Question 1

What is 2N4031?

Accepted Answer

NPN Bipolar Transistor 2N4031

Question 2

What are the specifications of 2N4031?

Accepted Answer

Key specifications include: Type: NPN, Collector-Emitter Voltage, max: 80V, Collector-Base Voltage, max: 80V, Emitter-Base Voltage, max: 5V, Collector Current − Continuous, max: 1A, Collector Dissipation: 0.8W, DC Current Gain (hfe): 40to120, Transition Frequency, min: 400MHz, Operating and Storage Junction Temperature Range: -55 to +175°C, Package: TO-39

Question 3

What are equivalent components to 2N4031?

Accepted Answer

See the component details for equivalent parts.

2N4031 Transistor — Specifications & Equivalents

Key Specifications

Equivalent & Replacement Parts

Type	NPN
Collector-Emitter Voltage, max	80V
Collector-Base Voltage, max	80V
Emitter-Base Voltage, max	5V
Collector Current − Continuous, max	1A
Collector Dissipation	0.8W
DC Current Gain (hfe)	40to120
Transition Frequency, min	400MHz
Operating and Storage Junction Temperature Range	-55 to +175°C
Package	TO-39