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STMicroelectronics BAT30CFILM
- Part No.:
- BAT30CFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT30CFILM.pdf
- Description:
- DIODE ARR SCHOT 30V 300MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:2,524
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Product details
Overview
BAT30CFILM from STMicroelectronics is a 30 V, 300 mA common-cathode dual Schottky diode in SOT-23 package, optimized for low-loss switching in DC-DC converters 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 < 0.5 µA reverse leakage at VR = 5 V, enabling high-efficiency, high-frequency operation in space-constrained power rails.
For engineers reviewing the BAT30CFILM datasheet, BAT30CFILM pinout, BAT30CFILM application, or BAT30CFILM equivalent, key selection criteria include its dual common-cathode configuration, thermal resistance of 500 °C/W (SOT-23 on epoxy PCB), fast recovery behavior, and compatibility with 30 V input systems requiring bidirectional current control or redundancy paths.
Technical Context
The BAT30CFILM integrates two independent Schottky barrier diodes sharing a single cathode terminal, enabling parallel or OR-ing configurations without external node tying. Its low VF and negligible QRR support continuous conduction mode (CCM) operation up to several hundred kHz in buck-derived topologies.
Thermal performance is defined by Rth(j-a) = 500 °C/W under standard FR4 layout (2.25 mm² copper per lead), and junction temperature is rated to 150 °C - allowing sustained 300 mA average current in ambient temperatures up to +85 °C with appropriate board thermal design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse voltage; defines safe blocking capability in 24 V nominal systems with transient margin. |
| IF(AV) | 300 mA - Continuous forward current per diode; supports compact 1–2 W power stage designs without forced cooling. |
| VF @ 300 mA | 530 mV typ. - Low conduction loss reduces power dissipation to ~159 mW per diode, minimizing thermal stress. |
| CJ @ VR = 1 V | 14 pF typ. - Enables clean switching edges in >1 MHz applications; limits capacitive loading on gate drivers or signal lines. |
| IR @ VR = 5 V | < 0.5 µA max. - Ensures minimal standby leakage in battery-backed or always-on circuits. |
| Tj(max) | 150 °C - Allows operation in industrial environments with localized heating near power components. |
| Rth(j-a) | 500 °C/W - Requires ≥2.25 mm² copper area per lead on FR4 to sustain full current rating at TA = 85 °C. |
Pinout & Package
SOT-23 package (3-pin, plastic, surface-mount); moisture sensitivity level MSL3; RoHS-compliant and ECOPACK® certified. Dimensions: 2.75–3.04 mm × 1.2–1.6 mm × 0.89–1.4 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input/switching node for first diode path; connects to source or supply rail in OR-ing or clamp configurations. |
| Pin 2 | Cathode (common) | Shared output node; ties both diodes to load, ground, or feedback reference - enables compact dual-path routing. |
| Pin 3 | Anode 2 | Input/switching node for second diode path; supports redundancy, input selection, or differential sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Common-cathode dual configuration | Eliminates need for external cathode tie, reducing parasitic inductance and PCB area in OR-ing and power-path selection circuits. |
| Low VF at high current | 530 mV typ. at 300 mA ensures ≤160 mW conduction loss per diode - critical for thermally constrained portable and IoT power rails. |
| Ultra-low reverse leakage | < 0.5 µA at 5 V reverse bias preserves battery life in always-on backup supplies and low-power sensor nodes. |
| Fast switching with no QRR | Zero reverse recovery charge enables clean turn-off in high-frequency (>500 kHz) synchronous rectifier replacements and snubberless designs. |
| SOT-23 footprint compatibility | Standardized 3-pin layout allows drop-in replacement of single-diode SOT-23 parts when dual functionality is added later in design cycle. |
Applications
| Power Path OR-ing | Reverse Polarity Protection |
|---|---|
|
Use Scenario: Dual-input power system (e.g., USB + battery) where either source may be active, but only one powers the load at a time. IC Role / Device Role / Timing Role: Common-cathode diode pair acts as passive, zero-latency power selector - anodes connect to each source, shared cathode feeds load. Use Value: Prevents backfeed between sources while maintaining < 530 mV dropout, avoiding complexity of active ideal diode controllers. |
Use Scenario: 24 V industrial sensor node powered via unshielded cable prone to accidental reverse connection. IC Role / Device Role / Timing Role: BAT30CFILM placed in series with VCC rail, with Pin 1 (Anode 1) toward connector and Pin 2 (cathode) toward load - blocks reverse current instantly. Use Value: Withstands 30 V reverse bias and leaks < 0.5 µA, eliminating fuse reliance and enabling hot-plug-safe field maintenance. |
| DC-DC Converter Output Clamp | Redundant Signal Line Protection |
|
Use Scenario: Synchronous buck converter where body diode conduction during dead-time causes shoot-through risk or voltage overshoot. IC Role / Device Role / Timing Role: One diode clamps high-side switch node to ground during off-state; second diode provides auxiliary path for inductor freewheeling. Use Value: 14 pF capacitance minimizes EMI impact; 530 mV VF ensures faster clamping than MOSFET body diodes, improving efficiency and stability. |
Use Scenario: RS-485 transceiver with dual-redundant bus lines (A/B and A′/B′) requiring fault isolation between channels. IC Role / Device Role / Timing Role: Each diode protects one differential pair: Anode 1 → A, Cathode → common reference; Anode 2 → A′, same cathode - shares return path. Use Value: Common cathode simplifies grounding scheme and avoids floating references; low VF prevents signal distortion in ±5 V data lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN3026LSD-13 | 30 V, 3.2 A dual N-channel MOSFET with integrated Schottky-like body diodes; requires gate drive. | Active ideal diode implementation - higher efficiency at >1 A but adds control complexity and BOM count. | Select when >500 mA current or dynamic load switching demands lower VF than BAT30CFILM can provide. |
| RB050M-30 | 30 V, 500 mA dual common-cathode Schottky in SOT-23-3; VF = 450 mV @ 500 mA, CJ = 30 pF @ 1 V. | Higher current rating but larger capacitance - less suitable for >1 MHz switching or noise-sensitive analog interfaces. | Select when average current exceeds 300 mA and board layout permits slightly higher EMI filtering overhead. |
Compared with DMN3026LSD-13 and RB050M-30, BAT30CFILM offers the lowest system-level complexity for sub-300 mA OR-ing and protection, combining ultra-low leakage, minimal footprint, and zero-drive operation - ideal for cost- and space-sensitive embedded power management.
Availability
BAT30CFILM is available at Aetrix Electronics and suitable for DC-DC converter output stages, industrial sensor reverse polarity protection, and redundant power path OR-ing requiring stable component supply across extended production lifecycles.
Supply support for BAT30CFILM 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 - especially in compact power management and interface protection circuits.
FAQ
What is the maximum continuous current per diode in BAT30CFILM?
The BAT30CFILM is rated for 300 mA continuous forward current per diode at Tj = 25 °C with recommended PCB layout (2.25 mm² copper per lead). Derating is required above 85 °C ambient; at TA = 85 °C, maximum sustainable current drops to approximately 220 mA per diode based on Rth(j-a) = 500 °C/W and Tj(max) = 150 °C.
Does BAT30CFILM have a documented thermal resistance for SOT-23 on FR4?
Yes - ST specifies Rth(j-a) = 500 °C/W for BAT30CFILM in SOT-23 package mounted on an epoxy PCB (FR4) with recommended pad layout (2.25 mm² copper area per lead, 35 µm thickness). This value is measured under standardized JEDEC conditions and appears in Table 3 of the official datasheet (DocID12564 Rev 4).
Can BAT30CFILM be used in place of a single Schottky diode like BAT30FILM?
Yes, BAT30CFILM can replace BAT30FILM in single-diode applications by connecting Pin 3 (Anode 2) to the same net as Pin 1 (Anode 1) and using only one anode path - though this wastes one diode element. Its SOT-23 footprint and marking (C30) are identical, making it mechanically compatible for last-minute dual-function upgrades without board revision.
Is BAT30CFILM suitable for automotive applications?
No - BAT30CFILM is not qualified for automotive use. ST explicitly states in the datasheet that BAT30 devices are not designed or authorized for automotive, safety-critical, or aerospace applications. It lacks AEC-Q101 qualification, and its specification limits (e.g., Tj(max) = 150 °C) do not meet automotive-grade thermal or reliability requirements.
BAT30CFILM 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 Common Cathode
- 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
BAT30CFILM FAQ
1.How can I place an order for BAT30CFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT30CFILM 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 BAT30CFILM reliable?
The price and inventory of BAT30CFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT30CFILM is usually 5 days.
3.What payment methods are accepted for BAT30CFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT30CFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT30CFILM?
BAT30CFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT30CFILM 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 BAT30CFILM?
For technical support, including BAT30CFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT30CFILM requirements.
6.How does Aetrix verify that BAT30CFILM is sourced from the original manufacturer or authorized distributors?
All BAT30CFILM 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 BAT30CFILM meets industry standards.
7.What is the process for return or replacement of BAT30CFILM?
All BAT30CFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT30CFILM, 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 BAT30CFILM part is unused and in its original packaging.
Return procedure for BAT30CFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT30CFILM Tags
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