Siemens SIRIUS 3RU Manual page 190

Dimension drawings (dimensions in mm)
C.4 Dimension drawings for 3RB30/3RB31 electronic overload relays
3RB3.4.-..B0 (S3, screw connection, contactor mounting)
Figure C-34 3RB3.4.-..B0
3RB3.4.-..B0 (S3, screw connection, mounting on stand-alone assembly support)
Figure C-35 3RB3.4.-..B0 and 3RU2946-3AA01
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SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003