Lead Pin Forming (Cutting or Bending) When cutting or bending the lead pin of the reed switch, care must be taken to avoid damaging the glass-metal seal by excessive pressure. Suitable clamping tools must be used. When cutting or bending the lead, the recommended distance between the miniature reed switch (the length of glass package is 9 ~ 20 mm) and the end of glass package is 3mm, and the large reed switch (the length of glass package exceeds 30mm) is 8 mm.. Due to the shortening of the external lead angle, the value of AT (ampere turns) will increase, so please consider this factor when designing. Similarly, the bending of external leads will also increase the AT value. When magnetic installation (welding and soldering) encounters too high temperature and too long contact time, it may lead to damage (cracking, breakage, etc. ) glass-to-metal sealing, so fast and reliable welding technology (process) must be adopted. The recommended welding conditions are: manual welding 280 ~ 300°C, wave welding 250 ~ 300 C.. When welding the pin wire of reed switch, the electromagnetic field generated by welding current will make the switch work, thus causing contact damage. Considering the welding current, voltage and time, special protective measures must be taken during welding. Never weld both pins of the reed switch at the same time. When mounted on a printed circuit board (PCB), attention must be paid to the deformation and thermal expansion characteristics of PCB, and the stress caused by these factors may also damage the glass-metal seal in the reed switch. When installing reed switch on PCB, it is suggested to form a guide angle between PCB and reed switch and leave a proper space, or insert reed switch into the opening (notch) of PCB. The impact and vibration of the reed switch when it falls to a hard surface (ground) from a height of more than 30cm, and its electrical characteristics (startup, release, etc. ) may change. After the reed switch falls, check and ensure that its characteristics are still within the acceptable range before actual use. This measure is also applicable to the case where tensile stress or torsional stress is applied to the reed switch. Do not dry the spring-induced load.

If electromagnetic relay, electromagnetic solenoid and electromagnetic meter with inductance elements are used as loads in the circuit, when the reed contact is disconnected, the energy stored in the inductance will cause reverse voltage. Although the voltage depends on the inductance, it may sometimes be as high as hundreds of volts, which becomes the main factor of contact aging. In order to prevent this from happening, the following protection circuits should be added when using. The tube is used when the resonance frequency is higher than its specified resonance frequency. capacitive load

If the capacitor is connected in series or parallel with the reed switch contact in the closed circuit, the surge current flowing in when the capacitor is charged and discharged will cause serious damage to the reed contact. External magnetic field interference When the reed switch and its excitation magnet or coil are installed near strong magnetic field interference sources such as steel plates and transformers, the working characteristics of the reed switch will be changed and misoperation may occur. The influence of various specific occasions is different, so this possible interference must be fully evaluated and certified before use. When multiple reed switches are used in very close positions, similar magnetic field interference may occur, which may lead to the change of working characteristics and misoperation. If this interference is found, the reed switch must be separated by more than15mm.