20HM1-1 Honeywell Hermetic Sealed Basic Micro Switches

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Product Details:

Product	Description
Brand	Honeywell
Model Number	20HM1-1
Description	hermetic sealed miniature snap-action switch
Housing material	300 series stainless steel
Mechanical endurance	25,000 operations min.
Electrical endurance	25,000 operations min.
Dielectric voltage (initial)	1000 Vrms for 1 minute
Circuitry	SPDT
Contact material	silver, gold, gold bifurcated
Electrical rating	up to 4 A at 28 Vdc (ref. electrical rating table)
Sealing	symbol 5, hermetic sealed to MIL-PRF-8805
Temperature range	-65 °C to 121 °C [-85 °F to 250 °F] (see catalog listing table)
Temperature range (optional)	-184 °C to 260 °C [-300 °F to 500 °F] (see catalog listing table)

Above specifications mentioned are for quick reference only. Actual technical details has to be obtained from below catalog.

Description

20HM1-1 Honeywell Hermetic Sealed Basic Micro Switches

Honeywell HM hermetic sealed miniature basic switches are designed for a variety of commercial and military aircraft
as well as equipment for deep space applications (high altitude requirements). These miniature hermetic sealed
switches can be found in a variety of other applications including military land vehicles, marine environments, and
other harsh industrial environments. The switches are available as a MIL-PRF-8805 qualified switch. Select HM
switches are available with UL 508 certification for industrial or surface transportation applications. The MICRO
SWITCH™ HM hermetic sealed switch design incorporates the glass-to-metal and metal-to-metal sealing with more
than 50 years of use in multiple applications.
The hermetically sealed HM basic switches are ideal where a symbol 5 seal is required for stringent applications
including a wide range of temperatures from -184 °C to 260 °C [-300 °F to 500 °F]. Designed with a stainless steel
housing and hermetic seal construction, the HM switches are suitable for applications where dust, water, other
particulate contaminants, and corrosive gases are present.
The HM basic switch provides versatility with bifurcated gold contacts for controlling low energy loads (mA and mV)
reliably or silver contacts for switching power duty loads at 30 vdc or 115 Vac, 400 Hz. Electrical connectivity to the
switch is achieved with individual wire leads or “through hole” solder posts adding to the versatility of the HM switch.