A1274 PDF – (-80V), PNP Transistor – KTA1274 – KEC

This post describes for the PNP transistor.

The Part Number is A1274, KTA1274.

The function of this semiconductor is 80V, 400mA, PNP Transistor.

The package is TO-92L Type

The manufacturer of this part is KEC.

See the preview image and the PDF file for more information.

A1274 pdf datasheet pinout


A A1274 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:

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).

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.

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.


1. Complementary to KTC3227.

Maximum Ratings (Ta=25°C)

1. Collector-Base Voltage: Vcbo = -80 V
2. Collector-Emitter Voltage: Vceo = -80 V
3. Emitter Base Voltage: Vebo = -5 V
4. Collector Current :  Ic = -400 mA
5. Emitter Current : Ie = 400 mA
6. Collector Power Dissipation : Pc = 1 W


General Purpose.

A1274 PDF Datasheet

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