MJTP1138D is an ultra-compact 6mm surface-mount momentary tactile pushbutton switch designed for high-reliability applications requiring excellent tactile feedback. The switch features a snap dome mechanism with a plunger travel of 0.25 mm (+0.2, -0.1 mm) and an actuation force of 160 grams ±30 grams, providing responsive user feedback. Electrically, it is rated for 50 mA at 12 VDC with a contact resistance of 100 milliohms maximum at 5 VDC and 10 mA, an insulation resistance of 100 megohms minimum at 100 VDC, and a dielectric withstanding voltage of 250 VAC for 1 minute. The switch offers an electrical life of 100,000 cycles minimum with contact bounce less than 10 milliseconds, and operates reliably across a temperature range of -20°C to +70°C. With molded-in terminals that minimize flux wicking, silver-plated brass terminals, and phosphor bronze or stainless steel shorting contacts, this switch is ideal for consumer electronics, industrial controls, and portable devices where compact size and long-term reliability are essential.