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Taiwan Semiconductor Corporation BAT54AD
- Part No.:
- BAT54AD
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BAT54AD.pdf
- Description:
- DIODE ARR SCHOT 30V 200MA SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:4,250
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Product details
Overview
BAT54AD from Taiwan Semiconductor is a dual-channel Schottky barrier diode in SOT-363 package, rated for 200 mA forward current and 30 V repetitive peak reverse voltage, with 1.00 V forward voltage at 100 mA and 5 ns reverse recovery time - used for high-speed clamping and polarity protection in compact DC power rails.
For engineers reviewing the BAT54AD datasheet, BAT54AD pinout, BAT54AD application, or BAT54AD equivalent, key selection criteria include dual-diode configuration, low VF at low-to-moderate currents, sub-10 ns trr, SOT-363 thermal resistance (625°C/W), and moisture sensitivity level 1 compliance.
Technical Context
The BAT54AD integrates two independent Schottky diodes in a single SOT-363 package with common cathode configuration (pinout: 1–Anode A, 2–Cathode, 3–Anode B, 4–NC, 5–Cathode, 6–NC). It operates across –65°C to +150°C junction temperature range and supports fast switching via low stored charge and minimal reverse recovery time.
Each diode exhibits VF ≤ 0.50 V at 30 mA and ≤ 1.00 V at 100 mA, IR ≤ 2 μA at 25 V reverse bias, and CT ≤ 10 pF at 1 V - enabling efficient voltage clamping and low-loss reverse polarity protection without significant capacitive loading on signal or supply lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Continuous) | 200 mA - maximum steady-state forward current per diode without derating at 25°C ambient |
| VRRM | 30 V - peak reverse voltage each diode withstands continuously without breakdown |
| VF @ 100 mA | 1.00 V - forward drop limiting conduction loss in low-voltage rail protection circuits |
| trr | 5 ns - enables operation in >10 MHz switching applications with minimal switching loss |
| RθJA | 625 °C/W - thermal resistance requiring careful PCB copper area allocation for sustained 200 mA operation |
| IR @ 25 V | ≤2 μA - ensures negligible leakage in battery-backed or high-impedance sensing paths |
| CT @ 1 V | ≤10 pF - minimizes signal distortion in RF detector or high-speed logic interface clamping |
Pinout & Package
Package: SOT-363 (6-pin, 1.3 mm × 2.1 mm × 0.95 mm), surface-mount, matte tin-plated leads, UL 94V-0 molding compound, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Diode A | Input node for first Schottky path; connects to protected source or signal line |
| 2 | Cathode (Common) | Shared cathode node - ties both diodes to reference (e.g., ground or VCC rail) |
| 3 | Anode of Diode B | Input node for second independent Schottky path; enables dual-rail or redundancy use |
| 4 | No Connect | Internally unconnected; must remain floating - no PCB trace or solder mask required |
| 5 | Cathode (Common) | Redundant cathode terminal - electrically identical to Pin 2; improves current sharing and thermal path |
| 6 | No Connect | Internally unconnected; must remain floating - no routing or termination needed |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-cathode Schottky diodes | Enables compact dual-rail clamping or redundant polarity protection in one footprint |
| Fast reverse recovery (trr ≤ 5 ns) | Supports high-frequency transient suppression without ringback or shoot-through in DC/DC feedback paths |
| Low VF (≤0.50 V @ 30 mA) | Reduces forward conduction loss in battery-powered systems where voltage headroom is critical |
| SOT-363 with MS Level 1 rating | Allows standard reflow assembly without baking; compatible with high-volume automated SMT lines |
| Junction temp range: –65°C to +150°C | Validates operation in automotive under-hood and industrial motor-control environments |
Applications
| USB Port Protection | DC-DC Feedback Clamping |
|---|---|
Use Scenario: Preventing damage from accidental reverse insertion or hot-plug ESD transients on USB Type-A/B data and power lines. IC Role / Device Role / Timing Role: Dual-diode BAT54AD provides separate anode paths for VBUS and D+/D− lines, with shared cathode tied to system ground. Use Value: Sub-1 V VF avoids degrading USB 5 V regulation margin; 5 ns trr prevents data corruption during hot-swap events. | Use Scenario: Limiting overshoot on feedback nodes of buck converters operating above 500 kHz switching frequency. IC Role / Device Role / Timing Role: BAT54AD clamps feedback resistor divider output to reference rail, preventing controller latch-up during load transients. Use Value: 10 pF capacitance avoids phase shift in control loop; 5 ns recovery maintains loop stability at high frequencies. |
| Industrial Sensor Power Polarity Guard | Low-Voltage Logic-Level Shifting |
Use Scenario: Protecting 3.3 V or 5 V analog sensor modules from miswired field wiring in factory automation cabinets. IC Role / Device Role / Timing Role: BAT54AD placed in series with sensor VDD input, with cathode to system rail and anode to connector - blocks reverse current. Use Value: 200 mA IF rating supports typical 100–150 mA sensor loads; 1.00 V VF adds <2% error at 3.3 V nominal supply. | Use Scenario: Bidirectional level translation between 1.8 V I²C master and 3.3 V peripheral using passive diode-based method. IC Role / Device Role / Timing Role: BAT54AD's matched dual diodes implement low-cost, low-capacitance direction-aware clamping on SDA/SCL lines. Use Value: Matched VF ensures symmetrical rise/fall times; 10 pF CT preserves >400 kHz I²C timing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN2016LFG-7 | Single-channel, 20 V VRRM, 1.2 A IF - higher current but lower voltage rating and different package (SOT-563) | Not suitable for 30 V clamping; requires layout change due to different pinout and size | Select only when >200 mA continuous current is required and 30 V rating is not needed |
| NSR0230P2T5G | Dual common-cathode, same SOT-363, but VF = 0.36 V @ 100 mA - lower forward drop, 30 V VRRM, 200 mA IF | Superior for ultra-low-drop applications; identical pinout and footprint | Preferred where <0.5 V VF is critical; verify IR spec (0.5 μA max) suits high-impedance nodes |
Compared with DMN2016LFG-7 and NSR0230P2T5G, the BAT54AD offers balanced 30 V/200 mA capability in a widely adopted SOT-363 dual-diode configuration - making it optimal for general-purpose clamping and polarity protection where moderate VF and proven reliability are prioritized over extreme low-drop or high-current performance.
Availability
BAT54AD is available at Aetrix Electronics and suitable for USB port protection, DC-DC feedback clamping, and industrial sensor polarity guard applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for BAT54AD 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and consumer markets since 1979.
The BAT54AD belongs to TSC's BAT54 family of high-speed Schottky diodes designed specifically for compact, low-loss voltage clamping and reverse polarity protection in space-constrained power and interface circuits.
FAQ
What is the pin configuration of the BAT54AD?
The BAT54AD uses a 6-pin SOT-363 package with pins configured as follows: Pin 1 = Anode A, Pin 2 = Common Cathode, Pin 3 = Anode B, Pin 4 = No Connect, Pin 5 = Common Cathode (redundant), Pin 6 = No Connect. This dual-anode, common-cathode arrangement allows independent clamping paths sharing one reference node - confirmed in Taiwan Semiconductor's official datasheet revision H2111.
Does the BAT54AD support bidirectional signal clamping?
No - the BAT54AD contains two anodes and a shared cathode, so it supports unidirectional clamping from either anode to cathode (e.g., to ground or VCC). For true bidirectional clamping, external circuitry such as back-to-back diodes or a dedicated TVS is required. The BAT54AD datasheet specifies no reverse conduction path between anodes.
What is the maximum power dissipation of the BAT54AD at room temperature?
The BAT54AD has a maximum power dissipation (PD) of 200 mW at TA = 25°C, as specified in its Absolute Maximum Ratings table. Derating begins above 25°C at 1.6 mW/°C (based on RθJA = 625°C/W), meaning usable power drops to ~100 mW at 85°C ambient - critical for sustained 200 mA operation in enclosed enclosures.
Is the BAT54AD RoHS and halogen-free compliant?
Yes - the BAT54AD is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the official Taiwan Semiconductor datasheet (Version H2111). It also meets J-STD-020 moisture sensitivity level 1 and JESD 201 class 1A whisker resistance requirements.
Can the BAT54AD replace the BAT54C in the same PCB layout?
No - the BAT54C uses a common-anode configuration (anodes tied together), while the BAT54AD uses common-cathode. Their pinouts differ: BAT54C marks cathodes on Pins 1 and 3, whereas BAT54AD places cathodes on Pins 2 and 5. Swapping them without layout modification will cause functional failure. Always verify marking code (KL6 for BAT54AD) and schematic symbol polarity before substitution.
BAT54AD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 2 Pair Common Anode
- 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-363
BAT54AD FAQ
1.How can I place an order for BAT54AD through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54AD 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 BAT54AD reliable?
The price and inventory of BAT54AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54AD is usually 5 days.
3.What payment methods are accepted for BAT54AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54AD?
BAT54AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54AD 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 BAT54AD?
For technical support, including BAT54AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54AD requirements.
6.How does Aetrix verify that BAT54AD is sourced from the original manufacturer or authorized distributors?
All BAT54AD 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 BAT54AD meets industry standards.
7.What is the process for return or replacement of BAT54AD?
All BAT54AD units undergo pre-shipment inspection (PSI). If there is an issue with BAT54AD, 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 BAT54AD part is unused and in its original packaging.
Return procedure for BAT54AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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