Overview
The Speer CF 1/2 carbon film resistor is a general-purpose, through-hole component engineered for widespread use in electronics repair, prototyping, and manufacturing. This 1000-piece box supplies 10Ω resistors rated for 0.5W dissipation with ±5% tolerance—standard for non-critical biasing, LED limiting, pull-up/pull-down networks, and signal conditioning applications. Carbon film construction provides stable performance across standard operating temperatures while maintaining low cost per unit.
Key Features
- Axial through-hole package: Color-coded leads for easy identification and hand insertion into breadboards and PCBs.
- Proven carbon film technology: Thin ceramic substrate with resistive film coating—more stable than carbon composition, suitable for consumer and industrial electronics.
- Bulk packaging: 1000-piece count reduces per-unit cost and minimizes reordering for production environments.
- Standard tolerance: ±5% meets IEC/ANSI specifications for general-purpose resistors without premium cost.
- Flammability rated: Compliant with standard PCB assembly and high-temperature soldering processes.
Technical Specifications
- Resistance Value: 10 Ω
- Power Rating: 0.5W (1/2W)
- Tolerance: ±5%
- Temperature Coefficient: -450 to +350 ppm/°C (typical)
- Operating Temperature Range: -55°C to +155°C
- Package Style: Axial leads, through-hole
- Composition: Carbon film on ceramic substrate
- Quantity per Box: 1000 pieces
Typical Applications
- LED current-limiting resistors in indicator circuits
- Pull-up and pull-down bias networks for logic gates and microcontrollers
- General-purpose prototyping and breadboarding
- Audio signal conditioning and coupling networks
- Power supply bleeder and load resistors
- Educational electronics kits and student labs
Compatibility & Replacements
Compatible With
- Breadboards and perfboards (standard 0.1″ spacing)
- Through-hole soldering on PCBs (wave, hand, and reflow processes)
- Any circuit schematic calling for a 10Ω, ±5%, 1/2W resistor
- Standard electronics design software and CAD libraries
Replaces / Drop-In Replacement For
- Equivalent 10Ω ±5% 1/2W carbon film resistors from Yageo (CFR), Vishay, or other major manufacturers
- KOA Speer CF and CFS series 10Ω variants in the same power rating
- Vintage Speer/Airco SPEER carbon film 10Ω 1/2W stock
Works With
- Standard resistor color code: Brown-Black-Black-Gold (10Ω ±5%)
- Temperature environments: Consumer, industrial, and automotive grade circuits (-55°C to +155°C rating supports most applications)
- Soldering standards: Compatible with IPC-A-610 hand soldering, wave soldering, and selective reflow assembly
