PDTC144WU Nexperia Integrated Circuit (SOT23 (3-Pin)) In Stock
Nexperia PDTC144WU is an NPN digital transistor with a built-in 47 kΩ base resistor and 0.47 resistor ratio, rated at 100 mA collector current and 50 V collector-emitter voltage. Housed in a compact 3-pin UMT (SOT-323) package with minimum hFE of 60, it simplifies switching design by eliminating external bias components. Available from stock with worldwide shipping.
- Manufacturer
- Nexperia
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- PDTC144WU Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- NPN digital transistor with integrated 47 kΩ bias resistor and 0.47 R1/R2 ratio, eliminating external base network components
- 100 mA collector current and 50 V VCEO rating cover a wide range of low-power signal switching applications
- Minimum hFE of 60 ensures reliable saturation from low-current GPIO or logic gate drive signals
- Ultra-compact 3-pin UMT/SOT-323 package reduces PCB footprint versus standard SOT-23 in space-critical designs
Applications
The PDTC144WU is used in microcontroller-driven switch circuits where an NPN transistor must be driven directly from a GPIO output without external resistors, such as LED array drivers, relay coil switches, and logic-level signal inverters. Its 47 kΩ built-in base resistor suits designs where the drive source operates at 3.3 V or 5 V with limited source current capability. The 50 V VCEO rating also makes it appropriate for open-collector interface lines and low-voltage solenoid switching in consumer and industrial electronics.
Specifications
| Date Of Intro | 1997-09-16 |
| YTEOL | 7 |
| Additional Feature | BUILT-IN BIAS RESISTOR RATIO IS 0.47 |
| Collector Current-Max (IC) | 0.1A |
| Collector-Emitter Voltage-Max | 50V |
| Configuration | SINGLE WITH BUILT-IN RESISTOR |
| DC Current Gain-Min (hFE) | 60 |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity/Channel Type | NPN |
| Surface Mount | YES |
| Terminal Finish | TIN |
| Terminal Form | GULL WING |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transistor Application | SWITCHING |
| Transistor Element Material | SILICON |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What built-in resistor value and ratio does the PDTC144WU provide, and how does this simplify GPIO switching circuit design?
The PDTC144WU integrates a 47 kΩ base resistor with a 0.47 resistor ratio (R1/R2), so a microcontroller GPIO driving 3.3 V or 5 V can directly control the transistor without any external base resistor. This integrated biasing eliminates at least 1 passive component per switch stage, reducing PCB area, BOM count, and placement time in high-density designs with multiple switched outputs.
What are the collector current and voltage ratings of PDTC144WU, and what load types can it switch reliably?
The PDTC144WU is rated for a maximum collector current (IC) of 100 mA and a collector-emitter voltage (VCEO) of 50 V. These specifications allow it to switch LEDs drawing up to 100 mA, small relay coils with 12 V to 48 V coil voltages, and open-collector bus pull-up resistors on lines with supply rails up to 50 V, covering the majority of low-power NPN switching applications in embedded designs.
How does the PDTC144WU's minimum hFE of 60 determine the minimum base drive current needed for full saturation?
With hFE of at least 60 and a maximum collector load of 100 mA, the base current required for saturation is at most 100 mA / 60 = approximately 1.7 mA. The 47 kΩ integrated base resistor limits base current to roughly 70 µA at 3.3 V drive (3.3 V / 47 kΩ), which is sufficient to saturate the transistor for collector currents up to about 4 mA, making the PDTC144WU ideal for very light loads like indicator LEDs driven from high-impedance GPIO pins.
When should a designer choose PDTC144WU over PDTC143Z or PDTC144ET in a 3.3 V GPIO-controlled LED driver circuit?
PDTC144WU uses a higher 47 kΩ base resistor compared to PDTC143Z (4.7 kΩ) and PDTC144ET (47 kΩ with a different package), drawing only about 70 µA from a 3.3 V GPIO versus approximately 700 µA for PDTC143Z. For MCUs with GPIO source current limits of 100 to 200 µA per pin, the PDTC144WU is the safer choice, while PDTC143Z is better when driving heavier loads requiring higher base overdrive for fast switching with collector currents near 100 mA.
Related Guides
1.5KE Series TVS Diode EOL Cross-Reference and Equivalent Replacements
Cross-reference guide for EOL 1.5KE TVS diodes (1.5KE15A, 1.5KE36A, 1.5KE200A, 1.5KE100CA). Match standoff voltage, polarity, and 1500W rating to find active equivalents.
Jun 16, 2026
Microchip Serial EEPROM NRND Cross-Reference Guide: 25LC080, 25AA640, 25AA080, 24C08 to Active Equivalents
Cross-reference guide for Microchip NRND serial EEPROMs: 25LC080, 25AA640, 25AA080A (SPI) and 24C08B (I2C) to active A/B-revision drop-in replacements.
Jun 16, 2026
1N5817 / 1N5820 / 1N5822 Schottky Diode Cross-Reference: Active Drop-In Replacements
Find active drop-in replacements for obsolete 1N5817, 1N5820, and 1N5822 Schottky rectifiers. Compare specs, cross-reference table, and sourcing tips.
Jun 16, 2026
ADSP-2147x SHARC DSP Selection Guide: How to Choose the Right Variant for Your Audio Design
Compare ADSP-21477, ADSP-21478, and ADSP-21479 SHARC+ DSP variants by clock speed, memory, package, and temperature grade to find the right fit for your audio DSP design.
Jun 16, 2026
Why Buy from FindMyChip
About Nexperia
Nexperia is a leading electronic component manufacturer. FindMyChip sources Nexperia ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”