MPSA92 Transistor: Pinout, Datasheet PDF and Equivalent

Avaq Semiconductor
2 min readOct 30, 2023

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MPSA92 Transistor Overview

The MPSA42 transistor is an NPN bipolar junction transistor designed for high voltage applications such as high voltage amplification and switching. With a collector-emitter (CE) voltage rating of 300 V, it can be utilized in situations where standard transistors, limited to lower collector-emitter voltages (e.g., 100 V), are unsuitable.

Moreover, the CE voltage characteristics of the MPSA42 transistor make it suitable for circuits prone to sudden voltage fluctuations. When the base terminal of this transistor is connected to ground (GND), the collector and emitter terminals are reverse-biased. Given its NPN configuration, the collector and emitter remain open (reverse-biased) when the base pin is grounded. Application of a signal to the base pin forward-biases the CE terminal or turns the transistor on.

The transistor’s gain value determines its amplification capability. Due to its relatively low gain value of 30, the MPSA42 is typically not chosen for amplification purposes.

It’s important to note that the MPSA42 transistor has a maximum collector current rating of 500 mA, making it unsuitable for driving loads exceeding 500 mA. To bias the transistor, a limited current of 5 mA is supplied to the base terminal. Once fully biased, it allows the maximum current (e.g., 500 mA) to flow through the emitter and collector terminals, operating in the saturation region.

The typical voltage supplied at the collector-base (CB) and collector-emitter (CE) terminals is 300 V. When the power supply to the base terminals is disconnected, the transistor switches off, which is referred to as the cutoff region.

MPSA92 Transistor Pinout

MPSA92 Transistor Features

This is a TO-92 package NPN transistor designed for high-voltage applications. It operates effectively within a temperature range of -55°C to +150°C, making it suitable for both extreme cold and hot environments.

The transistor is of NPN type and features a DC gain range between minimum and maximum values of 40, providing amplification capabilities for various electronic applications.

With a maximum collector current rating of 500mA, it can handle substantial current loads without exceeding its limits. It also exhibits a maximum conversion frequency of 50MHz, making it capable of swift signal processing.

The collector-emitter voltage can reach a maximum of 300V, which is ideal for high-voltage scenarios, and the transistor can handle a maximum collector dissipation of 625mW.

In addition, the collector-base voltage is rated at a maximum of 300V, while the emitter-base voltage should not exceed 6V, ensuring safe and stable operation in different circuit configurations.

In summary, this is a high-voltage NPN transistor encapsulated in a TO-92 package, known for its temperature resilience, moderate DC gain, and excellent current-handling capabilities, with a focus on high-voltage applications.

MPSA92 Transistor Datasheet

Download MPSA92 datasheet here>>

MPSA92 Transistor Equivalent

MMBTA42、KST42 and PZTA42.

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Avaq Semiconductor

Avaq Semiconductor Co., Limited was established in Hong Kong in 2013 and is a global semiconductor electronic components supply chain company. Web: www.avaq.com