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STMicroelectronics BAT30WFILM
- Part No.:
- BAT30WFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT30WFILM.pdf
- Description:
- DIODE SCHOTTKY 30V 300MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,667
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Product details
Overview
BAT30WFILM from STMicroelectronics is a 30 V, 300 mA surface-mount Schottky diode in SOT-323 package with common-cathode configuration, featuring 14 pF typical capacitance at VR = 1 V, 500 mV forward voltage at IF = 100 mA (Tj = 25 °C), and 150 °C maximum junction temperature - optimized for high-frequency switching in DC-DC converters and USB power path protection.
For engineers reviewing the BAT30WFILM datasheet, BAT30WFILM pinout, BAT30WFILM application, or BAT30WFILM equivalent, key selection criteria include low VF for efficiency-sensitive 5 V/3.3 V rail clamping, fast recovery (<1 ns) for MHz-range switching, thermal resistance (550 °C/W on epoxy PCB), and RoHS-compliant ECOPACK®2 packaging for space-constrained portable electronics.
Technical Context
This Schottky diode uses a planar silicon structure with metal-semiconductor barrier to achieve negligible reverse recovery charge and sub-nanosecond switching transitions. Its low forward voltage drop stems from low barrier height and optimized epitaxial layer doping, enabling conduction losses below 150 mW at 300 mA.
The device operates with reverse leakage under 5 µA at VR = 30 V and Tj = 25 °C, and exhibits stable capacitance down to 6 pF at VR = 10 V - critical for RF detector and high-speed signal routing applications where parasitic C must remain predictable across bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - supports input rails up to 28 V DC without breakdown in USB PD or PoE-powered devices. |
| IF (continuous) | 300 mA - sustains steady-state current in low-power load switches and ESD protection paths. |
| VF @ 100 mA | 500 mV max - reduces conduction loss to ≤50 mW per diode in dual-cathode configurations. |
| C @ VR = 1 V | 14 pF typ - limits signal distortion in 10–100 MHz RF sampling circuits and antenna switch decoupling. |
| IR @ VR = 30 V | 5 µA max at 25 °C - ensures minimal standby power drain in always-on battery-backed systems. |
| Rth(j-a) | 550 °C/W - requires minimum 25 mm² copper pour for thermal compliance at full rated current. |
| Tj(max) | 150 °C - enables operation in sealed industrial enclosures with ambient up to 85 °C. |
Pinout & Package
SOT-323 package: 3-pin, common-cathode configuration (Pin 1: Anode A1, Pin 2: Cathode common, Pin 3: Anode A2), 2.0 × 1.25 mm footprint, 0.65 mm lead pitch, 0.2 mm lead length, RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode A1 | Input terminal for first diode leg; connects to source-side of reverse polarity protection or OR-ing circuit. |
| Pin 2 | Cathode (common) | Shared cathode node tied to system ground or regulated output rail; defines reference for both diodes. |
| Pin 3 | Anode A2 | Input terminal for second diode leg; used in dual-input redundancy or differential signal clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 500 mV max at 100 mA enables ≥94% efficiency in 3.3 V buck converter synchronous rectification. |
| Ultra-low capacitance | 14 pF typ at 1 V reverse bias preserves signal integrity in 50 Ω RF front-end matching networks. |
| Fast switching | Negligible reverse recovery time eliminates ringing in >1 MHz PWM-controlled LED drivers. |
| ECOPACK®2 compliance | Lead-free, halogen-free, and RoHS-compliant construction meets IPC-J-STD-020 moisture sensitivity level 1. |
Applications
| USB Power Delivery Protection | Redundant 3.3 V Supply OR-ing |
|---|---|
Use Scenario: Preventing backfeed and reverse-current damage when multiple USB-C ports share a common VBUS rail. IC Role / Device Role / Timing Role: Dual-anode Schottky clamp isolating upstream/downstream VBUS paths with simultaneous conduction control. Use Value: Enables bidirectional 5 V/3 A power routing with <100 mV total forward drop and no shoot-through risk. |
Use Scenario: Selecting between two independent 3.3 V LDO outputs in fault-tolerant microcontroller power domains. IC Role / Device Role / Timing Role: Common-cathode diode pair performing automatic supply switchover with <100 ns transition latency. Use Value: Eliminates need for external MOSFET controllers while maintaining <15 mV output droop during switchover. |
| RF Detector Input Clamping | Low-Power Sensor Signal Conditioning |
Use Scenario: Protecting ADC inputs of sub-GHz wireless sensor nodes from ESD and RF overvoltage transients. IC Role / Device Role / Timing Role: High-speed clamping diode shunting RF energy to ground before it reaches sensitive analog front-end. Use Value: Maintains 10 dB insertion loss below 100 MHz while limiting transient voltage to <3.6 V peak. |
Use Scenario: Level-shifting and overvoltage protection for I²C/SPI lines connecting ultra-low-power environmental sensors to host MCU. IC Role / Device Role / Timing Role: Bidirectional signal line protector with <0.5 pF inter-pin capacitance preserving 400 kHz bus timing margins. Use Value: Allows direct interface to 1.8 V/3.3 V mixed-voltage systems without pull-up resistor recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RB520S-30T1G | Single diode, SOD-523, VF = 370 mV @ 100 mA, C = 15 pF @ 1 V | Lacks dual-anode configuration; unsuitable for OR-ing or dual-rail clamping | Select when only one diode function is needed and board area is constrained to <1.2 mm² |
| NSR0330P2T5G | Single anode-cathode, SOD-723, VF = 450 mV @ 100 mA, IR = 10 µA @ 30 V | Higher leakage degrades battery life in always-on IoT nodes; no common-cathode topology | Prefer for cost-sensitive consumer wearables where leakage <5 µA is non-critical |
Compared with RB520S-30T1G and NSR0330P2T5G, BAT30WFILM uniquely delivers dual-anode functionality in SOT-323 with verified 5 µA max leakage at 30 V - essential for redundant power architectures requiring matched VF and thermal coupling between parallel legs.
Availability
BAT30WFILM is available at Aetrix Electronics and suitable for USB PD protection, redundant power OR-ing, and RF detector clamping requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for BAT30WFILM 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 ICs, sensors, and discrete components for automotive, industrial, and consumer markets.
BAT30WFILM belongs to ST's small-signal Schottky diode product line, engineered specifically for high-efficiency, high-frequency switching in space-limited portable and battery-powered systems.
FAQ
What is the pin configuration of BAT30WFILM?
BAT30WFILM uses a 3-pin SOT-323 package with common-cathode topology: Pin 1 is Anode A1, Pin 2 is the shared Cathode, and Pin 3 is Anode A2. This allows independent control of two forward paths sharing one cathode node, confirmed by ST's Figure 12 and Table 8 marking "C30" for common-cathode configuration.
Does BAT30WFILM support reflow soldering per JEDEC J-STD-020?
Yes - BAT30WFILM is qualified for standard Pb-free reflow with peak temperature up to 260 °C (TL), per Table 2, and carries MSL Level 1 rating due to ECOPACK®2 construction and moisture-resistant epoxy molding compound, eliminating bake requirements before assembly.
How does BAT30WFILM perform at elevated junction temperatures?
At Tj = 85 °C, reverse leakage rises to 50 µA max (Table 4), and VF increases by ~30 mV at 100 mA versus 25 °C. Derating curves in Figure 1 show continuous forward current drops to 220 mA at Tamb = 85 °C on epoxy PCB, requiring thermal pad design per Figure 11 footprint.
Can BAT30WFILM replace BAT54SW in existing designs?
No - BAT54SW is a dual-series Schottky (anode-cathode-anode), whereas BAT30WFILM is dual-common-cathode (anode-cathode-anode with shared cathode). Pinout, electrical behavior, and PCB layout are incompatible; substitution would require schematic and footprint revision.
BAT30WFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 300mA
- Voltage - Forward (Vf) (Max) @ If:
- 530 mV @ 300 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 30 V
- Capacitance @ Vr, F:
- 22pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- 150°C (Max)
BAT30WFILM FAQ
1.How can I place an order for BAT30WFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT30WFILM 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 BAT30WFILM reliable?
The price and inventory of BAT30WFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT30WFILM is usually 5 days.
3.What payment methods are accepted for BAT30WFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT30WFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT30WFILM?
BAT30WFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT30WFILM 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 BAT30WFILM?
For technical support, including BAT30WFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT30WFILM requirements.
6.How does Aetrix verify that BAT30WFILM is sourced from the original manufacturer or authorized distributors?
All BAT30WFILM 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 BAT30WFILM meets industry standards.
7.What is the process for return or replacement of BAT30WFILM?
All BAT30WFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT30WFILM, 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 BAT30WFILM part is unused and in its original packaging.
Return procedure for BAT30WFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT30WFILM Tags
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