Overview
The PDTB143ETR is a compact PNP resistor-equipped transistor (RET) designed to simplify biasing networks, reduce external components, and minimize PCB space. Featuring a built-in bias resistor network and a 50 V collector-emitter voltage rating, the device is well suited for general-purpose switching, digital signal control, and low-power load management. Its SOT-23 (TO-236AB) surface-mount package and 500 mA collector current capability make it a highly efficient choice for compact embedded systems and automotive-grade applications.
Core Parameters
| Parameter | Specification |
|---|---|
| Transistor Type | PNP, Resistor-Equipped Transistor |
| VCEO (Collector-Emitter Voltage) | 50 V |
| IC (Continuous Collector Current) | 500 mA |
| Built-in Bias Resistors | R1 = 4.7 kΩ, R2 = 4.7 kΩ |
| Total Power Dissipation | 320 mW (Tamb ≤ 25°C, standard PCB) |
| Junction Temperature | Up to 175°C |
| Operating Temperature Range | –55°C to +175°C |
| Package | SOT-23 (TO-236AB) |
Features
- Integrated bias resistor network (4.7 kΩ / 4.7 kΩ) eliminates need for external biasing
- 50 V VCEO rating suitable for a wide range of low-power switching tasks
- 500 mA collector current capability supports moderate loads
- Compact SOT-23 package ideal for dense PCB layouts
- AEC-Q101 qualified for automotive and industrial reliability
- Reduces BOM cost and PCB footprint versus discrete PNP + resistor designs
- Excellent thermal performance with a maximum junction temperature of 175°C
Typical Application Scenarios
| Application | Why PDTB143ETR Fits |
|---|---|
| Logic Signal Inversion | Built-in resistors simplify level shifting and logic control |
| Low-Power Load Switching | 50 V / 500 mA capability handles typical embedded loads |
| Microcontroller Interface | Reduces external components for control or buffering circuits |
| Automotive Digital Switching | AEC-Q101 qualification ensures reliability in harsh environments |
| IoT & Compact Devices | SOT-23 footprint provides space savings for small PCB designs |
| General Digital Control | RET design minimizes BOM and accelerates design integration |
Performance Comparison
| Specification | PDTB143ETR | Standard PNP Transistor + External Resistors | General PNP Transistor |
|---|---|---|---|
| Built-in Bias Network | Yes (4.7 kΩ / 4.7 kΩ) | No | No |
| VCEO | 50 V | 40–50 V | 40–45 V |
| Collector Current | 500 mA | Depends on transistor | ~100–500 mA |
| Component Count | 1 device | 3 components | 1 device + required resistors |
| PCB Area | Very small | Medium | Medium |
Conclusion
The PDTB143ETR is an efficient and compact PNP resistor-equipped transistor ideal for designers seeking to reduce component count, improve PCB density, and maintain reliable switching performance. With 50 V voltage capability, 500 mA collector current, AEC-Q101 qualification, and integrated bias resistors, it is a strong fit for automotive electronics, embedded systems, digital logic control, and general low-power switching applications.
Manufacturer Profile
Nexperia is a global leader in discrete semiconductors, MOSFETs and logic devices. Their resistor-equipped transistor families are widely adopted in automotive, industrial, consumer, and high-volume production environments due to their reliability, small footprint and robust electrical performance.
For more information and to review our available inventory, please contact our team for detailed pricing, current stock levels, and any additional technical support you may need.
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