No, neither the LC1SK** (AC coils) or LP1SK** (DC coils) range of contactors come with coil suppression.
Add-on Varistors and Diodes are available. They will clip into the side of the contactors.
Varistors:
- If coil 24..48V ac/dc: LA4SKE1E
- If coil 110..250V ac/dc LA4SKE1U
Diode:
- If coil 24..250Vdc: LA4SKC1U