Editing RAFI RS 76 M

{{infobox dswitch
| image name        = RAFI RS 76 M.jpg
| manufacturer      = [[RAFI]]
| product code      = 
| sense method      = [[Metal contact]]
| switch type       = Linear; progressive rate; latching action
| actuation force   = 
| introduced        = 1975
| discontinued      = 
| family            = [[RAFI full-travel key switch]]
| keycap mount      = [[RAFI mount]]
| switch mount      = [[PCB mount]]
| travel            = 4 mm
| bounce time       = 5 ms<br>10 ms (illuminated)
}}

'''RAFI RS 76 M''' is a series of metal contact switches in the [[RAFI full-travel key switch]] family. It is the mechanical counterpart to the Hall effect [[RAFI RS 76 C|RS 76 C]], and the 4 mm travel equivalent to [[RAFI RS 74 M|RS 74 M]]. The series comprises standard, illuminated and latching action switches, with linear and progressive rate feel depending on design.

==Design==
All RS 76 M switches are open top; the diode versions do use a switch top but it leaves most of the internals exposed regardless.

The non-illuminated switches are crosspoint contact. The perimeter loop movable contact used in this design leaves no room for internal LEDs, so the illuminated versions of the switch instead use a "bridge" contact: this comprises a horizontal flat metal bar that is lowered by the slider onto a pair of stationary contacts, one on either side of the switch. To allow for overtravel, this bar sits below a spring, and once it reaches the stationary contacts the slider continues to move, with the spring above the bar being compressed. This gives the switch a progressive rate [[force curve]], and the change in force is sharp enough that keys can be tapped light enough to actuate.

==Variants==
The RAFI Electromechanical Components 2001 catalogue provided part numbers for IP 40 and IP 65–rated switches; at present, only IP 40–rated switches are listed in RAFI catalogues. The separate part numbers for different LED colours are also no longer listed.

The series appears to be divided as follows:

*3.13.002.nnnn — IP40
*3.13.012.nnnn — IP65
*3.13.005.nnnn — with diode

{| class="wikitable variants-table"
! !! Sub-series !! Action !! IP rating !! Terminal force !! Part number
|-
| [[File:RAFI RS 76 M 502 -- variants table.jpg|175px]] || [[RAFI RS 76 M (basic)]]       || Momentary || IP 40 ||  90 cN || 3.13.002.502/0000 '''(2016)'''<br>3.13002.502 '''(2001)'''
|-
| [[File:RAFI RS 76 M 512 -- variants table.jpg|175px]] || [[RAFI RS 76 M (basic)]]       || Momentary || IP 40 || 140 cN || 3.13.002.512/0000 '''(2016)'''<br>3.13002.512 '''(2001)'''
|-
| [[File:No photograph.svg|175px]]                      || [[RAFI RS 76 M (basic)]]       || Momentary || IP 65 || 110 cN || 3.13012.502 '''(2001)'''
|-
| [[File:No photograph.svg|175px]]                      || [[RAFI RS 76 M (basic)]]       || Momentary || IP 65 || 160 cN || 3.13012.512 '''(2001)'''
|-
| [[File:RAFI RS 76 M 001 -- variants table.jpg|175px]] || [[RAFI RS 76 M (diode)]]       || Momentary || IP 40 ||  90 cN || 3.13.005.001/0000 '''(2016)'''<br>3.13005.001 '''(2001)'''
|-
| [[File:RAFI RS 76 M 011 -- variants table.jpg|175px]] || [[RAFI RS 76 M (diode)]]       || Momentary || IP 40 || 140 cN || 3.13.005.011/0000 '''(2016)'''<br>3.13005.011 '''(2001)'''
|-
| [[File:No photograph.svg|175px]]                      || [[RAFI RS 76 M (diode)]]       || Momentary || IP 65 || 110 cN || 3.13012.001 '''(2001)'''
|-
| [[File:No photograph.svg|175px]]                      || [[RAFI RS 76 M (diode)]]       || Momentary || IP 65 || 160 cN || 3.13012.011 '''(2001)'''
|-
| [[File:RAFI RS 76 M 102 -- variants table.jpg|175px]] || [[RAFI RS 76 M (illuminated)]] || Momentary || IP 40 || 100 cN || 3.13.002.102/0000 '''(2016)'''<br>3.13002.102/0000 '''(2001)'''
|-
| [[File:No photograph.svg|175px]]                      || [[RAFI RS 76 M (illuminated)]] || Momentary || IP 40 || 140 cN || 3.13.002.107/0000 '''(2001)'''
|-
| [[File:RAFI RS 76 M 022 -- variants table.jpg|175px]] || [[RAFI RS 76 M (illuminated)]] || Latching  || IP 40 || 100 cN || 3.13.002.022/0000'''(2016)'''<br> 3.13002.022/0000'''(2001)'''
|-
| [[File:RAFI RS 76 MX -- variants table.jpg|175px]]    || [[RAFI RS 76 MX]]              || Momentary || IP 40 || 100 cN || 3.13.002.922/0000 '''(2016)'''
|}

The RAFI Electromechanical Components 2001 catalogue also lists the following dedicated part numbers for the illuminated versions with LEDs fitted:

{| class="wikitable"
! Action    !! Terminal force !! LED colour !! Part number
|-
| Momentary || 100 cN         || Red        || 3.13002.102/1350
|-
| Momentary || 100 cN         || Yellow     || 3.13002.102/1450
|-
| Momentary || 100 cN         || Green      || 3.13002.102/1550
|-
| Momentary || 140 cN         || Red        || 3.13002.107/1350
|-
| Momentary || 140 cN         || Yellow     || 3.13002.107/1450
|-
| Momentary || 140 cN         || Green      || 3.13002.107/1550
|-
| Latching  || 100 cN         || Red        || 3.13002.022/1350
|-
| Latching  || 100 cN         || Yellow     || 3.13002.022/1450
|-
| Latching  || 100 cN         || Green      || 3.13002.022/1550
|}

[[Category:RAFI switches]]