It mounts on the front of TeSys Deca contactors and reversing starters, connecting via lugs-ring terminals with an 8 mm outer diameter. The block is rated for a conventional free air thermal current (Ith) of 10 A at 60 °C and an insulation voltage (Ui) of 690 V, conforming to IEC 60947-5-1, UL 60947-5-1, and CSA C22.2 No 60947-5-1. This block is designed for control circuits in motor starters and industrial panels where front-access auxiliary contacts are needed for status feedback or interlocking.
The rated operational current (Ie) varies by duty: 6 A at 120 V AC-15 (solenoid/contactor coil loads), 1.04 A at 690 V AC-15, 0.55 A at 125 V DC-13 (DC solenoid loads), and 0.1 A at 600 V DC-13. The AC-15 and DC-13 ratings are the ones that govern real-world switching of inductive control loads — the 10 A Ith figure is a thermal benchmark, not a switching capacity. The rated making capacity reaches 140 A AC and 250 A DC, confirming the block can handle inrush from pilot devices. Minimum switching capability is 5 mA at 17 V, which matters when the block interfaces with low-power PLC inputs or solid-state logic — below this threshold, contact oxidation may cause intermittent failures. The permissible short-time ratings (100 A for 1 s, 120 A for 500 ms, 140 A for 100 ms) provide headroom for fault clearing coordination with upstream GG fuse protection rated at 10 A.
Lifecycle Status and Sourcing Reality
If you are evaluating a form-fit-function substitute, the closest active sibling in the TeSys Deca family would be a front-mount 2NO auxiliary contact block with lugs-ring terminals. However, no official L* successor order code is listed — any substitution must be verified for mounting footprint, terminal type, and electrical ratings against your specific panel layout.
Installation and Environmental Notes
The block is TH-treated per IEC 60068 for protection against humidity and corrosive atmospheres, and is rated for operation up to 3000 m altitude without derating. Insulation resistance exceeds 10 MΩ.