Fujitsu FKB4800 Series
Contents
Overview
Fujitsu’s FKB480 Series is an uncommon Fujitsu series. These are rubber dome keyboards whose plungers bear a resemblance to toilets.
Specifications
The specifications from the Electronic Engineers Master Catalogue 1991–92 are as follows:
| Travel | 3.8±0.5 mm |
|---|---|
| Operating force | 55±25 gf |
| Tactile response | 20 gf |
| Contact resistance | 20 gf |
| Lifetime | 500 Ω max (DC 5 V, 1 mA) |
The force and travel figures are the same as for FKB4700 Series but the switch lifetime is reduced by two thirds.
FKB4700 and FKB4800 are both said to have “F key rollover”.
Models
FKB4804-103 is partially documented on the Deskthority wiki. Photos previously existed of model FKB4811-103, but the site on which they lived has been shut down.
Documentation
All material was scanned by Bitsavers unless otherwise noted.
- FKB 4700 Series and FKB 4800 Series advertisement, Electronic Engineers Master Catalog 1991–92 Volume B