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Diodes Incorporated BAT54W-7-F
- Part No.:
- BAT54W-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAT54W-7-F.pdf
- Description:
- DIODE SCHOTTKY 30V 200MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:30,660
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Product details
Overview
BAT54W-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT323 package, rated for 30 V peak reverse voltage, 200 mA continuous forward current, and 320 mV max forward voltage at 1 mA. It serves as a freewheeling or blocking diode in DC-DC converters and reverse polarity protection circuits.
For engineers reviewing the BAT54W-7-F datasheet, BAT54W-7-F pinout, BAT54W-7-F application, or BAT54W-7-F equivalent, key selection criteria include low VF (≤320 mV @ 1 mA), fast recovery (tRR ≤ 5.0 ns), ultra-small SOT323 footprint, and 2 µA max IR at 25 V - critical for high-efficiency, space-constrained power management designs.
Technical Context
This Schottky diode uses a platinum-silicide or similar low-barrier metal-semiconductor junction to achieve low forward voltage and fast switching. Its guard-ringed PN structure enhances ESD robustness without compromising speed.
Thermal resistance is 625 °C/W (junction-to-ambient, FR-4 board), and it operates across –65 °C to +125 °C. The device is fully RoHS-compliant, halogen- and antimony-free, with matte tin-plated alloy 42 leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - supports input rails up to 24 V DC-DC stages with margin against transients |
| IF | 200 mA continuous - suitable for low-power auxiliary rails and bias supplies |
| VF max | 320 mV @ 1 mA - minimizes conduction loss in low-current freewheeling paths |
| IR max | 2.0 µA @ 25 V - ensures low leakage in reverse-biased blocking applications |
| tRR | 5.0 ns - enables operation in high-frequency (>1 MHz) switching topologies |
| CT | 10 pF @ 1 V, 1 MHz - limits capacitive loading on fast-switching nodes |
| PD | 200 mW - defines thermal limit on standard FR-4 PCB with recommended pad layout |
Pinout & Package
Package: SOT323 - ultra-compact 3-pin surface-mount plastic package (2.0 × 2.225 mm footprint, 0.9 mm height), optimized for automated placement and reflow soldering on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry | Connected to higher-potential node in forward conduction (e.g., switch node in buck converter) |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to output or ground return; blocks reverse current during off-state |
| Case / Heat Sink (Pin 3) | Non-functional mechanical tab | Electrically isolated; provides mechanical stability but no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage drop | ≤320 mV @ 1 mA reduces power loss in low-current bias and sensing paths |
| Fast switching recovery | 5.0 ns tRR enables use in >1 MHz SMPS without significant switching loss penalty |
| PN junction guard ring | Improves ESD tolerance (HBM ≥ 8 kV typical) and transient immunity in noisy environments |
| Ultra-small SOT323 package | 0.006 g weight and 2.0 × 2.225 mm outline saves board area in portable and wearable electronics |
Applications
| DC-DC Converter Freewheeling | Reverse Polarity Protection |
|---|---|
Use Scenario: Used as the synchronous rectifier or catch diode in non-synchronous buck converters operating at 500 kHz–2 MHz. IC Role / Device Role: Freewheeling diode providing current path during high-side FET off-time. Use Value: Low VF (≤320 mV) directly improves light-load efficiency; fast tRR prevents shoot-through risk in high-frequency designs. | Use Scenario: Placed in series with VIN to block reverse supply connection in battery-powered IoT sensors. IC Role / Device Role: Series-blocking diode preventing damage from accidental negative input. Use Value: 30 V VRRM covers 12–24 V systems; 2 µA IR avoids battery drain in always-on standby modes. |
| SMPS Output Rectification | Signal-Level Clamping |
Use Scenario: Output rectifier in isolated flyback adapters delivering ≤200 mA at 5–12 V. IC Role / Device Role: Secondary-side unidirectional current path converting transformer AC to DC. Use Value: 200 mA IF rating matches low-power adapter specs; SOT323 fits tight secondary-side layouts. | Use Scenario: Clamp diode on UART or I²C lines to protect MCU GPIO from ESD or overvoltage. IC Role / Device Role: Low-capacitance (10 pF) shunt limiter diverting transients to rail. Use Value: 10 pF CT avoids signal integrity degradation; guard ring enhances system-level ESD robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR0530T1G | Higher IF (500 mA), larger SOT23 package, VF = 450 mV @ 100 mA | Better for higher-current outputs; less suitable for space-constrained low-IF roles | Select when >300 mA average current or higher thermal margin required |
| NSR0230HT1G | SOT23-3, VF = 270 mV @ 100 mA, IR = 10 µA @ 25 V | Lower VF at high current, but higher leakage compromises battery-critical blocking | Prefer for high-efficiency mid-current paths where leakage is not dominant |
Compared with MBR0530T1G and NSR0230HT1G, BAT54W-7-F uniquely balances ultra-low leakage (2 µA), compact SOT323 size, and sub-320 mV VF at 1 mA - making it optimal for low-power, space-limited, and battery-sensitive applications where both efficiency and standby integrity matter.
Availability
BAT54W-7-F is available at Aetrix Electronics and suitable for DC-DC converters, reverse polarity protection circuits, and freewheeling diode applications requiring stable component supply and long-term industrial availability.
Supply support for BAT54W-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The BAT54W series belongs to Diodes' general-purpose Schottky diode product line, designed specifically for high-efficiency, low-leakage, and space-constrained power management in consumer, industrial, and computing applications.
FAQ
What is the maximum junction temperature for BAT54W-7-F?
The absolute maximum junction temperature is +125 °C, consistent with its –65 °C to +125 °C operating range. Derating begins above +25 °C ambient per the 625 °C/W RθJA curve; at 70 °C ambient, maximum allowable power dissipation drops to ~120 mW.
Is BAT54W-7-F suitable for automotive applications?
The standard BAT54W-7-F is not AEC-Q200 qualified. For automotive use, Diodes offers the pin- and package-compatible BAT54WQ-7-F variant, which meets AEC-Q200 Grade 1 (–40 °C to +125 °C) and includes additional qualification testing for vibration, thermal cycling, and humidity exposure.
How does the guard ring improve reliability?
The integrated PN junction guard ring suppresses edge breakdown under high electric fields, improving transient voltage immunity and ESD robustness (HBM ≥ 8 kV). It also mitigates leakage increase due to surface contamination or moisture ingress, enhancing long-term stability in humid or dusty environments.
Can BAT54W-7-F replace BAT54C-7-F in a design?
No - BAT54W-7-F is a single anode–cathode diode in SOT323, while BAT54C-7-F is a dual common-cathode configuration in SOT323. Pinout, internal topology, and circuit function differ fundamentally; substitution requires schematic and layout revision to accommodate the different terminal arrangement and conduction paths.
BAT54W-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 25 V
- Capacitance @ Vr, F:
- 10pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- -65°C ~ 125°C
BAT54W-7-F FAQ
1.How can I place an order for BAT54W-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54W-7-F 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 BAT54W-7-F reliable?
The price and inventory of BAT54W-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54W-7-F is usually 5 days.
3.What payment methods are accepted for BAT54W-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54W-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54W-7-F?
BAT54W-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54W-7-F 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 BAT54W-7-F?
For technical support, including BAT54W-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54W-7-F requirements.
6.How does Aetrix verify that BAT54W-7-F is sourced from the original manufacturer or authorized distributors?
All BAT54W-7-F 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 BAT54W-7-F meets industry standards.
7.What is the process for return or replacement of BAT54W-7-F?
All BAT54W-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAT54W-7-F, 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 BAT54W-7-F part is unused and in its original packaging.
Return procedure for BAT54W-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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