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Taiwan Semiconductor Corporation BAT54SD
- Part No.:
- BAT54SD
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BAT54SD.pdf
- Description:
- DIODE ARR SCHOT 30V 200MA SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:8,795
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Product details
Overview
BAT54SD from Taiwan Semiconductor is a dual-channel Schottky barrier diode in SOT-363 package, rated for 30 V reverse voltage and 200 mA forward current per diode, with 1.0 V forward voltage at 100 mA and 5 ns reverse recovery time-used for high-speed polarity protection and clamping in compact DC power rails.
For engineers reviewing the BAT54SD datasheet, BAT54SD pinout, BAT54SD application, or BAT54SD 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 for reflow-safe assembly.
Technical Context
The BAT54SD integrates two independent Schottky diodes sharing a common cathode configuration (pinout: 1–Anode A, 2–Cathode, 3–NC, 4–Anode B, 5–Cathode, 6–NC), enabling dual reverse-polarity or clamping functions in one footprint. Its 30 V VRRM and 600 mA IFSM support transient surge handling in 5–24 V systems.
Thermal performance is defined by RθJA = 625°C/W and TJ max = +150°C, with junction capacitance ≤10 pF at 1 V reverse bias and IR ≤2 μA at 25 V - critical for low-leakage, high-frequency signal path isolation and fast switching in portable and automotive auxiliary circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - maximum reverse blocking voltage per diode, suitable for 24 V nominal rail clamping |
| IF (continuous) | 200 mA per diode - supports moderate-current protection without derating below 75°C ambient |
| VF @ 100 mA | 1.00 V - low conduction loss enables efficient reverse polarity protection in battery-powered devices |
| trr | 5 ns - enables operation up to ~70 MHz switching in clamp or snubber applications |
| RθJA | 625 °C/W - requires minimal copper area for thermal management in space-constrained PCBs |
| IR @ 25 V | ≤2 μA - ensures negligible leakage in high-impedance sensing or standby power paths |
| CT @ 1 V | ≤10 pF - minimizes capacitive loading on high-speed digital or RF signal lines |
Pinout & Package
Package: SOT-363 (SC-70-6), surface-mount, moisture sensitivity level 1, matte tin-plated leads, UL 94V-0 molding compound, 6.99 mg typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Diode A | Input node for first Schottky path; connects to supply or signal source requiring clamping |
| 2 | Cathode (common) | Shared cathode node - ties both diodes to reference (e.g., ground or regulated rail) |
| 3 | No Connect | Internally unconnected; must be left floating or grounded per layout guidelines |
| 4 | Anode of Diode B | Independent input node for second Schottky path; enables dual-rail or redundant protection |
| 5 | Cathode (common) | Electrically tied to Pin 2; confirms dual-cathode topology for compact common-return design |
| 6 | No Connect | Internally unconnected; no PCB trace required |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-cathode Schottky diodes | Enables simultaneous reverse polarity protection on two independent inputs sharing one return path |
| 5 ns reverse recovery time | Supports clean edge transitions in 10–50 MHz digital I/O clamping without ringing |
| 1.0 V VF at 100 mA | Reduces power loss by >30% vs. standard silicon diodes in 3.3–5 V logic rail protection |
| Moisture sensitivity level 1 | Permits standard reflow without baking, reducing manufacturing overhead and yield risk |
| RoHS & halogen-free compliance | Fulfills IPC-1752A reporting requirements and EU/China environmental mandates |
Applications
| USB Port Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Preventing damage from incorrect USB cable insertion or hot-swap transients on VBUS and D+/D− lines. IC Role / Device Role / Timing Role: Dual Schottky clamp protecting two signal/power paths with shared ground return. Use Value: 1.0 V VF limits voltage overshoot to <5.5 V during 2 A surges; 5 ns trr avoids data corruption on 480 Mbps USB 2.0 signals. | Use Scenario: Safeguarding microcontroller GPIOs and LIN bus transceivers against battery reversal or load dump spikes. IC Role / Device Role / Timing Role: Dual-anode, common-cathode diode array providing independent input clamping for sensor inputs and communication lines. Use Value: 30 V VRRM withstands ISO 7637-2 Pulse 1 (−100 V) when combined with TVS; ≤2 μA IR prevents battery drain in sleep mode. |
| Industrial PLC Digital Input | Portable Medical Sensor Interface |
Use Scenario: Conditioning 24 V dry-contact inputs subject to field wiring errors and EMI-induced transients. IC Role / Device Role / Timing Role: Dual-channel front-end clamp limiting input voltage to MCU-safe levels while preserving signal integrity. Use Value: 600 mA IFSM absorbs 100 ms overvoltage events; SOT-363 footprint allows placement directly at connector for shortest possible path. | Use Scenario: Isolating analog sensor outputs (e.g., thermistor, ECG electrode) from accidental reverse-biased bias rails in wearable patches. IC Role / Device Role / Timing Role: Low-leakage dual Schottky preventing cross-talk and offset drift between adjacent measurement channels. Use Value: ≤2 μA IR at 25 V eliminates measurable error in 10 MΩ+ sensor bridges; 10 pF CT avoids phase shift in <100 kHz bio-signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 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 topology | Not suitable for 24 V clamping; requires two devices for dual-path coverage | Select only if system operates ≤15 V and needs >500 mA per path |
| NSR20F30NXT5G | Dual common-anode, 30 V VRRM, 200 mA IF, VF = 0.45 V @ 100 mA - lower forward drop but inverted polarity configuration | Requires circuit redesign to accommodate anode-common routing instead of cathode-common | Prefer when minimizing conduction loss is critical and board layout permits topology change |
Compared with DMN2016LFG-7 and NSR20F30NXT5G, the BAT54SD provides verified common-cathode dual functionality in SOT-363 with balanced VF/trr trade-off, making it optimal for space-constrained 24 V industrial and USB-adjacent protection where shared ground return simplifies routing and reduces component count.
Availability
BAT54SD is available at Aetrix Electronics and suitable for USB port protection, automotive body control modules, industrial PLC digital inputs, and portable medical sensor interfaces requiring stable component supply across production lifecycles.
Supply support for BAT54SD 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 BAT54SD belongs to TSC's BAT54 family of ultra-small signal Schottky diodes, designed specifically for high-density, high-reliability protection and switching in portable, automotive, and industrial electronics where thermal efficiency and assembly robustness are critical.
FAQ
What is the pin configuration of the BAT54SD?
The BAT54SD uses a SOT-363 package with six terminals: Pin 1 is Anode A, Pin 2 is Common Cathode, Pin 3 is No Connect, Pin 4 is Anode B, Pin 5 is Common Cathode (tied internally to Pin 2), and Pin 6 is No Connect. This dual-anode, common-cathode arrangement enables independent clamping of two signals sharing one return path - a key feature confirmed in the official Taiwan Semiconductor datasheet for BAT54SD.
Is the BAT54SD RoHS and halogen-free compliant?
Yes, the BAT54SD is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the Taiwan Semiconductor datasheet. These compliance attributes are verified for the BAT54SD RFG ordering variant and apply to its SOT-363 packaging, matte tin plating, and UL 94V-0 molding compound - essential for export-ready designs in EU, China, and North American markets.
What is the maximum junction temperature for BAT54SD?
The BAT54SD has a maximum junction temperature (TJ max) of +150°C, with a storage temperature range of −65°C to +150°C. This rating is specified in the Absolute Maximum Ratings table of the official datasheet and applies under continuous operation with proper PCB thermal relief. Derating begins above +75°C ambient due to its 625°C/W junction-to-ambient thermal resistance - a critical constraint when designing BAT54SD into sealed enclosures or high-power density layouts.
How does the BAT54SD compare to the BAT54CD in terms of electrical performance?
The BAT54SD and BAT54CD share identical absolute maximum ratings (30 V VRRM, 200 mA IF, 600 mA IFSM) and core electrical specs (VF, trr, IR), but differ in pin configuration: BAT54SD is dual common-cathode, while BAT54CD is dual common-anode. This means BAT54SD connects both anodes to separate inputs and cathodes to a shared reference - a functional distinction that affects circuit topology, not parameter values. The BAT54SD marking code is KL8.
What is the reverse recovery time (trr) of BAT54SD and why does it matter?
The BAT54SD has a reverse recovery time (trr) of 5 ns, measured at IF = IR = 10 mA, RL = 100 Ω, and IRR = 1 mA. This ultrafast switching characteristic minimizes turn-off delay and voltage overshoot during high-frequency transients - crucial for maintaining signal integrity in USB 2.0 data lines, LIN bus interfaces, and PWM-controlled sensor excitation circuits where the BAT54SD serves as a clamp or polarity guard.
BAT54SD 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 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-363
BAT54SD FAQ
1.How can I place an order for BAT54SD through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54SD 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 BAT54SD reliable?
The price and inventory of BAT54SD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54SD is usually 5 days.
3.What payment methods are accepted for BAT54SD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54SD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54SD?
BAT54SD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54SD 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 BAT54SD?
For technical support, including BAT54SD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54SD requirements.
6.How does Aetrix verify that BAT54SD is sourced from the original manufacturer or authorized distributors?
All BAT54SD 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 BAT54SD meets industry standards.
7.What is the process for return or replacement of BAT54SD?
All BAT54SD units undergo pre-shipment inspection (PSI). If there is an issue with BAT54SD, 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 BAT54SD part is unused and in its original packaging.
Return procedure for BAT54SD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54SD Tags
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