8500 Series Subminiature Pushbutton Switches, available pre-travel or over-travel models, ratings up to 3 AMPS, reliable contact design, RoHS compliant, typical applications include detection, telecommunications and networking equipment, computers and peripherals.
The C&K 8500 Series subminiature pushbutton switches are designed for detection, telecommunications, networking equipment, computers and peripherals. They are available with pre‑travel or over‑travel actuation, and support both 1 A and 3 A current ratings depending on the model.
Key specifications include contact ratings of 1 A (853X) or 3 A (855X) at 120 V AC or 28 V DC, electrical life up to 250,000 actuations for 853X models, contact resistance below 30 mΩ, insulation resistance of 10⁹ Ω, dielectric strength of 1,000 V rms, and an operating temperature range of –30 °C to 65 °C. Options cover various contact materials (Q, B, G), terminal finishes, plunger types, and panel‑mount configurations, all RoHS compliant.
| Contact rating (853X) | 1 A @ 120 V AC or 28 V DC |
|---|---|
| Contact rating (855X) | 3 A @ 120 V AC or 28 V DC |
| Electrical life (853X) | 250,000 actuations at full load |
| Electrical life (855X) | 10,000 actuations at full load |
| Contact resistance | < 30 mΩ typical |
| Dielectric strength | ≥ 1,000 V rms |
| Operating temperature | –30 °C to 65 °C |
| Case material | Glass filled phenolic or diallyl phthalate (UL 94V‑0) |
| Plunger material | Phenolic or glass filled polyester, black (UL94V‑0) |
The 853X models are rated for 1 A, while the 855X models are rated for 3 A, both at 120 V AC or 28 V DC.
The 853X models provide an electrical life of 250,000 actuations at full load.
Yes, any models supplied with Q, B, or G contact material are RoHS compliant.
The switches operate from –30 °C up to 65 °C.