3305 Series Open Bottom Low-Profile Receptacles

Mill-Max’s 3305 series open bottom, low-profile, solder mount receptacles are specifically designed to make mechanical key switches hot-swappable. The 3305 series is designed to be soldered into a 0.060” (1.50 mm) minimum mounting hole with an ultra-thin retention shoulder so plugged-in components sit nearly flush to the board surface. The open bottom design is meant to accommodate varying lead lengths making this a very versatile receptacle.

The 3305 series offers three length options of 0.105” (2.67 mm), 0.130” (3.30 mm), and 0.155” (3.94 mm), all with an above-board height of 0.010” (0.25 mm), providing the low-profile desired for optimal switch height and functioning. Furthermore, while these receptacles are compact in size, high-quality materials make these easy-to-use parts reliable and long-lasting. The 3305 series receptacles utilize a beryllium copper contact clip to make dependable, low resistance connections with mated leads and maintain those high-quality connections after thousands of cycles (plug/unplug).

The 3305 series accepts round leads of 0.025” to 0.037” (0.635 mm to 0.940 mm) in diameter as well as square and rectangular leads (0.019” to 0.026” square), typical of the leads found on most keyboard switches.