The controller of HVAC systems in residential, commercial and industrial settings, thermostats have transformed from analog or mechanical to digital and now smart types. While smart units are popular thanks to the automation trend, older technologies remain available.
In China, both analog and digital components and stand-alone finished products can be sourced in standard and buyer-specified configurations, with manufacturers ensuring all meeting UL, CE and RoHS standards. These are usually made using temperature sensors, passive components, PCBs and metal sheets from domestic companies.
Widely available mechanical thermostats are mainly for household appliances and are rated at 220VAC, 50/60Hz. These have an action temperature of 0 to 300 C and an accuracy level of ±1, ±3 or ±5 C.
Digital variants, which form the bulk of shipments of Chinese suppliers, are widely used in the manufacturing sector, including processing and instruments. These thermostats are usually rated at 95 to 240VAC, 50/60Hz and have 5 to 75 C action temperature and ±1 C accuracy.
Smart stand-alone types typically work with virtual assistants, have onboard storage and support functions such as remote control, low- and high-temperature protection, and child lock. They enable energy saving through temperature calibration and other intelligent features. This subcategory will continue to gain traction, driven by fast developments in the smart home and building market. According to QY Research, its global reach amounted to $4.27 billion in 2023 and would hit $8.93 billion by 2031 at a CAGR of 10.2 percent.
Bimetal thermostat, 0 to 160 C
Company: Taizhou Mingjia Electric Appliance Co. Ltd
Taizhou Mingjia’s bimetal thermostat, the KSD302-214DH, has an action temperature range of 0 to 160 C and temperature accuracy of ±3, ±5 or ±10 C. It is rated at 250 or 400VAC, 50/60Hz, 15 to 60A and has contact resistance of ≤50mohms, insulation resistance of ≥100Mohms and operating life span of ≥100,000 cycles. This device meets UL, cUL, CE and CQC standards.
MOQ: 100 units
Lead time: 30 days
Bimetal thermostat, 0 to 300 C
Company: Taizhou Mingjia Electric Appliance Co. Ltd
A bimetal thermostat, the KSD303-222ZJ1 from Taizhou Mingjia has an action temperature range of 0 to 300 C and temperature accuracy of ±2, ±3, ±5 or ±10 C. This 210 or 380VAC, 50/60Hz, 5 to 16A component has ≤50mohm and ≥100Mohm contact and insulation resistance and can withstand ≥100,000 cycles. It complies with UL and cUL requirements.
MOQ: 100 units
Lead time: 30 days
Smart thermostat for electric UFHs
Company: Xiamen Hysen Control Technology Co. Ltd
Xiamen Hysen offers the HY516 WIFI-2895, a smart stand-alone thermostat suitable for electric underfloor heating systems with 90 to 240V, 50/60Hz rating. This device, with a rated voltage of 110, 120, 220 or 230V, is compatible with Tuya Smart and Smart Life apps. It is made of flame-retardant PC and ABS.
MOQ: 10 units
Lead time: 5 days
Smart thermostat for UFH and boiler systems
Company: Xiamen Hysen Control Technology Co. Ltd
The HY518-G1-9982 from Xiamen Hysen is a smart stand-alone thermostat with a voltage rating of 110, 120, 220 or 230V. It is designed for electric underfloor heating, water heating and water or gas boiler systems. It works with Amazon Alexa, Google Assistant and other voice-activated AI assistants.
MOQ: 1 box
Lead time: 5 days
Analog thermostat, 42 to 250 C
Company: Zhongshan Kingrong Electronics Co. Ltd
The KSD9700-G150C analog or mechanical thermostat from Zhongshan Kingrong has an operating range of 42 to 250 C and tolerance of ±3 or ±5 C. It has ≤50mohm contact resistance, 1,500VAC/min electrical strength without breakdown flashover and ≥10,000-cycle operating life span.
MOQ: 500 units
Lead time: 25 days
Analog thermostat, 16A on resistive loads
Company: Zhongshan Kingrong Electronics Co. Ltd
Zhongshan Kingrong’s model KSD301-16A-105NC is an analog or mechanical thermostat with a rated current of 16A on resistive load, rated voltage of 250V and maximum operating temperature of 105 C. It can withstand 100,000 cycles on resistive loads. This component meets UL and CQC requirements.
MOQ: 500 units
Lead time: 25 days
