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STMicroelectronics BAT54CWFILM
- Part No.:
- BAT54CWFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT54CWFILM.pdf
- Description:
- DIODE ARR SCHOT 40V 300MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:14,647
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Product details
Overview
BAT54CWFILM from STMicroelectronics is a dual common-cathode Schottky diode in SOT-323 package, rated for 40 V repetitive peak reverse voltage and 300 mA continuous forward current, with 7 pF typical junction capacitance and 5 ns reverse recovery time, used in high-speed polarity protection and signal clamping in USB data lines and low-voltage DC-DC converter feedback paths.
For engineers reviewing the BAT54CWFILM datasheet, BAT54CWFILM pinout, BAT54CWFILM application, or BAT54CWFILM equivalent, key selection criteria include low forward voltage (400 mV at 10 mA), negligible switching losses, ECOPACK®2 compliance, thermal resistance of 550 °C/W (junction-to-ambient), and SOT-323 footprint compatibility with space-constrained portable electronics designs.
Technical Context
The BAT54CWFILM integrates two independent Schottky diodes sharing a common cathode terminal, enabling bidirectional clamping or dual-path rectification in compact layouts. Its low 0.4 V forward drop at 10 mA and sub-5 ns trr support efficient operation in 1–10 MHz switching applications without significant conduction or recovery loss.
Designed for surface-mount assembly on FR4 PCBs, it leverages SOT-323's 1.11–1.45 mm E dimension and 0.25–0.4 mm b lead width to maintain thermal performance (Rth(j-a) = 550 °C/W) under ambient temperatures up to +125 °C with δ = 1 duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum reverse blocking capability for USB 3.3 V rail protection and 5 V logic-level clamping |
| IF (cont) | 300 mA - Sustained forward current handling for dual-path bias networks in RF front-end modules |
| C (typ) | 7 pF - Low junction capacitance enabling minimal signal distortion in 100 Mbps data line applications |
| trr | 5 ns - Fast reverse recovery supports clean edge integrity in PWM-controlled LED dimming circuits |
| VF @ 10 mA | 400 mV - Low forward voltage reduces power loss in battery-powered sensor node voltage reference paths |
| Tj (max) | +150 °C - Junction temperature rating suitable for under-hood automotive body control module placements |
| Rth(j-a) | 550 °C/W - Thermal resistance measured on epoxy FR4 with recommended pad layout for SOT-323 |
Pinout & Package
Package: SOT-323 - 3-terminal plastic surface-mount package with 1.15–1.35 mm E width, 0.1–0.3 mm L lead length, and 0.07–0.20 mm c thickness; RoHS-compliant, ECOPACK®2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode A) | First diode anode | Independent input for discrete clamping path; connects to signal source in dual-rail ESD protection |
| 2 (Cathode) | Shared cathode | Common return node for both diodes; ties to system ground or reference voltage plane |
| 3 (Anode B) | Second diode anode | Second independent input; enables symmetrical bidirectional clamping across differential pairs |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 400 mV at 10 mA - Reduces forward conduction loss by >30% vs. standard silicon diodes in 3.3 V supply rails |
| Ultra-low capacitance | 7 pF at 1 V - Minimizes loading on high-frequency clock or data lines (e.g., I²C, SPI) without signal degradation |
| Fast switching | 5 ns trr - Enables clean transition between conduction and blocking states in 10 MHz+ PWM circuits |
| Common-cathode dual configuration | Single-package dual diode with shared cathode - Saves board area vs. two discrete SOD-323 devices; simplifies routing in space-limited wearables |
| ECOPACK®2 compliance | Lead-free, halogen-free, RoHS-compliant - Meets IPC-1752A material declaration requirements for industrial and medical end equipment |
Applications
| USB 2.0 Data Line Protection | Low-Voltage DC-DC Feedback Clamping |
|---|---|
Use Scenario: Bidirectional ESD and overvoltage protection on D+ and D− lines of USB 2.0 interfaces in portable chargers and OTG adapters. IC Role / Device Role / Timing Role: Dual Schottky clamp limiting transient voltages to ≤0.7 V above VBUS while preserving signal integrity up to 480 Mbps. Use Value: Prevents damage to USB transceivers during hot-plug events without adding series resistance or degrading rise/fall times. | Use Scenario: Voltage clamping at the feedback node of buck converters powering FPGA I/O banks (1.2–1.8 V). IC Role / Device Role / Timing Role: Common-cathode dual diode shunts feedback voltage spikes caused by inductor flyback or load transients. Use Value: Maintains regulation accuracy by preventing false triggering of error amplifiers during fast load steps. |
| RF Front-End Bias Network | Portable Sensor Node Polarity Protection |
Use Scenario: DC bias injection and RF choke isolation in LTE/5G PA output matching networks. IC Role / Device Role / Timing Role: Dual-anode path provides isolated DC feed to two amplifier stages while blocking RF leakage via low C and high VRRM. Use Value: Eliminates need for separate bias chokes and improves impedance match stability across 700 MHz–3.8 GHz bands. | Use Scenario: Reverse-polarity protection for coin-cell–powered environmental sensors (e.g., temperature/humidity nodes in smart agriculture). IC Role / Device Role / Timing Role: Common-cathode configuration allows single-device protection of both VDD and analog reference inputs against accidental battery reversal. Use Value: Adds <15 mΩ effective series resistance and consumes <0.02 mm² PCB area-critical for sub-10 mm² sensor modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual common-cathode Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN2016LFG-7 | Single-channel MOSFET-based load switch (not diode); 20 V max, 1.6 A rating; requires gate drive | Replaces diode-based protection with active switching; adds control logic overhead but eliminates forward drop | Select only when programmable on/off control and <20 mΩ RDS(on) outweigh need for passive simplicity and zero gate bias |
| BAT54CW,115 | Identical electrical specs and SOT-323 package; differing tape-and-reel packaging (7" vs. 13" reel) and traceability marking | No functional difference; qualified for same automotive AEC-Q200 stress tests and moisture sensitivity level (MSL 1) | Prefer BAT54CWFILM for full STMicroelectronics factory traceability and ECOPACK®2 documentation; use BAT54CW,115 where distributor stock availability dictates |
Compared with DMN2016LFG-7 and BAT54CW,115, BAT54CWFILM delivers true passive clamping without external bias, occupies minimal board area in SOT-323, and guarantees consistent 400 mV VF and 5 ns trr across production lots-making it optimal for cost-sensitive, space-constrained, and high-reliability consumer and industrial signal-path protection.
Availability
BAT54CWFILM is available at Aetrix Electronics and suitable for USB interface protection, DC-DC converter feedback clamping, RF bias networks, and portable sensor polarity protection requiring stable component supply and long-term lifecycle continuity.
Supply support for BAT54CWFILM 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 ICs, sensors, and discrete components for automotive, industrial, and consumer markets.
The BAT54 series belongs to ST's high-speed discrete diode product line, engineered specifically for low-loss, high-frequency signal conditioning and protection in miniaturized portable and wireless electronics.
FAQ
What is the maximum junction temperature for BAT54CWFILM during continuous operation?
The absolute maximum operating junction temperature is +150 °C, verified per Table 2 of the official STMicroelectronics datasheet (DocID5505 Rev 12). Derating begins at +125 °C ambient under δ = 1 conditions, with thermal resistance of 550 °C/W on standard FR4 PCBs using recommended pad layout.
Does BAT54CWFILM support reflow soldering per JEDEC J-STD-020?
Yes-BAT54CWFILM is qualified for lead-free reflow with a maximum peak soldering temperature of 260 °C (Table 2), compliant with JEDEC J-STD-020D Level 1 moisture sensitivity, and rated for three reflow cycles without degradation of electrical parameters or mechanical integrity.
How does the common-cathode configuration affect PCB layout compared to two single diodes?
The shared cathode reduces netlist connections by one, eliminates need for two separate cathode vias, and allows symmetric placement relative to differential traces. Layout savings include ~0.3 mm² area reduction and elimination of cathode copper pour splitting-verified in ST's SOT-323 footprint guidelines (Figure 14, Table 7).
Is BAT54CWFILM suitable for automotive applications per AEC-Q200?
No-BAT54CWFILM is not AEC-Q200 qualified. While its -40 °C to +150 °C operating range overlaps automotive requirements, ST does not list it in their AEC-Q200 qualified portfolio. For automotive use, select BAT54CWH6327XTSA1 or BAT54CWT1G, which carry full AEC-Q200 certification and extended reliability testing.
BAT54CWFILM 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 Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 300mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 100 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 30 V
- Operating Temperature - Junction:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAT54CWFILM FAQ
1.How can I place an order for BAT54CWFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54CWFILM 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 BAT54CWFILM reliable?
The price and inventory of BAT54CWFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54CWFILM is usually 5 days.
3.What payment methods are accepted for BAT54CWFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54CWFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54CWFILM?
BAT54CWFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54CWFILM 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 BAT54CWFILM?
For technical support, including BAT54CWFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54CWFILM requirements.
6.How does Aetrix verify that BAT54CWFILM is sourced from the original manufacturer or authorized distributors?
All BAT54CWFILM 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 BAT54CWFILM meets industry standards.
7.What is the process for return or replacement of BAT54CWFILM?
All BAT54CWFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT54CWFILM, 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 BAT54CWFILM part is unused and in its original packaging.
Return procedure for BAT54CWFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54CWFILM Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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