Overview
The National Electronics NL-5552A Size C Ignitron tube is a specialized high-reliability electronic switching device engineered for critical power control and industrial switching applications. This Size C variant represents a proven technology that has served industrial electronics and power systems for decades. The National Electronics NL-5552A delivers the stable, repeatable switching performance required in legacy control systems and restoration projects.
Key Features
- Size C classification for specific application matching
- Ignitron technology for high-current switching capability
- New-in-box condition with original factory packaging
- Proven reliability in industrial and pulse power applications
- Direct replacement compatibility with legacy equipment specifications
Technical Specifications
The National Electronics NL-5552A is classified as a Size C Ignitron tube, a mercury-pool rectifier device with ignitor-fired switching technology. Ignitron tubes in this family are designed to handle high peak and average currents in switching service, making them suitable for welding controls, pulse power applications, and industrial motor speed control systems. The tube operates as a gas-filled switching device with precise ignitor triggering for reliable circuit control.
Typical Applications
- Welder control systems and resistance welding equipment
- Pulse power switching (capacitor discharge, laser switching, magneforming)
- Large industrial motor speed controls
- Electroplating rectifier circuits
- High-current DC switching and crowbar protection circuits
- Legacy industrial electronics restoration and equipment repair
Compatibility & Replacements
Compatible With
- Legacy National Electronics Ignitron control systems
- Industrial welder control panels and circuits
- Pulse power equipment and magneforming systems
- Motor speed control and electroplating rectifier systems
- Equipment requiring Size C Ignitron specifications
Replaces / Drop-In Replacement For
The National Electronics NL-5552A Size C is a direct replacement for original equipment applications designed for this specific model. Verify compatibility with your system integrator or equipment documentation before ordering, as ignitron tube sizing and specifications are application-critical.
Works With
- Industrial electrical control systems using mercury-pool rectifier technology
- Equipment designed for Size C Ignitron tube specifications
- Legacy switching and power control circuits
- Industrial power rectification and pulse power systems
