Multicomp Pro Thermal Switch NC 170°C
Normally closed thermal switch, 170°C, 16A, for HVAC and industrial use.
The Multicomp Pro MP-33-170/140/E111B14H221 is a high-precision snap-action thermostat switch designed to regulate system temperatures by sensing changes at 170°C and activating or deactivating heating or cooling systems accordingly. This normally closed (N/C) switch ensures reliable performance in a wide range of applications, from HVAC systems to industrial process control.
With a contact rating of 16A at 250VAC, this thermostat switch handles significant electrical loads, making it suitable for demanding environments. The switch features an automatic reset function, ensuring continuous operation without manual intervention. Its robust construction includes a bimetal disc, alloy copper movable arm, and brass nickel-plated terminals, all housed in a durable PF case with an aluminium cap.
Key Features
- Normally closed (N/C) contact operation
- 170°C ±5°C switching temperature
- 140°C ±10°C reset temperature
- Low resistance between terminals (max 50mΩ at DC5V/0.25A)
- High insulation resistance (min 100MΩ at DC500V)
- Dielectric strength of 1500VAC for 1 minute
- Certified to GB14536.1, GB14536.10, GB/T22687, EN60730-1, and EN60730-2-9 standards
This thermostat switch is ideal for temperature control in appliances, HVAC systems, and industrial automation. Its compact design (33mm x 22mm x 2mm) and flange mounting make it easy to integrate into existing systems. The product includes one thermostat switch, ready for installation.
- Temperature controllers
- Industrial automation
- Process control systems
- HVAC systems
- Switching Temperature: 170°C ±5°C
- Reset Temperature: 140°C ±10°C
- Contact Operation: Normally Closed (N/C)
- Contact Rating: 16A at 250VAC
- Resistance between terminals: max 50mΩ at DC5V/0.25A
- Insulation resistance: min 100MΩ at DC500V between terminals and cap
- Dielectric strength: 1500VAC for 1 minute between terminals and cap
- Maximum ambient temperature: 170°C
- Material: AgNi/Cu (T2) contacts, brass stationary arm, PF case/top cover, aluminium cap
- Bimetal disc, alloy copper movable arm, copper rivets, brass (nickel plated) terminals
- Sensor Terminals: Quick Connect
- Sensor Housing: Flange Mount
- Dimensions: 33mm x 22mm x 2mm
- Weight: 7g
- Certifications: GB14536.1-2008, GB14536.10-2008, GB/T22687-2008, EN60730-1, EN60730-2-9
- Product Range: MP Auto-Reset Thermostats N/C
- SVHC: No SVHC (25-Jun-2025)
Always follow local regulations and product guidance.
Free standard delivery on UK mainland orders. Express delivery options and international shipping available at checkout.
We offer a 30-day money-back guarantee on most products. For faulty items, contact us within 14 days for a replacement or refund.
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