RELAYS Panasonic

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Panasonic is part of a large worldwide groupselling relays and associated switching products under different brand names in different territories.The conditions of use in some territories may differ from those customary in Europe. In particular there are often major differences in regard to national and international specifications, such as UL, CSA, VDE, SEV, EVE, SEMKO, etc. Thus, when considering contact loads as stated in this catalogue (e.g. 10 A, 30 VDC for the SP relay) its hould be understood that these values are not necessarily an absolute maximum but tested ratings. Mostly the stated value has been tested for a certain life expectancy as stated by the manufacturer or the respective test house. Thus, under different conditions, the stated “maximum” may, in practice, be safely exceeded.

Vydal: Panasonic Electric Works Czech s.r.o. Autor: Panasonic

Strana 967 z 1090

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Even for the same circuit, pattern design considerations which minimize the influence the on/off operations the relay coil and lamp on other electronic circuits are necessary. simple design consideration can change the safety the operation.g. T B2 Tr Relay coil currents consist only and B1. Solder flowing through such a hole may cause damage such a broken seal. Place the surge absorber (diode, etc. The instant the contacts close, the voltage drops and the relay releases chatters. tte s Since relays affect electronic circuits by generating noise, the following points should noted. 28 ds_x61_en_relay_technical_information_091112D . Avoid through-holes places which cannot be seen from the top (e. Keep relays away from sem iconductor devices. c CO 2 r The hole diam eter and land are made with the hole slightly larger than the lead wire that the com ponent may be inserted easily. Figure shows example the modified circuit.Applications Relays Electronic Circuits 2 tio lta o R t In the circuit shown Figure 19, rush current flows from the lamp capacitor. Design the pattern traces for shortest lengths. the base the relay). /Relay coil Good Ry Relay coil currents and electronic circuit flow together trough and B. / Figure 19 I Figure 20 Figure 21 [7] BOARD DESIGN CONSIDERATIONS 1. Also, when soldering, the solder will build eyelet condition, increasing the mounting strength. (No good) A a _______ Avoid routing pattern traces susceptible to noise (such for audio signals) underneath the relay coil section.) near the relay coil. Electronic circuit currents consist only and B2. Figure shows battery-powered version. In this case necessary raise the transform er's capacity add smoothing circuit