Factory Supply Multi-Contact Design Pressure-Type Mechanical Thermostat for Refrigerators/Freezers

• Customization: Available
• Customized: Customized
• Certification: RoHS, CE
• Model NO.: FT-1302
• Rated Voltage: 250V~ 50/60Hz
• Main Contacts (Kp/Kd/Ks): 6 (6) a (Resistive Load)
• Auxiliary Contacts (Kx): 6 (6) a / 0.1A (Signal Circuit)
• Temperature Control Range: -25°C ~ +10°C
• Temperature Switching Difference: 2~4°C
• Temperature Control Accuracy: ±1°C
• Capillary Tube Length: Commonly 2.5m
• Sensing Bulb Material: Stainless Steel
• Capillary Tube Material: Tin-Plated Copper
• Main Body Material: Galvanized Steel Plate + Engineering Plastic
• Transport Package: Carton Packaging
• Specification: KP/KD/KS/KX Serie
• Trademark: Thermal International
• Origin: China
• HS Code: 9032100000
• Production Capacity: 80, 000PCS/Month
• Package Size: 45.00cm * 50.00cm * 50.00cm
• Package Gross Weight: 18.000kg

Product Description

Product Description

Factory Supply Multi-contact Design Pressure-type Mechanical Thermostat for Refrigerators/Freezers

This is a KP/KD/KS/KX series pressure-type mechanical thermostat, a core temperature control component in refrigeration equipment such as refrigerators and freezers. It controls the compressor's start and stop through a purely mechanical structure.

Working Principle:

Its core principle utilizes the physical mechanism of liquid thermal expansion and contraction and pressure-driven contact switches:
I. Temperature Sensing: The temperature-sensing bulb (the probe at the end of the capillary tube) is fixed near the refrigerator evaporator and filled with a volatile temperature-sensing liquid (such as isobutane).

II. Pressure Conversion: When the temperature inside the refrigerator rises, the liquid in the temperature-sensing bulb evaporates, increasing the pressure; when the temperature drops, the gas condenses into liquid, decreasing the pressure.

III. Switching Action: Pressure changes are transmitted through a thin capillary tube to the bellows inside the thermostat, pushing the mechanical structure to control the opening and closing of the main contacts, thereby starting and stopping the compressor.

IV. Manual Adjustment: The adjustment shaft on top can change the preload of the internal spring, thus setting different temperature control levels.

Specification

Product Name	(KP/KD/KS/KX Serie) Pressure-type Mechanical Thermostat
Electrical Parameters	Rated Voltage	250V~ 50/60Hz
	Main Contacts (KP/KD/KS)	6 (6) A (resistive load)
	Auxiliary Contacts (KX)	6 (6) A / 0.1A (signal circuit)
Temperature Control Parameters	Temperature Control Range	-25°C ~ +10°C (suitable for both refrigeration and freezing)
	Temperature Switching Difference	2~4°C (fine-tunable)
	Temperature Control Accuracy	±1°C
Physical Parameters	Capillary Length	Commonly 2.5m (long coil design shown in the image)
	Sensing Bulb Material	Stainless Steel
	Capillary Material	Tin-plated Copper
	Main Body Material	Galvanized Steel Plate + Engineering Plastics
Certification Standards	Complies with EN 60730-2-9 safety standard.
	Suitable for environmentally friendly refrigerants such as R600a.

Product Features & Main Application Scenarios: 

Features:

1) Purely Mechanical Structure: Requires no external power supply, operates based on physical principles, ensuring high reliability and strong resistance to electromagnetic interference.

2) Multi-Contact Design: Includes main and auxiliary contact points, allowing simultaneous control of the compressor and lighting or defrosting heater.

3) Flexible Installation: The capillary tube can be freely bent to adapt to different refrigerator internal layouts.

4) Safe and Reliable: Built-in overload protection and leak-proof design, meeting international safety standards.

5) Low Cost: Mature technology, high cost-performance ratio, making it the first choice for household refrigeration equipment.

Application:

1) Household Equipment: Double-door/Three-door refrigerators, upright/horizontal freezers.

2) Commercial Equipment: Small beverage display cases, ice makers, ice cream machines.

3) Special Equipment: Laboratory low-temperature storage boxes, medical cold storage boxes.

Product Pictures

Packing & Delivery

Workshop Pictures

Certifications

FAQ

FAQ

Q1 Are you trader? 
A1 We are factory.
 
Q2 What's your lead time for 5000pcs?
A2 We need around 20days after down payment received. .
 
Q3 You payment term?
A3 We accept LC, T/T 20% remittance +80% before delivery, DP.
 
Q4 Can we print our LOGO on heating element?
A4 Yes.
 
Q5 Do you offer guarantee? 
A5 Yes. We offer 1 year guarantee.