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Diodes Incorporated BAT54STA
- Part No.:
- BAT54STA
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT54STA.pdf
- Description:
- DIODE ARR SCHOT 30V 200MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:67,145
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Product details
Overview
BAT54STA from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT23 package, rated for 30 V peak reverse voltage, 200 mA average forward current, and 800 mV max forward voltage at 100 mA. It features fast 5.0 ns reverse recovery time, 2 µA max reverse leakage at 25 V, and PN junction guard ring for ESD/transient protection-used in polarity protection and signal clamping circuits in portable power management.
For engineers reviewing the BAT54STA datasheet, BAT54STA pinout, BAT54STA application, or BAT54STA equivalent, key selection criteria include low VF for efficiency-critical 3.3 V/5 V rail protection, SOT23 footprint compatibility, reverse recovery performance in high-frequency switching nodes, and RoHS-compliant "Green" construction for consumer and industrial PCBs.
Technical Context
This Schottky diode uses a planar epitaxial structure with integrated PN guard ring to suppress edge breakdown and improve transient robustness without compromising switching speed. Its low 500 °C/W junction-to-ambient thermal resistance enables operation up to +150 °C ambient when mounted on FR-4 with recommended pad layout.
The device exhibits soft reverse recovery (tRR = 5.0 ns) and low 10 pF capacitance at 1.0 V reverse bias-critical for minimizing ringing in high-speed signal routing and DC-DC converter catch diode applications where di/dt exceeds 1 A/ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - supports input rails up to 24 V nominal with margin for transients |
| IO | 200 mA - suitable for low-power signal path or auxiliary supply clamping |
| VF max | 800 mV @ 100 mA - reduces conduction loss vs. silicon diodes in battery-fed circuits |
| IR max | 2.0 µA @ 25 V - ensures minimal leakage in high-impedance sensing or standby paths |
| tRR | 5.0 ns - enables use in >10 MHz switching nodes without excessive recovery loss |
| CT | 10 pF @ 1.0 V - limits capacitive loading on high-speed digital or RF signal lines |
| RθJA | 500 °C/W - requires minimum copper area (per Diodes' layout guide) for thermal reliability |
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 ≈ 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in polarity protection or clamp configuration |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to ground or lower-potential rail; defines reverse voltage rating direction |
| No Connect (Pin 3) | Internal die attach flag / thermal slug | Not electrically connected; may be tied to ground plane for thermal relief but not required |
Key Features
| Feature | Design Value |
|---|---|
| PN junction guard ring | Enables ESD robustness (IEC 61000-4-2 Level 4) without degrading tRR or CT |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900 ppm Br, <900 ppm Cl, <1000 ppm Sb |
| UL 94V-0 molding compound | Ensures flame-retardant PCB assembly in consumer and industrial enclosures |
| SOT23 footprint compatibility | Direct drop-in replacement for BAT54, BAT54A, BAT54C, and similar Schottky diodes |
Applications
| USB Port Polarity Protection | Low-Voltage Signal Clamping |
|---|---|
Use Scenario: Preventing damage from reversed USB cable insertion in portable chargers and OTG accessories. IC Role / Device Role / Timing Role: Unidirectional current path enforcer placed in series with VBUS line. Use Value: 800 mV VF minimizes voltage drop across 5 V rail; 30 V VRRM accommodates USB 2.0/3.0 surge margins. | Use Scenario: Limiting analog sensor output swing to MCU ADC input range (e.g., 0–3.3 V). IC Role / Device Role / Timing Role: Clamp diode shunting excess voltage to VDD or GND. Use Value: 5.0 ns tRR prevents latch-up during fast overvoltage transients; 10 pF CT avoids signal distortion at ≤10 MHz bandwidth. |
| DC-DC Converter Catch Diode | Logic-Level Translation Interface |
Use Scenario: Flyback diode in non-synchronous buck converters for wearables and IoT sensors. IC Role / Device Role / Timing Role: Freewheeling path for inductor current during high-side switch off-time. Use Value: Low VF improves light-load efficiency; 200 mA IO supports ≤100 mA output designs with margin. | Use Scenario: Bidirectional level shifting between 1.8 V I²C bus and 3.3 V microcontroller GPIO. IC Role / Device Role / Timing Role: Passive voltage limiter preventing back-powering of lower-voltage domain. Use Value: 2 µA IR avoids loading weak pull-ups; SOT23 size fits dense mixed-voltage PCB layouts. |
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 NSS40201MR6T1G | Same SOT23 package; 30 V VRRM, 200 mA IO, but 450 mV typical VF @ 10 mA (vs. 800 mV max for BAT54STA) | Lower VF benefits ultra-low-current bias networks; slightly higher CT (15 pF) | Select when optimizing for sub-mA leakage-sensitive biasing, not high-current conduction |
| Vishay VS-2EDH01HM3/85A | DO-214AC (SMA) package; 30 V VRRM, 200 mA IO, 550 mV VF @ 100 mA, but 10× larger footprint and 200 ns tRR | Higher thermal mass suits higher ambient temp; unsuitable for space-constrained layouts | Choose only when board-level thermal dissipation >150 mW is required and SOT23 is unavailable |
Compared with NSS40201MR6T1G and VS-2EDH01HM3/85A, BAT54STA offers best-in-class balance of compact SOT23 size, guaranteed 800 mV VF ceiling, and 5 ns tRR-making it optimal for high-density, high-frequency, and battery-sensitive designs where leakage and layout area are constrained.
Availability
BAT54STA is available at Aetrix Electronics and suitable for USB port protection, low-voltage signal clamping, DC-DC converter catch diode, and logic-level translation interface applications requiring stable component supply and full RoHS 3 compliance.
Supply support for BAT54STA 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 BAT54 series belongs to Diodes' general-purpose Schottky diode product line, engineered for cost-effective, high-reliability signal integrity and power path protection in consumer, computing, and industrial electronics.
FAQ
What is the maximum continuous forward current rating for BAT54STA?
The BAT54STA is rated for 200 mA average rectified output current at +25°C ambient temperature when mounted on an FR-4 PCB with Diodes' recommended pad layout. Derating applies above +25°C per the published power derating curve-e.g., ~120 mA at +85°C ambient due to thermal resistance limitations.
Does BAT54STA have automotive qualification?
No, BAT54STA is not AEC-Q200 qualified. Diodes offers automotive-grade variants under Q-suffix part numbers (e.g., BAT54SQ) that undergo additional stress testing, PPAP documentation, and IATF 16949 manufacturing controls. BAT54STA is intended for commercial and industrial applications only.
How does the PN junction guard ring affect ESD performance?
The integrated PN junction guard ring in BAT54STA suppresses edge breakdown during electrostatic discharge events, enabling robustness to ±8 kV contact discharge (IEC 61000-4-2 Level 4) without increasing forward voltage or reverse recovery time-verified per Diodes' internal qualification test reports.
Can BAT54STA replace BAT54CTA in a circuit?
Yes-BAT54STA and BAT54CTA share identical electrical specifications, SOT23 package, and thermal characteristics. The difference is internal die configuration: BAT54STA is single-anode/single-cathode, while BAT54CTA is common-cathode dual. Replacement is valid only if the circuit uses only one diode element and pin 3 is unused or grounded per SOT23 layout.
BAT54STA 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
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io) (per Diode):
- 200mA (DC)
- 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:
- 4 µA @ 25 V
- Operating Temperature - Junction:
- 125°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BAT54STA FAQ
1.How can I place an order for BAT54STA through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54STA 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 BAT54STA reliable?
The price and inventory of BAT54STA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54STA is usually 5 days.
3.What payment methods are accepted for BAT54STA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54STA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54STA?
BAT54STA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54STA 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 BAT54STA?
For technical support, including BAT54STA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54STA requirements.
6.How does Aetrix verify that BAT54STA is sourced from the original manufacturer or authorized distributors?
All BAT54STA 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 BAT54STA meets industry standards.
7.What is the process for return or replacement of BAT54STA?
All BAT54STA units undergo pre-shipment inspection (PSI). If there is an issue with BAT54STA, 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 BAT54STA part is unused and in its original packaging.
Return procedure for BAT54STA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54STA Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
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