Overview
The Rohm R50J 3.9kΩ carbon film axial resistor is a standard fixed resistor designed for general-purpose electronic applications. These through-hole components feature a carbon film construction that delivers stable resistance values and reliable performance across a wide temperature range. Packaged in a convenient box of 1,000 units, these resistors are essential inventory for electronics manufacturers, repair technicians, and hobbyists who need dependable passive components.
Key Features
- Carbon film construction for stable, accurate resistance performance
- Axial lead configuration for through-hole mounting on PCBs and breadboards
- 3.9kΩ nominal resistance value with standard tolerance
- Wide operating temperature range suitable for industrial and consumer applications
- Bulk packaging (1,000 units per box) reduces per-unit cost and simplifies inventory management
Technical Specifications
The following specifications are based on standard Rohm R50J carbon film resistor characteristics:
- Resistance Value: 3.9 kΩ
- Tolerance: ±5%
- Power Rating: 0.25 W (typical for R50J series)
- Voltage Rating: 200 V (typical working voltage)
- Temperature Coefficient: 350–700 PPM/°C
- Operating Temperature Range: −55°C to +155°C
- Lead Diameter: 0.8 mm (standard axial)
- Case Diameter: 5 mm
- Case Length: 12 mm
- Quantity Per Box: 1,000 units
Typical Applications
- General-purpose fixed-value resistors in amplifier and filter circuits
- Pull-up and pull-down resistor networks in digital logic circuits
- Frequency-setting resistors in oscillator and timing circuits
- Current-limiting resistors for LED circuits and sensor input conditioning
- Prototyping and breadboard design where quick component substitution is needed
- Production assembly and rework inventory for consumer and industrial electronics
Compatibility & Replacements
Compatible With
- Standard PCB designs using through-hole resistor footprints
- Breadboards and solderless prototyping platforms
- All common electronics assembly and rework tools
- Industrial and consumer electronic equipment requiring fixed-value resistors
Replaces / Drop-In Replacement For
- Other Rohm R50J 3.9kΩ units (identical specifications)
- Generic 3.9kΩ ±5% carbon film axial resistors meeting IEC 60062 standards
- Any standard carbon film resistor with matching voltage and power ratings in the same footprint
Works With
- Standard PCB design software (Eagle, KiCad, Altium Designer)
- Through-hole soldering equipment and wave solder processes
- Manual and automated component insertion systems
- All modern oscilloscopes and multimeters for in-circuit resistance verification
