Omron D4MB-431 | Omron Limit Switch

Description The D4MB-431 is a high-durability limit switch engineered for industrial applications requiring reliable mechanical actuation and robust environmental resistance. It features multiple plungers, IP67-rated jet-proof construction, and a long mechanical life cycle. Technical Specifications Condition New/Never Used Surplus Brand Omron Category Switches Part Number D4MB-431 Subcategory Limit Switches Rated Voltage 125/250 VAC, 125/250 VDC Current Rating 10 A (AC), 0.8 A (125 VDC), 0.4 A (250 VDC) Inrush Current NC: 30 mA max, NO: 20 A max Operating Speed 0.05 mm/s to 0.5 m/s Mechanical Frequency 120 operations/min Electrical Frequency 30 operations/min Contact Resistance 25 mΩ max (initial) Insulation Resistance 100 MΩ min. (at 500 VDC) Dielectric Strength 1,000–1,500 VAC depending on section Ambient Operating Temperature –10°C to 80°C Ambient Humidity 95% max Enclosure Rating IP67, Jet-proof (JIS) Dimensions (W x H x D) 20 × 14 × 14 cm Weight 960 g Information About D4MB-431 The D4MB-431 is part of Omron’s heavy-duty limit switch lineup, offering a mechanical life of over 10 million operations, making it ideal for repetitive actuation in industrial environments. With support for both AC and DC currents, it can handle 10 A at 250 VAC and up to 0.8 A at 125 VDC. The switch incorporates four plungers and operates over a wide speed range from 0.05 mm/s to 0.5 m/s. It maintains stable operation under mechanical frequencies up to 120 ops/min and electrical up to 30 ops/min. Designed to withstand shocks up to 100G and vibration up to 1.5 mm at 10–55 Hz, the D4MB-431 ensures reliable performance in harsh conditions. The unit features reinforced insulation, high dielectric strength, and reliable contact resistance, all housed in an enclosure compliant with IP67 for dust and water protection. Key Features: Wide Electrical Ratings: Handles 10 A at 125/250 VAC and 0.8 A at 125 VDC, providing flexibility across voltage types and circuit applications. Durable Mechanical Performance: Offers over 10 million mechanical operations and up to 500,000 electrical operations, ensuring long-term endurance in automated systems. Shock and Vibration Resistant: Designed to withstand 100G shock (destruction) and 20G (malfunction), along with vibration frequencies from 10 to 55 Hz, making it suitable for rugged environments. Jet-Proof Protection: IP67 and JIS-compliant construction allows use in settings exposed to dust and water jets, increasing reliability and maintenance-free operation. Multiple Actuation Points: Includes four plungers for diverse mechanical triggering options, accommodating complex automation needs or multi-directional sensing. Stable Operating Conditions: Maintains consistent performance in ambient temperatures from –10°C to 80°C and humidity up to 95%, ensuring robust operation across seasonal extremes. High Inrush Current Capability: Supports up to 20 A inrush for NO contacts, which is useful during equipment start-up or load switching. Compact and Heavy: Compact dimensions (20 × 14 × 14 cm) with substantial build quality at approx. 960 g, giving it both space-efficiency and mechanical strength. The D4MB-431 provides reliable contact operation, high shock tolerance, and long mechanical life for demanding industrial automation systems.