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Clarostat (Honeywell Sensing and Productivity Solutions) 1HS3
- Part No.:
- 1HS3
- Manufacturer:
- Clarostat (Honeywell Sensing and Productivity Solutions)
- Category:
- Pushbutton Switches - Hall Effect
- Package:
- Description:
- 1HS3 - Honeywell Hermetically Sealed Basic MicroswitchThe 1HS3 is a premium, high-reliability Hermetically Sealed Microswitch from Honeywell’s HS Series. Engineered for the most demanding environments, it features a true metal-to-metal, glass-to-metal her…
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Product Details
1HS3 - Honeywell Hermetically Sealed Basic Microswitch
The 1HS3 is a premium, high-reliability Hermetically Sealed Microswitch from Honeywell's HS Series. Engineered for the most demanding environments, it features a true metal-to-metal, glass-to-metal hermetic seal that protects the switching mechanism from moisture, dust, and atmospheric changes. Whether in the unpressurized bay of an aircraft or deep within industrial machinery, the 1HS3 ensures precision performance where standard switches fail.
Design Integrity: Built to meet MIL-PRF-8805 requirements, this switch is designed for applications where failure-free operation is mandatory under extreme environmental stress.
Overview & Environmental Excellence
The 1HS3 belongs to Honeywell's elite family of MICRO SWITCH™ products. The hallmark of the 1HS3 is its Hermetic Sealing, which involves an inert gas filling within the metal housing to prevent contact oxidation and maintain consistent operating characteristics regardless of altitude or ambient pressure.
This switch utilizes a SPDT (Single Pole Double Throw) contact arrangement and is characterized by its compact size and high vibration resistance. The 1HS3 is often the first choice for engineers designing aerospace landing gear, fuel valves, and external flight control surfaces where exposure to hydraulic fluids and de-icing agents is common.
About Honeywell Sensing & IoT
Honeywell is a global leader in sensing and switching technology. Their MICRO SWITCH™ brand invented the very first microswitch in 1932 and has remained the industry standard for precision and durability ever since.
Honeywell's aerospace and defense division specializes in "Severe Environment" components. Their HS series switches are qualified to numerous military specifications and are found in almost every major commercial and military aircraft platform worldwide.
Key Advantages
Metal-to-glass seals protect contacts from all external contaminants and atmospheric pressure shifts.
Maintains precise operation in temperatures ranging from -54°C to +121°C [-65°F to +250°F].
Engineered to withstand the intense mechanical stress of aerospace takeoff and industrial vibration.
Delivers heavy-duty environmental protection in a lightweight, space-saving package.
Package & Mechanical Specs
The 1HS3 is housed in a rugged, corrosion-resistant stainless steel case. It is designed for easy integration into custom brackets or standard aerospace mounting holes.
- Housing Material: Stainless Steel.
- Terminal Type: Solder Terminals (optimized for high-reliability wiring).
- Actuation: Pin Plunger (compatible with various external levers).
- Sealing Standard: MIL-PRF-8805, Design 3.
Contact Configuration
The 1HS3 follows a standard SPDT logic for versatile control circuit integration.
Technical Specifications
| Part Number | 1HS3 |
|---|---|
| Manufacturer | Honeywell |
| Switch Type | Hermetically Sealed Microswitch |
| Circuitry | SPDT (Single Pole Double Throw) |
| Current Rating | 1.0 A to 25 A (Depending on Voltage/Load Type) |
| Operating Force | 10 oz to 22 oz [2,78 N to 6,12 N] |
| Temperature Range | -54°C to +121°C |
| Approvals | MIL-PRF-8805 / QPL Listed |
Equivalent & Replacement Guide
The 1HS3 is a specialized component. When seeking equivalents, the hermetic rating and mounting dimensions are critical.
- 1HS1 / 1HS6: Other variations within the Honeywell HS family with different actuation forces or terminal styles.
- M8805/1-023: The Military Standard (Mil-Spec) equivalent often used in government procurement.
- Safran/OTTO Alternatives: Functional equivalents exist in the OTTO P1 or P3 series, though mounting patterns must be verified.
Primary Applications
Aerospace Landing Gear
Position sensing for landing gear doors and lock mechanisms exposed to high-velocity air and debris.
Fuel & Hydraulic Valves
Limit switching in valve actuators where exposure to volatile fluids requires total hermetic isolation.
Defense & Ordnance
Critical trigger and safety interlocks in missile systems and ground combat vehicles.
Offshore & Marine
Control systems on oil rigs or subsea equipment where salt spray and high pressure are constant factors.
Quality & Authenticity
- QPL Listed: Fully qualified to MIL-PRF-8805 standards for military-grade switches.
- 100% Hermetic Testing: Every 1HS3 unit is leak-tested to ensure the integrity of the inert gas chamber.
- Authorized Sourcing: We provide full traceability and Certificates of Conformance (CoC) for all Honeywell aerospace components.
Technical FAQ
What makes the 1HS3 different from a standard "sealed" switch?
Can the 1HS3 handle high-altitude operation?
Disclaimer
1HS3 Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Clarostat (Honeywell Sensing and Productivity Solutions)
- Series:
- Micro Switch
- Packaging:
- Product Status:
- Circuit:
- Switch
- Switch Function:
- Supply Voltage:
- Supply Current:
- Voltage - Output (Max):
- Current - Output (Max):
- 28 VDC
- Actuator Type:
- 25 A
- Actuator Color:
- Ingress Protection:
- Termination Style:
- Mounting Type:
- Operating Temperature:
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- 1HS3 Clarostat (Honeywell Sensing and Productivity Solutions) 1HS3 - Honeywell Hermetically Sealed Basic MicroswitchThe 1HS3 is a premium, high-reliability Hermetically Sealed Microswitch from Honeywell’s HS Series. Engineered for the most demanding environments, it features a true metal-to-metal, glass-to-metal her…
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