This document provides information about the general specifications, rated parameters, materials and coatings, environmental data, installation, standards and certifications of NKK Switches UB series slim button switches and L illuminated button switches.
This document describes the UB series thin flat button switches, covering electrical ratings, mechanical life, and mounting options. It includes tables of rated current, voltage, power dissipation, contact resistance and environmental limits.
Installation guidance shows how to mount the printed circuit board, connect terminals, and select the appropriate LED color and housing type. Safety notes and cleaning procedures are also provided. This manual is written in Japanese.
| Rated Current | 5 A |
|---|---|
| Maximum Power Dissipation | 0.4 W at 28 V AC/DC |
| Contact Resistance (Silver) | ≤ 50 mΩ |
| Contact Resistance (Gold) | ≤ 100 mΩ |
| Mechanical Life (Single‑pole) | ≥ 1 000 000 operations |
| Mechanical Life (Double‑pole) | ≥ 200 000 operations |
The UB series switches are rated for 5 A at 125/250 V AC or 5 A at 30 V DC.
The maximum power dissipation is 0.4 W when operated at up to 28 V AC/DC.
A single‑pole UB switch is rated for at least 1 000 000 operations.
Silver contacts have a maximum resistance of 50 mΩ, while gold contacts are limited to 100 mΩ.