Related Manuals for Panasonic ASCT1F46E
Summary of Contents for Panasonic ASCT1F46E
- Page 2 Mounting, Connection Other items c) Size d) Protection construction Panasonic Electric Works Oct. 1, 2008: 1 Contents Consideration points regarding selection - Select relay with consideration for power source ripple. - Give sufficient consideration to ambient temperature and for the coil temperature rise, and hot start.
- Page 3 4. Load, 1. General Contact performance is significantly influenced by voltage and current values applied to the contacts (in Electrical life particular, the voltage and current waveforms at the time of application and release), the type of load, frequency of switching, ambient atmosphere, contact switching speed, and of bounce, which lead the various other damages such as unsuitable operation contact transfer, welding, abnormal wear, increase in contact resistance.
- Page 4 Please test adequately, for example when a relay is operated by external manual switch (such as key switch.) 16. High- When the switching frequency is high, the electrical life may decrease. Please confirm if there is a frequency high-frequent switching caused by abnormal mode in actual use condition.
- Page 5 Avoid using the protection circuits shown in the figures below. Although it is usually more difficult to switch with DC inductive loads compared to resistive loads, use of the proper protection circuit will raise the characteristics to that for resistive loads.
- Page 6 4. Load, 23. Connection Connect the load to one side of the power supply as shown in Fig. (a). Connect the contacts to the other electrical of load side. This prevents high voltages from developing between contacts. If contacts are connected to both life side of the power supply as shown in Fig.
- Page 7 5. Coil 4.Twin-relay For relays which have multiple coils such as twin relay for forward-reverse operation of motor, if the coils impressed coil are continuously turned on at the same time, the coil temperature may exceed the tolerance in a short voltage simultaneous time due to heat generation of each coil.
- Page 8 6. Coil 1. Relay drive 3. Snap action (Characteristic of relay with voltage rise and fall) impressed by means of It is necessary for the relay coil not to impress voltage slowly but to impress the rated voltage in a short circuit a transistor time and also to drop the voltage to zero in a short time.
- Page 9 3. In case of the load for temperature control whose load is a high current load such as a heater, some relays switch only peak values and some other relays switch only zero phase values as a phenomenon of this type of control. (Depending upon the sensitivity and response speed of the relay) 4.
- Page 10 ７. Contact 1. Load switch When switching with a very small load after switching with a large load, “contact failure by small load reliability switching” may occur due to particles generated during switching of the contact with large load. Please note that or contact us.
- Page 11 12. Usage 1.Temperature, During usage, storage, or transportation, avoid locations subject to direct sunlight and maintain normal ambient humidity, temperature, humidity, and pressure conditions. condition air pressure The allowable specifications for environments suitable for usage, storage, and transportation are given below.
- Page 12 12. Usage 8. Water Select the sealed-type for exposure to water. In the case of water exposure in severe conditions or ambient resistance immersion, please verify water resistance of the relay or contact us. Even for sealed-type relays, its condition terminals are not waterproof, so please avoid a failure such as terminal corrosion.
- Page 13 14. PC board 2. Hole and The Hole and Land diameter are made with the hole slightly larger than the lead wire so that the design Land component may be inserted easily. Also, when soldering, the solder will build up in an eyelet condition, diameter increasing the mounting strength.
- Page 14 15. PCB 1. Through-hole type mounting In keeping with making devices compact, it is becoming more common to solder the relay to a PC board along with the semiconductors instead of using the previous plug-in type in which relays were plugged into sockets. With this style, loss of function may occur because of seepage into the relay of flux, which is applied to the PC board.
- Page 15 4. Soldering 5. Cooling 6. Cleaning 7. Coating Automatic Soldering • Flow solder is the optimum method for soldering. • Adjust the level of solder so that it does not overflow onto the top of the PC board. • Unless otherwise specified, solder under following conditions...
- Page 16 15. PCB 2. SMD type mounting To meet the market demand for downsizing to smaller, lighter, and thinner products, PC boards also need to proceed from insertion mounting to surface mounting technology. To meet this need, we offer a line of surface mount relays. The following describes some cautions required for surface mount relay installation to prevent malfunction and incorrect operation.
- Page 17 3. Examples of SMT Applications 1. Infrared Reflow Soldering (IRS) 2. Vapor Phase Soldering (VPS) 3. Belt conveyer reflow oven 4. Double Wave Soldering (DWS) 5. Other Technologies 2. Cautions for installation 1. Paste Soldering 2. Relay mounting IRS is the most popular reflow soldering technology now available for surface mounting. It uses a sheath heater or infrared lamp as its heat source.
- Page 18 3. Reflow 4. Cooling / Cleaning Reflow soldering under inadequate soldering conditions may result in unreliable relay performance or even physical damage to the relay (even if the relay is of surface mount type with high heat resistance). 1.IRS profile Note: When a soldering technique other than above is to be used (hot air, hotplate, laser, or pulse heater technique), carefully investigate the suitability of the technique.
- Page 19 16. Soldering 1. Solder 2. Cleaning 3. Terminal clinch 17. Storage, 1.Transportation transportation 2. Storage 18. Product 1. Tube packing handling Please use the flux-resistant type or sealed type in the case of automatic soldering. Please use the sealed type for cleaning. Also, use the alcohol type for cleaning liquid and avoid ultrasonic cleaning.
- Page 20 19. Reliability [1] What is Reliability? 1. Reliability in a Narrow Sense of the Term In the industrial world, reliability is an index of how long a particular product serves without failure during use period. 2. Reliability in a Board Sense of the Term Every product has a finite service lifetime.
- Page 21 1. Degree of Reliability Degree of reliability represents percentage ratio of reliability. For example, if none of 10 light bulbs has failed for 100 hours, the degree of reliability defined in, 100 hours of time is 10/10 = 100%. If only three bulbs remained alive, the degree of reliability is 3/10 = 30%. The JIS Z8115 standard defines the degree of reliability as follows: The probability at which a system, equipment, or part provides the specified functions over the intended duration under the specified conditions.
- Page 22 [3] Failure 1. What is Failure? Failure is defined as a state of system, equipment, or component in which part of all of its functions are impaired or lost. 2. Bathtub Curve Product's failure rate throughout its lifetime is depicted as a bathtub curve, as shown below. Failure rate is high at the beginning and end of its service lifetime.
- Page 23 3. Weibull Analysis Weibull analysis is often used for classifying a product's failure patterns and to determine its lifetime. Weibull distribution is expressed by the following equation: where Weibull distribution can be adopted to the actual failure rate distribution if the three variables above are estimated. The Weibull probability chart is a simpler alternative of complex calculation formulas.
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Page 24: Check Sheet
□ Load/ Electrical life Doesn't switching continue for a long time? □ Does it switch under high temperature? □ Have precautions been checked for using of coil surge absorption □ circuit? Have you checked there is no sneak current or voltage to the relay coil? □... - Page 25 Check Category Have precautions been checked in the case of switching with both high □ Contact and low loads by the same contact? reliability Doesn't heat dissipation occur under low temperature? □ Has transient state of contact resistance been considered? □...