Overview
The Square D 58547 JK A14.1 is a thermal overload relay unit designed for the JK series motor starter protection system. As a thermal heater element, the A14.1 provides dependable overload protection by detecting excessive motor current and triggering relay contacts to de-energize the circuit before damage occurs. This lot includes five units, all new in box condition, making it ideal for inventory replenishment, system expansion, or scheduled maintenance.
Key Features
- Thermal heater element rated for the A14.1 specification class
- Compatible with Square D JK series motor starters and overload relays
- Melting alloy design for accurate, repeatable trip characteristics
- Lot of 5 units – cost-effective bulk purchase for maintenance programs
- New in box condition with original manufacturer packaging
Technical Specifications
- Part Number: 58547 (JK series designation)
- Model: A14.1
- Type: Thermal overload relay heater element
- Series: JK (Square D classic motor starter overload relay)
- Technology: Melting alloy thermal sensing
- Condition: New in box
- Quantity: 5 units per lot
- Application: Motor overload protection in industrial automation and machinery control
Typical Applications
- Motor starter overload protection circuits
- Industrial machinery and pump control systems
- Machine tool automation and motion control
- HVAC and compressed air system protection
- Maintenance replacement and spare parts inventory
- System upgrades and capacity expansion
Compatibility & Replacements
Compatible With
- Square D JK series overload relays
- Square D JK series motor starters
- Industrial motor control circuits using JK-style overload protection
Replaces / Drop-In Replacement For
- Square D A14.1 thermal heater elements (original equipment)
- Equivalent A14.1-rated thermal overload units in JK starter assemblies
Works With
- Square D JK series overload relay bases and coils
- Standard motor control circuits (single-phase and three-phase)
- Thermal overload protection systems using melting alloy heater technology
