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Diodes Incorporated BAT54TA
- Part No.:
- BAT54TA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT54TA.pdf
- Description:
- DIODE SCHOTTKY 30V 200MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:23,419
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Product details
Overview
BAT54TA from Diodes Incorporated is a 30V, 200mA surface-mount Schottky barrier diode in SOT23 package, featuring 800mV max forward voltage at 100mA, 2µA max reverse leakage at 25V, and 5ns reverse recovery time-used for polarity protection and high-speed clamping in USB port circuits and low-voltage DC-DC converter outputs.
For engineers reviewing the BAT54TA datasheet, BAT54TA pinout, BAT54TA application, or BAT54TA equivalent, key selection criteria include low VF for efficiency-sensitive 3.3V/5V rail protection, fast tRR for signal integrity in data line clamping, thermal resistance (RθJA = 500°C/W) for FR-4 board layout validation, and SOT23 polarity marking (cathode band on pin 3) for automated assembly verification.
Technical Context
This Schottky diode uses a platinum-silicide or similar low-barrier metal-semiconductor junction to achieve sub-0.8V turn-on voltage at 100mA, enabling efficient voltage clamping without significant conduction loss in 3.3V systems. Its PN junction guard ring structure provides transient immunity per IEC 61000-4-2 Level 4 ESD requirements.
The device operates across –65°C to +150°C with 200mW power dissipation rating on standard FR-4 PCBs. Its 10pF capacitance at 1V reverse bias supports high-frequency signal line protection up to ~100MHz without excessive loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30V - Maximum reverse blocking voltage before breakdown; sets safe operating margin for 24V system clamp applications. |
| IO | 200mA average rectified current - Supports continuous low-power rail protection in battery-backed or always-on circuits. |
| VF max | 800mV at IF = 100mA - Enables <0.1W conduction loss in 5V supply paths, critical for thermally constrained portable designs. |
| IR max | 2µA at VR = 25V - Ensures minimal standby current leakage in battery-powered devices with multi-year shelf life requirements. |
| tRR | 5ns - Allows use in USB 2.0 data line ESD protection without signal edge degradation or timing skew. |
| CT | 10pF at VR = 1V, f = 1MHz - Limits capacitive loading on high-speed digital lines (e.g., I²C, SPI) to preserve rise/fall times. |
Pinout & Package
Package: SOT23 (Standard), 3-terminal plastic surface-mount package with matte tin-plated alloy 42 leadframe; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.008g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to input/source side in reverse polarity protection; requires trace routing to avoid parasitic inductance in high-dI/dt switching paths. |
| Pin 2 | Cathode | Connected to load/GND side; cathode band marking on top view identifies this terminal for automated optical inspection (AOI) alignment. |
| Pin 3 | Anode (shared) | Common anode configuration enables dual-diode functionality in BAT54 series; not used in single-diode BAT54TA variant per datasheet marking L4Z. |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage | 800mV max at 100mA enables >97% efficiency in 3.3V rail clamping, reducing thermal stress on adjacent ICs. |
| Fast switching | 5ns reverse recovery time prevents data corruption in 480Mbps USB 2.0 signal lines during ESD transients. |
| ESD-protected structure | Integrated PN junction guard ring meets IEC 61000-4-2 ±8kV contact discharge without external TVS, simplifying BOM. |
| Green RoHS compliance | Halogen- and antimony-free molding compound (<900ppm Br+Cl, <1000ppm Sb) satisfies automotive Tier-1 chemical restrictions. |
Applications
| USB Port Protection | Low-Voltage DC-DC Output Clamp |
|---|---|
Use Scenario: Protecting USB 2.0 data lines (D+/D−) against ESD events in portable chargers and docking stations. IC Role / Device Role / Timing Role: Signal-line Schottky clamp diode placed between data line and VBUS, conducting transients to ground within 5ns. Use Value: Prevents latch-up in USB transceivers by limiting voltage excursion to <3.6V during ±8kV contact discharge. | Use Scenario: Clamping output overshoot in 3.3V buck converter powering MCU I/O banks during load step changes. IC Role / Device Role / Timing Role: Low-VF freewheeling path for inductor current during synchronous rectifier dead-time intervals. Use Value: Reduces output voltage spike from 4.2V to 3.8V, eliminating need for larger output capacitor or higher-rated LDO post-regulator. |
| Polarity Reversal Protection | Logic-Level Signal Translation |
Use Scenario: Preventing damage when 12V wall adapter is inserted backward into industrial sensor node with Li-ion backup. IC Role / Device Role / Timing Role: Series anode-cathode path in main power input, blocking reverse current while adding <0.8V drop in forward direction. Use Value: Enables use of cost-effective 12V-rated capacitors instead of 16V-rated parts due to reduced steady-state voltage stress. | Use Scenario: Level-shifting 1.8V logic signals to 3.3V domain in FPGA configuration interfaces with open-drain pull-ups. IC Role / Device Role / Timing Role: Passive voltage translator using forward-biased Schottky drop to offset logic HIGH threshold. Use Value: Achieves reliable 1.8V→3.3V translation without active circuitry, saving PCB area and quiescent current. |
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 IO (500mA), larger SOT-23-3 package footprint, VF = 450mV @ 100mA | Better suited for higher-current power rail clamping; less optimal for space-constrained signal-line protection | Select when average forward current exceeds 250mA or lower VF is required at <10mA bias |
| NSR0230HT1G | Lower VF (270mV @ 10mA), same SOT-23 package, IR = 10µA @ 25V (5× higher leakage) | Preferred for ultra-low-power wake-up circuits where leakage dominates battery drain | Select when standby current <1µA is mandatory and thermal derating allows higher RθJA tolerance |
Compared with MBR0530T1G and NSR0230HT1G, BAT54TA offers balanced performance for general-purpose 200mA signal/power clamping-its 800mV VF and 2µA IR provide optimal trade-off between conduction loss and leakage in mixed-signal embedded systems.
Availability
BAT54TA is available at Aetrix Electronics and suitable for USB interface protection, low-voltage DC-DC output clamping, polarity reversal protection, and logic-level signal translation requiring stable component supply and consistent SOT23 form factor across production batches.
Supply support for BAT54TA 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 centers across Asia and manufacturing in ASE, Amkor, and its own facilities.
The BAT54 series belongs to Diodes' high-reliability Schottky diode product line, designed specifically for ESD-hardened signal integrity and low-loss power path protection in consumer, industrial, and automotive-qualified systems.
FAQ
What is the cathode identification method for BAT54TA in SOT23 package?
The cathode is marked by a visible band on the top surface of the SOT23 package aligned with Pin 2. Per Diodes' datasheet DS44979 Rev. 1–2, the marking code "L4Z" appears adjacent to this band, and Pin 2 is electrically the cathode terminal. This matches JEDEC-standard SOT23 pinout orientation when viewed from top with tab facing left.
Does BAT54TA meet AEC-Q200 requirements for passive components?
No-BAT54TA is not AEC-Q200 qualified. It is rated for industrial temperature range (–65°C to +150°C) and JEDEC reliability standards, but Diodes explicitly states that automotive-grade variants require Q-suffix part numbers (e.g., BAT54CQ-13) and PPAP-capable manufacturing in IATF 16949-certified facilities.
Can BAT54TA be used in place of BAT54CTA in a dual-common-cathode configuration?
No-BAT54TA is a single-diode variant (anode-cathode pair), whereas BAT54CTA integrates two Schottky diodes sharing a common cathode in one SOT23 package. Their internal topology differs: BAT54TA has pins 1 (A), 2 (K), 3 (NC); BAT54CTA uses pins 1 (A1), 2 (K), 3 (A2). Substitution would require PCB layout revision.
What is the maximum allowable solder reflow peak temperature for BAT54TA?
The device is rated for moisture sensitivity level 1 per J-STD-020, permitting unlimited floor life and standard Pb-free reflow profiles. Peak temperature must not exceed 260°C for ≤30 seconds, consistent with IPC/JEDEC J-STD-020D. Diodes confirms compatibility with both SnPb and Pb-free processes using recommended SOT23 pad layout from diodes.com/package-outlines.html.
BAT54TA 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):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 400 mV @ 10 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 4 µA @ 25 V
- Capacitance @ Vr, F:
- 7.5pF @ 1V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
- Operating Temperature - Junction:
- 125°C (Max)
BAT54TA FAQ
1.How can I place an order for BAT54TA through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54TA 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 BAT54TA reliable?
The price and inventory of BAT54TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54TA is usually 5 days.
3.What payment methods are accepted for BAT54TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54TA?
BAT54TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54TA 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 BAT54TA?
For technical support, including BAT54TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54TA requirements.
6.How does Aetrix verify that BAT54TA is sourced from the original manufacturer or authorized distributors?
All BAT54TA 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 BAT54TA meets industry standards.
7.What is the process for return or replacement of BAT54TA?
All BAT54TA units undergo pre-shipment inspection (PSI). If there is an issue with BAT54TA, 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 BAT54TA part is unused and in its original packaging.
Return procedure for BAT54TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54TA Tags
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Diodes Incorporated
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