Schneider LA4DT0U Electronic Timer Module - Type on Delay 0.1...2s 24-250 V DC/A

The Schneider Electric LA4DT0U is an electronic timer module from the TeSys range, designed for use with TeSys D and TeSys F series contactors. It provides an on-delay timing function with an adjustable time delay range of 0.1 to 2 seconds, compatible with a wide control circuit voltage of 24 to 250 V AC/DC.

Technical specifications:

• Commercial reference: LA4DT0U
• Manufacturer: Schneider Electric
• EAN:
• Series / range: TeSys
• Product type: Serial timer module
• Device short name: LA4DT
• Poles: 3P
• Compatible contactors: LC1D09...D38, LC1D80...D150, LC1D40A...D80A
• Mounting location: Top
• Timer type: On delay
• Time delay range: 0.1...2 s
• Control circuit voltage [Uc]: 24...250 V AC 50/60 Hz / 24...250 V DC
• Control circuit voltage limits: 0.8...1.1 Uc (by mechanical contact)
• Rated insulation voltage [Ui]: 250 V, conforming to IEC 60947-1
• Connection: Control circuit connector, 1-2 cables, 1...2.5 mm², flexible or solid, with or without cable end
• Tightening torque: 1.7 N.m
• Electrical durability: 30 Mcycles
• Reset time: 150 ms during time delay / 50 ms after time delay
• Residual voltage [Ures]: 3.3 V
• Immunity to microbreaks: 10 ms during time delay / 2 ms after time delay
• Protection type: Built-in varistor
• Heat dissipation: 2 W
• IP degree of protection: IP2X, conforming to IEC 60529
• Operating temperature: -25...55 °C
• Storage temperature: -40...80 °C
• Product weight: 0.04 kg
• Standards: IEC 60255-5
• Certifications: UL, CSA
• Warranty: 18 months

Features and benefits:

• On-delay timer function with adjustable range of 0.1 to 2 seconds for precise motor start sequencing
• Wide control voltage range (24...250 V AC/DC) allows use across diverse power supply environments
• LED indicator illuminates during the time delay period for easy local monitoring
• Built-in varistor protection for reliable operation and extended service life
• High electrical durability rated at 30 million operating cycles
• Mounts directly on top of compatible TeSys D and TeSys F contactors for compact panel installation

Applications:

• Motor start delay sequencing in industrial automation and machine control panels
• Star-delta starter timing control with TeSys D series contactors
• Process control systems requiring timed contactor activation
• Conveyor and pump motor control with delayed start requirements
• Building automation systems using TeSys contactors for HVAC and lighting loads

Compliant with IEC 60255-5 and IEC 60947-1. Certified to UL and CSA standards. Part of the Schneider Electric TeSys range.

Also known as: Schneider LA4DT0U, Schneider Electric LA4DT0U, TeSys timer module on delay, contactor timer accessory.