Schneider LADR4 Time Delay Auxiliary Contact Block, TeSys Deca, 1NO + 1NC, Off D

The Schneider Electric LADR4 is a TeSys Deca time delay auxiliary contact block, providing off-delay timer functionality with 1 NO + 1 NC contact configuration. It mounts to the front of TeSys Deca contactors and offers an adjustable off-delay range of 10 to 180 seconds for flexible timing control in motor and switching applications.

Technical specifications:

• Commercial reference: LADR4
• Manufacturer: Schneider Electric
• Series / range: TeSys Deca
• Product type: Time delay auxiliary contact block
• Contact configuration: 1 NO + 1 NC
• Timer type: Off-delay
• Time delay range: 10...180 s
• Rated operational voltage [Ue]: 690 V AC, 25...400 Hz
• Rated operational current [Ie]: 6 A at 120 V AC-15; 1.04 A at 690 V AC-15; 0.55 A at 125 V DC-13; 0.1 A at 600 V DC-13
• Rated insulation voltage [Ui]: 690 V per IEC 60947-5-1; 600 V per UL and CSA
• Conventional thermal current [Ith]: 10 A at 60 °C
• Rated making capacity [Irms]: 140 A at 690 V AC; 250 A at 690 V DC
• Short-time withstand: 100 A / 1 s; 120 A / 500 ms; 140 A / 100 ms (all at 60 °C)
• Fuse protection: GG 10 A
• Mechanical endurance: 5 million operating cycles
• Minimum switching current: 5 mA
• Minimum switching voltage: 17 V
• Non-overlap time: 1.5 ms (both opening and closing)
• Insulation resistance: greater than 10 MOhm
• Connection type: Screw terminals, 1 or 2 cables, 1...2.5 mm² flexible or rigid
• Tightening torque: 1.7 N.m
• Mounting location: Front
• Dimensions (HxWxD): 48 x 44 x 61 mm
• Colour: Dark grey
• IP rating: IP20 per IEC 60529
• Operating temperature: -40...70 °C
• Storage temperature: -60...80 °C
• Operating altitude: up to 3000 m
• Standards: EN/IEC 60947-5-1, UL 60947-5-1, CSA C22.2 No 60947-5-1, GB/T 14048.5, EN 50012
• Certifications: IECEE CB Scheme, UL, CSA, CCC, EAC, UKCA
• Warranty: 18 months

Features and benefits:

• Adjustable off-delay timing from 10 to 180 seconds enables flexible sequencing of motor stops and control circuits
• Front-mounting design allows direct attachment to compatible TeSys Deca CAD and LC1D contactors without additional wiring
• Wide voltage range up to 690 V AC covers industrial three-phase applications across international markets
• 1.5 ms non-overlap time between NC and NO contacts prevents simultaneous contact closure during transition
• Screw terminal connections accept 1...2.5 mm² flexible and rigid cables for straightforward panel wiring
• Compliant with multiple international standards including IEC, UL, CSA, and CCC for global deployment

Applications:

• Motor control panels requiring timed off-delay sequences to allow controlled deceleration before circuit opens
• Industrial automation systems using TeSys Deca contactors where auxiliary timing functions are needed
• HVAC and refrigeration control circuits requiring delayed shutdown sequencing per IEC 60335-2-40 Annex JJ
• Machine control panels in manufacturing environments where off-delay logic prevents abrupt load disconnection
• Process automation switchgear assemblies in industrial facilities requiring certified auxiliary timing blocks

Compliant with EN/IEC 60947-5-1, UL 60947-5-1, CSA C22.2 No 60947-5-1, and GB/T 14048.5. Part of the Schneider Electric TeSys Deca range.

Also known as: Schneider LADR4, Schneider Electric LADR4, TeSys D off-delay auxiliary contact block, time delay contactor auxiliary block.