Genuine Motorola 2N5190 NPN General Purpose Transistor for Radio Circuit Applications
The Motorola 4880182D46 is a reliable 2N5190 NPN transistor designed for professional repair and maintenance of Motorola radio equipment. This genuine OEM semiconductor component provides dependable amplification and switching in various radio circuits including audio amplifiers, driver stages, and general-purpose applications. The TO-126 through-hole package with heatsink mounting tab offers excellent thermal dissipation for moderate power applications.
Key Features
- Genuine Motorola factory replacement part - ensures exact specifications and reliable performance
- 2N5190 industry-standard NPN transistor designation
- TO-126 package with integrated heatsink mounting tab for thermal management
- Medium power handling capability for driver and amplifier stages
- Wide range of applications from audio to RF circuits
- Three-terminal configuration for versatile circuit designs
- Robust construction for long service life in demanding radio environments
Compatible Models
- Various Motorola commercial and professional two-way radio models
- Used in audio amplifiers, driver stages, switching circuits, and general-purpose applications
- Consult your radio's service manual or schematic diagram for exact component location
What's Included
- One (1) Motorola 2N5190 NPN transistor
Application and Installation
Professional Installation Required: This through-hole transistor requires proper soldering technique and, in some applications, adequate thermal management. Installation should only be performed by qualified electronics technicians or certified Motorola service centers with experience in transistor replacement and radio repair. Improper installation can result in component failure, reduced performance, or damage to other radio components.
The 2N5190 is a versatile NPN transistor commonly used in audio output stages, pre-driver and driver circuits for RF power amplifiers, switching applications, voltage regulation circuits, and general-purpose amplification. The TO-126 package provides a good balance between compact size and thermal capability, making it suitable for applications requiring moderate power dissipation with heatsinking.
Thermal Management: For applications involving significant power dissipation, the transistor's metal mounting tab should be properly attached to a heatsink using appropriate thermal interface material. Ensure good thermal contact between the tab and heatsink surface. Secure with proper mounting hardware and torque specifications. In lower-power applications, the transistor may operate without additional heatsinking, but verify temperature remains within safe limits during extended operation.
Critical Installation Notes: Before installation, verify the transistor pinout matches the PCB layout. The three leads correspond to emitter, base, and collector terminals in the standard TO-126 configuration. Ensure proper ESD protection during handling, as transistors are sensitive to static discharge. Solder leads quickly to avoid overheating the component. After installation, verify proper bias voltages and current levels according to the service manual specifications.
When replacing a failed transistor, always investigate the cause of failure. Check associated biasing components, coupling capacitors, load circuits, and power supply voltages for proper operation. Failed transistors often indicate problems in other circuit areas that must be corrected to prevent repeated failures.
When to Replace
Transistors can fail due to overvoltage, excessive current, thermal damage, or electrical overstress. Symptoms of 2N5190 failure include no output signal, weak or distorted audio, reduced gain, excessive heat generation, or complete circuit malfunction. Common failure modes include collector-emitter short, open junctions, or degraded gain characteristics. Replace if the transistor shows signs of physical damage, excessive heat discoloration, or fails electrical testing.
Technical Specifications
- Type: NPN General Purpose Transistor
- Part Number: 2N5190
- Package: TO-126 through-hole with heatsink tab
- Terminals: Three-pin configuration (Emitter, Base, Collector)
- Application: Audio amplification, driver stages, switching
- Power Handling: Medium power with heatsinking capability
Part Numbers
- Motorola Part Number: 4880182D46
- Component Designation: 2N5190 NPN Transistor
- Package Type: TO-126 Through-Hole
