Contact Parameters 1.1      Contact forms are the arrangements of relay contacts. The basic contact arrangements are shown in Table 1, the multi-contact arrangements can be ratiocinated. Table 1 Name Symbol Alphabet Letter China TIANYI or Others Normally Open Contacts H A (or NO) Normally Closed Contacts D B (or NC) Change-Over Contacts Z C (or […]

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In order to correctly select relays, customers need know the characteristics of the relays to ensure whether these characteristics meet with the practical requirements. It will be more reliable if these characteristics can be tested in the practical environment. The principles of selecting relays can be seen in table 4. In table 4, in the […]

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To properly use the relay, when the relay is selected and its characteristics are learnt, the precautions for using are required to be known and ensure the reliable operation of the relay. The following precautions will be considered in application: a) The relays are used within the range of the parameters listed in the catalogue, […]

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What is conformal Coating? Conformal Coating is a protective, dielectric coating designed to conform to the surface of an assembled printed circuit board. It is a chemical compound which forms a thin film like protective layer on the PCB when applied. It provides electrical insulation. Why use conformal coating? The circuit and components need to […]

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Rated Capacitance CR: The designed capacitance value, usually marked on the capacitor.   Capacitance Tolerance : Admitted capacitance deviation from the rated capacitance at 20°C   Rated Voltage UR:  The maximum direct voltage or the maximum rms alternating voltage or the peak value of a pulse voltage which may be continuously applied to a capacitor […]

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1. Fast acting or Time Delay? When an equipment or a circuit (especially Power Supply circuit) is switched on, there may be “in-rush” current for a short duration depending upon the type of load. This “in-rush” current versus time should be measured and matched with the time-current characteristics of fuses to select Fast Acting or […]

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Rated Capacitance CR: The designed capacitance value, usually marked on the capacitor.   Capacitance Tolerance : Admitted capacitance deviation from the rated capacitance at 20°C   Rated Voltage UR:  The maximum direct voltage or the maximum rms alternating voltage or the peak value of a pulse voltage which may be continuously applied to a capacitor […]

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