375
375
375
Overload Relays
Screw Terminals
Trip Type Class 5, 10, 20 and 30 Adjustable
Overload Protection, Phase Failure Protection
and Unbalance Protection
Internal Ground-Fault Detection
(Requires Activation)
The 3RU11/3RU21 thermal overload relays are designed for the protection of three-phase and single-phase AC and DC
motors. If single-phase AC or DC loads are to be protected using 3RU11/3RU21 thermal overload relays, all three bimetal
strips should be heated. Therefore all main circuits must be connected in series.
TEST Function
STOP Button
Class 10
Screw Terminals
Auxiliary Contacts: 1 NO + 1 NC
Manual/Automatic RESET
Switching Position Indication
The 3RB31 solid-state overload relays are suitable for customers from
all industries who want to guarantee optimum inverse-time delayed
protection of their electrical loads (e.g. motors) under normal and heavy
starting conditions (CLASS 5 to CLASS 30 selectable), minimize project
completion times, inventories and power consumption, and optimize
plant availability and maintenance management.
ENCLOSURES
MOTOR CONTROLS,
DRIVES & CONTACTORS
Contactor
Size
EACH
70240124
70240130
70240122
70240127
70240123
70240128
70240125
70240131
70240126
70240129
70240132
3RB31134RB0
3RB31234RB0
3RB31134NB0
3RB31234NB0
3RB31134PB0
3RB31234PB0
3RB31134SB0
3RB31234SB0
3RB31134TB0
3RB31234QB0
3RB31234VB0
0.10-0.40
0.10-0.40
0.32-1.25
0.32-1.25
1.00-4.00
1.00-4.00
3.00-12.00
3.00-12.00
4.00-16.00
6.00-25.00
10.00-40.00
S00
S0
S00
S0
S00
S0
S00
S0
S00
S0
S0
152.80
164.33
152.80
164.33
152.80
164.33
152.80
164.33
152.80
164.33
203.43
3RB2153-4FW2
Mfr.s
Type
Amps
Contactor
Size
EACH
70240106
70240107
70240109
70240108
70240120
70240121
3RB2133-4QB01
3RB2133-4UB01
3RB2143-4UB01
3RB2143-4EB01
3RB2153-4FC223
3RB2153-4FW224
6.0-25
12.5-50
12.5-50
25.0-100
50.0-200
50.0-200
S2
S2
S3
S3
S6
S6
181.21
243.40
405.66
405.66
279.81
291.45
Contactor
Size
EACH
70240147
70240148
70240149
70240150
70240151
70240152
70240153
70240154
70240155
70240156
70240157
70240158
70240159
70240168
70240160
70240169
70240161
70240170
70240162
70240171
70240163
70240172
70240164
70240173
70240165
70240174
70240166
70240175
70240167
70240176
70240177
70240178
70240179
70240182
70240180
70240181
70240183
3RU21160AB0
3RU21160BB0
3RU21160CB0
3RU21160DB0
3RU21160EB0
3RU21160FB0
3RU21160GB0
3RU21160HB0
3RU21160JB0
3RU21160KB0
3RU21161AB0
3RU21161BB0
3RU21161CB0
3RU21261CB0
3RU21161DB0
3RU21261DB0
3RU21161EB0
3RU21261EB0
3RU21161FB0
3RU21261FB0
3RU21161GB0
3RU21261GB0
3RU21161HB0
3RU21261HB0
3RU21161JB0
3RU21261JB0
3RU21161KB0
3RU21261KB0
3RU21164AB0
3RU21264AB0
3RU21264BB0
3RU21264CB0
3RU21264DB0
3RU21264NB0
3RU21264EB0
3RU21264FB0
3RU21264PB0
0.11-0.16
0.14-0.20
0.18-0.25
0.22-0.32
0.28-0.40
0.35-0.50
0.45-0.63
0.55-0.80
0.70-1.00
0.90-1.25
1.10-1.60
1.40-2.00
1.80-2.50
1.80-2.50
2.20-3.20
2.20-3.20
2.80-4.00
2.80-4.00
3.50-5.00
3.50-5.00
4.50-6.30
4.50-6.30
5.50-8.00
5.50-8.00
7.00-10.00
7.00-10.00
9.00-12.50
9.00-12.50
11.00-16.00
11.00-16.00
14.00-20.00
17.00-22.00
20.00-25.00
23.00-28.00
27.00-32.00
34.00-40.00
30.00-36.00
S00
S00
S00
S00
S00
S00
S00
S00
S00
S00
S00
S00
S00
S0
S00
S0
S00
S0
S00
S0
S00
S0
S00
S0
S00
S0
S00
S0
S00
S0
S0
S0
S0
S0
S0
S0
S0
44.43
44.43
44.43
44.44
44.43
44.43
44.43
44.43
44.43
44.43
44.43
44.43
44.43
62.88
44.43
62.88
44.43
62.88
44.43
62.88
44.43
62.88
44.43
62.88
44.43
62.88
44.43
62.88
44.43
62.88
62.88
62.88
62.88
97.47
97.47
97.47
97.47
OPTOELECTRONICS
Stock
No.
Amps
1Direct mounting with matching terminal blocks. 2Direct mounting with stand-alone installation. 3S6 with busbar connections.
4Equipped
Stock
No.
Mfr.s
Type
Size
EACH
70240146
70240184
70240185
3RU1936-3AA01
3RU29163AA01
3RU29263AA01
3RU11
3RU21, 3RB30, 3RB31
3RU21, 3RB30, 3RB31
S2
S00
S0
17.75
12.35
14.53
Stock
No.
Mfr.s
Type
Amps
Contactor
Size
For Use
With
Contactors
EACH
70240133
70240134
70240139
70240135
70240140
70240136
70240141
70240137
70240138
70240142
70240143
70240144
70240145
3RU1136-4BB0
3RU1136-4DB0
3RU1146-4DB0
3RU1136-4EB0
3RU1146-4EB0
3RU1136-4FB0
3RU1146-4FB0
3RU1136-4GB0
3RU1136-4HB0
3RU1146-4JB0
3RU1146-4KB0
3RU1146-4LB0
3RU1146-4MB0
14-20
18-25
18-25
22-32
22-32
28-40
28-40
36-45
40-50
45-63
57-75
70-90
80-100
S2
S2
S3
S2
S3
S2
S3
S2
S2
S3
S3
S3
S3
3RT103
3RT103
3RT104
3RT103
3RT104
3RT103
3RT104
3RT103
3RT103
3RT104
3RT104
3RT104
3RT104
63.46
63.46
91.30
79.02
91.30
79.02
91.30
87.43
87.43
99.67
111.23
125.38
159.47
INDEX
Terminal Brackets for Stand-Alone Installation of Overload Relays with Screw Terminals
For Separate Mounting of the Overload Relays; Screw and Snap-On Mounting onto TH 35 Standard Mounting Rail
ASSEMBLY
The 3RB21 solid-state overload relays have been designed for the protection of induction motors in sinusoidal 50/60 Hz
voltage networks. The relays are not suitable for the protection of single-phase AC or DC loads.
Mfr.s
Type
3RB2133-4UB0
The 3RB21 solid-state overload relays are suitable for customers from all industries who want to guarantee optimum inversetime delayed protection of their electrical loads (e.g. motors) under normal and heavy duty conditions, minimize project
completion times, inventories and power consumption, and optimize plant availability and maintenance management.
Stock
No.
INTERCONNECT
Mfr.s
Type
POWER
Stock
No.