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About the Reed Relay DP1B12-10

Reed Relay DP1B12-10 is located on the Therapy Defibrillator Board 9F5238 ZK3266 assembly of FUKUDA FC-1760 Defibrillator. It is a very important part of the defibrillator. You can test whether there is high voltage here by using a relay pen. The contact form of the reed relay depends on the reed switch used, and there are three forms: normally open (H), normally closed (D) and switching (Z). The tongue reeds of the normally open reed switch are fixed at both ends of the glass tube. Under the action of the coil (magnet), the magnetism generated by one end is exactly opposite to that of the other end. Therefore, the two contact points rely on the "opposites of magnetism to attract each other." "Overcoming the elastic force of the spring piece and closing; the tongue reed of the normally closed dry reed rod is fixed at the same end of the glass tube. Under the action of the external magnetic field, the magnetism generated by the two is the same, so the two contacts rely on "same-sex repulsion" It overcomes the elastic force of the tongue reed and breaks; adding a normally open tongue reed on the basis of the normally closed tongue reed forms a conversion contact.

Reed relays are mainly composed of dry reeds and excitation coils. The dry tongue reed (contact) is sealed and made of iron-nickel alloy. The contact part of the tongue is usually plated with precious metals (such as gold, rhodium, palladium, etc.), which has good contact and excellent electrical conductivity. The contacts are sealed in a glass tube filled with inert gases such as nitrogen, thus effectively preventing dust contamination, reducing contact corrosion, and improving working reliability.