Kailh

Kailh Purple Iris

A low-profile linear key switch featuring a short 0.8±0.30mm actuation point and a quiet structure.

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A low-profile linear key switch featuring a short 0.8±0.30mm actuation point and a quiet structure.

Product Overview

Kailh Purple Iris (CPG1353S01D01-21) is a quiet linear low-profile key switch with an actuation force of 30±10gf, an actuation point of 0.8±0.30mm, and a total travel of 1.8mm +0.4/-0mm. It has rubber dampers that soften impacts in both the downward and upward directions, and its sound on pressing is up to 25dB in the manufacturer's specified test. It has a durability test value of 5,000 × ten thousand cycles and is designed for the dedicated mounting requirements of the PG1353 series.

Features

  • Fast response design with a 0.8mm actuation point

    With an actuation point of 0.8±0.30mm and a total travel of 1.8mm +0.40mm, this linear input design reaches the contact point quickly with a short travel distance.

  • Key switch with quiet rubber dampers

    2 rubber dampers soften impacts in both the downward and upward directions. Sound on pressing is up to 25dB.

  • Kailh LowProfile compatible

    A Kailh LowProfile compatible product. When purchasing, please check that the socket and keycaps are compatible.

Configuration

Installed Parts

  • Key switch
    Kailh Purple Iris

Key switch Specifications

Kailh Purple Iris

A quiet linear low-profile switch with rubber dampers and an actuation force of 30±10gf.

Actuation Force
30±10gf
Actuation Point
0.8±0.30mm
Total Travel
1.8mm +0.4/-0mm

Reviews and Overall Assessment

Overall Assessment

In terms of specifications, this is a quiet linear input switch with an actuation force of 30±10gf, an actuation point of 0.8±0.30mm, and a total travel of 1.8mm +0.40mm. It has rubber dampers that soften impacts in both the downward and upward directions, and its sound on pressing is up to 25dB in the manufacturer's specified test.

It is compatible with Kailh LowProfile. Before purchasing, check the stem shape of the socket and keycaps. It has a standard cross-shaped stem and is not compatible with the pig-nose stem of Kailh Choc v1.

Quiet operation, light and smooth input, and quick response are appreciated. However, the soft bottom-out feel caused by the quiet structure lacks a firm rebound, making it a matter of personal preference.
For those who want a bottom-out feel, the same manufacturer's Saker mini is recommended. It has equivalent travel and is a key switch that prioritizes bottom-out feel over quiet operation.

Purple Iris is a suitable option for those who prioritize quiet operation and want a short actuation point and light input.

Manual and Settings

Purple Iris Official Datasheet

This official manufacturer document provides the electrical characteristics, input specifications, outline drawing, and PCB and board-side LED placement requirements for CPG1353S01D01-21.

View the official datasheet

Detailed Specifications

Product Specifications
Basic Information
Product Name / Model Number Kailh Purple Iris / CPG1353S01D01-21
Product Type Quiet linear low-profile key switch
switch Type Mechanical contact SPST
Top Cover / Stem PC/POM
Rating 12V AC/DC or less・10mA AC/DC or less
Operating Temperature -40 to 70℃
Operation and Input
Actuation Force 30±10gf
Return Force 10gf or more
Actuation Point 0.8±0.30mm
Total Travel 1.8mm +0.4/-0mm
Quiet Structure 2 rubber dampers
Durability 5,000 × ten thousand cycles
Sound on Pressing Up to 25dB
Connection and Compatibility
Connection Type 2 terminals/SPST
Compatible Devices Kailh LowProfile compatible devices
Keycap Stem Cross-shaped stem with a circular guard
Size
Size 15.0×15.0×14.5mm