BTC 5100

From Deskthority wiki
Jump to navigation Jump to search
Template icon--Illustration.png This article requires additional photographic illustration — need photos of the other variants

This article is a stub. You can help Deskthority by expanding it.

BTC 5100
Manufacturer BTC
Features Embedded numeric keypad
Layouts 80/81-key compact ANSI-derived
Keyswitches BTC foam and foil (tactile)
BTC dome with slider (PCB/membrane)
Interface AT/PS/2
Dimensions 297 x 152 x 30 mm (5100C)
Weight 0.7 kg (5100C)

BTC 5100 is a series of compact keyboards from BTC.


The keyboard is 14.5 units wide. The top row of keys—including the function keys—are all reduced in size, to approximately 85% of their normal size (fitting 17 keys across the keyboard).

The various key sizes are as follows:

  • Space: 5 u
  • Fn, Ctrl, Alt: 1.5 u each
  • Backspace: 1.5 u
  • Enter: 1.75 u
  • Right Shift: 1.25 u
  • Function row: 0.853 u

Due to the compact size of the keyboard, the keyboard controller resides on a daughterboard placed underneath the switch PCB.

The date of introduction is not known. The capacitive version depicted below is dated 1992. The version 1.00 manual for the BTC 5100C is dated 17th of February 1997, suggesting that the capacitive version was replaced or complemented by the conductive version in 1997.


The specifications for the "5100" are given as follows:[1]

Dimensions 297 × 151 × 39 mm
Weight 0.65 kg
Switch activation mechanism Conductive rubber
Travel 3.5±0.5 mm
Tactile force 55±20 g

The mention of conductive rubber implies that the page is describing the 5100C and not the original 5100.

The 5100C manual gives the following specifications:

Dimensions 297 × 152 × 30 mm
Weight 0.7 kg
Travel 3.8±0.2 mm
Pretravel 0.9±0.2 mm
Lifetime 10M
Tactile force 55±8 g


Uses tactile BTC foam and foil switches; FCC ID is E5X5R5BTC-5100[2]
This is the best-known version, with conductive domes over a PCB. It is perhaps known better as the SIIG MiniTouch Plus. Found in both beige (AKA ivory) and black.[1] FCC ID is E5X5R5BTC-5100C. There are slight differences between the AT version and the PS/2 version: the AT has looser, well-lubed sliders and a snappier/louder key press. It also may use ever so slightly snappier domes but the difference is very minimal. In comparison the PS/2 version has tight scratchy sliders and a muted sound, possibly due to a thicker top housing.
Membrane rubber dome
Same sliders as the earlier revisions, but with standard (pressure) membranes[Citation needed]
Flytech Carry I keyboard is a rebadged 5100 with a revised shell that was registered separately with the FCC by Flytech


The PCB of this example is dated week 13, 1992.



External links