7  Electro-magnetic compatibility (EMC)  Issue 07/04 
  MICROMASTER 420    Operating Instructions 
172  6SE6400-5AA00-0BP0  
Table 7-5  Compliance Table 
Model Remarks 
Class 1 – General Industrial 
6SE6420-2U***-**A0  Unfiltered units, all voltages and powers. 
Class 2 – Filtered Industrial 
6SE6420-2A***-**A0  All units with integral Class A filters 
6SE6420-2A***-**A0 with 
6SE6400-2FA00-6AD0 
Frame size A units 400-480 V with external Class A footprint filters 
Class 3 – Filtered for residential, commercial and light industry 
6SE6420-2U***-**A0 with 
6SE6400-2FB0*-***0 
Unfiltered units fitted with external Class B footprint filters. 
* denotes any value is allowed.