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Diodes Incorporated BAT400D-7-F
- Part No.:
- BAT400D-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT400D-7-F.pdf
- Description:
- DIODE SCHOTTKY 40V 500MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:15,068
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Product details
Overview
BAT400D-7-F from Diodes Incorporated is a 0.5A surface-mount Schottky barrier rectifier in SOT23 package, featuring 40V peak repetitive reverse voltage, 285–550mV forward voltage at 10–500mA, and 1.0–50µA leakage current at 10–30V reverse bias. It delivers low-loss power conversion in space-constrained DC/DC outputs and reverse-polarity protection circuits.
For engineers reviewing the BAT400D-7-F datasheet, BAT400D-7-F pinout, BAT400D-7-F application, or BAT400D-7-F equivalent, key selection criteria include forward voltage drop at load current, thermal resistance (220°C/W), junction temperature range (−40°C to +125°C), and JEDEC-qualified reliability for industrial and automotive-adjacent designs.
Technical Context
This Schottky diode uses a metal-semiconductor junction to achieve fast switching (no minority-carrier storage) and low forward conduction loss. Its 40V VRRM rating supports 24V system rails with margin, while the 3A non-repetitive surge rating handles transient inrush events.
Thermal performance is defined for mounting on a 1-inch², 2-oz copper pad (RθJA = 220°C/W). Capacitance ranges from 125pF at 0V to 20pF at 10V reverse bias, supporting moderate-frequency rectification up to ~10MHz without excessive AC coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Blocks up to 40V reverse voltage without breakdown; suitable for 24V nominal systems with safety margin. |
| IF(AV) | 0.5 A - Continuous DC output current capability; derated to ~0.4A under capacitive loads per spec. |
| VF | 285–550 mV - Low conduction loss at 10–500mA; reduces power dissipation vs. standard PN diodes. |
| IR | 1.0–50 µA - Leakage remains sub-µA at 10V, critical for battery-powered hold-up and sensing paths. |
| RθJA | 220 °C/W - Thermal resistance measured on 1″² 2-oz Cu; requires PCB thermal relief planning for >200mW operation. |
| CT | 20–125 pF - Junction capacitance decreases with reverse bias; enables use in <10MHz switching supplies. |
Pinout & Package
Package: SOT23 - 3-terminal plastic surface-mount package (1.025mm height, 2.90mm length, 1.30mm width), RoHS-compliant, halogen-free, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current entry point under forward bias | Connected to higher-potential side (e.g., input rail); polarity marked by cathode band on package top view. |
| Cathode (Pin 2) | Current exit point under forward bias | Connected to lower-potential side (e.g., output node); terminal marked with band on SOT23 top view diagram. |
| NC / Heat Sink (Pin 3) | Non-connected / thermal pad | No internal connection; serves as mechanical anchor and optional thermal path if soldered to copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | VF = 285mV typ. @ 10mA - Reduces conduction loss in low-voltage, high-efficiency DC/DC outputs. |
| High reliability qualification | JEDEC-compliant, AEC-Q200 capable - Supports industrial and automotive-adjacent applications requiring extended lifetime and thermal cycling robustness. |
| Green molding compound | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - Meets IEC 61249-2-21 and RoHS 3 requirements for eco-sensitive designs. |
| Moisture sensitivity level | MSL Level 1 (per J-STD-020) - No bake required before reflow; simplifies SMT assembly logistics. |
Applications
| USB Power Switching | Industrial Sensor Supply |
|---|---|
Use Scenario: Prevents backfeed from downstream USB peripherals into host VBUS during hot-plug events. IC Role / Device Role / Timing Role: Reverse-polarity blocking diode placed between VBUS and load switch input. Use Value: 285mV VF minimizes voltage drop across diode, preserving >4.7V at load under 500mA-critical for USB 2.0 compliance. | Use Scenario: Isolates 3.3V sensor supply from shared microcontroller rail during sleep mode. IC Role / Device Role / Timing Role: Standby isolation diode enabling rail decoupling and leakage control. Use Value: 1.0µA max leakage at 10V ensures <3.3µW standby power loss-enables multi-year battery life in remote sensors. |
| DC/DC Output Rectification | Automotive Body Control Module |
Use Scenario: Output rectifier in 5V/0.5A buck converter powering FPGA I/O banks. IC Role / Device Role / Timing Role: High-frequency synchronous rectifier replacement in low-duty-cycle topologies. Use Value: 125pF CT at 0V enables clean turn-off with minimal ringing; 220°C/W RθJA allows full 0.5A load with ≤450mW dissipation on standard PCB. | Use Scenario: Reverse-battery protection in 12V lighting control circuit with CAN interface. IC Role / Device Role / Timing Role: Primary polarity guard ahead of LDO and transceiver inputs. Use Value: 40V VRRM withstands load-dump transients up to ISO 7637-2 Pulse 5a; −40°C to +125°C operation meets under-hood ambient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54LT1G | Same SOT23 package; 30V VRRM, 240mV VF @ 10mA, 2.0µA IR @ 25V | Limited to ≤24V systems; lower VF benefits ultra-low-power bias networks | Select when 30V rating suffices and sub-250mV forward drop is prioritized over surge robustness. |
| 1N5819TR | DO-41 through-hole; 40V VRRM, 450mV VF @ 1A, 1.0mA IR @ 24V | Higher leakage and VF; not surface-mountable; larger footprint | Use only for legacy through-hole prototyping where SMT is unavailable or thermal mass outweighs efficiency loss. |
Compared with SBAT54LT1G and 1N5819TR, BAT400D-7-F uniquely balances 40V rating, SOT23 mountability, and sub-550mV VF at 500mA-making it optimal for compact 24V industrial converters where both surge margin and thermal density matter.
Availability
BAT400D-7-F is available at Aetrix Electronics and suitable for USB power management, industrial sensor interfaces, DC/DC output rectification, and automotive body control modules requiring stable component supply and long-term manufacturability.
Supply support for BAT400D-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 North America.
The BAT400D belongs to Diodes' general-purpose Schottky rectifier product line, engineered for cost-effective, high-reliability power conversion in space-constrained industrial and consumer applications.
FAQ
What is the maximum continuous forward current for BAT400D-7-F?
The BAT400D-7-F is rated for 0.5A average rectified current (IF(AV)) at TA = +25°C on a 1-inch² 2-oz copper pad. Derating is required above +25°C ambient or with capacitive loads (20% reduction per datasheet), limiting usable current to ~0.4A at 75°C ambient or under heavy capacitive loading.
Is BAT400D-7-F qualified for automotive applications?
The BAT400D-7-F is JEDEC-qualified and built in IATF 16949-certified facilities, but it is not AEC-Q200-qualified out-of-box. Diodes offers automotive-grade variants with Q-suffix (e.g., BAT400DQ-7-F) that undergo additional stress testing and PPAP documentation-required for functional safety-critical vehicle subsystems.
How does the SOT23 package affect thermal performance?
With RθJA = 220°C/W on a 1-inch² 2-oz copper pad, the SOT23 package limits power dissipation to ~450mW before reaching 125°C junction temperature. Effective thermal relief-such as increased copper area, thermal vias, or adjacent ground planes-is essential to sustain 0.5A operation at elevated ambient temperatures.
Can BAT400D-7-F replace a standard PN rectifier like 1N4001?
Yes, but only in low-voltage, high-efficiency contexts. The BAT400D-7-F's 40V rating matches the 1N4001, yet its Schottky architecture provides faster switching and lower VF (285mV vs. ~1.1V), reducing conduction loss. However, its higher leakage (µA vs. nA) and lower surge rating (3A vs. 30A) make it unsuitable for high-voltage, high-surge AC line applications.
BAT400D-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 µA @ 30 V
- Capacitance @ Vr, F:
- 125pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
- Operating Temperature - Junction:
- -40°C ~ 125°C
BAT400D-7-F FAQ
1.How can I place an order for BAT400D-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT400D-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 BAT400D-7-F reliable?
The price and inventory of BAT400D-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 BAT400D-7-F is usually 5 days.
3.What payment methods are accepted for BAT400D-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT400D-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT400D-7-F?
BAT400D-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT400D-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 BAT400D-7-F?
For technical support, including BAT400D-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT400D-7-F requirements.
6.How does Aetrix verify that BAT400D-7-F is sourced from the original manufacturer or authorized distributors?
All BAT400D-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 BAT400D-7-F meets industry standards.
7.What is the process for return or replacement of BAT400D-7-F?
All BAT400D-7-F units undergo pre-shipment inspection (PSI). If there is an issue with BAT400D-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 BAT400D-7-F part is unused and in its original packaging.
Return procedure for BAT400D-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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