Littelfuse MDSR-4 Reed Switch, SPST-NO, 200V DC, 500mA

The Littelfuse MDSR-4-22-38 is a reliable Single Pole, Single Throw, Normally Open (SPST-NO) reed switch designed for precise sensing and switching applications. Featuring axial contacts and a through-hole mounting design, it is engineered for straightforward integration into printed circuit boards, providing a dependable and compact solution for controlling low-power circuits.

Constructed to meet industrial standards, this reed switch offers a maximum switching capability of 200V DC and 500mA, with a peak switching power of 10W. Its low contact resistance of just 0.1 ohm ensures efficient operation and minimises power loss, making it an energy-efficient choice for sensitive electronic control systems. The switch activates within a specific magnetic field strength range, with operate points between 22 and 38 Ampere-Turns (AT), allowing for consistent and predictable performance in the presence of a magnet.

Key Features & Specifications

• Contact Configuration: SPST-NO (Single Pole, Single Throw, Normally Open)
• Maximum Ratings: 200V DC, 500mA contact current, 10W switching power
• Low Contact Resistance: 0.1 ohm maximum for high efficiency
• Precise Activation: Operate range of 22 AT to 38 AT
• Mounting Type: Through-hole for secure PCB installation
• Compact Dimensions: 43mm (H) x 33mm (W) x 15mm (D)
• Lightweight Design: Weighs just 0.182 grams

Ideal for a variety of industrial and electronic projects, the MDSR-4 reed switch is a fundamental component for creating reliable, magnetically-activated circuits. Its robust construction and specified electrical characteristics make it a trusted choice for designers and engineers seeking a high-performance switching solution.