Overview
The Sprague 590-400DC is a 32D Series aluminum electrolytic capacitor engineered for dependable operation in radio communication, amateur radio, and industrial electronics applications. With a 400V DC rating, this vintage Sprague capacitor represents the quality manufacturing standards the company became known for before its acquisition by Vishay in 1992. This new old stock (NOS) unit is fully functional and ready for installation in legacy equipment restoration, RF amplifiers, power supplies, and communication systems.
Key Features
- 400V DC rated voltage for high-voltage circuit applications
- 32D Series aluminum electrolytic construction
- Vintage Sprague manufacturing for proven reliability in professional and hobbyist radio equipment
- New old stock condition — untested but visually inspected
- Compatible with ham radio, CB radio, and RF amplifier circuits
- Solder-lug terminals for direct board integration
Technical Specifications
- Manufacturer: Sprague Electric
- Part Number: 590-400DC
- Series: 32D Compulytic
- Voltage Rating: 400V DC
- Capacitor Type: Aluminum Electrolytic
- Polarity: Polarized
- Terminal Style: Solder Lugs
- Operating Temperature: -10°C to +85°C (typical for era)
- Condition: NOS (New Old Stock)
Typical Applications
- Radio frequency (RF) power amplifiers and transmitters
- Ham radio (amateur radio) equipment and transmitters
- High-voltage power supplies and filter circuits
- CB radio (Citizens Band) electronics
- Industrial control and switching applications
- Vintage audio and communications equipment restoration
- Military and aerospace legacy system maintenance
Compatibility & Replacements
Compatible With
- Vintage ham radio and CB radio equipment
- High-voltage RF amplifier circuits (up to 400V)
- Industrial power supplies and filter networks
- Legacy military and aerospace electronics
- Audio amplifier power supply stages
Replaces / Drop-In Replacement For
The Sprague 590-400DC is a legacy capacitor no longer in active production. While direct modern equivalents may vary by application-specific requirements, Vishay (the current manufacturer of Sprague assets) produces compatible aluminum electrolytic capacitors in the 32D and 500D series. For exact electrical compatibility in your application, verify capacitance value (μF) and physical dimensions with your equipment schematic or system integrator.
Works With
- Vintage radio communication systems and transmitters
- Ham radio amplifier circuits and tuners
- High-voltage DC filtering applications
- Industrial equipment requiring 400V-rated electrolytic capacitors
- Restoration and legacy system maintenance workflows
