TeSys Deca
Schneider Electric catalog image for this SKU; may represent the product family.
TIME DELAY AUXILIARY CONTACT BLOCK
TeSys D - time delay auxiliary contact block - 1 NO + 1 NC screw clamp terminals
SKU LADT4Schneider Electric LADT4 is a time delay auxiliary contact block in the TeSys Deca range. Key specifications include contact configuration: 1 NO + 1 NC; operational voltage: 690 V AC 25...400 Hz; ip protection: IP20 conforming to IEC 60529.
1 NO + 1 NCContact configuration
690 V AC 25...400 HzOperational voltage
IP20 conforming to IEC 60529IP protection
PRODUCT DATA
Technical specifications
Source: Schneider Electric product catalog.
Verified September 17, 2026.
| Product reference | LADT4 |
|---|---|
| Range | TeSys TeSys Deca |
| Product name | TeSys Deca |
| Product or component type | Time delay auxiliary contact block |
| Range compatibility | TeSys Deca CAD TeSys Deca LC1D TeSys F LC1F TeSys F CR1F |
| Mounting location | Front |
| Pole contact composition | 1 NO + 1 NC |
| Contacts operation | Time delay |
| Timer type | On delay |
| Time delay range | 10...180 s |
| [Ue] rated operational voltage | 690 V AC 25...400 Hz |
| [Ie] rated operational current | 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 |
| [Ui] rated insulation voltage | 690 V conforming to IEC 60947-5-1 600 V conforming to UL 60947-5-1 600 V conforming to CSA C22.2 No 60947-5-1 |
| [Ith] conventional free air thermal current | 10 A (at 60 °C) |
| Standards | EN/IEC 60947-5-1 UL 60947-5-1 CSA C22.2 No 60947-5-1 GB/T 14048.5 EN 50012 IEC 60335-1:Clause 30.2 IEC 60335-2-40:Annex JJ UL 60335-2-40:Annex JJ |
| Product certifications | IECEE CB Scheme UL CSA CCC EAC UKCA |
| Irms rated making capacity | 140 A at <= 690 V AC conforming to IEC 60947-5-1 250 A at <= 690 V DC conforming to IEC 60947-5-1 |
| Permissible short-time rating | 100 A 60 °C 1 s 120 A 60 °C 500 ms 140 A 60 °C 100 ms |
| Protection type | GG fuse 10 A |
| Mechanical durability | 5 Mcycles |
| Minimum switching current | 5 mA |
| Minimum switching voltage | 17 V |
| Non-overlap time | 1.5 ms on de-energisation no overlap between NC and NO contact 1.5 ms on energisation no overlap between NC and NO contact |
| Insulation resistance | > 10 MOhm |
| Connections - terminals | Screw clamp terminals 1 cable(s) 1…2.5 mm²flexible with cable end Screw clamp terminals 1 cable(s) 1…2.5 mm²flexible without cable end Screw clamp terminals 2 cable(s) 1…2.5 mm²flexible with cable end Screw clamp terminals 2 cable(s) 1…2.5 mm²flexible without cable end Screw clamp terminals 1 cable(s) 1…2.5 mm²rigid Screw clamp terminals 2 cable(s) 1…2.5 mm²rigid Screw clamp terminals |
| Tightening torque | 1.7 N.m - with screwdriver flat Ø 6 mm 1.7 N.m - with screwdriver Philips No 2 1.7 N.m - with screwdriver pozidriv No 2 |
| Height | 48 mm |
| Width | 44 mm |
| Depth | 61 mm |
| Colour | Dark grey |
| Environmental characteristic | Normal environment |
| IP degree of protection | IP20 conforming to IEC 60529 |
| Protective treatment | TH conforming to IEC 60068 |
| Ambient air temperature for storage | -60…80 °C |
| Ambient air temperature for operation | -40…70 °C |
| Operating altitude | 3000 m |
For complete electrical ratings, applicable standards, connection requirements and installation instructions, consult the official Schneider Electric reference ↗.