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STMicroelectronics BAT54ZFILM
- Part No.:
- BAT54ZFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
BAT54ZFILM.pdf
- Description:
- DIODE SCHOTTKY 40V 300MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,936
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Product details
Overview
BAT54ZFILM from STMicroelectronics is a single 40 V Schottky barrier diode in SOD-123 package, rated for 300 mA continuous forward current, with 7 pF typical junction capacitance and 5 ns reverse recovery time, used in high-speed clamping and polarity protection circuits in DC-DC converters and USB port protection.
For engineers reviewing the BAT54ZFILM datasheet, BAT54ZFILM pinout, BAT54ZFILM application, or BAT54ZFILM equivalent, this page delivers verified electrical specs, thermal performance data, SOD-123 footprint details, and real-world substitution guidance for low-loss signal path design.
Technical Context
The BAT54ZFILM implements a planar Schottky barrier structure optimized for minimal conduction loss and negligible switching losses. Its low 240 mV forward voltage at 0.1 mA and sub-5 ns trr enable efficient operation in 1–10 MHz switching nodes.
Designed for surface-mount use on epoxy FR4 PCBs, it features ECOPACK®2 compliance and operates across –40 °C to +150 °C junction temperature range, with 500 °C/W junction-to-ambient thermal resistance under recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - supports reverse blocking in 3.3 V/5 V/12 V rail protection without breakdown |
| IF (continuous) | 300 mA - sufficient for USB 2.0 data line ESD clamp or low-power logic-level signal steering |
| C (typ) | 7 pF - enables <10 MHz signal integrity preservation in RF detector or fast-switching feedback paths |
| trr | 5 ns - ensures minimal switching distortion in synchronous rectifier auxiliary paths |
| VF @ 10 mA | 400 mV - reduces forward power loss to <4 mW in always-on bias networks |
| Tj (max) | +150 °C - allows placement near hot ICs in compact power modules without derating |
| Rth(j-a) | 500 °C/W - requires ≥25 mm² copper pour per lead for sustained 300 mA operation at 70 °C ambient |
Pinout & Package
SOD-123 is a two-terminal surface-mount plastic package with gull-wing leads, 2.55–2.85 mm length, 1.4–1.7 mm width, and 3.55–3.75 mm height; designed for reflow soldering at 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to higher-potential node in clamping or OR-ing configurations |
| Cathode (K) | Forward current exit / reverse-blocking terminal | Typically tied to ground or lower-rail reference for unidirectional protection |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 240 mV at 0.1 mA - enables accurate low-current sensing and ultra-low standby leakage |
| Negligible switching losses | Zero minority-carrier storage - eliminates tail current in high-frequency PWM snubbers |
| Extremely fast switching | 5 ns trr - maintains timing fidelity in >10 MHz clock line clamping |
| Low capacitance | 7 pF at 1 V - preserves signal rise/fall times in high-speed data lines (e.g., I²C, SPI) |
| ECOPACK®2 compliance | Lead-free, halogen-free, RoHS-compliant - meets IPC-J-STD-020D moisture sensitivity level 1 |
Applications
| USB Port Polarity Protection | DC-DC Converter Synchronous Rectifier Clamp |
|---|---|
Use Scenario: Preventing damage from reversed USB cable insertion in portable battery-powered devices. IC Role / Device Role / Timing Role: Unidirectional current steering diode placed between VBUS and system input rail. Use Value: 40 V VRRM withstands transient surges; 300 mA rating covers full USB 2.0 charging current; 7 pF avoids signal integrity degradation on D+/D− lines. | Use Scenario: Clamping flyback voltage spikes during MOSFET turn-off in buck converter secondary-side circuits. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode in non-synchronous rectification stage. Use Value: 5 ns trr prevents cross-conduction loss; 400 mV VF at 10 mA reduces idle power dissipation by >60% vs. standard silicon diodes. |
| RF Detector Input Protection | Logic-Level Signal Steering |
Use Scenario: Safeguarding sensitive RF detector inputs against ESD and overvoltage in wireless sensor nodes. IC Role / Device Role / Timing Role: Low-capacitance front-end clamp limiting input swing to ±0.3 V. Use Value: 7 pF C ensures <0.5 dB insertion loss at 2.4 GHz; 1 µA IR at 30 V preserves detector bias accuracy. | Use Scenario: Selecting between two microcontroller GPIO outputs driving a shared peripheral bus. IC Role / Device Role / Timing Role: Anode-coupled OR gate implementing wired-OR logic with minimal propagation delay. Use Value: Sub-5 ns switching enables reliable 10 MHz bus arbitration; 240 mV VF keeps logic-high threshold within TTL-compatible margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS40201LT1G | Same SOD-123 package, 40 V VRRM, but 360 mV VF @ 10 mA (vs. 400 mV) and 10 pF C (vs. 7 pF) | Higher capacitance limits use above 5 MHz; lower VF improves efficiency in high-duty-cycle clamps | Select when lower forward loss outweighs RF bandwidth needs |
| Vishay SD103AWS-TP | SOD-123, 40 V, but 12 pF C and 500 mV VF @ 10 mA; 150 °C Tj max (vs. 150 °C) | Higher VF increases thermal load in space-constrained layouts; larger C degrades high-speed edge fidelity | Acceptable only where cost is primary constraint and speed <1 MHz |
Compared with NSS40201LT1G and SD103AWS-TP, BAT54ZFILM offers the lowest capacitance (7 pF) for RF-sensitive roles and best balance of VF/trr/C for mixed-signal clamping-making it optimal for USB, DC-DC, and detector protection where both speed and low loss matter.
Availability
BAT54ZFILM is available at Aetrix Electronics and suitable for USB port protection, DC-DC converter clamping, and RF detector input safeguarding requiring stable component supply and long-term production continuity.
Supply support for BAT54ZFILM 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 analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.
The BAT54 series belongs to ST's small-signal discrete portfolio, engineered specifically for high-efficiency, high-speed protection and signal routing in space-constrained, thermally demanding applications.
FAQ
What is the maximum reverse voltage the BAT54ZFILM can block reliably?
The BAT54ZFILM has a repetitive peak reverse voltage (VRRM) rating of 40 V, verified per STMicroelectronics' absolute maximum ratings table. It maintains stable reverse leakage (<1 µA at 25 °C, <100 µA at 100 °C) up to this limit, making it suitable for 3.3 V, 5 V, and 12 V rail protection without derating.
Does BAT54ZFILM require heatsinking in typical 300 mA operation?
No external heatsink is required. With Rth(j-a) = 500 °C/W and PD ≈ 120 mW at 300 mA × 400 mV, junction temperature rise is ~60 °C above ambient. Using ST's recommended SOD-123 pad layout (≥25 mm² copper per lead) keeps Tj within the –40 °C to +150 °C operating range at ≤70 °C ambient.
Can BAT54ZFILM be used in place of BAT54FILM (SOT-23)?
No-BAT54ZFILM (SOD-123) and BAT54FILM (SOT-23) share identical electrical specs but differ mechanically: SOD-123 has 2.7 mm × 1.55 mm footprint vs. SOT-23's 2.9 mm × 1.3 mm, with different lead pitch and thermal resistance (500 vs. 500 °C/W). PCB layout and reflow profile must be validated separately.
Is BAT54ZFILM compliant with lead-free assembly standards?
Yes-BAT54ZFILM is ECOPACK®2 certified, meaning it is fully lead-free, halogen-free, and RoHS-compliant. It supports standard Pb-free reflow profiles with peak temperature up to 260 °C, matching IPC/JEDEC J-STD-020D Level 1 requirements for moisture sensitivity.
BAT54ZFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 300mA
- 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
- Capacitance @ Vr, F:
- 10pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -40°C ~ 150°C
BAT54ZFILM FAQ
1.How can I place an order for BAT54ZFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54ZFILM 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 BAT54ZFILM reliable?
The price and inventory of BAT54ZFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54ZFILM is usually 5 days.
3.What payment methods are accepted for BAT54ZFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54ZFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54ZFILM?
BAT54ZFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54ZFILM 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 BAT54ZFILM?
For technical support, including BAT54ZFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54ZFILM requirements.
6.How does Aetrix verify that BAT54ZFILM is sourced from the original manufacturer or authorized distributors?
All BAT54ZFILM 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 BAT54ZFILM meets industry standards.
7.What is the process for return or replacement of BAT54ZFILM?
All BAT54ZFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT54ZFILM, 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 BAT54ZFILM part is unused and in its original packaging.
Return procedure for BAT54ZFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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