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Taiwan Semiconductor Corporation BAT54T
- Part No.:
- BAT54T
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BAT54T.pdf
- Description:
- DIODE ARR SCHOT 30V 200MA SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
BAT54T from Taiwan Semiconductor is a 30V, 200mA dual-channel Schottky barrier diode in SOT-363 package, featuring 1.0V forward voltage at 100mA and 5ns reverse recovery time, used for high-speed voltage clamping and reverse polarity protection in compact DC power rails.
For engineers reviewing the BAT54T datasheet, BAT54T pinout, BAT54T application, or BAT54T equivalent, key selection criteria include its low VF (≤1.0V @ 100mA), fast trr (≤5ns), SOT-363 footprint compatibility, and dual-diode configuration with independent anode-cathode pairs.
Technical Context
The BAT54T integrates two independent Schottky diodes in a single SOT-363 package, each rated for 30V repetitive peak reverse voltage and 200mA continuous forward current. Its junction-to-ambient thermal resistance is 625°C/W, and it operates across –65°C to +150°C junction temperature range.
Designed for surface-mount assembly with matte tin-plated leads compliant with J-STD-002, the device meets JESD201 Class 1A whisker resistance and UL 94V-0 flammability requirements. Moisture sensitivity level is rated at Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Continuous) | 200 mA - maximum steady-state forward current per diode without derating |
| VRRM | 30 V - maximum reverse voltage each diode blocks reliably in circuit |
| VF @ 100mA | 1.00 V - forward drop determining conduction loss in low-voltage rail protection |
| trr | 5 ns - enables switching above 50 MHz in clamp or steering applications |
| TJ max | +150 °C - supports operation in thermally constrained industrial or automotive under-hood environments |
| RθJA | 625 °C/W - defines thermal limit for 200mW power dissipation in still-air PCB layout |
Pinout & Package
Package: SOT-363 - 6-pin, dual-diode surface-mount package with 1.3mm × 2.1mm footprint and 0.95mm height; terminals are matte tin-plated for lead-free reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Diode A | Input node for first Schottky path; connects to protected supply or signal line |
| 2 | Cathode of Diode A | Output/return node for Diode A; ties to ground or reference rail |
| 3 | No Connection | Internally unconnected; must be left floating or grounded per layout guidelines |
| 4 | Cathode of Diode B | Shared cathode configuration allows common-rail clamping or OR-ing |
| 5 | Anode of Diode B | Second input node enabling dual-rail or redundant protection paths |
| 6 | No Connection | Internally unconnected; no electrical function; avoid routing traces |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent Schottky diodes | Enables separate clamping on two signals or split-rail reverse protection without discrete parts |
| 5 ns reverse recovery time | Supports >50 MHz transient suppression in digital I/O or USB data lines |
| 1.0 V VF @ 100 mA | Reduces conduction loss by ~30% vs. standard silicon diodes in 3.3V/5V systems |
| SOT-363 package with Level 1 MSL | Allows standard reflow without baking; compatible with high-volume automated assembly |
| Junction temp range: –65°C to +150°C | Validates use in extended-temperature industrial controllers and automotive body electronics |
Applications
| USB Port Protection | DC Power Rail Clamping |
|---|---|
Use Scenario: Protecting USB 2.0 data lines (D+/D−) from ESD and overvoltage transients during hot-plug events. IC Role / Device Role / Timing Role: Dual Schottky clamping diode providing low-capacitance (<10 pF), fast-response path to VBUS or GND. Use Value: Limits voltage excursion to ≤3.6 V using 30 V VRRM rating while maintaining signal integrity via 5 ns trr. | Use Scenario: Preventing damage from reverse battery connection in 3.3 V or 5 V embedded system power inputs. IC Role / Device Role / Timing Role: Reverse polarity protection element placed in series with input rail, leveraging low VF to minimize dropout. Use Value: Delivers <100 mV dropout at 100 mA due to 1.0 V VF spec, preserving headroom in low-voltage designs. |
| Signal Steering in Logic Circuits | OR-ing Diodes in Dual-Supply Systems |
Use Scenario: Directing logic-level signals between two microcontroller GPIOs with bidirectional isolation. IC Role / Device Role / Timing Role: Fast-switching steering diode ensuring minimal propagation delay and cross-talk. Use Value: 5 ns trr and <10 pF CT enable clean edge transitions up to 20 MHz without distortion. | Use Scenario: Combining outputs from two independent 3.3 V regulators to provide fault-tolerant power to FPGA core rails. IC Role / Device Role / Timing Role: Dual-anode, shared-cathode configuration acting as discrete OR-ing element. Use Value: Independent anodes (Pins 1 & 5) and shared cathode (Pin 4) simplify layout versus two discrete SOT-23 diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN2004LKQ-7 | Single-channel SOT-23; 200 mA, 30 V, VF = 0.45 V @ 100 mA; trr = 4 ns | Lacks dual-diode integration; requires two devices for same functionality as BAT54T | Prefer when board space allows discrete placement and lower VF is critical |
| NSR0230HT1G | Single-channel SOD-123; 200 mA, 30 V, VF = 0.45 V @ 100 mA; trr = 4 ns; 10 pF CT | Not pin-compatible; different package (SOD-123) and single-diode topology | Select when cost-per-diode is prioritized over integration density |
Compared with DMN2004LKQ-7 and NSR0230HT1G, the BAT54T provides dual-diode integration in SOT-363, reducing component count and PCB area by 50% in clamping or OR-ing roles-though with higher VF than either alternative.
Availability
BAT54T is available at Aetrix Electronics and suitable for USB port protection, DC power rail clamping, signal steering in logic circuits, and OR-ing diodes in dual-supply systems requiring stable component supply and long-term manufacturability.
Supply support for BAT54T 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 BAT54T belongs to TSC's BAT54 family of high-speed Schottky diodes, engineered specifically for compact, low-loss protection and signal routing in space-constrained portable and embedded electronics.
FAQ
What is the marking code for BAT54T?
The BAT54T is marked with "KLA" on the top surface of the SOT-363 package. This marking code distinguishes it from other variants in the BAT54 series (e.g., BAT54AD = KL6, BAT54CD = KL7). The KLA identifier is laser-etched and visible under 20× magnification, confirming authenticity and traceability for the BAT54T.
Does BAT54T support lead-free reflow soldering?
Yes, the BAT54T features matte tin-plated leads qualified per J-STD-002 for lead-free reflow processes, including peak temperatures up to 260°C. Its moisture sensitivity level is rated Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly-critical for reliable manufacturing of the BAT54T.
What is the maximum power dissipation for BAT54T at room temperature?
The BAT54T has a maximum power dissipation (PD) of 200 mW at TA = 25°C, derived from its RθJA of 625°C/W and TJmax of +150°C. At ambient temperatures above 25°C, derating is required per the power derating curve in the datasheet-e.g., PD drops to ~100 mW at 75°C ambient. This limit applies to the entire SOT-363 package, not per diode.
Can BAT54T be used for reverse polarity protection in a 5 V system?
Yes, the BAT54T is commonly used for reverse polarity protection in 5 V systems. With a 30 V VRRM rating and 1.0 V VF at 100 mA, it introduces only ~100 mV dropout at typical load currents, preserving sufficient headroom. Its dual-diode structure allows implementation in series or common-cathode configurations-making the BAT54T suitable for both single- and dual-rail 5 V protection schemes.
Is BAT54T RoHS and halogen-free compliant?
Yes, the BAT54T is RoHS compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor certifies that all materials-including molding compound, die attach, and lead finish-meet these environmental standards. Compliance documentation, including test reports and declarations of conformity, is available upon request for the BAT54T to support regulatory submissions.
BAT54T 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:
- 3 Independent
- 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
BAT54T FAQ
1.How can I place an order for BAT54T through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54T 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 BAT54T reliable?
The price and inventory of BAT54T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54T is usually 5 days.
3.What payment methods are accepted for BAT54T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54T?
BAT54T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54T 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 BAT54T?
For technical support, including BAT54T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54T requirements.
6.How does Aetrix verify that BAT54T is sourced from the original manufacturer or authorized distributors?
All BAT54T 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 BAT54T meets industry standards.
7.What is the process for return or replacement of BAT54T?
All BAT54T units undergo pre-shipment inspection (PSI). If there is an issue with BAT54T, 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 BAT54T part is unused and in its original packaging.
Return procedure for BAT54T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT54T Tags
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