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Siemens SMB21
AC 220 V, 2 position spring return damper actuator. Replacement unit is GCA321.1E, AC 230 V, 2 position, 18 Nm rotary damper with spring return. If auxiliary switches are required use the GCA326.1E.
Replacement: GCA321.1E
Please check the technical data of the replacement product exactly, a 1: 1 replacement is not always possible.
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