PDTC124XU Nexperia Integrated Circuit (SOT23 (3-Pin)) In Stock
Nexperia PDTC124XU is an NPN digital transistor with built-in 22 kΩ bias resistors, 100 mA collector current, and 50 V collector-emitter voltage in a compact 3-pin UMT package. It simplifies interface circuit design by eliminating external base resistors. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Nexperia
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- PDTC124XU Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Built-in 22 kΩ bias resistors with 2.1 resistor ratio eliminate external components and reduce BOM count
- 100 mA collector current at 50 V VCE in a compact 3-pin UMT package for high-density switching circuits
- Minimum hFE of 80 ensures reliable saturation switching from low-drive microcontroller GPIO outputs
Applications
The PDTC124XU is used in LED driver circuits, relay switching stages, and logic-level interface buffers where an NPN transistor must be driven directly from a microcontroller GPIO without an external base resistor. Its built-in 22 kΩ bias resistors allow operation from 3.3 V and 5 V logic signals up to the 50 V collector-emitter rating. It is also used in power management IC enable circuits and general-purpose digital switching applications in consumer and industrial electronics.
Specifications
| Date Of Intro | 1999-05-18 |
| YTEOL | 7 |
| Additional Feature | BUILT-IN BIAS RESISTOR RATIO IS 2.1 |
| Collector Current-Max (IC) | 0.1A |
| Collector-Emitter Voltage-Max | 50V |
| Configuration | SINGLE WITH BUILT-IN RESISTOR |
| DC Current Gain-Min (hFE) | 80 |
| 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 values does PDTC124XU include and how do they simplify circuit design?
PDTC124XU integrates 22 kΩ input bias resistors with a 2.1 ratio, allowing direct connection to 3.3 V or 5 V microcontroller GPIO pins without external components. This reduces PCB footprint, lowers component count by 2 passive parts per transistor stage, and eliminates base resistor calculation errors in switching circuit designs.
What is the maximum collector current and voltage rating of PDTC124XU for switching applications?
PDTC124XU supports up to 100 mA collector current and 50 V collector-emitter voltage, suitable for driving LEDs, small relays, and optocoupler inputs. Its minimum DC current gain of 80 hFE ensures reliable saturation from GPIO drive currents as low as 1 mA, reducing system power consumption.
How does the UMT 3-pin package of PDTC124XU compare to larger SOT-23 packages in space-constrained designs?
The 3-pin UMT package is smaller than standard SOT-23, with a footprint of approximately 2.0 mm x 2.1 mm versus 2.9 mm x 1.3 mm for SOT-23. This compact outline is preferred in wearable electronics and mobile devices where space savings of 30% or more per transistor position matter for overall PCB area reduction.
When is PDTC124XU a better choice than a discrete NPN transistor for an LED switching circuit?
PDTC124XU is preferred when the design must operate directly from a 3.3 V GPIO without calculating and placing a separate 10 kΩ to 22 kΩ base resistor. Since the bias resistors are internal, the designer places one 3-pin device instead of two components, saving approximately 0.5 mm2 of board area per switching channel in high-channel-count LED matrix drivers.
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