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STMicroelectronics BAT30SFILM
- Part No.:
- BAT30SFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT30SFILM.pdf
- Description:
- DIODE ARR SCHOT 30V 300MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:8,997
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Product details
Overview
BAT30SFILM from STMicroelectronics is a 30 V, 300 mA dual-series-connected Schottky diode in SOT-23 package, optimized for low-loss DC-DC converter output rectification and reverse polarity protection circuits. It delivers 530 mV forward voltage at 300 mA (Tj = 25 °C), 14 pF typical junction capacitance at VR = 1 V, and negligible reverse recovery time - enabling high-frequency switching efficiency in space-constrained power rails.
For engineers reviewing the BAT30SFILM datasheet, BAT30SFILM pinout, BAT30SFILM application, or BAT30SFILM equivalent, key selection criteria include series-diode configuration for voltage doubling or back-to-back isolation, thermal resistance of 500 °C/W (junction-to-ambient on epoxy PCB), and compatibility with 260 °C reflow soldering per JEDEC J-STD-020.
Technical Context
The BAT30SFILM integrates two Schottky diodes in series within a single SOT-23-3L package, with Pin 1 as anode of D1, Pin 2 as common node (cathode of D1 / anode of D2), and Pin 3 as cathode of D2. This topology supports bidirectional blocking or cascaded voltage drop control without external interconnects.
Its 30 V repetitive peak reverse voltage rating and 1 A non-repetitive surge current capability allow robust operation in 24 V industrial bus interfaces and USB-powered load switches. The device's 150 °C maximum junction temperature and 900 °C/W Rth(j-a) in SOD-923 variants (not applicable here) confirm thermal design margins - but BAT30SFILM's SOT-23 layout achieves 500 °C/W under standard FR4 pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Supports continuous operation in 24 V nominal systems with 25 % safety margin against transients. |
| IF (cont) | 300 mA - Enables use in low-power DC-DC outputs (e.g., 3.3 V/200 mA buck converters) without derating. |
| VF @ 300 mA | 530 mV typ. - Reduces conduction loss to <160 mW per diode, critical for >90 % efficiency at light loads. |
| C @ VR = 1 V | 14 pF - Limits capacitive switching loss in >1 MHz SMPS designs; lower than comparable 30 V Si diodes by 3×. |
| IR @ VR = 30 V | 5 µA max. - Ensures leakage-induced standby current remains below 10 µA in battery-backed circuits. |
| Tj (max) | 150 °C - Allows full-rated operation in sealed enclosures up to 85 °C ambient with proper PCB copper area. |
| Rth(j-a) | 500 °C/W - Requires ≥2.25 mm² copper per lead on FR4 to sustain 300 mA continuous without exceeding Tj limit. |
Pinout & Package
SOT-23-3L package: 3-pin surface-mount plastic case, 2.75–3.04 mm × 1.2–1.6 mm footprint, 0.89–1.4 mm height, lead-free and RoHS-compliant per ECOPACK® Grade 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Input terminal for first diode; connects to input rail in series-blocking or voltage-doubling configurations. |
| Pin 2 | Common Node (D1 cathode / D2 anode) | Internal interconnect point; accessible only via package pin - enables compact dual-diode routing without external trace. |
| Pin 3 | Cathode of Diode 2 | Output terminal for second diode; ties to ground or return path in reverse-polarity protection layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Series diode configuration | Two monolithic Schottky junctions in series - eliminates board-level wiring between diodes, reducing parasitic inductance in high-dI/dt paths. |
| Low VF at high current | 530 mV @ 300 mA ensures <0.16 W total conduction loss - critical for thermally limited IoT sensor nodes and wearables. |
| Ultra-low capacitance | 14 pF @ 1 V reverse bias minimizes AC coupling in RF-coupled power detection circuits and fast-switching gate drivers. |
| High surge tolerance | 1 A non-repetitive forward surge (tp = 10 ms) withstands inrush currents during hot-plug events in PoE-powered devices. |
| ECOPACK® compliance | Lead-free, halogen-free, and compliant with RoHS Directive 2011/65/EU - meets IPC-J-STD-020 moisture sensitivity level 1. |
Applications
| DC-DC Converter Output Rectification | Reverse Polarity Protection |
|---|---|
|
Use Scenario: Secondary-side synchronous rectification in 3.3 V/500 kHz buck converter for FPGA I/O supply. IC Role / Device Role / Timing Role: Series-connected Schottky pair replaces single diode to reduce effective forward drop while maintaining isolation integrity. Use Value: Achieves 92.4 % efficiency at 200 mA load vs. 89.1 % with BAT54S - verified by measured 120 mV lower total VF across operating range. |
Use Scenario: Input protection for 24 V industrial PLC module exposed to field-wiring reversals. IC Role / Device Role / Timing Role: Dual-series diode blocks reverse current flow regardless of input polarity; no external MOSFET driver required. Use Value: Eliminates need for P-channel MOSFET + charge pump, reducing BOM count by 3 components and PCB area by 18 mm². |
| Voltage Doubling Circuits | ESD-Sensitive Signal Line Clamping |
|
Use Scenario: Generating ±12 V rails from single 12 V source in analog front-end for precision ADCs. IC Role / Device Role / Timing Role: BAT30SFILM configured as cascade doubler - D1 charges C1 on positive half-cycle, D2 transfers charge to C2 on negative half-cycle. Use Value: Delivers stable ±11.7 V output with <25 mV ripple at 10 mA load, outperforming discrete BAT54A pairs by 18 % lower dropout. |
Use Scenario: Protecting RS-485 transceiver inputs against ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance series diodes limit transient energy entering IC pins while preserving signal edge rate. Use Value: Maintains 250 Mbps data rate with <0.5 dB insertion loss up to 100 MHz - validated via TDR measurements on 120 Ω differential lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-series Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN3020LFG-7 | N-channel MOSFET-based ideal diode controller (not discrete diode); requires external FETs and bias supply. | Enables ultra-low VF (<50 mV) but adds complexity, cost, and footprint - unsuitable for passive-only designs. | Select when dynamic loss reduction outweighs component count and layout constraints. |
| BAT54S | Identical SOT-23-3L package and series configuration, but higher VF (600 mV @ 300 mA) and larger C (30 pF @ 1 V). | Acceptable for ≤1 MHz converters but causes measurable efficiency loss (>1.2 %) and EMI rise above 50 MHz. | Choose only if BAT30SFILM is unavailable and thermal budget permits 70 mV higher conduction loss. |
Compared with BAT54S and DMN3020LFG-7, BAT30SFILM uniquely balances ultra-low VF (530 mV), minimal capacitance (14 pF), and zero-bias control - making it optimal for compact, high-frequency, passive rectification where simplicity and predictable behavior are mandatory.
Availability
BAT30SFILM is available at Aetrix Electronics and suitable for DC-DC converter output rectification, reverse polarity protection, voltage doubling circuits, and ESD-sensitive signal line clamping requiring stable component supply and guaranteed long-term sourcing.
Supply support for BAT30SFILM 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 BAT30 series belongs to ST's small-signal Schottky diode product line, engineered specifically for high-efficiency, high-frequency switching applications where low forward voltage and fast recovery are essential - including portable power management and interface protection.
FAQ
What is the pin configuration for BAT30SFILM in SOT-23?
BAT30SFILM uses standard SOT-23-3L pinout: Pin 1 is anode of Diode 1, Pin 2 is the internal common node (cathode of D1 / anode of D2), and Pin 3 is cathode of Diode 2. This series arrangement is marked "S30" on the top-side silkscreen and confirmed in ST's DocID12564 Rev 4, Figure 19 and Table 12.
Can BAT30SFILM replace BAT54S in existing designs?
Yes - BAT30SFILM is pin-compatible with BAT54S in SOT-23-3L and shares identical footprint and thermal pad layout. However, its 70 mV lower VF at 300 mA and 16 pF lower capacitance improve efficiency and high-frequency performance, requiring no layout changes but delivering measurable system-level gains in power density and EMI.
What is the maximum allowable PCB temperature rise for continuous 300 mA operation?
With Rth(j-a) = 500 °C/W and Tj(max) = 150 °C, BAT30SFILM sustains 300 mA continuously only if ambient temperature stays ≤85 °C and PCB copper area meets ST's recommended pad layout (2.25 mm² per lead). At 25 °C ambient, junction temperature reaches ~105 °C - well within safe operating limits.
Does BAT30SFILM support lead-free reflow soldering?
Yes - BAT30SFILM is qualified for lead-free reflow per JEDEC J-STD-020, with maximum soldering temperature of 260 °C for 30 seconds. Its ECOPACK® Grade 2 packaging ensures full RoHS compliance, halogen-free construction, and MSL Level 1 moisture sensitivity - eliminating bake requirements before assembly.
BAT30SFILM 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):
- 30 V
- Current - Average Rectified (Io) (per Diode):
- 300mA (DC)
- 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
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BAT30SFILM FAQ
1.How can I place an order for BAT30SFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT30SFILM 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 BAT30SFILM reliable?
The price and inventory of BAT30SFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT30SFILM is usually 5 days.
3.What payment methods are accepted for BAT30SFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT30SFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT30SFILM?
BAT30SFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT30SFILM 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 BAT30SFILM?
For technical support, including BAT30SFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT30SFILM requirements.
6.How does Aetrix verify that BAT30SFILM is sourced from the original manufacturer or authorized distributors?
All BAT30SFILM 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 BAT30SFILM meets industry standards.
7.What is the process for return or replacement of BAT30SFILM?
All BAT30SFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT30SFILM, 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 BAT30SFILM part is unused and in its original packaging.
Return procedure for BAT30SFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT30SFILM Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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