ABB tef4-on electronic timers

Why Choose the ABB TEF4-ON Frontal Electronic Timer?

The ABB TEF4-ON is a compact and highly reliable frontal electronic timer relay designed for use with ABB AF, AFC, NF and NFC contactors and contactor relays in industrial automation and motor control systems. Identified by part number 1SBN020112R1000, this timer forms part of the advanced ABB TEF4 electronic timer series, engineered to provide accurate ON-delay timing functionality in demanding industrial environments.

The TEF4-ON provides an adjustable ON-delay timing function with selectable timing ranges up to 100 seconds, allowing machinery, motors and control systems to operate with controlled switching sequences and improved process reliability. The timing function is activated when the associated contactor closes, enabling precise delayed switching for automation applications.

Featuring direct plug-in mounting onto compatible ABB contactors, integrated surge suppression, and a compact front-mounted design, the TEF4-ON delivers dependable timing performance while reducing panel space requirements and simplifying installation inside modern control cabinets.

Key Advantages

• Reliable ON-delay timing functionality for industrial automation systems.
• Adjustable timing range up to 100 seconds.
• Front-mounted direct plug-in installation.
• Compatible with ABB AF, AFC, NF and NFC contactors.
• Integrated surge protection varistor.
• Compact design reduces panel space requirements.
• Mechanical status indicator for simplified monitoring.

Key Features

• ABB TEF4-ON frontal electronic timer.
• ON-delay timing function.
• Adjustable delay ranges from 0.1 to 100 seconds.
• Three selectable timing ranges.
• 1 NO + 1 NC auxiliary contacts.
• Direct plug-in parallel connection to A1/A2 coil terminals.
• Integrated varistor surge suppression.
• Mechanical contactor status indicator.
• Compact front-mounted construction.
• Suitable for industrial motor control systems.

Technical Specifications

• Manufacturer: ABB
• Series: TEF4
• Model: TEF4-ON
• Part number: 1SBN020112R1000
• Product type: Frontal electronic timer
• Timer function: ON-delay
• Timing range: 0.1 to 100 seconds
• Timing range selection: 3 selectable ranges
• Auxiliary contacts: 1 NO + 1 NC
• Number of poles: 2P
• Rated operational voltage: 24 V DC / 240 V AC
• Rated frequency: 50 / 60 Hz
• Rated operational current AC-15: 3 A at 24/127 V AC, 1.5 A at 220/240 V AC
• Rated operational current DC-13: 1 A at 24 V DC
• Rated insulation voltage: 400 V IEC, 300 V UL/CSA
• Impulse withstand voltage: 4 kV
• Conventional free-air thermal current: 5 A
• Maximum electrical switching frequency: 1200 cycles/hour AC-15
• Maximum mechanical switching frequency: 3600 cycles/hour
• Terminal type: Screw terminals
• Protection rating: IP20
• Compatible contactors: ABB AF09...AF96, AFC09...AFC96, NF and NFC contactor relays
• Operating temperature: approx. -25 °C to +70 °C
• Standards: IEC/EN 60947-5-1, UL 508, CSA C22.2
• Dimensions (W × H × D): approx. 43 × 41.6 × 67.7 mm
• Weight: approx. 0.065 kg
• EAN: 3471523130630

Reliable Timing Control for Industrial Automation

Electronic timer relays are widely used in industrial automation systems to introduce controlled switching delays for motors, contactors and machinery. ON-delay timers allow equipment to energise only after a predefined delay, improving process sequencing and protecting machinery from sudden simultaneous operation.

The ABB TEF4-ON provides a compact and efficient solution for automation engineers, panel builders and machine manufacturers requiring dependable timing control integrated directly onto ABB contactors and relays.

Typical Applications

• Industrial motor control systems.
• Sequential machinery start-up.
• HVAC compressor and fan control.
• Industrial automation and process control.
• Conveyor and material handling systems.
• Machine safety and delayed switching applications.

Trusted by Industrial Automation Engineers Worldwide

ABB TEF4 electronic timers are widely used by automation engineers and panel builders to deliver dependable timing control, simplified installation and reliable switching performance in industrial motor control systems.