Transistor C5198 is a silicon NPN power transistor designed primarily for audio frequency power amplification and high-fidelity power output stages.
Part Number: 2SC5198
Function: NPN Transistor ( Vceo = 140V min, Ic = 10A )
Package: TO-3PN Type
Manufacturer: Toshiba
See the preview image and the PDF file for more information.
Image
Description
This is 140V, 10A, Silicon NPN Triple Diffused Type Transistor.
The C5198 is a bipolar junction transistor (BJT) made by various electronics companies such as Toshiba and Sanyo. It is a NPN transistor that is typically used for audio amplification and switching applications. The 2SC5198 is commonly used in audio amplifier circuits, as well as in power amplifier stages and preamplifiers.
Features
- Type: NPN Bipolar Junction Transistor
- VCEO: 140V
- IC: 10A
- PC: 100W (Tc = 25°C)
- Complementary Pair: 2SA1941 (PNP)
- Construction: Triple Diffused (improves gain and ruggedness)
C5198 pinout
Absolute Maximum Ratings (Ta= 25°C)
1. Collector-base voltage : VCBO = 140 V
2. Collector-emitter voltage : VCEO = 140 V
3. Emitter-base voltage : VEBO = 5 V
4. Collector current : IC = 10 A
5. Base current : IB = 1 A
6. Collector power dissipation (Tc= 25°C) : PC = 100 W
7. Junction temperature : Tj = 150 °C
Typical Usage Example
- Used as output transistor in Class AB amplifier
- Paired with 2SA1941 for complementary symmetry
- Mounted on large heat sink for thermal stability
Design Notes (Critical Points)
- Heat sinking is mandatory (100W dissipation capability)
- Use emitter resistors (~0.22Ω) for current sharing and stability
- Ensure proper biasing to avoid crossover distortion
- Check SOA when used in linear region
- Include protection circuits (speaker protection, overcurrent)
Typical Applications
- Audio power amplifier output stages
- Hi-Fi stereo amplifiers
- High-current driver circuits
- Linear power regulators
- General-purpose power switching
Alternative / Equivalent Products
- 2SC5200 (higher power variant)
- TIP3055 (general-purpose alternative)
- MJL3281A (high-end audio transistor)
- 2SC2922 (premium audio grade)
C5198 Datasheet PDF
