Product Overview
Vintage Sfernice CPX1 5MΩ Precision Resistor - Unused NOS
The CPX1 series from Sfernice represents French engineering in high-stability axial resistors. This 5 megohm ±1% precision unit is part of their ceramic-bodied line, widely trusted in aerospace and military applications.
Kept in original storage, this resistor carries the clean ceramic body and white ink markings that defined Sfernice design from the 1960s–1980s. Its reliability made it a go-to component for long-life, low-noise circuits.
Product Condition
Unused, New Old Stock (NOS). Original markings intact. Shows only minor signs of handling from storage.
Product Overview
Sfernice, now part of Vishay, was a major European supplier of precision resistors. The CPX1 series was known for ceramic axial construction, tight tolerance, and low noise. This 5MΩ ±1% part offers long-term stability in demanding circuits.
Key Features
- Brand: Sfernice (later integrated into Vishay)
- Series: CPX1 ceramic axial resistor
- Resistance: 5MΩ (5,000,000 ohms)
- Tolerance: ±1% precision rating
- Power rating: approx. 0.5–1W (based on size, ~12 mm body)
- Construction: ceramic body with axial leads
- Era: 1960s–1980s vintage production
- Known for: low noise, high stability, and aerospace reliability
Applications
- High-reliability aerospace and defense circuits
- Precision measurement and calibration equipment
- Vintage electronics repair and restoration
- Experimental lab and prototyping projects
- Long-life industrial instrumentation
- Collector or archival component builds
Frequently Asked Questions
What does “NOS” mean for this resistor?
It means the resistor is unused, New Old Stock, kept from its original production era without installation.
What tolerance does this resistor offer?
This part has a ±1% tolerance, making it highly accurate compared to standard resistors of its time.
What is the estimated power rating?
Judging by the ceramic body size (~12 mm length), it is rated for approximately 0.5–1 watt dissipation.
Why are Sfernice CPX1 resistors notable?
The CPX1 series earned a reputation for low noise, high stability, and rugged ceramic construction, making them staples in aerospace and military systems.
Can this resistor be used in modern circuits?
Yes, it can perform in any circuit requiring a stable 5MΩ ±1% resistor, though it also holds value for restorations and collectors.
A relic of French precision engineering, the Sfernice CPX1 stood for dependability in demanding circuits. Preserved to this day, its next story belongs to you.
