Whether you’re designing solutions for automotive, consumer or industrial systems, the space available continues to get smaller. But the challenges, including the needs for low power consumption and high-speed switching of control and position sensing signals, continue to grow. You also need devices that are robust and easy to integrate. Now, you can turn to the new 59177 Series ultra-miniature overmolded reed switches from Littelfuse that deliver solid performance with low power consumption in a space-saving configuration and solve vexing design challenges for level monitoring, position sensing, tamper detection, and similar functions. They are suited for diverse applications like security systems, consumer appliances, metering, process monitoring, and battery-powered devices.
The low profile gives you a new option for solving design challenges in applications that need to switch up to 170 Vdc and up to 0.25 A at 10W, maximum, or 120 Vac and up to 0.18 A, at 10 volt-amperes (VA), maximum. When closed the maximum contact resistance is only 220 mΩ. Quick reaction times are often needed, and the 59177 series delivers. These switches close in a maximum of 0.5 ms (including bounce) and have a release (opening) time of 0.2 ms, maximum, both according to EIA/ NARM RS-421-A. Even though they can quickly switch high power levels, standby and operating power consumption is zero, so is leakage current when the switch is off, you can’t get lower. The 59177 series reed switches can help you maximize the operating time of battery-powered Internet of Things (IoT) designs and meet the most demanding standby power requirements for ac-line operated devices. Robust and reliable These switches are rated for operation from -40 to 125°C. The thermoset over mold material enhances the overall robustness and durability, and the inward formed J-shaped leads contribute to improved mechanical resilience and minimize concerns
Low profile, big performance
The new low-profile design is key. The 59177 series is only 9 mm high, over 20% thinner than the 11.43 mm height of previous reed switches. Overall dimensions of these Form A single-pole single-through normally-open (SPST-NO) switches are 9.0 mm x 2.5 mm x 2.4 mm (0.354”x 0.098‘’x 0.094‘’) with inward formed J-shaped leads that support compact solutions (Figure 1).
Figure 1: From the compact package outline to the lead structure, 59177 series reed switches are designed to solve difficult position sensing challenges. (Image source: Littelfuse)
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