You may see a suffix after the standard catalog number ie. FD3020L. Below is a list of the suffix codes you will come across.
E = 100% Protected (4-Pole only) Neutral Pole
EH = 50% Protected (4-Pole only)
K = High Magnetic Molded Case Switch
L = Line and Load Terminals
S = Stainless Steel Terminals
V = 50°C Calibration
W = Without Terminals
Y = Line Terminals Only
Z = Aluminum Terminals (≤ 100 Amperes)
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