78L33 Datasheet – 3.3V, Positive Voltage Regulator

This post explains for the semiconductor 78L33.

The Part Number is 78L33.

The function of this semiconductor is Positive voltage regulators.

Manufacturers : STMicroelectronics


78L33 Regulator

Description :

The L78L series of three-terminal positive regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heat-sink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or oncard regulation for elimination of noise and distribution problems associated with single-point regulation. In addition, they can be used with power pass elements to make high-current
voltage regulators. The L78L series used as Zener diode/resistor combination replacement, offers e improvement along with lower quiescent current and lower noise.

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78L33 image



1. Output current up to 100 mA
2. Output voltages of 3.3 V thermal overload protection
3. Short-circuit protection
4. No external components are required



78L33 Datasheet

A1413 Datasheet – 2SA1413, PNP Transistor – NEC

This post explains for the semiconductor A1413, 2SA1413.

The function of this semiconductor is PNP Transistor.

The package is TO-251 Type.

Manufacturers : NEC

Preview images :

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A1413 image

Description :

A1413 is designed for High Voltage Switching, especially in Hybrid Integrated Circuits.

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage : Vcbo = – 600V
2. Collector to Emitter Voltage : Vceo = – 600 V
3. Emitter to Base Voltage : Vebo = – 7 V
4. Collector Current : Ic = – 1.0 A
5. Total Dissipation : Pt = 10 W
6. Junction Temperature : Tj = 150°C
7. Storage Temperatue : Tsg = -55 ~ +150°C



A1413 transistor

A1413 Datasheet