ABB t16-4.2 thermal overload relay 3.1a - 4.2a

Why Choose the ABB T16-4.2 Thermal Overload Relay?

The ABB T16-4.2 Thermal Overload Relay with product code 1SAZ711201R1035 is a compact and highly reliable motor protection relay designed to safeguard three-phase motors against overload conditions and phase failure. As part of the trusted ABB T16 thermal overload relay series, this electromechanical protection device is engineered for use with ABB mini contactors and motor starters in industrial automation systems.

This thermal overload relay delivers dependable motor protection by disconnecting the motor circuit during excessive current conditions, helping prevent overheating, motor damage and costly downtime. The relay includes adjustable overload settings, integrated auxiliary contacts and both manual and automatic reset functionality for flexible operation in industrial environments.

With an adjustable current range of 3.1 to 4.2 A, integrated 1 NO + 1 NC auxiliary contacts, and a compact direct-mount design, the ABB T16-4.2 is ideal for protecting small industrial motors used in pumps, conveyors, compressors, fans and machine building applications.

Key Advantages

• Reliable thermal overload protection for three-phase motors.
• Adjustable current setting from 3.1 to 4.2 A.
• Integrated phase failure sensitivity for enhanced motor protection.
• Compact design for direct mounting to ABB contactors.
• Trip class 10 for standard motor starting applications.
• Selectable manual or automatic reset operation.
• Integrated STOP function and trip indication.

Key Features

• ABB T16 thermal overload relay series.
• 3.1 to 4.2 A adjustable current range.
• Trip class 10 overload protection.
• 3-pole motor protection relay.
• Integrated 1 NO and 1 NC auxiliary contacts.
• Temperature compensated operation.
• Automatic or manual reset selectable.
• Direct mounting to ABB mini contactors.
• Compact IP20 housing for panel installation.

Technical Specifications

• Manufacturer: ABB
• Series: T16 Thermal Overload Relays
• Model: T16-4.2
• Product code: 1SAZ711201R1035
• Product type: Thermal overload relay
• Current adjustment range: 3.1 to 4.2 A
• Rated operational current: 4.2 A
• Trip class: Class 10
• Number of poles: 3
• Auxiliary contacts: 1 NO + 1 NC
• Rated insulation voltage: 690 V AC
• Auxiliary circuit voltage: 600 V AC/DC
• Protection rating: IP20
• Reset method: Automatic or manual
• Mounting type: Direct mounting / DIN rail
• Terminal type: Screw terminals
• Dimensions (H × W × D): approx. 76.7 × 45 × 53.5 mm
• Operating temperature: approx. -25 °C to +60 °C
• Weight: approx. 0.1 kg

Reliable Motor Protection for Industrial Applications

Thermal overload relays protect electric motors by monitoring motor current and disconnecting the circuit when excessive current causes overheating conditions. This helps extend motor life, reduce unexpected downtime and improve the reliability of industrial automation systems.

The ABB T16 series is designed for seamless integration with ABB contactors and motor starters. Its compact dimensions, integrated auxiliary contacts and flexible reset functionality make it ideal for modern industrial control panels and machine building applications.

Typical Applications

• Industrial motor starter assemblies.
• Conveyors and material handling systems.
• Pumps, compressors and fans.
• Packaging and processing machinery.
• OEM machinery and automation systems.
• HVAC and industrial ventilation equipment.

Trusted by Industrial Engineers Worldwide

ABB thermal overload relays are widely used in industrial automation and motor control systems to provide dependable motor protection, minimise downtime and improve equipment reliability in demanding operating environments.