Pressure switch MDR 4 S

Product catalog summary

Overview: The document provides detailed specifications and options for the MDR 4 series pressure switches, including the MDR 4, MDR 4S, MDR 4SD, and MDR 4SU models. These switches are designed for high-performance applications and comply with EN 60947 standards.

Specifications:

3-Phase Switching Capacity: 4.0 / 5.5 kW for MDR 4 and MDR 4S; 2.5 / 4.0 kW for MDR 4SU.
Max Cut-Out Pressure: 16 bar for MDR 4 and MDR 4SU; 11 bar for MDR 4SD.
Construction: 3-pole (normally closed or open), die-cast aluminum flange.
Compliance: EN 60947.

Technical Data:

Rated Insulation Voltage: 500 V.
Motor Switching Capacity: Varies by model and voltage, up to 5.5 kW at 400 V (3~).
Electrical and Mechanical Life: Over 100,000 electrical cycles and 500,000 mechanical cycles.
Protection Degree: IP 44.
Temperature Range: Air: -5 to +80°C; Water: up to +80°C.

Accessories:

Unloader Valves: Various models including EV 4, EV 4s, AEV 4, with options for screw or quick-connect fittings.
Cable Glands: Options include strain relief and cable support.
Mounting Brackets: MW 4 for wall mounting.
Covers: Available with or without rotary knobs, transparent options for MDR 4SD.

Ordering Information: Detailed part numbers and specifications for each model variant, including pressure range, flange type, and weight.

Catalog excerpts

Pressure switch MDR 4 S 3-phase Switching capacity 4.0 / 5.5 kW Max. cut-out pressure 16 bar 3-pole (N.C.) Acc. to EN 60947 4-way-flange (optional) Flange = die-cast aluminium Unloader valves and cable glands for retrofitting, see accessories!

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3-phase Switching capacity 4.0 / 5.5 kW Max. cut-out pressure 11 bar With scale and transparent cover 3-pole (N.C.) Acc. to EN 60947 Flange = die-cast aluminium Unloader valves and cable glands for retrofitting, see accessories!

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Dimensions MDR 4 technical Data MDR 4 s / MDR 4 sD acc. to EN 60947 Diaphragm media resistance MDR 4 Diaphragm media resistance MDR 4 A detailed overview of diaphragm media resistance for all pressure switches can be found on page 22. Please read the information carefully.

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