Siemens SIRIUS System Manual

3RU11, 3RB10, and 3RB12 overload relays
SIRIUS System Manual
4-6
GWA 4NEB 430 0999-02b
4.2.2 General device description
The 3RU11 and 3RB10 overload relays are electrically and mechanically com-
patible with the 3RT10 contactors and 3RW30/31 soft starters in the corre-
sponding frame size.
Frame sizes
The 3RU11 thermal overload relays and the 3RB10 electronic overload relays
are available in 4 frame sizes:
• Frame size S00: width 45 mm; up to 12 A
• Frame size S0: width 45 mm; up to 25 A
• Frame size S2: width 55 mm; up to 50 A
• Frame size S3: width 70 mm; up to 100 A
The 3RB12 electronic overload relay is available with the following dimen-
sions:
• 3RB12 46: width 70 mm; up to 100 A
• 3RB12 53: width 120 mm; up to 205 A
• 3RB12 57: width 145 mm; up to 500 A
• 3RB12 62: width 230 mm; up to 820 A
3RU11
S00 S0 S2
Figure 4-1: 3RU11 overload relays (frame sizes S00 to S2)
S3
Figure 4-2: 3RU11 overload relay (frame size S3)
3RB10
The construction of the 3RB10 is the same as that of the 3RU11.
9
5
9
6
9
7
9
8
9
5
9
6
9
7
9
8

Siemens SIRIUS Specifications

General

Product brand name	Siemens
Series	SIRIUS
Coil Voltage	24V DC, 110V AC, 230V AC
Switching Capacity	Up to 10A
Mounting Type	DIN rail
Product designation	SIRIUS
Contact Material	Silver alloy
Contact Rating	Varies depending on the specific SIRIUS relay model (e.g., 6 A at 250 V AC, 10 A at 250 V AC)
Switching Voltage	Varies depending on the specific SIRIUS relay model (e.g., 250 V AC, 400 V AC)
Mechanical Life	Up to 10 million operations
Electrical Life	Up to 100, 000 operations
Operating Temperature	-25°C to +55°C
Protection Class	IP20
Size of relay base	Varies depending on the specific SIRIUS relay model