Siemens SIRIUS 3RU2 Manual page 156

Dimension drawings (dimensions in mm)
C.1 Dimension drawings for 3RU21 thermal overload relays
3RU2136-..D0 (S2, spring-loaded connection, contactor mounting)
Figure C-11 3RU2136-..D0
3RU2136-..D1 (S2, spring-loaded connection, mounting on stand-alone assembly support)
Figure C-12 3RU2136-..D1 and 3RU2936-3AA01
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SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
Manual, 09/2014, A5E03656507420A/RS-AA/002