PDTC143XU Nexperia Integrated Circuit (SOT23 (3-Pin)) In Stock
PDTC143XU is a digital NPN transistor from Nexperia with built-in 4.7 kΩ input resistor and 10 kΩ base-emitter resistor for direct logic-level drive. It supports 100 mA collector current and 50 V breakdown voltage in a 3-pin SOT-323 UMT package. Available from global distributors for high-volume consumer and industrial switching designs.
- Manufacturer
- Nexperia
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- PDTC143XU Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Built-in 4.7 kΩ input and 10 kΩ base-emitter resistors eliminate external components for direct interface to 3.3 V and 5 V logic signals
- 100 mA collector current rating at up to 50 V VCEmax enables reliable switching of LEDs, relays, and small loads
- Compact SOT-323 (UMT) 3-pin package with resistor ratio of 0.476 minimizes board area in dense consumer electronic assemblies
Applications
PDTC143XU is widely used as a logic-level switching transistor for driving LEDs, small relays, and signal conditioning circuits in consumer electronics, home appliances, and portable devices. Its built-in biasing resistors simplify schematic design and reduce component count in microcontroller GPIO interfaces. The compact SOT-323 package makes it ideal for space-constrained PCBs in wearable technology and handheld instruments.
Specifications
| Date Of Intro | 1999-04-20 |
| YTEOL | 7 |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How do the built-in resistors in PDTC143XU simplify circuit design compared with a discrete NPN transistor?
PDTC143XU integrates a 4.7 kΩ input resistor and a 10 kΩ base-emitter resistor internally, eliminating the need for two external components per transistor switch. A bare NPN transistor requires designers to calculate and place separate base resistors to limit current from 3.3 V or 5 V GPIO outputs, whereas PDTC143XU connects directly to logic levels while maintaining a stable resistance ratio of 0.476 across temperature.
What maximum load current and voltage can PDTC143XU switch in a typical LED driving application?
PDTC143XU supports up to 100 mA collector current and a maximum collector-emitter voltage of 50 V, making it capable of driving high-brightness LEDs, small relays, and buzzer coils from 3.3 V or 5 V microcontroller GPIO pins. At 100 mA drive, the device safely controls indicator LEDs and low-power actuators without exceeding its thermal or electrical limits in SOT-323 packaging.
When should an engineer choose PDTC143XU over other NPN digital transistors in the PDTC series?
PDTC143XU is best chosen when the design needs a 4.7 kΩ input resistor combined with a 10 kΩ base-emitter resistor for 5 V logic interfacing with loads up to 100 mA at 50 V. Variants with lower input resistance suit lower supply voltages, while PDTC143XU fits standard 5 V logic GPIO drive levels. Engineers replacing discrete NPN plus 2 resistors in compact assemblies benefit most from the 3-pin SOT-323 format.
What package does PDTC143XU use and how does it compare to SOT-23 for high-density SMD placement?
PDTC143XU comes in a SOT-323 (UMT) package, which is smaller than the standard SOT-23, with a footprint of approximately 2.1 mm x 1.3 mm. This compact 3-pin outline allows pick-and-place assembly at high density on consumer electronics PCBs, and its low profile suits thin product enclosures. The small size combined with the internal 4.7 kΩ and 10 kΩ resistors reduces overall circuit area compared with equivalent discrete implementations.
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