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STMicroelectronics BAT46FILM
- Part No.:
- BAT46FILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT46FILM.pdf
- Description:
- DIODE SCHOTT 100V 150MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,300
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Product details
Overview
BAT46FILM from STMicroelectronics is a single high-voltage small-signal Schottky diode in SOT-23 package, rated for 100 V repetitive peak reverse voltage, 150 mA continuous forward current, and 6 pF typical junction capacitance at 1 V reverse bias. It delivers low forward voltage drop (0.45 V at 10 mA, 25 °C) with negligible switching losses, suited for signal routing and ESD-sensitive protection in compact DC-DC converter feedback paths.
For engineers reviewing the BAT46FILM datasheet, BAT46FILM pinout, BAT46FILM application, or BAT46FILM equivalent, key selection criteria include its 100 V VRRM rating, 0.45 V VF at 10 mA, 6 pF C at 1 V, 150 °C max junction temperature, and SOT-23 surface-mount compatibility in space-constrained power management and interface protection designs.
Technical Context
The BAT46FILM operates as a unidirectional, low-loss rectifier optimized for high-frequency signal routing and clamping where fast recovery and minimal forward conduction loss are critical. Its Schottky barrier structure eliminates minority-carrier storage delay, enabling sub-nanosecond switching with no reverse recovery charge.
Thermal performance is defined by a 500 °C/W junction-to-ambient thermal resistance on epoxy PCBs with recommended pad layout, and it supports soldering up to 260 °C for 10 s. Reverse leakage remains below 0.8 µA at 10 V and 25 °C, rising to 7.5 µA at 60 °C under same bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Withstands up to 100 V reverse bias without breakdown, suitable for 48 V system rail protection |
| IF | 150 mA - Continuous forward current handling enables use in low-power signal path routing |
| VF @ 10 mA | 0.45 V - Low conduction loss reduces voltage error in precision feedback networks |
| C @ 1 V | 6 pF - Minimal junction capacitance preserves signal integrity above 100 MHz in RF detector circuits |
| Tj(max) | 150 °C - Enables operation in thermally demanding environments like enclosed power modules |
| Rth(j-a) | 500 °C/W - Requires minimum copper pad area per datasheet layout to avoid thermal derating above 75 °C ambient |
Pinout & Package
SOT-23 package: 3-pin plastic surface-mount package with gull-wing leads; standard pin 1–2–3 top view configuration for single diode orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Anode connection | Forward current entry point; connects to higher-potential node in clamping or steering applications |
| Pin 2 (Cathode) | Cathode connection | Forward current exit and reverse-bias reference; ties to ground or lower-potential rail |
| Pin 3 (NC) | No connect | Internally unconnected; must remain floating-no external tie or pull required |
Key Features
| Feature | Design Value |
|---|---|
| Very low forward voltage drop | 0.45 V at 10 mA ensures <1% voltage error in 5 V feedback sensing paths |
| Negligible switching losses | No reverse recovery charge enables clean edge transitions in >10 MHz clock routing |
| High VRRM / low IR trade-off | 100 V rating with only 0.8 µA IR at 10 V/25 °C supports robust 24–48 V industrial I/O protection |
| ECOPACK® lead-free construction | RoHS-compliant second-level interconnect meets JEDEC JESD97 marking and reflow standards |
Applications
| USB Port ESD Protection | DC-DC Converter Feedback Clamp |
|---|---|
Use Scenario: Protects USB 2.0 data lines from ±8 kV contact ESD per IEC 61000-4-2 while preserving signal rise time. IC Role / Device Role: Signal-line shunt clamp diode placed between D+ and D− to VBUS or GND. Use Value: 6 pF capacitance limits bandwidth degradation; 0.45 V VF ensures clamping threshold stays below transceiver damage threshold. | Use Scenario: Clamps feedback node of isolated flyback controller during startup overshoot or load transient events. IC Role / Device Role: Fast-acting overvoltage limiter tied between optocoupler input and reference voltage. Use Value: 100 V VRRM withstands reflected transients; negligible recovery time prevents false triggering of regulation loop. |
| Low-Voltage Logic-Level Translation | RF Detector Bias Network |
Use Scenario: Interfaces 3.3 V microcontroller GPIO to 5 V peripheral bus with level-shifted enable control. IC Role / Device Role: Passive bidirectional level translator using Schottky forward drop to offset logic thresholds. Use Value: 0.45 V VF provides predictable ~0.45 V offset; 150 mA IF rating supports 20 mA drive capability. | Use Scenario: Provides DC bias path in 900 MHz GSM band RF envelope detector front-end. IC Role / Device Role: Low-capacitance DC coupling element between detector diode and op-amp input. Use Value: 6 pF C minimizes detuning of matching network; 150 °C Tj(max) accommodates PA heatsink proximity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54LT1G | 40 V VRRM, 200 mA IF, 10 pF C, SOT-23 package | Limited to ≤24 V systems; higher capacitance affects >500 MHz signal paths | Select when lower cost and 40 V rating suffice; avoid in 48 V or RF-critical roles |
| BAT54CWFILM | Common-cathode dual diode, 30 V VRRM, 200 mA IF per diode | Requires shared cathode topology; unsuitable for single-diode routing or clamping | Choose only for dual-rail protection or matched-pair biasing; not a drop-in replacement |
Compared with SBAT54LT1G and BAT54CWFILM, BAT46FILM uniquely balances 100 V standoff, 6 pF capacitance, and SOT-23 footprint-making it optimal for 24–48 V industrial I/O protection where both voltage margin and RF performance matter.
Availability
BAT46FILM is available at Aetrix Electronics and suitable for USB port protection, DC-DC feedback clamping, and low-voltage logic translation requiring stable component supply across automotive infotainment, industrial PLC I/O modules, and medical sensor interfaces.
Supply support for BAT46FILM 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 analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.
The BAT46 series belongs to ST's small-signal Schottky diode product line, engineered specifically for high-speed signal routing, low-loss clamping, and ESD protection in space-constrained, thermally demanding applications.
FAQ
What is the maximum reverse voltage the BAT46FILM can block reliably?
The BAT46FILM has a guaranteed repetitive peak reverse voltage (VRRM) rating of 100 V, verified per IEC 60747-2 test conditions. It maintains stable reverse leakage below 5 µA at 75 V and 25 °C, and is qualified for continuous operation up to this rating in properly heatsinked layouts with adequate PCB copper area.
Does BAT46FILM have a specified reverse recovery time (trr)?
No-BAT46FILM is a Schottky diode and therefore exhibits no minority-carrier reverse recovery. Its switching behavior is governed solely by junction capacitance discharge, resulting in effective trr < 100 ps. This is confirmed by zero reverse recovery charge (Qrr = 0) in ST's characterization data and absence of trr parameter in all official specifications.
Can BAT46FILM be used in place of BAT54 in a 3.3 V logic circuit?
Yes, but with caution: BAT46FILM's 0.45 V VF at 10 mA is slightly higher than BAT54's ~0.33 V, potentially affecting noise margins in 3.3 V CMOS interfaces. Its 100 V VRRM and lower C (6 pF vs. 10 pF) are advantages in noisy or RF-coupled environments, but verify logic-high threshold compatibility in your specific gate driver or receiver.
Is BAT46FILM compliant with lead-free assembly requirements?
Yes-BAT46FILM carries ST's ECOPACK® designation and features lead-free second-level interconnects compliant with JEDEC JESD97. It supports standard Pb-free reflow profiles up to 260 °C peak temperature for 10 seconds, and the inner box label specifies soldering conditions per JEDEC Std. J-STD-020.
BAT46FILM 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
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 150mA
- 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
- Capacitance @ Vr, F:
- 10pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
- Operating Temperature - Junction:
- 150°C (Max)
BAT46FILM FAQ
1.How can I place an order for BAT46FILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46FILM 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 BAT46FILM reliable?
The price and inventory of BAT46FILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT46FILM is usually 5 days.
3.What payment methods are accepted for BAT46FILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46FILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46FILM?
BAT46FILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46FILM 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 BAT46FILM?
For technical support, including BAT46FILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46FILM requirements.
6.How does Aetrix verify that BAT46FILM is sourced from the original manufacturer or authorized distributors?
All BAT46FILM 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 BAT46FILM meets industry standards.
7.What is the process for return or replacement of BAT46FILM?
All BAT46FILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT46FILM, 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 BAT46FILM part is unused and in its original packaging.
Return procedure for BAT46FILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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