Transistor BC108

Transistor BC108 NPN, 0.2A TO-18

Transistors

Reference: TRBC108

Part.No: BC108

€0.50

Upon Request

Delivered within 2-3 days

The BC108 is a classic NPN Bipolar Junction Transistor (BJT) in a metal TO-18 package. A well-known general-purpose small-signal transistor used in amplification and switching circuits.

Add to cart

Subscribe To When In Stock

You have successfully subscribed to this product

Description
Product Details

BC108 Small Signal Transistor - Reliable NPN in Metal TO-18 Case

The BC108 is a classic NPN small-signal transistor housed in a metal TO-18 package, widely used in vintage and modern audio, switching and general-purpose analog circuits. Its high current gain and solid frequency response make it a dependable choice for both repair work on legacy equipment and new hobbyist builds.

Functions & Applications

High Current Gain (hFE up to 200): Provides efficient amplification of weak signals.
Metal TO-18 Package: Rugged construction with good thermal handling and shielding compared to plastic cases.
150MHz Transition Frequency: Suitable for RF and higher-speed switching applications.
Classic Compatibility: A drop-in choice for repairing vintage audio and industrial equipment designed around this legacy part.

Technical Specifications

Parameter	Value / Specification
Transistor Type	BJT (Bipolar Junction Transistor)
Polarity / Channel	NPN
Package / Case	TO-18
Collector-Emitter Voltage (Vceo)	25V
Max Collector Current (Ic)	200mA
Power Dissipation (Pd)	600mW
Transition Frequency (ft)	150MHz
DC Current Gain (hFE)	up to 200
Mounting Type	Through-Hole (THT)

Frequently Asked Questions

Q: What is the complementary PNP part for BC108?
A: The commonly used complementary PNP transistor is the BC178 or BC212, depending on the specific hFE grouping required.

Q: Can the BC108 replace a BC107 or BC109 in an existing circuit?
A: Yes, the BC107, BC108 and BC109 share the same TO-18 package and electrical ratings, differing mainly in hFE grouping, so they are generally interchangeable in most designs.

Notes

This is a classic legacy transistor commonly used to repair vintage audio and industrial equipment; newer designs may prefer modern equivalents like the BC547.

Note: Price refers to one (1) piece. The component is shipped in bulk without individual packaging.

Transistor Type: BJT (Bipolar Junction Transistor)
Transistor Polarity / Channel: NPN
Transistor Case Style: TO-18

16 other products in the same category:

Transistor 2SA222

Transistors

Transistor 2SA222

Reference:

TR2SA222

Last items in stock

Power Transistor BD243 NPN, 6A TO-220

Transistors

Power Transistor BD243 NPN, 6A TO-220

Reference:

TRBD243

The BD243 is a high-current NPN Power Transistor in a TO-220 package, engineered for audio power amplifiers, voltage regulators, and motor control circuits. Renowned for reliability and thermal stability in demanding applications.

Last items in stock

Transistor JFET BF245 N-Channel

Transistors

Transistor JFET BF245 N-Channel

Reference:

TRBF245

The BF245 (often A, B, or C) is arguably the most famous N-Channel JFET in Europe. Plastic TO-92 package.

Last items in stock

Transistor 2SA1015

Transistors

Transistor 2SA1015 PNP, 150mA TO-92

Reference:

TR2SA1015

The 2SA1015 is a general-purpose PNP Bipolar Junction Transistor (BJT) in a TO-92 package. Designed for driver-stage audio frequency amplification and low-power switching, it is the classic complementary pair to the NPN 2SC1815.

In Stock

Transistor BC143 silicon PNP

Transistors

Transistor BC143 PNP, 1A TO-39

Reference:

TRBC143

The BC143 is a PNP silicon planar epitaxial transistor in a metal TO-39 package, originally designed as a driver-stage transistor for high-power audio amplifiers.

In Stock

Transistor BF195 NPN, RF/IF TO-92

Transistors

Transistor BF195 NPN, RF/IF TO-92

Reference:

TRBF195

The BF195 is a classic NPN Bipolar Junction Transistor (BJT) in a TO-92 package, optimized for RF and IF applications. Widely used in radio receivers as an oscillator, mixer, or IF amplifier stage, the BF195 delivers low-capacitance performance ideal for high-frequency circuits.

In Stock

Transistor 2N2368

Transistors

Transistor 2N2904 PNP TO-39

Reference:

TR2N2904

The 2N2904 is a PNP Bipolar Junction Transistor (BJT) in a metal-can TO-39 package. Designed for high-speed saturated switching and general-purpose amplification in audio, driver and analog control circuits.

In Stock

Power Transistor BD538 PNP, 4A TO-220

Transistors

Power Transistor BD538 PNP, 4A TO-220

Reference:

TRBD538

The BD538 is a PNP Power Bipolar Junction Transistor (BJT) in a TO-220 package. Built for reliable linear amplification and fast switching in power supply circuits, audio amplifiers, and industrial load-switching applications.

Last items in stock

Transistor BD138 PNP, 60V, 1.5A, 12.5W, TO-126

Transistors

Power Transistor BD138 PNP, 1.5A TO-126

Reference:

TRBD138

The BD138 is a PNP power BJT in a TO-126 package, rated for 60V/1.5A. Commonly used as a driver or output stage transistor in audio amplifiers, power regulators and motor control circuits.

Upon Request

Transistor AC127K NPN Germanium, 0.5A TO-1

Transistors

Transistor AC127K NPN Germanium, 0.5A TO-1

Reference:

TRAC127K

The AC127K is a germanium NPN transistor in a TO-1 heatsink-block package, designed for audio amplifier stages and vintage electronics repair where extra thermal stability is needed.

In Stock

Transistor BF127 NPN RF TO-7

Transistor BF127 NPN RF TO-7 2

Transistors

Transistor BF127 NPN RF TO-7

Reference:

TRBF127

The BF127 is an NPN Silicon RF/IF transistor in a TO-7 metal can package, designed for high-frequency amplification in radio receivers and tuner stages.

Last items in stock

Power Transistor BU408 NPN, 8A TO-220

Transistors

Power Transistor BU408 NPN, 8A TO-220

Reference:

TRBU408

The BU408 is a high-voltage NPN power transistor in a TO-220 package, specifically designed for horizontal deflection (LOPT) circuits in CRT monitors, arcade displays and vintage television sets. Its fast switching speed and robust construction make it ideal for demanding retrace applications.

In Stock

Power Transistor BU208A NPN, 1500V TO-3

Transistors

Power Transistor BU208A NPN, 1500V TO-3

Reference:

TRBU208A

The BU208A is a high-voltage NPN power transistor in a TO-3 package, designed specifically for CRT deflection and flyback (LOPT) applications. It withstands peak voltages up to 1500V and has been the industry standard for television line output stages for decades.

In Stock

Transistor BC369 PNP, 20V, 1A, 800mW, TO-92

Transistors

Transistor BC369 PNP, 1A TO-92

Reference:

TRBC369

The BC369 is a PNP Darlington transistor in a TO-92 package, combining two BJT stages internally for very high current gain. Ideal for driving relays, motors and lamps directly from low-current control signals.

In Stock

Transistor 2SC2236 NPN, 1.5A TO-92

Transistors

Transistor 2SC2236 NPN, 1.5A TO-92

Reference:

TR2SC2236

The 2SC2236 is a high-current NPN Bipolar Junction Transistor (BJT) in a TO-92 package. Engineered for driving relays, motors and other moderate-power loads in switching applications.

In Stock

Transistor S8050

Transistors

Transistor S8050 NPN, 0.7A TO-92

Reference:

TRS8050

The S8050 is a low-voltage, high-current NPN Bipolar Junction Transistor (BJT) in a TO-92 package. Popular for Class-B push-pull audio amplifiers, relay/LED driving and general-purpose switching in Arduino and DIY circuits.

In Stock

Product added to wishlist

Product added to compare.