My Inquiry
My Account
STMicroelectronics BAT54CWFILMY
- Part No.:
- BAT54CWFILMY
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT54CWFILMY.pdf
- Description:
- DIODE ARR SCHOT 40V 300MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:12,216
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BAT54CWFILMY from STMicroelectronics is a common-cathode dual Schottky diode in SOT-323 package, rated for 40 V repetitive peak reverse voltage and 300 mA continuous forward current, with typical junction capacitance of 7 pF and reverse recovery time of 5 ns - optimized for high-speed clamping and polarity protection in automotive signal paths.
For engineers reviewing the BAT54CWFILMY datasheet, BAT54CWFILMY pinout, BAT54CWFILMY application, or BAT54CWFILMY equivalent, key selection criteria include low forward voltage (≤400 mV @ 10 mA), AEC-Q101 qualification, PPAP capability, and SOT-323 thermal resistance of 550 °C/W on standard epoxy PCB.
Technical Context
This dual-diode configuration shares a common cathode terminal, enabling bidirectional clamping or dual-rail protection without discrete routing. Its Schottky barrier construction eliminates minority-carrier storage, delivering negligible switching losses and sub-5 ns trr under IF = IR = 10 mA conditions.
The device operates across –40 °C to +150 °C junction temperature, with reverse leakage capped at 100 µA at 100 °C and 30 V reverse bias - critical for reliability in engine control units and body electronics exposed to thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - supports 24 V automotive systems with ≥2× safety margin against load-dump transients |
| IF (continuous) | 300 mA - sufficient for ESD protection and signal-level rectification in CAN/LIN bus interfaces |
| C (typ.) | 7 pF @ 1 V, 1 MHz - minimizes signal distortion in >100 MHz data lines like USB 2.0 or FlexRay |
| trr (typ.) | 5 ns - enables clean switching in PWM-controlled LED drivers and DC-DC synchronous rectifier snubbing |
| VF @ 10 mA | 400 mV max - reduces conduction loss and self-heating in always-on sensor bias networks |
| Tj(max) | +150 °C - meets under-hood temperature requirements per AEC-Q101 Grade 1 |
| Rth(j-a) | 550 °C/W - defines maximum power dissipation (≈270 mW) on standard SOT-323 pad layout |
Pinout & Package
SOT-323-3L surface-mount package: 1.7 mm × 1.25 mm footprint, 0.9 mm height, lead-free and RoHS-compliant per ECOPACK®2 specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode A) | First anode terminal | Independent input path for dual-channel clamping or OR-ing |
| 2 (Cathode) | Shared cathode node | Common return point - simplifies PCB routing and reduces ground bounce in multi-signal protection |
| 3 (Anode B) | Second anode terminal | Enables symmetrical bidirectional protection or dual-rail voltage translation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, mechanical shock, and humidity testing |
| Low VF (≤400 mV @ 10 mA) | Reduces forward drop in low-voltage sensor signal conditioning, preserving ADC reference margins |
| 7 pF junction capacitance | Minimizes capacitive loading on high-speed digital I/Os such as microcontroller GPIOs and LIN transceivers |
| 5 ns reverse recovery time | Prevents shoot-through in synchronous buck converters using external Schottky catch diodes |
| PPAP capable | Supports full Production Part Approval Process documentation for Tier-1 automotive suppliers |
Applications
| Automotive LIN Bus Protection | USB 2.0 ESD Clamp |
|---|---|
Use Scenario: Protecting LIN transceiver pins against ISO 16750-2 electrical transients and IEC 61000-4-2 ESD events. IC Role / Device Role / Timing Role: Dual-anode clamping diode referenced to common cathode tied to VCC rail. Use Value: 40 V VRRM withstands 35 V load-dump spikes; 5 ns trr prevents latch-up during fast edge coupling. | Use Scenario: Bidirectional ESD protection on D+ and D− lines of USB 2.0 ports in infotainment head units. IC Role / Device Role / Timing Role: Common-cathode dual Schottky providing low-capacitance (<7 pF) path to VBUS and GND. Use Value: 7 pF capacitance avoids signal integrity degradation at 480 Mbps; AEC-Q101 ensures field longevity. |
| Engine Control Unit Signal Conditioning | Body Control Module Voltage Translation |
Use Scenario: Level-shifting and overvoltage clamping for crankshaft position sensor signals entering MCU inputs. IC Role / Device Role / Timing Role: Dual Schottky used in series-clamp configuration with pull-up resistors to 5 V and 3.3 V rails. Use Value: 300 mA IF rating handles transient surges; 150 °C Tj(max) sustains operation near exhaust manifolds. | Use Scenario: Translating 12 V battery-sensed signals to 5 V logic levels in door module microcontrollers. IC Role / Device Role / Timing Role: Common-cathode pair configured as active-low clamp to 5 V and passive-high clamp to GND. Use Value: Low VF (400 mV) preserves noise margin; SOT-323 footprint enables dense placement near connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS40201MR6T1G | SOT-523 package (smaller footprint), 30 V VRRM, 200 mA IF rating | Limited to lower-power signal lines due to reduced current and voltage ratings | Select when board space is constrained and 30 V/200 mA suffices |
| Vishay VS-3BQ040-M3/5BT | SOD-323 package, same 40 V/300 mA rating, but single-diode configuration requiring two devices | Doubles component count and PCB area; lacks integrated common-cathode convenience | Choose only if sourcing constraints require Vishay-only BOMs |
Compared with BAT54CWFILMY, NSS40201MR6T1G trades voltage/current headroom for miniaturization, while VS-3BQ040-M3/5BT replicates performance at the cost of layout efficiency and assembly complexity.
Availability
BAT54CWFILMY is available at Aetrix Electronics and suitable for automotive LIN bus protection, USB 2.0 ESD clamping, and engine control unit signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BAT54CWFILMY 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.
The BAT54 series belongs to ST's automotive-qualified small-signal Schottky portfolio, engineered specifically for robust signal integrity and thermal resilience in harsh-temperature vehicle subsystems.
FAQ
What is the pin configuration of BAT54CWFILMY in SOT-323?
The BAT54CWFILMY uses a standard SOT-323-3L outline with Pin 1 = Anode A, Pin 2 = Common Cathode, Pin 3 = Anode B - confirmed by ST's Figure 10 and Table 7 mechanical drawings. This arrangement enables direct replacement in existing common-cathode layouts without redesign.
Is BAT54CWFILMY suitable for 12 V automotive power rail protection?
No - BAT54CWFILMY is rated for 40 V VRRM and intended for signal-level clamping, not primary power rail protection. Its 300 mA IF rating and 550 °C/W thermal resistance make it unsuitable for sustained current handling on 12 V distribution lines; use TVS diodes or dedicated load switches instead.
How does BAT54CWFILMY differ from BAT54WFILMY?
BAT54WFILMY is the single-diode variant in the same SOT-323 package, whereas BAT54CWFILMY integrates two Schottky diodes sharing one cathode terminal. The "C" suffix explicitly denotes common-cathode topology, enabling dual-path protection with shared return - reducing component count versus using two BAT54WFILMY devices.
Does BAT54CWFILMY require derating at elevated ambient temperatures?
Yes - its 300 mA IF rating applies at 25 °C ambient; derating is required above 75 °C per Figure 2 in the datasheet. At 125 °C ambient, maximum continuous current drops to ≈120 mA to maintain Tj ≤ 150 °C, assuming standard epoxy PCB layout and no forced airflow.
BAT54CWFILMY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- Q
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BAT54CWFILMY FAQ
1.How can I place an order for BAT54CWFILMY through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54CWFILMY 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 BAT54CWFILMY reliable?
The price and inventory of BAT54CWFILMY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54CWFILMY is usually 5 days.
3.What payment methods are accepted for BAT54CWFILMY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54CWFILMY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54CWFILMY?
BAT54CWFILMY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54CWFILMY 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 BAT54CWFILMY?
For technical support, including BAT54CWFILMY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54CWFILMY requirements.
6.How does Aetrix verify that BAT54CWFILMY is sourced from the original manufacturer or authorized distributors?
All BAT54CWFILMY 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 BAT54CWFILMY meets industry standards.
7.What is the process for return or replacement of BAT54CWFILMY?
All BAT54CWFILMY units undergo pre-shipment inspection (PSI). If there is an issue with BAT54CWFILMY, 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 BAT54CWFILMY part is unused and in its original packaging.
Return procedure for BAT54CWFILMY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54CWFILMY 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
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
