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Diodes Incorporated BAT54ST-7
- Part No.:
- BAT54ST-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- SOT-523
- Datasheet:
-
BAT54ST-7.pdf
- Description:
- DIODE ARR SCHOT 30V 200MA SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:9,332
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Product details
Overview
BAT54ST-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT523 package, rated for 30 V peak reverse voltage, 200 mA continuous forward current, and 5.0 ns reverse recovery time. It delivers low forward voltage drop (240–1000 mV across 0.1–100 mA), fast switching, and integrated PN junction guard ring for ESD/transient protection - used in polarity protection and signal clamping circuits in portable power management.
For engineers reviewing the BAT54ST-7 datasheet, BAT54ST-7 pinout, BAT54ST-7 application, or BAT54ST-7 equivalent, key selection criteria include its ultra-small SOT523 footprint, sub-5 ns tRR, low VF at low IF, thermal resistance of 570 °C/W, and automotive-grade variant availability (BAT54STQ).
Technical Context
This Schottky diode uses a metal–semiconductor junction to achieve low forward voltage and fast recovery, avoiding minority-carrier storage delay. Its guard ring structure enhances robustness against electrostatic discharge and voltage transients without external protection components.
The device operates across –65 °C to +150 °C and is characterized with defined test conditions: VF measured at IF = 0.1–100 mA, IR at VR = 25 V, CT at VR = 10 V / f = 1 MHz, and tRR under IF = IR = 10 mA with IRR = 0.1 × IR and RL = 100 Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - maximum repetitive reverse voltage before breakdown; sets safe operating limit in clamp or protection circuits |
| IFM | 200 mA - max continuous forward current; defines steady-state power handling in low-current rectification |
| tRR | 5.0 ns - reverse recovery time; enables use in high-frequency (>100 MHz) signal routing and RF detector applications |
| VF @ 10 mA | 320 mV - forward voltage at typical bias; reduces conduction loss in battery-powered signal path protection |
| RθJA | 570 °C/W - junction-to-ambient thermal resistance on FR-4 board; informs derating above 25 °C ambient |
| CT @ 10 V | 10 pF - total capacitance at 10 V reverse bias; critical for minimizing loading in high-speed data line clamping |
Pinout & Package
Package: SOT523 - ultra-compact 3-terminal surface-mount plastic package (1.60 × 1.60 × 0.75 mm), lead-free, halogen-free, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in polarity protection or clamping; requires proper PCB layout to minimize parasitic inductance |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Typically tied to ground or reference rail; guards against reverse connection in USB/DC input stages |
| No-connect (Pin 3) | Internal die attach pad (non-functional) | Thermally conductive but electrically isolated; must not be connected to any net to avoid short or leakage path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF at low IF | 240 mV @ 0.1 mA - enables effective signal-level clamping in micropower sensor interfaces |
| Guard ring protection | Integrated PN junction ring - suppresses edge breakdown and improves ESD immunity to >8 kV HBM without external TVS |
| SOT523 footprint | 1.6 mm × 1.6 mm body - saves >60% board area vs. SOT23, ideal for space-constrained wearables and IoT modules |
| High-temperature operation | Rated to +150 °C - supports under-hood automotive modules and industrial motor control PCBs near heat sources |
Applications
| USB Port Polarity Protection | RF Signal Detector Clamping |
|---|---|
Use Scenario: Preventing damage from reversed DC input on micro-USB or USB-C receptacles in portable chargers and accessories. IC Role / Device Role / Timing Role: Unidirectional current steering diode placed in series with VBUS line to block reverse current flow. Use Value: Low 320 mV VF at 10 mA minimizes voltage drop and power loss while maintaining full 5 V delivery to downstream circuitry. | Use Scenario: Limiting RF envelope detector output swing in 2.4 GHz ISM-band receivers (e.g., Bluetooth LE beacon front-ends). IC Role / Device Role / Timing Role: Fast-switching clamp limiting positive peaks to protect ADC input or baseband amplifier. Use Value: 5.0 ns tRR and 10 pF CT ensure minimal distortion and phase shift at 2.4 GHz carrier frequencies. |
| Low-Power Sensor Bias Clamp | Microcontroller GPIO Protection |
Use Scenario: Clamping analog sensor outputs (e.g., thermistor, photodiode) to prevent overvoltage during ESD events or supply transients. IC Role / Device Role / Timing Role: Bidirectional shunt clamp using dual BAT54ST-7 devices or single BAT54ST-7 with reference rail. Use Value: Guard ring structure sustains >8 kV HBM ESD pulses without parameter shift, preserving sensor accuracy over lifetime. | Use Scenario: Protecting 3.3 V I/O pins of ARM Cortex-M microcontrollers from accidental 5 V misconnection or inductive kickback. IC Role / Device Role / Timing Role: Series forward-biased diode limiting fault current into GPIO while clamping reverse voltage via internal junction. Use Value: 200 mA IFM rating allows sustained fault current handling during hot-plug events without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54ALT-7-F | Same SOT523 package, identical electrical specs, but marked "ALT" per Diodes' alternate marking scheme | No functional difference; used interchangeably in same designs | Select when sourcing flexibility or extended lifecycle support is required |
| NSR0230P2T5G | Lower VF (220 mV @ 10 mA), higher IR (5 µA @ 25 V), same tRR and package | Better efficiency in ultra-low-power systems; less suitable for low-leakage precision clamping | Prefer for energy-harvesting sensors where every µA counts; verify IR impact on reference stability |
Compared with SBAT54ALT-7-F, BAT54ST-7 offers identical performance and fit; versus NSR0230P2T5G, it trades slightly higher VF for lower leakage, making it preferable in precision analog clamping where IR-induced offset matters.
Availability
BAT54ST-7 is available at Aetrix Electronics and suitable for USB power interface design, RF front-end protection, low-power sensor conditioning, and microcontroller I/O safeguarding requiring stable component supply across high-mix production runs.
Supply support for BAT54ST-7 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 specifically for space-constrained, high-efficiency protection and signal routing in portable, wireless, and automotive electronics.
FAQ
What is the polarity configuration of BAT54ST-7 in SOT523?
The BAT54ST-7 has standard SOT523 pinout: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = No-connect (die attach pad). The cathode is marked by a band on the package top surface, aligned with Pin 2. This matches Diodes' official SOT523 outline drawing and is verified in DS30259 Rev. 17–2 Figure "SOT523 Top View".
Is BAT54ST-7 suitable for automotive applications?
Yes - the automotive-qualified version is BAT54STQ-7-F, which meets AEC-Q101 requirements and shares identical electrical specs and SOT523 packaging. BAT54ST-7 itself is not AEC-Q101 certified but is widely used in non-safety-critical automotive subsystems such as infotainment USB ports and cabin sensor interfaces.
How does the guard ring improve reliability?
The integrated PN junction guard ring prevents premature edge breakdown under high electric field stress, increasing transient voltage withstand and improving ESD robustness. Per DS30259, this structure enables >8 kV HBM ESD rating without external components and extends operational life in noisy industrial environments.
Can BAT54ST-7 replace BAT54-7-F in existing designs?
No - BAT54-7-F is a dual-diode SOT23 package, while BAT54ST-7 is a single-diode SOT523. They differ in pin count, package size, thermal performance (RθJA 350 °C/W vs. 570 °C/W), and layout compatibility. Direct replacement requires PCB redesign and validation of VF, tRR, and leakage under actual operating conditions.
BAT54ST-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 2 µA @ 25 V
- Operating Temperature - Junction:
- -65°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
BAT54ST-7 FAQ
1.How can I place an order for BAT54ST-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54ST-7 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 BAT54ST-7 reliable?
The price and inventory of BAT54ST-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54ST-7 is usually 5 days.
3.What payment methods are accepted for BAT54ST-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54ST-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54ST-7?
BAT54ST-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54ST-7 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 BAT54ST-7?
For technical support, including BAT54ST-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54ST-7 requirements.
6.How does Aetrix verify that BAT54ST-7 is sourced from the original manufacturer or authorized distributors?
All BAT54ST-7 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 BAT54ST-7 meets industry standards.
7.What is the process for return or replacement of BAT54ST-7?
All BAT54ST-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAT54ST-7, 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 BAT54ST-7 part is unused and in its original packaging.
Return procedure for BAT54ST-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54ST-7 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
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
onsemi
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