3TH4244-3LB4

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Standards

IEC/EN 60947‑4‑1

The contactor relays are finger-safe according to IECВ 60529. Terminal covers may have to be fitted onto the connecting bars, depending on the configuration with other devices.

Ambient temperature

The permissible ambient temperature for operation of the contactors (across the full coil operating range) is -50 to +70В В°C. Uninterrupted duty at temperatures <В -25В В°C and >В +55 В°C reduces the mechanical endurance, the current carrying capacity of the conducting paths and the switching frequency.

A clearance of 10 mm is required for side-by-side mounting at ambient temperatures >55 В°C. There is no need to reduce the technical specifications.