The document introduces the general specifications and other rated parameters of NKK Switches' UB2 series slim button switch L82 and illuminated button switch L83, including electrical capacity, contact resistance, insulation resistance, dielectric strength, mechanical life, electrical life, nominal operating force, etc. It also provides information on materials and coatings, environmental data, installation, handling, standards and certifications.
The NKK UB2 series thin flat button switch manual provides detailed electrical and mechanical specifications, environmental limits, and certification information. It includes data on contact resistance, insulation strength, mechanical and electrical life, and operating forces for both single‑pole and double‑pole versions.
Installation guidelines cover mounting force, soldering methods, cleaning procedures, and optional accessories. The document also lists ordering codes, LED options, and printable areas for custom branding. This manual is written in Chinese.
| Maximum current rating | 5 A at 125/250 V AC or 5 A at 30 V DC |
|---|---|
| Contact resistance (silver) | max 50 mΩ |
| Contact resistance (gold) | max 100 mΩ |
| Insulation resistance | ≥200 MΩ at 500 V DC |
| Insulation strength | ≥1 000 V AC between contacts for ≥1 min |
| Mechanical life (momentary type) | ≥1 000 000 operations |
| Electrical life (silver contacts) | ≥10 000 operations |
| Operating force (single‑pole) | 1.90 N |
| Operating force (double‑pole) | 2.55 N |
| Travel | Pre‑travel 0.067 in (1.7 mm), Over‑travel 0.024 in (0.6 mm), Total 0.091 in (2.3 mm) |
| Operating temperature range | -25 °C to +50 °C |
The UB2 switch is rated for 5 A at 125/250 V AC or 5 A at 30 V DC.
Silver contacts have a maximum resistance of 50 mΩ, while gold contacts have a maximum of 100 mΩ.
The momentary type is rated for at least 1 000 000 mechanical operations.
It can operate from –25 °C up to +50 °C.