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33661 & S33661By : Ankita - 27-Oct-2018 
What are the differences between 33661 and S33661?
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33661 voltage release is a component of the S33661 shunt trip, which also includes USA packaging and instructions. The box for S33661 will have that number on it but the shunt trip itself will only have 33661. The same product is used for UL and IEC applications.