PDTA124TT Nexperia Integrated Circuit (SOT23 (3-Pin)) In Stock
Nexperia PDTA124TT is a PNP digital transistor with integrated 22 kΩ bias resistors rated 100 mA, 50 V in a 3-pin SOT23 package. Eliminates external base resistors and simplifies PCB layout. Suited for LED driving, signal switching, and microcontroller load control applications.
- Manufacturer
- Nexperia
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- PDTA124TT Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- PNP digital transistor with integrated dual 22 kΩ bias resistors eliminating external components for circuit simplification
- 100 mA continuous collector current and 50 V VCEO rating for driving LEDs, relays, and small loads
- 3-pin SOT23 (TO-236AB) package for compact PCB integration with minimal board space consumption
- Logic-level compatible with 3.3 V and 5 V microcontroller I/O for direct switching without additional buffer stages
Applications
The PDTA124TT is commonly used for logic-level switching in microcontroller-driven LED indicators, relay drivers, and small load control circuits where the built-in 22 kΩ biasing resistors eliminate external components. Its PNP configuration with integrated base resistors simplifies high-side switching of 5 V to 50 V loads from 3.3 V I/O lines in IoT devices, consumer electronics, and industrial controllers. The compact SOT23 package is ideal for PCB designs where component density is critical.
Specifications
| Date Of Intro | 2017-02-01 |
| YTEOL | 7 |
| Package | SOT23 (3-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| Country of Origin | Mainland China, Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the maximum collector current and voltage ratings of the PDTA124TT digital transistor?
The PDTA124TT is a PNP transistor rated for 100 mA continuous collector current and a maximum collector-emitter voltage (VCEO) of 50 V. These ratings make it suitable for switching LEDs, small relays, and signal lines in 3.3 V to 50 V circuits without additional buffer transistors.
How do the integrated bias resistors in PDTA124TT simplify circuit design compared to a plain PNP transistor?
The PDTA124TT integrates a 22 kΩ resistor at the base input and a 22 kΩ resistor between base and emitter, eliminating 2 external components. A 3.3 V or 5 V microcontroller can drive the transistor directly through a single I/O pin without calculating or placing separate biasing resistors on the PCB.
For a high-side LED driver circuit, how does PDTA124TT perform at 3.3 V logic levels?
At a 3.3 V input, the PDTA124TT's integrated 22 kΩ base resistors set the base current to drive the PNP transistor into saturation, switching up to 100 mA through the LED load. This allows direct connection from a 3.3 V GPIO without external components, saving PCB space and reducing bill-of-materials cost in compact IoT and wearable designs.
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