Part Number: A1270
Function: 30V, 500mA, PNP Transistor
Package: TO-92 Type
Manufacturer: SEMTECH
Images:
Description
The A1270 is 30V, 500mA, PNP Silicon Epitaxial Planar Transistor. A PNP transistor is a type of bipolar junction transistor (BJT) with a different structure and polarity compared to an NPN transistor.
Here are characteristics of PNP transistors:
1. Structure: A PNP transistor has a sandwich-like structure, consisting of a thin N-type layer (base) sandwiched between two P-type layers (emitter and collector).
2. Polarity: In a PNP transistor, the majority charge carriers are holes, which flow from the emitter to the collector. The emitter is negative relative to the base, and the collector is positive relative to the base.
3. Current flow: When a small current is applied to the base terminal, it allows a much larger current to flow from the emitter to the collector. This is called amplification or gain, and it makes the PNP transistor useful as an electronic switch or amplifier.
Absolute maximum ratings ( Ta=25°C )
1. Collector to Base Voltage: Vcbo = – 35 V
2. Collector to Emitter Voltage: Vceo = – 30 V
3. Emitter to Base Voltage: Vebo = – 5 V
4. Collector Current: Ic = – 500 mA
5. Power Dissipation : Ptot = 500 mW
6. Junction Temperature: Tj = 150°C
7. Storage Temperature: Tsg = -55 ~ +150°C
The transistor is subdivided into two groups O and Y according to its DC current gain.
Applications:
1. Switching and general purpose
A1270 PDF Datasheet
