Siemens SIRIUS 3SK1

12.2 Electrical endurance
Electrical endurance of 3SK1 safety relays and 3RQ1 coupling relays
Note
When using the devices to equip furnaces to DIN EN 50156-1, the load (utilization category)
listed below must not be exceeded.
The electrical endurance is ≥ 250,000 operating cycles under the following conditions:
Utilization category 3SK111; 3SK1121; 3SK1211;
3RQ1000-.HB00; 3RQ1000-.LB00;
3RQ1000-.HW00; 3RQ1000-.LW00
3SK1213
AC-1, 240 V 1.5 A 10.0 A
AC-15, 240 V 0.2 A 10.0 A
DC-13, 24 V 2.0 A 3.0 A
Electrical endurance of 3SK1 safety relays and 3RQ1 coupling relays for the following device
versions
3SK1121-.AB40 3RQ1000-.HB00
3SK1111-.AB30 3RQ1000-.LB00
3SK1111-.AW20 3RQ1000-.HW00
3SK1211-.BB40 3RQ1000-.LW00
3SK1211-.BB00
3SK1211-.BW20
Utilization category Ue (V) Ie (A) B10
d
value
(operating cycles)
Electrical endurance
of safety-related outputs
(typical)
AC-1 240 5 500,000 85,000
4 860,000 140,000
2 1,300,000 210,000
AC-15 240 4 300,000 50,000
3 850,000 85,000
1 1,100,000 120,000
DC-13 24 5 300,000 50,000
2 2,000,000 230,000
1 7,000,000 1,100,000
DC-1 24 5 500,000
Technical data
12.2 Electrical endurance
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
192 Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005