Overview
The I-T-E A203B is a Size 0 motor starter designed for 3-phase AC motor control applications. Rated at 600VAC maximum with a 20A current capacity, this unit is engineered for smaller motors and compact control systems. The A203B combines proven electromagnetic starter design with compact footprint, making it a reliable choice for legacy industrial automation systems that require proven, durable motor control.
Key Features
- Size 0 form factor — compact design suitable for space-constrained installations
- 3-phase AC operation at 600VAC maximum rating
- 20A current capacity for small to medium motor protection and control
- Electromagnetic contactor design with proven field reliability
- Standard mounting configuration for panel integration
- Drop-in replacement for legacy I-T-E motor starter installations
Technical Specifications
- Manufacturer: I-T-E Imperial Corp
- Model: A203B
- Size: Size 0
- Voltage Rating: 600VAC maximum
- Current Rating: 20 Amperes
- Phase: 3-Phase AC
- Configuration: Motor starter / electromagnetic contactor
- Product Type: Industrial motor control
Typical Applications
- Smaller induction motor control in manufacturing equipment
- HVAC system motor control
- Pump and compressor motor starters
- Legacy industrial automation systems requiring 600VAC rated starters
- Panel-mounted motor control centers and starter cabinets
- Retrofit and equipment upgrades for classic industrial machinery
Compatibility & Replacements
Compatible With
- 600VAC 3-phase AC power systems
- Panel-mount starter enclosures
- Standard 3-phase industrial motor control circuits
- Legacy I-T-E and Gould automation systems
- Electrical switchgear and motor control center (MCC) installations
Replaces / Drop-In Replacement For
- Original I-T-E A203B units
- Gould A203B motor starters
- Other Size 0 600VAC 20A motor starter designs from the same era
Works With
- Standard 3-phase AC power distribution systems
- Thermal overload relays and motor protection devices
- Manual and automatic control circuits
- Industrial electrical control enclosures
- Verify compatibility with your system integrator before ordering












