2N3904 General Purpose Transistors NPN TO-92 - Datasheet

Q: What are the absolute maximum ratings for the 2N3904?

The datasheet lists maximum collector-emitter voltage (VCEO), collector-base voltage (VCBO), emitter-base voltage (VEBO), continuous collector current (IC), power dissipation (PD), and operating/storage junction temperature range (Tj, Tstg). It also provides thermal resistances from junction to case and junction to ambient.

Q: What is the pin configuration of the TO-92 package?

The document states pin 1 is Collector, pin 2 is Base, and pin 3 is Emitter for the TO-92 package.

Q: Which switching and high-frequency parameters are provided?

Small signal characteristics include transition frequency (fT) and various capacitances. Switching timing values such as delay time (td), storage time (ts), and rise/fall times (tr, tf) are included under switching time descriptions and pulse conditions.

Nov 1, 2026

Uploaded by Jordan Avery

NPN silicon planar switching transistor datasheet for 2N3904 in a TO-92 plastic package. Provides mechanical dimensions in millimetres, pin configuration (collector, base, emitter), and absolute maximum ratings including voltage, current, power dissipation, and junction temperature range. Includes electrical characteristics at Ta = 25°C such as DC parameters, gain (hFE), saturation voltages, cutoff currents, and switching/small-signal characteristics (fT, capacitances, delay, rise, storage, fall time) plus typical noise figure.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages4

Reading Time10 min

AccessFree to download

Overview

Package and Pin Configuration

Dimensions

Absolute Maximum Ratings

Electrical Characteristics

DC Characteristics

Small Signal and Switching Characteristics

Specifications and Notes

2N3904 General Purpose Transistors NPN TO-92 High Speed Switching Features: • NPN Silicon Planar Switching Transistors. • Fast switching devices exhibiting short turn-off and low saturation voltage characteristics. • General purpose Switching and Amplifier Applications. TO-92 Plastic Package | Dimensions | Minimum | Maximum | | --- | --- | --- | | A | 4.32 | 5.33 | | B | 4.45 | 5.20 | | C | 3.18 | 4.19 | | D | 0.41 | 0.55 | | E | 0.35 | 0.50 | | F | 5° | | | G | 1.14 | 1.40 | | H | | 1.53 | | K | 12.70 | | Dimensions : Millimetres Pin Configuration 1. Collector 2. Base 3. Emitter 2N3904 General Purpose Transistors NPN TO-92 Absolute Maximum Ratings | Description | Symbol | Value | Unit | | --- | --- | --- | --- | | Collector-Emitter Voltage | V CEO | 40 | V | | Collector-Base Voltage | VCBO | 60 | | | Emitter-Base Voltage | VEBO | 6.0 | | | Collector Current Continuous | IC | 200 | mA | | Power Dissipation at Ta = 25°CDerate above 25°C | PD | 625
5.0 | mW
mW/°C | | Power Dissipation at Tc= 25°CDerate above 25°C | PD | 1.5
12 | W
mW/°C | | Operating and Storage JunctionTemperature Range | Tj, Tstg | -55 to +150 | °C | | Thermal Resistance | | | | | Junction to Case | Rth(j-c) | 83.3 | °C/W | | Junction to Ambient | Rth(j-a) | 200 | | Electrical Characteristics (Ta = 25°C unless otherwise specified) | Description | Symbol | Test Condition | 2N3904 | Unit | | --- | --- | --- | --- | --- | | Collector-Emitter Voltage | *V CEO | IC = 10mA, IB = 0 | >40 | V | | Collector-Base Voltage | VCBO | IC = 10µA, IE = 0 | >60 | | | Emitter-Base Voltage | VEBO | IE = 10µA, IC = 0 | >6.0 | | | Collector-Cutoff Current | ICEX | VCE = 30V, VEB = 3V | <50 | nA | | Base Current | IBL | | <50 | | | DC Current Gain | *h FE | IC = 0.1mA, VCE = 1VIC = 1mA, VCE = 1V
IC = 10mA, VCE = 1V
IC = 50mA, VCE = 1V
IC = 100mA, VCE = 1V | >40
>70
100-300
>60
>30 | - | | Collector Emitter Saturation Voltage | *VCE(sat) | IC = 10mA, IB = 1mA
IC = 50mA, IB = 5mA | <0.20
<0.30 | V
V | | Base Emitter Saturation Voltage | *VBE(sat) | | 0.65-0.85
<0.95 | | Page 2 31/05/05 V1 .0 2N3904 General Purpose Transistors NPN TO-92 Electrical Characteristics (Ta = 25°C unless otherwise specified) Small Signal Characteristic | Description | Symbol | Test Condition | 2N3904 | Units | | --- | --- | --- | --- | --- | | Transistors Frequency | fT | IC = 10mA, VCE = 20V, f = 100MHz | >300 | MHz | | Output Capacitance | Cob | V CB = 5V, IE = 0, f = 1MHz | <4.0 | pF | | Input Capacitance | C ib | V BE = 0.5V, IC = 0, f = 1MHz All f = kHz | <8.0 | | | Small Signal Current Gain | h fe | IC = 1mA, VCE = 10V | 100-400 | - | | Input Impedance | hie | | 1.0-10 | kΩ | | Output Admittance | hoe | | 1.0-40 | umhos | | Voltage Feedback Ratio | hre | | 0.5-0.8 | x10-4 | | Noise Figure | NF | IC = 100µA, VCE = 5V | <5.0 | dB | | Switching Time | | | | | | Delay Time | td | V CC = 3V, V BE = 0.5V | <35 | ns | | Rise Time | tr | IC = 10mA, IB1 = 1mA | | | | Storage time | ts | V CC = 3V, IC = 10mAIB1 = IB2 = 1mA | <200 | | | Fall Time | tf | - | <50 | | *Pulse Condition: = 300µs, Duty Cycle = 2% Specifications | V CEO
maximum
(V) | IC
maximum
(A) | VCE(sat)
maximum
(V)
at IC = 10mA | t off
maximum
(ns)
at IC = 10mA | h FE
minimum
at IC = 10mA | Ptot
at 25°C
(mW) | Package
and
Pin Out | Part Number | | --- | --- | --- | --- | --- | --- | --- | --- | | 40 | 0.2 | 0.2 | 250 | 100 | 500 | TO-92 | 2N3904 | 2N3904 General Purpose Transistors NPN TO-92 Notes: International Sales Offices: AUSTRALIA – Farnell InOne Tel No: ++ 61 2 9645 8888 Fax No: ++ 61 2 9644 7898 AUSTRIA – Farnell InOne Tel No: ++ 43 662 2180 680 Fax No: ++ 43 662 2180 670 BELGIUM – Farnell InOne Tel No: ++ 32 3 475 2810 Fax No: ++ 32 3 227 3648 BRAZIL – Farnell-Newark InOne Tel No: ++ 55 11 4066 9400 Fax No: ++ 55 11 4066 9410 CHINA – Farn

FAQs

What are the absolute maximum ratings for the 2N3904?

The datasheet lists maximum collector-emitter voltage (VCEO), collector-base voltage (VCBO), emitter-base voltage (VEBO), continuous collector current (IC), power dissipation (PD), and operating/storage junction temperature range (Tj, Tstg). It also provides thermal resistances from junction to case and junction to ambient.

What is the pin configuration of the TO-92 package?

The document states pin 1 is Collector, pin 2 is Base, and pin 3 is Emitter for the TO-92 package.

Which switching and high-frequency parameters are provided?

Small signal characteristics include transition frequency (fT) and various capacitances. Switching timing values such as delay time (td), storage time (ts), and rise/fall times (tr, tf) are included under switching time descriptions and pulse conditions.

Nov 1, 2026

Uploaded by Jordan Avery