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Cherry M8, MD and MJ variants

The following page lists confirmed Cherry M8, MD and MJ part numbers: not all possible variants were necessarily produced.

See also the Serie M8 schema.

Contents

Catalogue types

The following types were listed in catalogues. Not every type is known to have been produced and purchased. The catalogues and other documents are as follows:

1982
Cherry Keyboards and Switches Catalogue 1982 (Germany); see the Deskthority wiki
1985 EEM
Cherry keyboards, keyswitches and displays advertisement, Electronic Engineers Master Catalogue 1985–86 Volume B
1998
M81 and M84 pages from an unspecified 1998 catalogue (see Cherry switches on the Greendich website)
2013 EOL
M8 end-of-life notification, 31st July 2013
Part 1982 1985 EEM 1998 2013 EOL
M81A-0100
M81A-01R0
M81A-01G0
M81A-01Y0
M81A-0200
M81A-0700
M81A-1300
M81A-1400
M81B-0300
M81B-0400
M81C-0100
M81C-0200
M81C-0700
M81C-1100
M81C-1400
M81C-1700
M81D-0300
M81D-0400
M81E-0500
M81E-05R0
M81E-0600
M81F-0500
M81F-0600
M81F-1500
M81F-1600
M81G-0100
M81G-0200
M81H-0500
M81H-0600
M82A-0100
M82A-1100
M82C-0100
M82E-0500
M82E-0600
M82E-1500
M82E-1600
M84A-0100
M84A-01R0
M84E-0500
M84E-05R0
M84E-0600
M84E-1500
M84E-1600
M84F-0500
M84F-1500
M84G-0100
M84H-0500

Known variants

M8

Two of the German custom types found in the last-buy notification for M8 had “O” in position five, which has been changed to “0” in each instance on the basis that these were transcription errors. For M82A-1GEO, the final character is left as “O” as all other custom types have letters in the final two positions.

The details for switches marked “German custom part data” came from a spreadsheet from Cherry from May 2023 and the details were unclear and may be erroneous. The remaining details are largely derived from the part numbers. The list below is not a definitive guide to the various models but rather indicative only of the kinds of switches produced.

Part Contact type Keycaps Angle Force (cN) Tactile Form Contacts Type Source NSN
M81A-0100 Gold-alloy prism 6 mm 70±20 No Open 1A Catalogues; US sample parts
M81A-01R0 Gold-alloy prism 6 mm 70±20 No Open 1A Red LED Catalogues
M81A-01G0 Gold-alloy prism 6 mm 70±20 No Open 1A Green LED Catalogue
M81A-01Y0 Gold-alloy prism 6 mm 70±20 No Open 1A Yellow LED Catalogue
M81A-0200 Gold-alloy prism 12 mm 70±20 No Open 1A Catalogue
M81A-0700 Gold-alloy prism 6 mm 70±20 No Open 1A Catalogue
M81A-1300 Gold-alloy prism 6 mm 105±30 Standard Open 1A Catalogue; US sample parts
M81A-1400 Gold-alloy prism 12 mm 105±30 Standard Open 1A Catalogue
M81A-1GBR 100 mA, 28 V 70±20 cN 105±30 cN Open 1A German custom German custom part data
M81B-0300 Gold-alloy prism 6 mm 85±20 No Open 1B Catalogue
M81B-0400 Gold-alloy prism 12 mm 85±20 No Open 1B Catalogue
M81C-0100 Gold-alloy prism 6 mm 95±35 No Open 2A Catalogue
M81C-0200 Gold-alloy prism 12 mm 95±35 No Open 2A Catalogue
M81C-0700 Gold-alloy prism 6 mm 95±35 No Open 2A Catalogue
M81C-1100 Gold-alloy prism 6 mm 90±35 Standard Open 2A Catalogue
M81C-1400 Gold-alloy prism 12 mm 90±35 Standard Open 2A Catalogue
M81C-1700 Gold-alloy prism 6 mm 90±35 Standard Open 2A Catalogue
M81D-0300 Gold-alloy prism 6 mm 85±35 No Open 1A+1B Catalogue
M81D-0400 Gold-alloy prism 12 mm 85±35 No Open 1A+1B Catalogue
M81D-0GBM 100 mA, 28 V 85±35 cN No Open 1A+1B German custom German custom part data
M81E-0500 Gold-alloy prism 6 mm 70±20 No Covered 1A Catalogues; US sample parts 5930-01-451-4995
M81E-05R0 Gold-alloy prism 6 mm 70±20 No Covered 1A Red LED Catalogues
M81E-0600 Gold-alloy prism 12 mm 70±20 No Covered 1A Catalogue; parts stockist 5930-01-276-4698
M81E-0GDF 100 mA, 28 V 70±20 cN 105±30 cN Covered 1A German custom; with diode German custom part data
M81E-1500 Gold-alloy prism 6 mm 105±30 Yes Covered 1A US sample parts
M81F-0500 Gold-alloy prism 6 mm 95±35 No Covered 2A Catalogue
M81F-0600 Gold-alloy prism 12 mm 95±35 No Covered 2A Catalogue
M81F-1500 Gold-alloy prism 6 mm 90±35 Standard Covered 2A Catalogue
M81F-1600 Gold-alloy prism 12 mm 90±35 Standard Covered 2A Catalogue
M81G-0100 Gold-alloy prism 6 mm 95±35 No Open 1A Space bar Catalogues; US sample parts
M81G-0200 Gold-alloy prism 12 mm 95±35 No Open 1A Space bar Catalogue
M81H-0500 Gold-alloy prism 6 mm 95±35 No Covered 1A Space bar Catalogues
M81H-0600 Gold-alloy prism 12 mm 95±35 No Covered 1A Space bar Catalogue
M82A-0100 Silver-alloy prism 6 mm 70±20 No Open 1A Last-buy notification
M82A-0GDR 100 mA, 60 V 70±20 cN 105±30 cN Open 1A German custom; with diode Last-buy notification; German custom part data
M82A-0GEM 100 mA, 60 V 70±20 cN 105±30 cN Open 1A German custom Last-buy notification; German custom part data
M82A-1100 Silver-alloy prism 6 mm 105±30 Standard Open 1A Last-buy notification
M82A-1GEO 100 mA, 60 V 70±20 cN 105±30 cN Open 1A German custom; no fixing pins Last-buy notification; German custom part data
M82C-0100 Silver-alloy prism 6 mm 95±35 No Open 2A Last-buy notification
M82C-0GBL 100 mA, 60 V 95±35 cN 90±35 cN Open 2A German custom Last-buy notification; German custom part data
M82E-0500 Silver-alloy prism 6 mm 70±20 No Covered 1A Last-buy notification
M82E-0600 Silver-alloy prism 12 mm 70±20 No Covered 1A Last-buy notification
M82E-1500 Silver-alloy prism 6 mm 105±30 Standard Covered 1A Last-buy notification; US sample parts
M82E-1600 Silver-alloy prism 12 mm 105±30 Standard Covered 1A Last-buy notification
M83A-0N00 Gold-plated copper core Hirose 70±15 Yes? Open 1A Hirose datasheet
M83S-0N00 Gold-plated copper core Hirose 70±15 Yes? Open 1A 1.5±0.3 mm travel Hirose datasheet
M84A-0100 Gold-plated wire 6 mm 70±20 No Open 1A Catalogues
M84A-01R0 Gold-plated wire 6 mm 70±20 No Open 1A Red LED Catalogue
M84A-0GCH 10 mA, 60 V 70±30 cN 105±30 cN Open 1A German custom Last-buy notification; German custom part data
M84A-0GEN 10 mA, 60 V 70±30 cN 105±30 cN Open 1A German custom; without fixing pins Last-buy notification; German custom part data
M84C-0GDT 10 mA, 60 V 95±35 cN 90±35 cN Open 2A German custom; with diode Sold surplus on German eBay; German custom part data
M84E-0500 Gold-plated wire 6 mm 70±20 No Covered 1A Catalogues
M84E-05R0 Gold-plated wire 6 mm 70±20 No Covered 1A Red LED Catalogue
M84E-0600 Gold-plated wire 12 mm 70±20 No Covered 1A Last-buy notification
M84E-1500 Gold-plated wire 6 mm 105±30 Standard Covered 1A Last-buy notification
M84E-1600 Gold-plated wire 12 mm 105±30 Standard Covered 1A Last-buy notification
M84F-0500 Gold-plated wire 6 mm 95±35 No Covered 2A Last-buy notification
M84F-1500 Gold-plated wire 6 mm 90±35 Standard Covered 2A Last-buy notification
M84G-0100 Gold-plated wire 6 mm 95±35 No Open 1A Space bar Catalogues
M84H-0500 Gold-plated wire 6 mm 95±35 No Covered 1A Space bar Catalogues

M83S-0N00

This type is used in the Yamaha QX21, listed as M83S-0N00 in the service manual. It is listed as M83S-0N00-001 on the Hirose datasheet, where -001 may denote the technical revision. The M83S type found in the Epson PX-8 is tactile even with the reduced travel. It is Hirose mount with 1.5 mm travel.

M84C-0GDT

This is a German custom type. The version sold on eBay was technical revision 3 (part number M84C-0GDT/03). Although the part number indicates linear switches and the plunger operating surfaces are of the linear type, the switch does apparently offer some tactility.

The pictures below are from UncleFan:

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View full-size image
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Note that the gold-plated wire contact points are attached directly to flat stationary contact posts, instead of on the usual raised area.

MD

Part Type Source Notes
MD4A-1100 3 mm travel, Hirose mount Hirose datasheet

MJ

Part Type Source Notes
MJ4A-1100 4 mm travel, Hirose mount Hirose datasheet