Overview
The Durakool AFM20-303-M relay is a proven, mercury-based general-purpose relay designed for industrial control circuits and electrical equipment. Manufactured by Durakool (American Electronic Components), this single-pole, normally-open (SPST-NO) relay features a 120V 50/60Hz coil and 20A contact rating, making it suitable for a wide range of switching applications in machinery, process control, and automation systems.
Key Features
- Mercury contact design for low noise and consistent switching performance
- SPST-NO (Single Pole Single Throw Normally Open) contact configuration
- 120V 50/60Hz dual-voltage coil operation
- 20A current rating at rated voltage
- Compact, modular form factor for panel-mount installation
- Robust construction for industrial duty cycles
Technical Specifications
The relay meets Class B insulation standards and operates reliably across standard industrial voltage and frequency requirements. Standard mounting provisions allow integration into control panels and OEM systems.
Typical Applications
- Industrial control circuits and relay logic networks
- Machine control and sequencing circuits
- Process automation switching
- Electrical equipment protection and monitoring
- Panel-mounted control systems
Compatibility & Replacements
Compatible With
- Standard relay socket and quick-connect terminal systems
- Industrial control cabinets and panel assemblies
- 120V AC supply circuits (50/60Hz)
- Conventional relay logic networks
Replaces / Drop-In Replacement For
The AFM20-303-M is a direct replacement for other Durakool AFM20 series relays with identical coil voltage and contact ratings. Verify socket type and terminal configuration with your system before replacement.
Works With
- Standard relay socket systems (quick-connect and solder terminals)
- 120V AC control circuits
- Industrial PLC input/output modules (relay interface cards)
- Motor control centers and starter assemblies
- HVAC and process control panels
