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STMicroelectronics BAT46AWFILM
- Part No.:
- BAT46AWFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT46AWFILM.pdf
- Description:
- DIODE ARR SCHOTTKY 100V SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:10,333
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Product details
Overview
BAT46AWFILM from STMicroelectronics is a common-anode dual Schottky diode in SOT-323 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 - used in high-speed polarity protection and signal routing circuits in portable power management.
For engineers reviewing the BAT46AWFILM datasheet, BAT46AWFILM pinout, BAT46AWFILM application, or BAT46AWFILM equivalent, this page delivers verified electrical parameters, thermal resistance (550 °C/W), reverse leakage behavior up to 75 V, low-level VF curve data, and confirmed common-anode configuration for dual-diode level-shifting and OR-ing designs.
Technical Context
The BAT46AWFILM integrates two Schottky diodes sharing a single anode terminal, enabling bidirectional clamping or redundant path selection in compact DC-DC output stages and USB port protection. Its low 0.45 V VF at 10 mA and negligible switching losses stem from platinum-silicide barrier formation, not PN-junction diffusion.
Designed for surface-mount operation on FR4 PCBs with recommended pad layout, it exhibits 550 °C/W junction-to-ambient thermal resistance and supports surge currents up to 1 A (10 ms sinusoidal), with maximum junction temperature limited to 150 °C and storage range spanning −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports input protection in 48 V industrial rails and 24 V automotive auxiliary circuits without breakdown. |
| IF (continuous) | 150 mA - sufficient for biasing, logic-level clamping, and low-power signal routing in sensor interfaces. |
| VF @ 10 mA | 0.45 V - minimizes conduction loss in battery-fed devices, extending runtime in wearables and IoT nodes. |
| C @ 1 V, 1 MHz | 6 pF - enables clean high-frequency signal routing below 500 MHz without capacitive loading distortion. |
| IR @ 75 V, 25 °C | 5 µA - ensures reliable reverse blocking in precision analog front-ends and reference voltage supervision. |
| Rth(j-a) | 550 °C/W - requires minimal copper area (≥1.1 mm² per lead) on standard FR4 to sustain full current at 70 °C ambient. |
| Tj(max) | 150 °C - allows operation in sealed enclosures or near heat-generating ICs without derating at moderate loads. |
Pinout & Package
SOT-323 package: 3-terminal plastic surface-mount case with gull-wing leads, 1.8–2.2 mm length, 1.15–1.35 mm width, 1.8–2.4 mm height, ECOPACK® compliant, lead-free second-level interconnect.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1 & Pin 3) | Shared anode node for both diodes | Enables OR-ing of two independent supply paths or dual-rail clamping into a single output node. |
| Cathode A (Pin 2) | First diode cathode | Connects to primary protected rail (e.g., VBUS); reverse-biased during normal operation. |
| Cathode B (Pin 3) | Second diode cathode | Connects to backup rail (e.g., battery); conducts only when primary fails or drops below threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Common-anode dual configuration | Eliminates need for external wiring between anodes, reducing board space and parasitic inductance in OR-ing applications. |
| Low VF (0.45 V @ 10 mA) | Reduces forward conduction loss by >40% vs. comparable silicon diodes, critical for sub-1 V logic-level translation. |
| 6 pF junction capacitance | Preserves signal integrity in 10–100 MHz clock distribution and RF detector circuits without added compensation. |
| 150 °C max junction temperature | Supports placement near hot components (e.g., PMICs, DC-DC inductors) without thermal shutdown or parameter drift. |
| ECOPACK® compliance | Meets JEDEC JESD97 marking standards for lead-free assembly and RoHS/REACH environmental requirements. |
Applications
| USB Power Path Management | Industrial Sensor Signal Clamping |
|---|---|
|
Use Scenario: Dual-input USB power selector routing VBUS and backup battery to a single system rail while preventing backfeed. IC Role / Device Role / Timing Role: Common-anode Schottky OR-ing diode providing automatic source selection and reverse-current blocking. Use Value: Enables seamless switchover with <100 ns response and <0.5 V dropout, eliminating need for active load switches in cost-sensitive designs. |
Use Scenario: Protecting ADC inputs from ESD transients and overvoltage events in 4–20 mA loop-powered sensors. IC Role / Device Role / Timing Role: Low-capacitance clamp diode shunting fast transients (<10 ns rise) to ground or supply rails. Use Value: Limits input voltage to ±0.7 V with <6 pF loading, preserving bandwidth and avoiding ADC saturation or damage. |
| Portable Device Battery Backup | Low-Power Microcontroller Reset Supervision |
|
Use Scenario: Maintaining RTC and SRAM power during main battery removal or deep discharge in handheld medical instruments. IC Role / Device Role / Timing Role: Bidirectional isolation diode ensuring unidirectional current flow from coin cell to backup domain. Use Value: Delivers <150 mA at 0.45 V drop, minimizing voltage sag and extending usable backup time by >25% vs. silicon alternatives. |
Use Scenario: Monitoring microcontroller supply rail (e.g., 3.3 V) and asserting reset if voltage falls below 2.93 V threshold. IC Role / Device Role / Timing Role: Precision clamping element in resistor-divider + comparator reference circuit. Use Value: Stable 0.45 V VF ensures ±1% reference accuracy across temperature, improving reset threshold repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar common-anode Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | Single-diode SOD-323, 30 V VRRM, 200 mA IF, 0.35 V VF @ 10 mA | Limited to ≤30 V systems; lacks dual-diode topology for OR-ing | Select only for lower-voltage, single-path clamping where space permits discrete placement. |
| RB520S-30T1G | Common-anode SOT-323, 30 V VRRM, 200 mA IF, 0.33 V VF @ 10 mA, 15 pF C | Higher capacitance degrades HF signal integrity; insufficient for 48 V+ protection | Preferable only in ultra-low-VF, low-frequency bias applications where capacitance is non-critical. |
Compared with NSR0230HT1G and RB520S-30T1G, BAT46AWFILM uniquely balances 100 V capability, dual common-anode topology, and 6 pF capacitance - making it the only validated choice for 24–48 V OR-ing and high-fidelity analog clamping in space-constrained layouts.
Availability
BAT46AWFILM is available at Aetrix Electronics and suitable for USB power path management, industrial sensor signal clamping, and portable device battery backup requiring stable component supply, consistent tape-and-reel packaging (3000 pcs/reel), and ECOPACK®-compliant manufacturing.
Supply support for BAT46AWFILM 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 analog, MCU, power, and sensing solutions for industrial, automotive, and consumer markets.
The BAT46 series belongs to ST's small-signal Schottky diode product line, engineered specifically for low-loss, high-speed protection and routing in space-constrained, battery-sensitive applications - emphasizing VF consistency, thermal robustness, and surface-mount reliability.
FAQ
What is the pin configuration of BAT46AWFILM in SOT-323?
BAT46AWFILM uses a 3-pin SOT-323 package with Pin 1 = Anode A, Pin 2 = Cathode A, Pin 3 = Anode B/Cathode B shared node - confirming common-anode topology per ST's ordering scheme ('A' = common anode, 'W' = SOT-323). Top-view marking 'DB6' aligns with official ST documentation.
Can BAT46AWFILM replace BAT46AFILM in SOT-23 footprint designs?
No - BAT46AWFILM (SOT-323) and BAT46AFILM (SOT-23) have incompatible footprints, lead pitch (0.65 mm vs. 0.95 mm), and thermal resistance (550 vs. 500 °C/W). Direct substitution requires PCB redesign; electrical specs are identical but mechanical fit is not guaranteed.
What is the maximum reverse voltage stress BAT46AWFILM can withstand continuously?
BAT46AWFILM is rated for 100 V repetitive peak reverse voltage (VRRM) at Tj = 25 °C. Derating applies above 25 °C: at 125 °C junction temperature, maximum allowable VR drops to ~70 V per ST's IR vs. VR curves and thermal limits.
Does BAT46AWFILM support reflow soldering per JEDEC J-STD-020?
Yes - BAT46AWFILM is qualified for lead-free reflow per JEDEC J-STD-020, with maximum soldering temperature of 260 °C for 10 s, matching ECOPACK® specifications. ST confirms compatibility with standard Pb-free profiles including peak ramp rates and dwell times.
BAT46AWFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-323
BAT46AWFILM FAQ
1.How can I place an order for BAT46AWFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46AWFILM 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 BAT46AWFILM reliable?
The price and inventory of BAT46AWFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT46AWFILM is usually 5 days.
3.What payment methods are accepted for BAT46AWFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46AWFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46AWFILM?
BAT46AWFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46AWFILM 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 BAT46AWFILM?
For technical support, including BAT46AWFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46AWFILM requirements.
6.How does Aetrix verify that BAT46AWFILM is sourced from the original manufacturer or authorized distributors?
All BAT46AWFILM 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 BAT46AWFILM meets industry standards.
7.What is the process for return or replacement of BAT46AWFILM?
All BAT46AWFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT46AWFILM, 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 BAT46AWFILM part is unused and in its original packaging.
Return procedure for BAT46AWFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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