

1. Product overview
PTC coolant heater is an electric heater that heats antifreeze with electricity as energy source and provides heat source for passenger cars.
The heating device uses PTC semiconductor (positive temperature coefficient thermistor), and the shell is made of aluminum alloy precision casting, with Excellent anti-dry, anti-interference, anti-collision, explosion-proof performance, safe and reliable, trustworthy.
2. Product application
This product is a liquid heater, specially designed for pure electric buses. PTC coolant heaters rely on on-board power to provide heat for pure electric buses. The rated voltage of the product is 600V and the power is 20KW, which can be adapted to various pure electric bus models. The heating power is strong, providing sufficient and sufficient heat, providing a comfortable driving environment for drivers and passengers, and can also be used as a heat source for battery heating.
This product can be used alone to replace traditional oil-fired liquid heaters to achieve complete energy saving, emission reduction and cost reduction. In extremely cold areas, considering the lack of electricity, it can assist the use of traditional oil-fired liquid heaters. The use method is to connect the pure electric heater and the oil-fired heater in series, and confirm whether it is necessary to increase the water pump according to the actual demand to improve the circulation efficiency.
Rated Power | 7KW,Tmed=60ºC; 10L/min |
Rated voltage(V) | 410V |
Supply voltage (V) | 250-490V |
Electrical strength | 2800V DC 1min, no discharge breakdown |
Insulation resistance | 1000VDC ≥100MΩ (23ºC±5ºC,90% HR) |
Weight (kg) | 8kg |
Storage temperature | -40ºC~125ºC |
Coolant temperature | -40~90ºC |

1. Provide sufficient heat source, the power can be adjusted, and solve the three major problems of defrosting, heating and battery insulation at the same time.
2. Low operating cost: no oil burning, no high fuel costs; maintenance-free products, no need to replace parts damaged by high temperature combustion every year; clean and no stains, no need to clean up oil stains frequently.
3. Pure electric buses no longer need fuel for heating and are more environmentally friendly.




Our factory's production units are equipped with high tech machineries, strict quality,control testing devices and a team of professional technicians and engineers endorsing the quality and authenticity of our products.
Currently being the largest stakeholders in China, we hold a domestic market share of 40% and then we export them around the globe particularly in Asia, Europe and Americas.
