Honeywell 11HM1 Hermetically Sealed Switch
The Honeywell 11HM1 hermetically sealed switch is part of the MICRO SWITCH HM Series, a family designed for demanding environments where dust, water, particulate contamination, and corrosive gases can threaten standard switch performance. Public product data describes the Honeywell 11HM1 as an SPDT hermetically sealed basic switch rated at 3 A at 28 Vdc. Additional published specifications connect it with silver contacts and an operating range extending from approximately -65 °C to 121 °C, depending on the listing and application standard.
Why the Honeywell 11HM1 Is Different
The Honeywell 11HM1 hermetic sealed basic switch is not simply enclosed. It is built around a gas-tight chamber that transmits motion through a metal diaphragm while protecting the internal contact area from outside contaminants. That construction is one of the main reasons HM Series switches are used where long-term reliability matters in adverse environments, including aerospace, marine, industrial, and specialty equipment applications.
Technical Characteristics of Honeywell 11HM1
Public distributor and datasheet sources identify the Honeywell 11HM1 sealed switch as an SPDT miniature switch with a 3 A current rating at 28 Vdc. Honeywell’s HM Series information adds that these switches use stainless steel housing and hermetic sealing, and that the broader series supports very demanding applications where a symbol 5 seal may be required. Honeywell also notes that HM switches are available in versions qualified to MIL-PRF-8805, while select catalog listings carry UL 508 certification.
Where Honeywell 11HM1 Is Commonly Used
Searches for Honeywell 11HM1 hermetically sealed switch, SPDT sealed basic switch, 3A 28VDC microswitch, and HM Series sealed switch often come from industries where contamination control and switching stability matter. These switches are relevant in aerospace assemblies, transport equipment, marine systems, oil-related installations, refrigeration systems, and harsh industrial machinery where open switches are not the best choice.
What to Confirm Before Replacement
Before selecting the 11HM1 hermetic sealed switch, it is wise to confirm the actuator format, terminal type, mounting method, electrical load, and the application standard tied to the original part. Exact code matching is especially important when the switch is part of a controlled or qualified system.
FAQ
What type of switch is Honeywell 11HM1?
It is a Honeywell HM Series hermetically sealed basic switch with SPDT circuitry.
What rating is associated with 11HM1?
Public technical sources identify it as a 3 A at 28 Vdc switch.
Why is Honeywell 11HM1 called hermetically sealed?
Because the contacts are enclosed in a gas-tight chamber designed to keep out contaminants such as dust, moisture, and corrosive gases.
Where is 11HM1 commonly used?
It is relevant in aerospace, marine, industrial, transport, and other harsh-environment applications where switch protection is critical.
Does 11HM1 belong to the HM Series?
Yes. It is part of Honeywell’s MICRO SWITCH HM Series of hermetically sealed basic switches.
What should be checked before ordering Honeywell 11HM1?
Check the actuator style, terminal format, mounting method, electrical requirements, and any qualification or certification requirements tied to the installation.
For more information about Honeywell, HM Series switches, and related sealed-switch solutions, this reference may help.