Cylindrical Style EMI Filters
JD Series – .690 Dia.
Hermetically Sealed – Circuits Available – C, L, π, T
APPLICATIONS
The JD series offers effective filtering from
14 KHz to 10 GHz. The large diameter,
increased length, restricted capacitance
values and conservative dielectrics of the
JD series are particularly important
design features for 400 Hz AC applica-
tions where high reactive currents and
the resultant heat dissipation must be
controlled. Glass sealed on both ends for
hermeticity, this series is impervious to
high moisture, solvents, or other severe
environmental conditions commonly
encountered in military applications. It is
designed for bulkhead mounting in a
slotted hole with nut and lockwasher
supplied.
inductors offer significant performance
advantages by suppressing and absorb-
ing the EMP pulse over a very broad
spectral range. Very high pulse currents
will occur within the EMI filter, however,
reradiation to sensitive electronic circuits
is prevented by the fully shielded case
design. In some cases a slight increase
in the case length of the filter is required
to provide space for the transient sup-
pression device.
The “L”, and the “T” designs are designed
to provide effective attenuation over a
wide range of circuit impedances. For
current ratings under 15 Amps toroidal
wound inductor elements offer increased
filter performance and protection against
circuit transients. Data showing the actual
inductance versus various levels of DC or
AC bias current are available as well as the
attenuation in any combination of source
and load impedance.
CHARACTERISTICS
• Designed to meet the require-
ments of DESC drawings
84083, 84084 and MIL-F-
28861/16 and /17.
The 230 VAC “T” section style is unique-
ly capable of handling very high pulse
inrush currents or overvoltage conditions
typical of EMP.
• Glass hermetic seal on both
ends.
In addition, transient voltage suppression
devices can be added to any of the JD
circuit designs to provide complete
circuit protection against EMP, lightning,
or voltage spikes such as MIL-STD-704.
These devices when combined with high
frequency attenuation characteristics of
the discoidal capacitor and toroidal
• Wound toroidal inductor used in
designs up to 10 Amps. 15
Amp designs incorporate ferrite
bead inductor.
Alternate lead configurations or special
capacitance/inductance values may be
ordered.
• Superior heat dissipation for
both 125 VAC and 230 VAC
designs.
Custom packages or filter arrays utilizing
the JD series can be furnished.
SPECIFICATIONS
1. Case/Terminal Plating:
Electro-tin standard –
C. Insulation Resistance:
At 25°C: 1,000 megohm-microfarad
min., or 50,000 megohms
min., whichever is less, at
the rated DC voltage
At 125°C: 100 megohm-microfarad
min., or 5,000 megohms
min., whichever is less
D. Dielectric Withstanding Voltage
(DWV):
5. Marking:
Standard Marking: AVX, AVX part
number, rated voltage, current, lot
number, schematic
Silver or gold available
2. Material:
Case: Brass standard – Steel available
End Seal: Mild steel
Terminals: Nickel-iron alloy
3. Operating Temperature Range:
-55°C to +125°C
NOTE: Schematic to indicate location of
inductor (standard or reverse) for
JD2 L-Section Filters.
See Reliability Codes section for
definition of Reliability Level marking.
See How to Order section for part
number construction.
4. Electrical Characteristics:
R-level designs:
A. Rated Voltage:
2.0 times rated DC voltage
Class B, Class S designs:
2.5 times rated DC voltage
3. Capacitance: Total capacitance listed in
chart for each filter type is “guaranteed
minimum value” (GMV)
6. Installation:
300 VDC/125 VAC, 400 Hz or
400 VDC/230 VAC, 400 Hz
B. Current Rating - see chart
A. Mounting Torque: 60 oz-in. 4 oz-in.
B. Refer to “Installation and Handling”
section of Filter Design Guide
42
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