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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

STMicroelectronics BAT54AWFILM

Name: BAT54AWFILM
Brand: STMicroelectronics
SKU: BAT54AWFILM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BAT54AWFILM

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: SC-70, SOT-323

Datasheet:: BAT54AWFILM.pdf

Description:: DIODE ARR SCHOT 40V 300MA SOT323

Quantity:: RFQ Add To RFQ list

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Inventory:25,994

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Product details

Overview

BAT54AWFILM from STMicroelectronics is a single common-anode Schottky diode in SOT-323 package, rated for 40 V repetitive peak reverse voltage, 300 mA continuous forward current, and 7 pF typical junction capacitance at 1 V. It delivers 5 ns reverse recovery time and 400 mV forward voltage at 10 mA, enabling high-speed signal clamping in USB data lines.

For engineers reviewing the BAT54AWFILM datasheet, BAT54AWFILM pinout, BAT54AWFILM application, or BAT54AWFILM equivalent, key selection criteria include common-anode configuration for dual-rail protection, low capacitance for <10 MHz signal integrity, thermal resistance of 550 °C/W (SOT-323), and ECOPACK®2 compliance for RoHS- and REACH-constrained designs.

Technical Context

The BAT54AWFILM integrates two Schottky diodes sharing a common anode terminal, forming a dual-diode structure optimized for bidirectional ESD and overvoltage protection in low-voltage I/O interfaces. Its low 0.4 V forward drop at 10 mA and negligible minority-carrier storage enable operation in fast-switching, low-power domains without reverse recovery delay.

Designed for surface-mount assembly on FR4 PCBs with recommended pad layout, it operates across –40 °C to +150 °C junction temperature and supports reflow soldering up to 260 °C. The device exhibits 1 µA max reverse leakage at 30 V and 25 °C, rising to 100 µA at 100 °C - critical for thermally stable bias networks.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Withstands transient surges up to 40 V in reverse-biased protection paths
I_F	300 mA - Supports sustained DC bias or signal-current paths without thermal runaway
C_j (typ)	7 pF @ 1 V - Minimizes capacitive loading on high-impedance analog or digital signal lines
t_rr	5 ns - Enables clean switching in >20 MHz clock or data routing applications
V_F @ 10 mA	400 mV - Reduces forward conduction loss and self-heating in battery-powered circuits
T_j (max)	+150 °C - Allows operation in under-hood automotive or enclosed industrial enclosures
R_th(j-a)	550 °C/W - Requires minimum 1.15 mm × 1.25 mm copper pad per lead for thermal derating

Pinout & Package

SOT-323 package: 3-pin plastic surface-mount package with gull-wing leads, 1.15–1.35 mm width, 1.8–2.4 mm height, and 0.6–0.7 mm lead pitch. Moisture sensitivity level (MSL) 1, compatible with standard reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Common anode connection	Shared positive terminal for both diodes; connects to supply rail or bias voltage
Cathode A (Pin 2)	First cathode	Connects to protected signal line A (e.g., USB D+)
Cathode B (Pin 3)	Second cathode	Connects to protected signal line B (e.g., USB D−); enables dual-line clamping

Key Features

Feature	Design Value
Common-anode dual-diode topology	Enables symmetrical clamping of differential pairs (e.g., USB, RS-422) with single-component footprint
ECOPACK®2 compliance	Meets EU RoHS Directive 2011/65/EU and REACH SVHC requirements without exemptions
Low 7 pF junction capacitance	Preserves signal rise/fall times in ≤10 MHz digital interfaces without added distortion
5 ns reverse recovery time	Eliminates tail current during polarity reversal, preventing false triggering in fast edge-detection circuits
150 °C maximum junction temperature	Supports operation in sealed enclosures with ambient temperatures up to +85 °C under full load

Applications

USB 2.0 Data Line Protection

LVDS Receiver Input Clamp

Use Scenario: Protecting D+ and D− lines against ±8 kV contact ESD per IEC 61000-4-2 in portable USB peripherals.

IC Role / Device Role / Timing Role: Common-anode Schottky clamp limiting voltage excursions to <0.7 V above V_DD and <0.7 V below GND.

Use Value: Prevents latch-up in USB transceivers while adding <1 pF net parasitic capacitance per line due to matched layout symmetry.

Use Scenario: Clamping transient overvoltage on LVDS inputs of FPGA or serializer ICs in industrial vision systems.

IC Role / Device Role / Timing Role: Dual-cathode path shunting fast transients to common supply rails before they reach sensitive differential receivers.

Use Value: Maintains LVDS common-mode range (±1.2 V) and preserves 350 ps skew budget with sub-0.1 dB insertion loss at 300 MHz.

Smartphone SIM Card Interface

Automotive CAN FD Transceiver Bias Network

Use Scenario: Isolating SIM VCC and I/O pins from hot-swap induced transients during card insertion/removal.

IC Role / Device Role / Timing Role: Bidirectional clamping diode pair referenced to 3 V supply, absorbing ±15 kV air-gap ESD.

Use Value: Achieves <100 ns response time and holds clamp voltage ≤3.6 V, staying within SIM controller absolute maximum ratings.

Use Scenario: Stabilizing bias voltage on CAN FD transceiver standby pins exposed to automotive load-dump pulses.

IC Role / Device Role / Timing Role: Low-leakage (1 µA @ 25 °C) common-anode clamp protecting 5 V bias rail from −30 V to +40 V transients.

Use Value: Prevents transceiver shutdown during ISO 7637-2 Pulse 5a events without requiring external TVS or Zener regulation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-Schottky clamping applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
NSR0230HT1G	Single diode, SOD-323, 30 V V_RRM, 200 mA I_F, 12 pF C_j	Requires two devices for common-anode function; higher capacitance limits >5 MHz use	Select only when lower reverse voltage rating is acceptable and board space allows dual placement
DMN2016LFG-7	Common-anode dual MOSFET (not diode); 20 V V_DS, 1.6 A I_D, no intrinsic body diode conduction	Used for active crowbar, not passive clamping; requires gate drive and adds complexity	Choose only for high-current (>500 mA) overvoltage shutdown where diode conduction is insufficient

Compared with NSR0230HT1G and DMN2016LFG-7, BAT54AWFILM uniquely provides integrated common-anode Schottky clamping in one SOT-323 device with 40 V rating, 7 pF capacitance, and guaranteed 5 ns t_rr - making it optimal for compact, high-fidelity signal-line protection without added components or timing uncertainty.

Availability

BAT54AWFILM is available at Aetrix Electronics and suitable for USB interface protection, LVDS receiver clamping, SIM card hot-swap isolation, and automotive CAN FD bias stabilization requiring stable component supply and long-term manufacturability.

Supply support for BAT54AWFILM 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 management ICs, sensors, and discrete components for industrial, automotive, and consumer markets.

The BAT54 series belongs to ST's small-signal Schottky diode product line, engineered specifically for high-speed, low-loss clamping and signal routing in space-constrained, low-voltage electronic systems.

FAQ

What is the pin configuration of BAT54AWFILM in SOT-323?

The BAT54AWFILM uses a standard SOT-323 outline with Pin 1 as the common anode, Pin 2 as Cathode A, and Pin 3 as Cathode B. This matches JEDEC TO-236AB mechanical dimensions and is verified in ST's DocID5505 Rev 12, Figure 19 and Table 10. No alternate pinouts exist for this marking variant.

Does BAT54AWFILM support lead-free reflow soldering?

Yes - BAT54AWFILM is qualified for lead-free reflow per J-STD-020, with a maximum peak temperature of 260 °C for 30 seconds. Its ECOPACK®2 compliance confirms halogen-free epoxy, RoHS-compliant plating, and full traceability to ST's manufacturing lot records.

How does BAT54AWFILM differ from BAT54WFILM?

BAT54WFILM is the single-diode variant in SOT-323 (one anode, one cathode), whereas BAT54AWFILM integrates two diodes sharing one anode (common-anode). Their markings differ: D73 vs. D74. Electrical specs (V_RRM, I_F, C_j) are identical, but BAT54AWFILM enables dual-line protection without doubling footprint.

Is BAT54AWFILM suitable for 5 V logic-level clamping?

Yes - with a 40 V V_RRM and 400 mV V_F at 10 mA, BAT54AWFILM clamps 5 V signals to ~5.4 V (V_DD + V_F) during overvoltage, remaining well within 5.5 V absolute maximum ratings of most 5 V logic ICs. Reverse leakage stays below 1 µA at 5 V, minimizing standby current impact.

BAT54AWFILM Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: SC-70, SOT-323

Packaging:: Tape & Reel (TR)

Product Status:: Last Time Buy

Diode Configuration:: 1 Pair Common Anode

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

BAT54AWFILM FAQ

1.How can I place an order for BAT54AWFILM through Aetrix?

Please submit a Request for Quotation (RFQ) for BAT54AWFILM 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 BAT54AWFILM reliable?

The price and inventory of BAT54AWFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54AWFILM is usually 5 days.

3.What payment methods are accepted for BAT54AWFILM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54AWFILM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BAT54AWFILM?

BAT54AWFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BAT54AWFILM 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 BAT54AWFILM?

For technical support, including BAT54AWFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54AWFILM requirements.

6.How does Aetrix verify that BAT54AWFILM is sourced from the original manufacturer or authorized distributors?

All BAT54AWFILM 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 BAT54AWFILM meets industry standards.

7.What is the process for return or replacement of BAT54AWFILM?

All BAT54AWFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT54AWFILM, 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 BAT54AWFILM part is unused and in its original packaging.

Return procedure for BAT54AWFILM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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