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ELJ-FA4R7JF Datasheet(PDF) 8 Page - Panasonic Semiconductor
PANASONIC [Panasonic Semiconductor]
ELJ-FA4R7JF Datasheet(HTML) 8 Page - Panasonic Semiconductor
/ 8 page
Design and speciﬁcations are each subject to change without notice. Ask factory for the current technical speciﬁcations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Fixed Inductors (Chip Inductors)
Precautions for use
1.Operation range and environments
1 These products are designed and manufactured for general and standard use in general electronic
equipment (e.g. AV equipment, home electric appliances, office equipment, information and communication
2 These products are not intended for use in the following special conditions. Before using the products, carefully check
the effects on their quality and performance, and determine whether or not they can be used.
• In liquid, such as water, oil, chemicals, or organic solvent
• In direct sunlight, outdoors, or in dust
• In salty air or air with a high concentration of corrosive gas, such as Cl
, or NO
• In an environment where these products cause dew condensation
1 Do not bring magnets or magnetized materials close to the product. The inﬂuence of their magnetic ﬁeld can
change the inductance value.
2 Do not apply strong mechanical shocks by either dropping or collision with other parts.
Excessive schock can damage the part.
3. Land pattern design
1 Please refer to the recommended land pattern for each type shown on the datasheet.
2 Avoid placing the chip inductor on any metal pattern except the recommended land pattern because a drop of Q
and mutual conductance may occur.
3 In case of ﬂow soldering, venting of soldering ﬂux gases should be made for high density assemblies to get a
good solder connection.
4 In case of reﬂow soldering, consider the layout because taller components close to chip inductor tend to block
1 In general, magnetic and electric characteristics of ferrite cores can be changed by applying excessively strong
force. Placement force should not exceed 20 N.
2 Do not bend or twist the PWB after mounting the part.
1 Do not use acid or alkali agents. Some cleaning solvents may damage the part.
Conﬁrm by testing the reliability in advance of mass production.
2 If Ultrasonic cleaning is used, please conﬁrm the reliability in advance.
It is possible that combined resonance of component and PWB and cavitation can cause an abnormal vibration
mode to exist causing damage.
6. Caution about applying excessive current
The rated current is deﬁned as the smaller value of either the current value when the inductance drops 10 %
down from the initial point or the current value when the average temperature of coil inside rises 20 °C up from
the initial point. Do not operate product over the speciﬁc max. current.
(Common precautions for Chip Inductors)
• When using our products, no matter what sort of equipment they might be used for, be sure to make a written
agreement on the specifications with us in advance. The design and specifications in this catalog are subject
to change without prior notice.
• Do not use the products beyond the speciﬁcations described in this catalog.
• This catalog explains the quality and performance of the products as individual components. Before use, check
and evaluate their operations when installed in your products.
• Install the following systems for a failsafe design to ensure safety if these products are to be used in equipment
where a defect in these products may cause the loss of human life or other signiﬁcant damage, such as damage to
vehicles (automobile, train, vessel), traffic lights, medical equipment, aerospace equipment, electric heating
appliances, combustion/gas equipment, rotating equipment, and disaster/crime prevention equipment.
✽ Systems equipped with a protection circuit and a protection device
✽ Systems equipped with a redundant circuit or other system to prevent an unsafe status in the event of a single fault
Package markings include the product number, quantity, and country of origin.
In principle, the country of origin should be indicated in English.
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