Overview
The Airco Electronics CF 1/2 carbon film resistor is a proven, cost-effective fixed resistor used in countless electronics applications. CF 1/2 is the industry-standard designation for a 0.5-watt carbon film axial through-hole resistor. This bulk box contains 1,000 units rated at 51k ohms with ±5% tolerance, making it ideal for OEM production runs, repair shops, hobbyist projects, and component replacement where high volume and reliability matter.
Key Features
- Resistance: 51,000 ohms (51k Ω)
- Power rating: 0.5 watts (1/2 watt)
- Tolerance: ±5% per EIA specifications
- Axial leads with standard color-band coding
- Bulk quantity: 1,000 pieces per box
- Lead composition and geometry suitable for automated insertion and soldering
Technical Specifications
- Resistance value: 51 kΩ (51,000 Ω)
- Power rating: 0.5 W (500 mW)
- Maximum working voltage: 250 V typical for carbon film construction
- Tolerance: ±5%
- Temperature coefficient: standard range –500 to +350 ppm/°C
- Case style: axial leads, through-hole
- Package quantity: 1,000 pcs per box
- RoHS compliance: standard for modern stock
Typical Applications
- Audio and consumer electronics repair and design
- Industrial control circuits and logic boards
- Power supply filter networks
- Timing and oscillator circuits
- Sensor interface and instrumentation
- Educational electronics and prototyping
- High-volume PCB assembly and manufacturing
Compatibility & Replacements
Carbon film resistors conform to industry standards (EIA-RS-196, JIS-C-6402, IEC-115) and are widely interchangeable within the same resistance, wattage, and tolerance class.
Compatible With
- Standard PCB through-hole designs (0.1″ spacing)
- Automated component insertion equipment
- Wave soldering and selective soldering processes
- Manual point-to-point and breadboard assembly
- Electronic repair shops and field service kits
Replaces / Drop-In Replacement For
- Any generic 51k ohm, 0.5W, ±5% carbon film resistor
- KOA Speer, Stackpole, Vishay, and other leading brands in the CF 1/2 class
- Legacy Airco Speer stock code CF 1/2 51k
Works With
- Standard through-hole PCB layout tools (KiCAD, Eagle, Altium, etc.)
- IPC soldering and assembly standards
- Breadboard and prototype layouts
- Test equipment and instrumentation circuits
