=====Marquardt Series 6180=====

<WRAP wfix right>

|  **Marquardt Series 6180**  ||
| {{ :switch:6180black.jpg?320&detail|The more common Marquardt Series 6180 Black}} \\ {{ :switch:6180brown.jpg?320&detail|The earlier Marquardt Series 6180 Brown}}||
| **Manufacturer** | Marquardt |
| **Part Number** | 6180 |
| **Switch Type** | [[:terminology:linear_switch|Linear]] |
| **Travel** | 4mm |
| **Sense method** | Metal contact |
| **Mount** | Plate mount | 
| **Keycap mount** | Cherry MX-compatible |
| **Rated lifetime** | Unknown | 
| **Quoted operating force** | Unknown |
</WRAP>
**Marquardt Series 6180** is a DIN-compliant linear switch series manufactured by Marquardt. It consists of two variants. It is deeply related to [[switch:cherry_mx_olympia_clear | Cherry MX Olympia Clear]] which appears to have been a custom order switch for Marquardt that is interchangeable with Series 6180.

==== General Characteristics ====

Both switches in the series share the same general design, two-stage spring, bottom housing, including integrated diode, and contact module. They also share a similar method of action - i.e. that the stem makes contact with a separate part, which then puts pressure on the contact module. Housings are two-way incompatible between the switches in the series due to the actuator part sitting differently in the housing in each switch.

==== Series 6180 Brown ====
This is the earlier version of the switch, found in an Olympia Carrera dated 1986. It has a dark brown top housing, and a slightly mint green stem. The stem is MX mount, and slides past a semi-free-floating contoured plastic rocker (it merely rests in a recess in the top housing) with a peg on the other side. This peg is what puts pressure on the contact module, closing the circuit. The switch weighting is in the ballpark of [[switch:cherry_mx_black|MX Black]], and has 4mm travel. When fully depressed, the stem is completely inside the housing.

==== Series 6180 Black ====
This later version of the switch, found in a 1988-dated Carrera, has a completely black top housing and white stem. The stem remains MX mount, but is slightly taller than the brown variant and has a notch. Instead of a plastic rocker, it slides past a uniquely shaped leaf spring, which rests in a slit in the top housing. It has a prong which puts the pressure on the contact module. This switch is significantly heavier ((through unscientific measurement, somewhere in the range of 10-20gf heavier - possibly a combination of a stiffer return spring and weight from the leaf spring)). It still has 4mm travel, but the stem is slightly outside of the housing at bottom out. 

==== Gallery ====
<gallery>
:switch:20211102_130251.jpg
:switch:20211105_203639-2.jpg
:switch:breakdown.jpg
</gallery>

{{tag> switch:oem-marquardt switch:type-linear switch:sense-contact}}