Tai-Hao APC series
|This article requires additional photographic illustration — mounted switch, and detailed photos of the internals suitable for recognition purposes|
|Switch type||Clicky; tactile; linear|
|Sense method||Metal leaf|
|Actuation force||45, 55, 65 and 75 cN|
|Keycap mount||Alps mount|
|Switch mount||Plate mount|
APC switches have the same approximate shell design as other four-tab clone switches. Internally they are very similar to other Alps clone switches, with the current generation of switches using the same narrow copper-based click leaf.
According to Tai-Hao, the APC series was introduced a year or two after Tai-Hao Aruz, which has a confirmed sighting of 1989. It was previously misunderstood that the APC series was introduced in 1984 or 1985, but 1990 or 1991 is consistent with the apparent appearance of Alps clone switches around this time.
The contact design of APC is derived from that of the Aruz switch. It remains uncertain whether Hua-Jie AK series or Tai-Hao APC series arrived first; it is however confirmed that Himake were involved with the Aruz switch, and both switch series started out extremely similar.
Specification for current, unbranded switches:
|Bounce time||< 10 ms|
|Total travel||4.5−0.5 mm|
|Operating force||45±10 gf, 55±10 gf, 65±10 gf, 75±10 gf|
|Lifetime||20 M cycles|
Front contact plate
Square, with one finger, and top and bottom reinforcement recesses; almost identical to that of the Simplified Alps Type IV switch
Click leaf (newer)
Narrow, copper-coloured "mantis" click leaf
A Packintell Electronics–branded Key Mouse keyboard registered with the FCC in 1989 has been found with a mixture of branded and unbranded switches, giving a rough idea of when the branding was removed. The keyboard's manufacture date is not known.
These are the production switches. All switches have the typical narrow copper-based click leaf. The only known tactile variant (APC BSW 045WHN) uses a modified click leaf with shallower angles on the hooks to allow the slider to pass without generating a click.
|Part number||Slider colour||Type||Force|
|APC BSW 045WH||Blue||Clicky||45 cN|
|APC BSW 045WHN||Red||Tactile||45 cN|
|APC BSW 055WH||Teal||Clicky||55 cN|
|APC BSW 055WHN||Brown||Linear||55 cN|
|APC BSW 065WH||White||Clicky||65 cN|
|APC BSW 065WHN||Black||Linear||65 cN|
|APC BSW 075WH||White||Clicky||75 cN|
|APC BSW 075WHN||Black||Linear||75 cN|
|Part number||Slider colour||Type||Force||Notes|
|APC BSW 070WH||White||Clicky||70 cN|
|APC BSW 070WHN||White?||Linear||70 cN||Assumed to have existed|
BSW 045WHN is a 45 cN tactile switch. Tactility is achieved by straightening the hooks on the click leaf, such that the slider passes it without pulling it forward. This gives a level of tactility somewhere in the region of half of that of Cherry MX Brown, and the switch does not click. In contrast, SMK second generation switches achieved the same effect by chamfering the slider and using a virtually identical click leaf to that found in their clicky switches.
- AZiO Levetron Clicker KB528U
- Clicker F21-7D
- Some KPT KPT-84 keyboards
- Packintell-branded Key Mouse keyboard
- Rosewill Striker RK-6000 (Teal Switch)
- Wintek-WK-750 (APC BSW 055WH stated on the product box)
- Conversation with Tai-Hao
- Deskthority — ALPS what type?
- KBtalKing — ㊣ALPS軸類零組件比較㊣ (Chinese only) Dated 2009-05-24. Retrieved 2015-07-23.
- Geekhack — New guy needs help identifying keyboard & Alps-like sliders Posted 2010-07-04. Retrieved 2015-07-23.
- KBtalKing — ★★Wintek-WK-750類ALPS軸(藍軸)★★ (Chinese only) Dated 2011-11-01. Retrieved 2015-07-23.