56-U04-E01 Spectrum Control, 56-U04-E01 Datasheet - Page 44

• Manufacturer Part Number: 56-U04-E01
• Description: USB CONNECTOR, RECEPTACLE, 4POS, THD
• Manufacturer: Spectrum Control
• Series: USB-Er

Specifications of 56-U04-E01

• Connector Type: USB
• No. Of Contacts: 4
• Contact Termination: Right Angle Through Hole
• Connector Mounting: PCB
• Gender: Receptacle
• Contact Plating: Gold
• Product: USB Type A Connectors
• Standard: USB
• Number Of Ports: 1
• Features: Spectrum USB Filtered Connectors TYPE A R/A USB .05pF 5A 10VDC
• Insulation Resistance: 10 MOhms
• Mounting Angle: Right
• Number Of Positions / Contacts: 4
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

44
Terminology
Inductance
Inductance is the ability of a conductor to produce
induced voltage when the current varies. The symbol
for inductance is L and the unit is Henry (H).
Inductance of Spectrum Control’s inductors is measured
by using an HP4191A/HP4291A/HP4286A Impedance
Analyzer.
Impedance
Impedance is the measure of opposition to a current.
The symbol for impedance is Z and the unit is Ohm.
Where R is the resistance (not DC resistance) and X
the reactance. Z , R and X
Impedance of Spectrum Control’s chip beads is measured
by using an HP4291A/HP4286A Impedance Analyzer.
Direct Current Resistance (DCR)
DCR is the resistance of the component measured
with direct current. DCR of Spectrum Control’s inductive
components is measured by using an HP4338A
milli-ohmmeter.
Maximum Rated Current
Maximum rated current is a measure of the current
carrying capacity of the component. When the maximum
rated current is applied to the component, the temperature
rise shall not exceed 20°C.
Equivalent Circuit of an Inductor
Using an ideal resistor, an ideal capacitor and an ideal
inductor, a real inductor can be simulated. The resistor
component in an equivalent circuit comes from the DC
resistance of the electrode and the electromagnetic
loss. The capacitive component comes from the parasitic
capacitance of the coil.
SPECTRUM CONTROL INC. • 8031 Avonia Rd. • Fairview, PA 16415 • Phone: [phone] • Fax: [phone] • Web site: www.spectrumcontrol.com
SPECTRUM CONTROL GmbH • Hansastrasse 6 • 91126 Schwabach, Germany • Phone: [phone] • Fax: [phone]
1 H = 1,000 mH (milli Henry)
1 H = 1,000,000 µH (micro Henry)
1 H = 1,000,000,000 nH (nano Henry)
R
Z =
√
L
R
are all frequency dependent.
2
+ X
C
L
L
2
L
is
Self-Resonant Frequency (SRF)
When the frequency changes, the capacitive reactance
X
resonance frequency is the frequency at which the X
equals X
shows maximum impedance and a minimum line current.
The SRF shall generally be specified as at least twice
the application frequency, except for some special
applications. The SRF of Spectrum Control’s inductors
is measured by using an HP4291A Impedance
Analyzer/HP8753D Network Analyzer.
Quality Factor (Q)
Q is the quality factor of an inductor. It is the ratio of the
inductor’s ability to produce self-induced voltage over
the resistance that reduces the current and the induced
voltage. It can be considered as the ratio of the inductor’s
capability to store energy over the capability to consume
energy.
Q is highly dependent on frequency. Q values of Spectrum
Control’s inductors are measured by using an HP4291A
Impedance Analyzer/HP8753D Network Analyzer.
c
and inductive reactance X
c
. At self-resonance frequency, the inductor
Q = X
R
L
L
also change. The self-
L