Schneider LADN40 Electric LADN40 TeSys Deca Auxiliary Contact Block 4NO

The Schneider Electric LADN40 is a TeSys Deca front-mount auxiliary contact block with 4 normally open (NO) instantaneous contacts and screw terminal connections. Compatible with TeSys D and TeSys Deca contactors, it is rated for 690 V AC operation with a conventional thermal current of 10 A at 60°C.

Technical specifications:

• Commercial reference: LADN40
• Manufacturer: Schneider Electric
• EAN:
• Series / range: TeSys Deca
• Product type: Auxiliary contact block
• Contact arrangement: 4 NO (normally open), instantaneous
• 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 (IEC 60947-5-1); 600 V (UL/CSA)
• Conventional thermal current [ith]: 10 A at 60°C
• Rated making capacity (Irms): 140 A AC; 250 A DC (IEC 60947-5-1)
• Minimum switching current: 5 mA; minimum switching voltage: 17 V
• Non-overlap time: 1.5 ms (opening and closing)
• Insulation resistance: greater than 10 MOhm
• Mechanical durability: 30 million cycles
• Fuse protection: GG fuse 10 A
• Connection: Screw terminals, 1-4 mm², tightening torque 1.7 N.m
• Mounting: Front
• Dimensions (W x H x D): 44 x 48 x 42 mm
• Weight: 0.05 kg
• Color: Dark grey
• IP protection: IP2x (IEC 60529)
• Protective treatment: TH (IEC 60068)
• Operating temperature: -5 to 60°C
• Storage temperature: -60 to 80°C
• Operating altitude: up to 3000 m
• Certifications: CB Scheme, UL, CSA, CCC, EAC, UKCA
• Standards: EN/IEC 60947-5-1, GB/T 14048.5, EN 50012

Features and benefits:

• 4 NO contacts extend signaling and interlocking circuits on TeSys D and TeSys Deca contactors without additional wiring components
• Instantaneous contact action with 1.5 ms non-overlap time ensures precise and reliable switching sequences
• 30 million mechanical cycles delivers long service life in high-frequency industrial switching applications
• Accepts 1-4 mm² flexible and rigid cables via screw terminals, supporting single or dual cable entry per pole
• Globally certified to UL, CSA, CCC, EAC, and UKCA for use across international markets

Applications:

• Motor control panels using TeSys D contactors where additional auxiliary signal contacts are required
• Industrial automation cabinets needing interlocking, status feedback, or cascaded contactor control
• HVAC control assemblies designed to comply with IEC 60335-2-40
• Machine control switchgear panels requiring front-mounted auxiliary contact expansion

Compliant with EN/IEC 60947-5-1, GB/T 14048.5, and EN 50012. Part of the Schneider Electric TeSys Deca range.

Also known as: Schneider LADN40, Schneider Electric LADN40, TeSys D auxiliary contact block 4NO.