B82498B3820J EPCOS Inc, B82498B3820J Datasheet - Page 17

• Manufacturer Part Number: B82498B3820J
• Description: RF Inductors 82nH 150MHz 390mA 5%
• Manufacturer: EPCOS Inc

Specifications of B82498B3820J

• Dimensions: 1.2 mm W x 2.2 mm L x 1.4 mm H
• Test Frequency: 150 MHz
• Inductance: 82 nH
• Tolerance: 5 %
• Maximum Dc Current: 390 mA
• Maximum Dc Resistance: 0.21 Ohms
• Self Resonant Frequency: 1.43 GHz
• Q Minimum: 40
• Operating Temperature Range: - 55 C to + 125 C
• Termination Style: SMD/SMT
• Package / Case: 0805 (2012 metric)
• Inductance Tolerance: ± 5%
• Dc Resistance Max: 0.21ohm
• Dc Current Rating: 390mA
• Core Material: Ceramic
• Inductor Case Style: 0805
• No. Of Pins: 2
• Svhc: No SVHC (18-Jun-2010)
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8
8.1
We distinguish between economy potting and complete potting.
Economy potting is used to fix the the core and windings in the case and the windings on the core.
This is an economical technique which enables a single resin casting procedure to be used. Be-
cause of this, most chokes supplied by EPCOS are produced using this method.
Complete potting is only required when the thermal conductitvity of economy potting is not adequate
or if the customer has special demands. Complete potting requires several process steps to ensure
complete embedding of the core and the windings.
Economy potting
8.2
EPCOS uses different types of winding to suit the respective technical requirements:
– single-layer winding
– multilayer winding
– random winding
The different types of winding lead to different inductance characteristics, especially at high fre-
quencies.
Single-layer winding:
The winding pitch is equal to or greater than the wire diameter. The coil is wound in one direction
only. The only capacitances (parasitic capacitances) are those between one turn to the next. In
comparison to all other types of winding, this type of winding leads to the lowest possible capaci-
tances and thus the highest resonance frequencies.
General Technical Information
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1
2 3 4 5 6
2 3 4 5 6
Mechanical properties
Potting (economy potting, complete potting)
Types of winding
7 8 9 10 11 12 13 14 15 16 17 18
7 8 9 10 11 12 13 14 15 16 17 18
25
Complete potting
04/00
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