Overview
The Jefferson Electric 637-231 is a 75VA control transformer engineered for industrial automation and electrical system applications. With a 120V primary winding and 24V secondary output, this transformer provides the voltage step-down necessary for PLC control circuits, solenoids, relays, indicator lights, and other 24VDC/24VAC-powered devices common in manufacturing and process control environments.
Key Features
- 75VA capacity — suitable for moderate control and signaling loads
- 120V to 24V transformer ratio — standard industrial control voltage conversion
- 50/60 Hz operation — compatible with North American power standards
- Compact, rugged industrial enclosure design
- Proven Jefferson Electric reliability and build quality
Technical Specifications
- Manufacturer: Jefferson Electric
- Model: 637-231
- Power Rating: 75 VA
- Primary Voltage: 120V AC
- Secondary Voltage: 24V AC
- Frequency: 50/60 Hz
- Phase: Single-phase
- Secondary Current (approx.): 3.13 A
- Transformer Type: Control / Industrial
- Condition: Used, fully functional
Typical Applications
- PLC control and logic circuit power supplies
- Industrial solenoid and relay coil operation
- Indicator lamp and signal light circuits
- Automation machinery and process equipment
- Building HVAC and facility control systems
- Machine tool control and operator interface power
Compatibility & Replacements
Compatible With
- Allen-Bradley PLCs and control modules requiring 24V power
- Siemens S5/S7 control systems
- Rockwell Automation control devices
- Standard industrial 120V AC line voltage systems
- Any equipment designed for 24V AC or DC control supply
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering
Works With
- Industrial automation control networks
- 24V DC power supplies and UPS systems
- Solenoid valves (pilot-duty 24VAC)
- Safety relays and interlock circuits
- Standard industrial electrical distribution cabinets
