Siemens 3RU21 & 3RU11 Overload Relays

Siemens 3RU21 3RU11 & 3RU20 Overload Relays

Siemens 3RU thermal overload relays are designed for the protection of three-phase and single phase AC and DC motors.
Siemens 3RU thermal overload relays up to 100 A are designed for current-dependent protection of applications with normal start-up conditions.

Please contact Tech Controls for Price and availability
on the entire line of Siemens Overload Relays
mark@techcontrols.com or 678-205-0594
Siemens 3RU overload relaysSiemens 3RU1136 3ru1146 overload relays
Frame Size S00 For use on Siemens Contactors 3RT201 
Part Number  Amp Range Part Number Amp Range
3RU2116-0AB0 .11-.16 3RU2116-1AB0 1.1-1.6
3RU2116-0BB0 .14-.20 3RU2116-1BB0 1.4-2
3RU2116-0CB0 .18-.25 3RU2116-1CB0 1.8-2.5
3RU2116-0DB0 .22-.32 3RU2116-1DB0 2.2-3.2
3RU2116-0EB0 .28-.40 3RU2116-1EB0 2.8-4
3RU2116-0FB0 .35-.50 3RU2116-1FB0 3.5-5
3RU2116-0GB0 .45-.63 3RU2116-1GB0 4.5-6.3
3RU2116-0HB0 .55-.80 3RU2116-1HB0 5.5-8
3RU2116-0JB0 .70-1 3RU2116-1JB0 7-10
3RU2116-0KB0 .90-1.25 3RU2116-1KB0 9-12.5
Frame Size S0 For use on Siemens Contactors 3RT202
Part Number  Amp Range Part Number Amp Range
3RU2126-1CB0 1.8-2.5 3RU2126-1AB0 11-16
3RU2126-1DB0 2.2-3.2 3RU2126-4BB0 14-20
3RU2126-1EB0 2.8-4 3RU2126-4CB0 17-22
3RU2126-1FB0 3.5-5 3RU2126-4DB0 20-25
3RU2126-1GB0 4.5-6.3 3RU2126-4NB0 23-28
3RU2126-1HB0 5.5-8 3RU2126-4EB0 27-32
3RU2126-1JB0 7-10 3RU2126-4PB0 30-36
3RU2126-1KB0 9-12.5 3RU2126-4FB0 34-40
Frame Size S2 For use on Siemens Contactors 3RT103 
Part Number  Amp Range Part Number Amp Range
3RU1136-1HB0 5.5-8 3RU1136-4DB0 18-25
3RU1136-1JB0 7-10 3RU1136-4EB0 22-32
3RU1136-1KB0 9-12.5 3RU1136-4FB0 28-40
3RU1136-4BB0 14-20 3RU1136-4GB0 36-45
Frame Size S3 For use on Siemens Contactors 3RT104 
Part Number  Amp Range Part Number Amp Range
3RU1146-4DB0 18-25 3RU1146-4JB0 45-63
3RU1146-4EB0 22-32 3RU1146-4KB0 57-75
3RU1146-4FB0 28-40 3RU1146-4LB0 70-90
3RU1146-4HB0 36-50 3RU1146-4MB0 80-100
Frame Size S6 For use on Siemens Contactors 3RT105
Part Number  Amp Range Part Number Amp Range
3RB2056-1FC2 50-200 3RB2056-1FW2 50-200
3RB2056-2FC2 50-200 3RB2056-2FCW2 50-200
Frame Size S10/S12 For use on Siemens Contactors 3RT106/3RT107
Part Number  Amp Range Part Number Amp Range
3RB2066-1GC2 55-250 3RB2066-1MC2 160-630
3RB2066-2GC2 55-250 3RB2066-2MC2 160-630