M (E3.1) 1/2023 page 117/136
22.3 Over current protection
Single-phase devices are protected by two miniature fuses against over current, accessible from the out-
side. The miniature fuses are located at the rear of the chamber above the power cable connection. Each
fuse holder is equipped with a fuse clip 5mm x 20 mm. A fuse may be replaced only with a substitute of the
same ratings. Refer to the technical data of the respective device type.
Three-phase devices are equipped with an internal miniature circuit breaker.
22.4 M technical data
Height, gross (incl. feet)
Depth, gross (incl. door handle and
exhaust duct)
mm / inch
648 / 25.51 690 / 27.17 840 / 33.07 870 / 34.25
Wall clearance rear (minimum)
Wall clearance side (minimum)
Exhaust duct, outer diameter
Quantity of racks (regular)
Max. load per rack (standard rack)
Max. load per rack (optional perfo-
rated shelf)
Kg / lbs 35 / 77 35 / 77 35 / 77 35 / 77
Max. load per rack (optional heavy
load rack)
Kg / lbs --- --- 70 / 154 70 / 154
Permitted total load, with reinforced
inner chamber option
Kg / lbs 85 / 187 170 / 375 300 / 661 350 / 772