered circuit. Use Value: 100 V VRRM withstands induced transients on long field wiring; 150 °C Tj(max) supports operation in enclosed enclosures. |
| Automotive LIN Bus Interface | Low-Power IoT Microcontroller I/O |
Use Scenario: Bidirectional voltage limiting on LIN physical layer to prevent damage from load-dump or battery reversal. IC Role / Device Role / Timing Role: Series configuration provides matched forward conduction in both directions for bus arbitration and wake-up pulse integrity. Use Value: 150 mA IF rating covers worst-case LIN short-circuit current; 500 °C/W Rth(j-a) allows direct mounting on control module PCB. | Use Scenario: ESD protection and level-shifting isolation between BLE SoC GPIO and external peripherals. IC Role / Device Role / Timing Role: Acts as passive series limiter to suppress fast-rising ESD pulses before reaching sensitive CMOS input stages. Use Value: 5 µA IR at 75 V ensures no measurable leakage-induced drift in 12-bit ADC reference paths; SOT-23 footprint fits 0.5 mm pitch routing. |
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 |
|---|---|---|---|
| NSR20F30HT1G | Single Schottky diode (not series); 30 V VRRM, 2 A IF, 0.42 V VF @ 1 A | Requires external series pairing; higher current rating but lower voltage capability | Select only if system operates ≤24 V and demands >200 mA forward current |
| DMN2016LFG-7 | Dual common-anode MOSFET-based protector; 20 V rating, active control, 25 mΩ RDS(on) | Active device requiring gate bias; not passive or polarity-agnostic | Choose only when programmable enable/disable and ultra-low forward drop are required |
Compared with NSR20F30HT1G and DMN2016LFG-7, BAT46SFILM uniquely delivers integrated series topology, 100 V standoff, and zero-bias operation - making it optimal for passive, high-voltage, space-constrained clamping where simplicity and reliability outweigh programmability or ultra-low RON.
Availability
BAT46SFILM is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial 4–20 mA transmitter outputs, and automotive LIN bus nodes requiring stable component supply across production lifecycles.
Supply support for BAT46SFILM 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, designing and manufacturing microcontrollers, power devices, sensors, and discrete components for industrial, automotive, and consumer markets.
The BAT46 series belongs to ST's small-signal Schottky diode product line, engineered specifically for high-speed protection and routing in space-constrained, thermally sensitive applications where low VF and low C are mandatory.
FAQ
What is the pin configuration of BAT46SFILM in SOT-23?
BAT46SFILM uses standard SOT-23 pinout: Pin 1 = Anode of Diode 1, Pin 2 = internal connection between Cathode of Diode 1 and Anode of Diode 2 (not accessible), Pin 3 = Cathode of Diode 2. This forms a monolithic series pair with no external tap at the internal node.
Can BAT46SFILM replace a single Schottky diode in a rectifier application?
No - BAT46SFILM is not intended for rectification. Its series configuration doubles forward voltage drop (~0.9 V total) and halves effective current rating versus a single diode. It is designed exclusively for bidirectional clamping, ESD suppression, and signal routing-not unidirectional power conversion.
Is BAT46SFILM suitable for 5 V logic-level I/O protection?
Yes. With 0.45 V VF at 10 mA and 6 pF capacitance, it clamps transients without distorting 5 V digital waveforms up to 50 MHz. Its 100 V VRRM provides ample margin against ESD (±8 kV contact) and inductive kickback in mixed-signal systems.
Does BAT46SFILM have automotive qualification?
No. BAT46SFILM is not specified as AEC-Q101 qualified. While it operates up to 150 °C junction temperature and meets JEDEC reflow standards, ST does not list it for automotive safety-critical or mission-critical applications per their disclaimer in the datasheet.
BAT46SFILM 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 Series Connection
- 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
BAT46SFILM FAQ
1.How can I place an order for BAT46SFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46SFILM 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 BAT46SFILM reliable?
The price and inventory of BAT46SFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT46SFILM is usually 5 days.
3.What payment methods are accepted for BAT46SFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46SFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46SFILM?
BAT46SFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46SFILM 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 BAT46SFILM?
For technical support, including BAT46SFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46SFILM requirements.
6.How does Aetrix verify that BAT46SFILM is sourced from the original manufacturer or authorized distributors?
All BAT46SFILM 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 BAT46SFILM meets industry standards.
7.What is the process for return or replacement of BAT46SFILM?
All BAT46SFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT46SFILM, 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 BAT46SFILM part is unused and in its original packaging.
Return procedure for BAT46SFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT46SFILM Tags
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