Overview
The Square D 8501 XB20 is a Type X universal adder deck designed to expand the pole configuration of Class 8501 NEMA industrial control relays. This relay accessory adds two normally open (2 NO) convertible contact cartridges, allowing control engineers to increase relay functionality without replacing the base unit. Built for reliable operation in panel-mount and control circuit applications.
Key Features
- 2 normally open convertible contact cartridges installed
- Accepts additional contact cartridges for further expansion
- Screw clamp terminal configuration for secure wiring
- Compatible with Class 8501 Type X relay bases
- Ruggedized design for industrial control environments
Technical Specifications
- Rated Load: 10 amperes resistive at 600 VAC
- Contact Type: Normally Open (NO) convertible
- Mounting: Direct-mount on Class 8501 relay base
- Terminal Type: Screw clamp
- Series: A
- Weight: Approximately 1 lb
- NEMA Rating: 600 VAC
Typical Applications
- Panel-mount industrial relay circuits requiring expanded contact poles
- HVAC and motor control systems with multiple switching requirements
- Automated machinery and production line control logic
- Maintenance upgrades to existing relay assemblies
- Original equipment manufacturer (OEM) control panel builds
Compatibility & Replacements
Compatible With
- Square D Class 8501 Type X NEMA control relay bases
- Industrial control panel wiring harnesses using relay logic
- 600 VAC resistive load circuits
- Screw clamp terminal wiring methods
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The 8501 XB20 may be compatible with other Type X adder decks; consult the original relay documentation.
Works With
- Square D Type X relay contact cartridge line
- Class 8501 relay mounting tracks and assemblies
- Standard industrial control circuit architectures
