Precautions for relay purchase

When buying relays, everyone will be confused. What kind of relays should we choose?

First of all, you should consider what kind of relay is the first one. There are many kinds of relays, mainly including electromagnetic relay, solid-state relay, temperature relay, reed relay, time relay and high-frequency relay. Therefore, we need to first determine what kind of relay we want to choose.

 

Electromagnetic relay is a kind of electronic control device, which has control system (also known as input circuit) and controlled system (also known as output circuit). It is usually used in automatic control circuit. In fact, it is an "automatic switch" which uses smaller current and lower voltage to control larger current and higher voltage. Therefore, it plays the role of automatic regulation, safety protection and conversion circuit in the circuit.

 

Solid state relay (SSR) is a contactless switch composed of micro electronic circuit, discrete electronic device and power electronic device. The isolation between the control end and the load end is realized by using the isolation device. The input of the solid-state relay uses tiny control signals to directly drive the high current load.

 

Temperature relay is a kind of relay that acts when the external temperature reaches a given value. The product is a through contact inductive sealed temperature relay, which has the characteristics of small volume, light weight, high temperature control accuracy, and strong universality. It is the most widely used product, which can be used for temperature control and overheat protection in aerospace, surveillance camera equipment, motor, electrical equipment and other industries.

 

The reed relay is a kind of relay which uses the action of the reed sealed in the tube to open, close or change the circuit.

 

Time relay refers to a kind of relay whose output circuit needs to pass the specified accurate time to produce jumping change (or contact action) after adding (or removing) the input action signal. It is a kind of electrical component used in the circuit with low voltage or low current to connect or cut off the circuit with high voltage and high current.

 

The high frequency relay is used to switch the high frequency circuit. The high frequency signal relay whose switching frequency is below 100MHz is called high frequency relay. The low profile component, which is composed of ceramic base, fully matches the thermal expansion coefficient between the dry spring switch and the pin, and can reduce any thermal stress generated in the package. The switching life can reach billions of times.

 

After understanding the functions of various relays, we will know what type of relay to choose.

 

Secondly, according to the selection of use environment, what kind of relay specification size should be, and whether it can meet the use requirements. Some use environments require the relay to be dust-proof and waterproof, some do not have sealing requirements, and some use environments require the relay to be corrosion-resistant.

 

The installation space of the relay also has a limited size. The relay has large relay, small relay, micro relay and ultra micro relay. According to the size of the installation space, the use environment requirements, whether the specifications meet the requirements, and whether the service life can meet the requirements, the relay can be reasonably selected.

 

Finally, there are many relay manufacturers of the same type in the market. We don't know which relay has good quality. At this time, we need to see whether the relay manufacturer is a professional relay manufacturer. For example, Donghai Tongling Electrical Co., Ltd. is a professional relay manufacturer, whose products are often exported to foreign countries. After years of relay sales, we have won many repeat customers, The rate of praise is high. When buying the relay, the customer's most hope is to find the relay manufacturer to buy directly. Because the price is cheap and the quality is guaranteed, the manufacturer is directly responsible for the problem and will not shirk the responsibility. There are many middlemen who pretend to be manufacturers and boast about their services. Once problems arise, they shirk their responsibilities and cause unnecessary troubles. So when choosing the relay brand, we must see whether the relay production is professional.

 

The relay type is selected, the relay specification is selected, and the following is the cargo comparison!

 

First: specific mass

 

Before deciding which relay manufacturer to choose, we should first consider the quality. At this time, we can choose several manufacturers for comparison. Donghai Tongling Electrical Co., Ltd. can provide samples for customers to test for free. After years of brand precipitation, our extraordinary quality has been created, and the quality can stand the test of customers.

 

Second: price comparison

 

When the quality is satisfactory, it depends on the price. Different manufacturers have different positions for themselves. Some of them have high prices, but the quality is almost the same. Our Donghai Tongling Electric Appliance Co., Ltd. takes customers as the center, on the basis of constantly improving product quality, to give customers the best price, which is also the best way to express gratitude to our customers and friends who choose us and support us.

 

Third: after sales comparison

 

Stop in the relay industry for more than ten years, without a good after-sales service system, it is impossible to walk steadily to the present. We adhere to the concept of customer first, deal with the problems of customers in a timely manner, and only want to make customers purchase comfortable, and rest assured after-sales!

 

How much do you know about the precautions for relay purchase? If you have any questions, you can contact us directly, hoping to help you purchase and select relays.