The spring-loaded terminals on both main and auxiliary circuits accept 0.25 to 2.5 mm² solid or stranded wire (24 to 14 AWG). No clearance needed at the sides or rear — zero spacing required — so you can pack these tight in a panel.
Breaking capacity varies by voltage: 100 kA at 240 V AC, 50 kA at 400 V AC, dropping to 3 kA at 500 V and 2 kA at 690 V. The maximum switching frequency for AC-3 duty is 15 operations per hour. Power dissipation in hot operating state is 9.25 W — factor that into panel thermal calculations.