PE-1008CM621KTT PULSE ELECTRONICS CORPORATION, PE-1008CM621KTT Datasheet - Page 27
![no-image](/images/manufacturer_photos/0/5/547/pulse_electronics_corporation_sml.jpg)
PE-1008CM621KTT
Manufacturer Part Number
PE-1008CM621KTT
Description
INDUCTOR WW 620NH 25MHZ 1008
Manufacturer
PULSE ELECTRONICS CORPORATION
Series
1008CMr
Type
Ceramic Core, Wirewoundr
Datasheet
1.PE-0805CM561JTT.pdf
(30 pages)
Specifications of PE-1008CM621KTT
Inductance
620nH
Current
200mA
Tolerance
±10%
Dc Resistance (dcr)
1.9 Ohm Max
Q @ Freq
45 @ 100MHz
Self Resonant Freq
375MHz
Package / Case
1008 (2520 Metric)
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 125°C
Frequency - Test
25MHz
Material - Core
Ceramic
Applications
General Purpose
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Shielding
-
Current - Saturation
-
Current - Temperature Rise
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PE-1008CM621KTT
Manufacturer:
PULSE
Quantity:
60 000
The Inductor Basics
An inductor is formed by winding a wire around a ceramic or ferrite core to increase the magnetic flux linkage between
the turns of the coil. The majority of high frequency inductors above 50MHz are formed on a ceramic bobbin or sub-
strate. Nonmagnetic cores (ceramic cores) have the opposite effect to a magnetic core in that they reduce instead of
increase the inductance of the coil. Ceramic cores are mainly used to reduce the RF core losses as the high frequency
currents mainly flow near the surface of the conductor. The resistance that a conductor offers to the high frequency
alternating current is much greater than the resistance of the same conductor to direct current (dc) and is known as the
skin effect. The skin effect is a characteristic of conductors that carry alternating current and is much more pronounced
in coils than in straight conductors.
Consequentially, as the instantaneous value of the alternating current changes the inductance of a conductor in its
interior is much greater than the instantaneous inductance near its surface. The result is more current flows near the
surface or "skin" of the conductor than at its centre. Since the inductance of the coil increases proportionally to the
increasing frequency, the skin effect also increases as the frequency is increased.
so dielectric losses can not be avoided at very high frequencies. Dielectric losses, like skin effect also tend to increase
the effective resistance of a coil at high frequencies.
prone to changing its performance over frequency. Figure 1.0 illustrates what a real world inductor looks like at RF fre-
quencies and the resultant equivalent circuit.
Fig. 1.0 A shows how capacitive coupling (Cd) can occur between two wires, when the wires are placed in close prox-
imity to one another and only separated by a dielectric. The resistance (Rs) is a representation of the wire resistance
that exists in a wire. Fig. 1.0 B shows a representation of the lumped resistive, capacitive and inductive component
elements of an inductor.
www.pulseeng.com
WIRE-WOUND
RF CHIP INDUCTORS
Application Notes
Skin effect causes the current in the conductor to be much denser near the surface of the conductor than at its centre.
Another source of loss is the dielectric material used to form the body of the inductor. There is no perfect insulator and
Whilst there is no perfect component compared to a resistor or capacitor, inductors are probably the component most
USA 858 674 8100
• •
Series Resistance in an Inductor
Germany 49 7032 7806 0
Distributed Capacitance and
Fig. 1.0 A
• •
Singapore 65 6287 8998
25
• •
Shanghai 86 21 62787060
Equivalent Circuit of an Inductor
Fig. 1.0 B
• •
China 86 755 33966678
• •
Taiwan 886 3 4356768
WC701.L (4/10)