Siemens Industrial Controls 3UB85335GW2 Solid State Overload Relay - ESP200 25-100A 3-Phase

The Siemens 3UB8533-5GW2 is a solid state overload relay from the ESP200 series, designed for comprehensive motor protection in industrial applications. This 3-phase overload relay features an adjustable current range of 25 to 100 amps, making it suitable for medium to large motor installations.

Key Features:

• Adjustable current rating: 25-100 amps for flexible motor protection
• Solid state technology eliminates heater replacement after short circuits
• Selectable trip classes (5, 10, 20, or 30) via DIP switches accommodate light, normal, and heavy starting conditions
• Phase loss protection trips in less than 3 seconds to prevent motor burnout
• Phase unbalance protection minimizes temperature rise in asymmetrical 3-phase systems
• 1NO-1NC auxiliary contacts for control circuit integration
• Direct mounting and stand-alone mounting options
• Screw terminal connections for secure wiring
• Built-in test button verifies complete electronic functions and trip mechanism
• Thermal memory prevents motor restart while still hot
• Wide operating temperature range: -25°C to 65°C (-13°F to 149°F)
• Conformally coated circuit board resists harsh environmental conditions
• Removable terminal block allows wire removal without disconnecting
• Automatic reset (3 minutes) or manual reset options
• Repeat accuracy under 1% for precise settings and reduced nuisance tripping

The ESP200 series represents advanced motor protection technology, offering superior reliability compared to traditional bimetallic overload relays. Its solid state design provides self-protection during short circuit conditions when used with appropriate fuses or motor starter protectors. Ideal for industrial control panels, motor control centers, and standalone motor protection applications.