Insulated terminal is an electronic component used to connect wires, achieve electrical insulation and fixation. Correct selection of insulated terminals requires consideration of the following aspects:

1. Determine application requirements

Electrical parameters :

Rated voltage : It is necessary to ensure that the rated voltage of the insulated terminal is higher than the operating voltage in the circuit to prevent electrical breakdown. For example, in a 220V AC circuit, insulated terminals with a rated voltage of 300V or higher should be selected.

Current Rating : Select the appropriate insulated terminal based on the expected current in the circuit. If the current exceeds the rated current of the insulated terminal, it may cause overheating, damage or even a fire. For example, for a circuit carrying 10A , choose an insulated terminal with a current rating of 15A or higher.

Environmental conditions :

Temperature : Consider the temperature range of the environment where the insulated terminal is located. If the ambient temperature is high, you should choose high-temperature-resistant insulated terminals; if the ambient temperature is low, make sure the insulated terminals can still maintain good performance at low temperatures. For example, in high-temperature environments (such as those close to the engine), silicone rubber insulated terminals can be selected, which have better high-temperature resistance.

Humidity : If the application environment has high humidity, you need to choose insulated terminals with good moisture-proof performance. For example, in wet basements or outdoor environments, choose insulated terminals with a waterproof seal.

Chemical Corrosion : If insulated terminals are likely to come into contact with chemicals, corrosion-resistant materials should be selected. For example, in the chemical industry, polytetrafluoroethylene ( PTFE ) insulated terminals can be selected, which have strong corrosion resistance.

2. Choose the appropriate type

Crimp type insulated terminal :

Features : The wires and terminals are tightly connected using a special crimping tool, with reliable connection and low contact resistance. Suitable for various wire specifications and relatively simple to operate.

Application scenarios : Widely used in electronic equipment, electrical control cabinets and other fields. For example, in home circuit wiring, crimp-type insulated terminals can be used to connect wire joints to ensure the safety and reliability of the circuit.

Welding type insulated terminal :

Features : The wires and terminals are connected by welding, with high connection strength and good stability. However, it requires certain welding technology and equipment, and the operation is relatively complicated.

Application scenarios : Suitable for occasions that require high connection reliability, such as aerospace, military and other fields. For example, in satellite circuits, solder-type insulated terminals ensure stable connections in the harsh space environment.

Bolt type insulated terminal :

Features : The wires are fixed to the terminals through bolts, which can withstand large pulling forces and are suitable for high current and high voltage application scenarios. However, the installation is relatively complicated and requires a large installation space.

Application scenarios : Commonly used in power transmission and distribution systems, industrial automation and other fields. For example, in the wiring of large motors, bolt-type insulated terminals can ensure a strong connection and withstand the high current surge when the motor starts.

3. Consider quality and reliability

Material quality :

Shell material : The shell of insulated terminals is usually made of plastic material. Materials with good insulation properties, high temperature resistance, and corrosion resistance should be selected. For example, nylon ( PA ), polycarbonate ( PC ) and other materials are commonly used insulating terminal shell materials.

Conductive material : The conductive part is generally made of copper or copper alloy. Materials with good conductivity and corrosion resistance should be selected. For example, tinned copper terminals have good electrical conductivity and corrosion resistance.

Brands and Certifications :

Choose well-known brands : The insulated terminals produced by our company usually have stricter quality control and better after-sales service. You can choose a reliable brand by reading product reviews, consulting professionals, or referring to industry recommendations.

Certification mark : Make sure the insulated terminal has relevant certification marks, such as UL (Underwriters Laboratories) certification, CE (European Harmonization) certification, etc. These certification marks indicate that a product meets international or domestic safety standards.

4. Check product appearance and size

Appearance inspection

Check the appearance of the insulated terminal for defects such as cracks, deformation, burrs, etc. Good appearance indicates that the product has undergone strict quality control during the production process.

Check whether the insulation part of the terminal is even and smooth, without bubbles, impurities, etc. The quality of the insulating part directly affects the insulation performance of the terminal.

Dimensions match :

Select the appropriate size insulated terminal according to actual application requirements. Make sure the hole diameter of the terminal matches the diameter of the wire to ensure good contact and retention.

When selecting insulated terminals for multi-core cables, pay attention to whether the arrangement and spacing of the terminals are compatible with the core wire layout of the cable.

Tanigawa Electric provides you with product solutions. You can contact us at any time. The correct selection of insulated terminals requires comprehensive consideration of factors such as application requirements, type, quality and reliability, and appearance size. During the selection process, if you have any questions, you can consult a professional electrical engineer or supplier to ensure that appropriate insulated terminals are selected to ensure safe and reliable operation of the circuit.