Bolt Style EMI Filters
SN Series – 12-32 Thread - Hermetically Sealed –
Circuits Available – C, L,
¹
APPLICATIONS
The SN series offers effective filtering
from 1 MHz to 10 GHz. Glass sealed on
both ends for hermeticity, this series is
impervious to high moisture, solvents, or
other severe environmental conditions
commonly encountered in military applica-
tions. It is designed for bulkhead mounting
with nut and lockwasher supplied.
The feedthru designs yield constant filter-
ing as current level is increased from
no-load to full rated load. They are most
effective when placed in high impedance
circuits. The
¹
-section designs exhibit
sharper roll-off in filter characteristic and
perform effectively when used in medium
to low impedance circuits.
Alternate lead configurations or special
capacitance values and voltage ratings
may be ordered.
CHARACTERISTICS
• The hermetic bolt-style design was
developed to meet or exceed the
applicable portions of MIL-F-28861/10.
The filter is assembled with a glass her-
metic seal on both ends. The rugged
monolithic capacitor element is a low
inductance design that yields superior
bypass performance. The
¹
-section
design contains two capacitor elements
together with a ferrite bead inductor.
• Certain feedthru designs are rated for
115 VAC/400 Hz applications. The 200
VDC
¹
-section design is rated for DC
applications only.
SPECIFICATIONS
1. Plating: Silver standard – Electro-tin or gold
available
STANDARD CONFIGURATION
2. Material:
Case: Cold rolled steel standard, brass available
.220
.250
MAX.
Leads: Copper nailhead standard. Only available
±.010
.216-32 UNEF-2A
.040
in .032" diameter. Beryllium copper lead
(12-32)
MAX.
available. Straight lead available.
.032
±.002
3. Operating Temperature Range:
-55°C to +125°C
4. Electrical Characteristics:
A. Capacitance: Guaranteed Minimum Value
(GMV) as listed
.250
±.005
B. Insulation Resistance:
.311
At 25°C: 1,000 megohm-microfarad
±.005
min., or 100,000 megohms
.921
.343
min., whichever is less
±.020
±.020
At 125°C: 100 megohm-microfarad
min., or 10,000 megohms
CIRCUIT DIAGRAMS
min., whichever is less
C. Dielectric Withstanding Voltage (DWV):
R-level designs:
L
2
2.0 times rated voltage
C
Pi
Class B, Class S designs:
2.5 times rated voltage
SN2
SN1
SN3
D. DC Resistance (DCR): .01 ohm, maximum
Notes:
millimeters (inches)
E. Voltage Drop: 0.1 volt, maximum
0.05 (.002) 1.85 (.073)
F. Dissipation Factor (DF): 3% maximum
1. Metric equivalent dimensions
given for information only.
0.13 (.005) 3.99 (.157)
G. Rated Current: 10 Amps, maximum
0.18 (.007) 5.49 (.216)
5. Seal: In accordance with MIL-F-28861.
Leakage rate for Class S designs shall not
0.25 (.010) 6.12 (.241)
exceed 1 x 10
-7
atm cc/sec.
0.51 (.020) 6.35 (.250)
6. Marking: Standard (AVX symbol, AVX part
0.58 (.023) 7.90 (.311)
number)
0.79 (.031) 8.71 (.343)
7. Installation: Filter is supplied with mounting nut
0.81 (.032) 9.45 (.372)
and lockwasher. The recommended mounting
1.02 (.040) 9.73 (.383)
torque is 64 oz-in. ± 4 oz-in. Refer to the
1.14 (.045) 23.39 (.921)
“Installation and Handling” section for additional
1.60 (.063)
—
—
information.
(See Note 1)
27
Bolt Style EMI Filters
SN Series – 12-32 Thread - Hermetically Sealed –
Circuits Available – C, L,
¹
SPECIFICATIONS
AVX
P/N
SN1C1-204
SN2C1-204
SN3C1-124
SN1A1-503
SN1A1-104
SN2A1-503
SN3A1-753
SN1L1-102
SN1L1-502
SN1L1-103
SN1L1-253
SN2L1-102
SN2L1-502
SN2L1-103
SN3B1-152
SN3B1-123
1
CKT
C
L2
¹
C
C
L2
¹
C
C
C
C
L2
L2
L2
¹
¹
CAP
1
.20
.20
.12
.05
.10
.05
.075
1000
5000
.01
.025
1000
5000
.01
1500
.012
Voltage
50
50
50
100
100
100
100
200*
200*
200*
200*
200*
200*
200*
200
200
DCR
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
1
MHz
26
26
20
15
20
15
18
–
–
4
8
–
–
4
–
–
Insertion Loss
2
Per MIL-STD-220, +25°C
10
100
200
1
MHz
MHz
MHz
GHz
39
52
60
70
38
65
70
70
38
70
70
70
35
42
50
70
38
48
53
70
36
54
60
70
38
70
70
70
4
20
25
40
15
34
41
50
21
35
40
55
28
36
44
64
4
20
27
45
15
35
41
55
21
35
38
65
8
20
45
70
12
60
70
70
10
GHz
70
70
70
70
70
70
70
50
55
60
70
70
70
70
70
70
* Rated 200 VDC or 125 VAC/400 Hz
Decimal point values indicate capacitance in microfarads.
Non-decimal point values indicate capacitance in picofarads.
Insertion loss limits are based on theoretical values.
Actual measurements may vary due to internal capacitor
resonances and other design constraints.
2
28
Screw & Locking Washer Table
HEX NUT AND INTERNAL TOOTH LOCKWASHER
THREAD
A
HEX NUT
B
C
WASHER
D
Size Thread
4-40 UNC-2B
(.112-40)
A
.187*
.180
.257
.241
.250*
.241
.313
.307
.250
.241
.345
.336
.250
.241
.250*
.241
.311*
.308
.377*
.365
Hex Nut
B
.067*
.057
.083
.073
.083*
.073
.114
.104
.080
.070
.130
.120
.083
.073
.073*
.063
.096*
.091
.096*
.091
C
.225*
.215
.265
.255
.285*
.275
.336
.325
.311
.300
.381
.370
.383
.372
.383*
.372
.408*
.396
.435*
.425
Lockwasher
D
.020*
.010
.018
.012
.025*
.015
.025
.015
.023
.013
.027
.017
.023
.013
.023*
.013
.021*
.015
.027*
.017
(STD)
(ALT)
8-32 UNC-2B
(.164-32)
(STD)
(ALT)
10-32 UNF-2B
(.190-32)
(STD)
(ALT)
12-32 UNEF-2B
(.216-32)
(STD)
(ALT)
1/4-28 UNF-2B
(.250-28)
5/16-24 UNF-2B
(.312-24)
*Used for MIL-F-28861 units.
Thread
(.112-40)
4-40 UNC-2A
(.164-32)
8-32 UNC-2A
(.190-32)
10-32 UNC-2A
(.216-32)
12-32 UNEF-2A
(.250-28)
1/4-28 UNF-2A
(.312-24)
5/16-24 UNF-2A
Recommended Mounting Torque
32 oz-in. ± 4 oz-in.
64 oz-in. ± 4 oz-in.
64 oz-in. ± 4 oz-in.
64 oz-in. ± 4 oz-in.
44 oz-in. ± 4 oz-in.
60 oz-in. ± 4 oz-in.
4
How To Order
Notes
NOTE 1:
CAPACITANCE CODE
All AVX Filters part numbers, with exception of certain cylin-
drical styles, show total filter capacitance using the 3-digit
EIA code. The first two digits are significant: the last digit is
the multiplier.
Example:
103=10000 picofarads
125=1200000 picofarads
(1.2 microfarads)
It is important to note that
¹
filters and multisection filters are
described using the EIA code from the standpoint of total
capacitance. Capacitance is understood to be specified
as “guaranteed minimum value” (GMV) unless otherwise
specified. AVX Filters can supply ±20% or other specified
tolerances at an additional charge. Contact AVX Filters
Applications Engineering for further information.
NOTE 4:
VOLTAGE CODES AND FILTER
VOLTAGE RATINGS
IMPORTANT:
please contact AVX Filters Applications
Engineering when considering DC-rated filter designs for
possible use in AC applications. As a general rule, DC
designs may be derated for AC applications. Let us assist
you.
The voltage code letters must be selected consistent with
the capabilities as outlined in the product selection tables for
a given filter type. It is important to note that the same code
letter may signify a different voltage rating depending upon
filter type. For example: the “L” code signifies a 200
VDC/125 VAC rating for a bolt-style filter, but it describes a
300 VDC/125 VAC design when applied to a JD-style filter.
NOTE 2:
RELIABILITY CODES
The customer must select the reliability code to be consis-
tent with the filter application. As a minimum, all catalog
filters are available as R-level designs.
Options:
“-” signifies an R-level filter design without the optional
R-level high-rel screening
“R” R-level design with optional R-level high-rel screening
also specified
“B” Class B design with Group A screening per M28861 for
Class B filters
“S” Class S design with Group A screening per M28861 for
Class S (space grade) filters
Please refer to the catalog section on Reliability for additional
information on how to select reliability codes.
NOTE 5:
TERMINAL AND LEADWIRE CODES
Non-standard terminal configurations including special
materials or finishes are available. Please indicate a descrip-
tion and/or outline drawing when requesting a non-standard
terminal (code “3”).
NOTE 6:
SPECIAL INFORMATION FOR
CYLINDRICAL STYLE FILTERS
L-section filter designs must be specified with regard to
“standard” or “reverse” configuration. The L-section filter is
normally utilized with the capacitor on the high impedance
side of the circuit and the inductor looking into the low
impedance side. Compact filter types such as the BK2
or CK2 button filters with ferrite bead inductors are only
supplied with the bead assembled into the threaded end.
GK2 and JD2 L-section filters are normally supplied with
a schematic or other marking to indicate location of the
inductor.
AC-rated catalog designs incorporate reduced values of
capacitance to limit reactive current heating (and subsequent
filter temperature rise) to safe levels. Do not specify a
DC-rated filter with larger capacitance for an AC application
without contacting AVX Filters Applications Engineering.
NOTE 3:
SPECIAL DESIGN CODE
(ASSIGNED BY AVX FILTERS)
A special suffix to the standard part number will be added by
AVX Filters Applications Engineering to describe special
designs or designs that are controlled by customer specifi-
cations. It is important to note that even in those instances
where a customer drawing describes a standard catalog
design it is AVX Filters policy to assign a special part number
to the customer drawing for configuration control.
51
How To Order
Part Number Construction
SOLDER-IN STYLE
Z
S
2
C
2
–
1
0
3
H
X
X
Basic Style
zz
Z
Y
X
W
Glass Seal
Orientation
S - Standard
R - Reverse
Q - Hermetic
(Glass Both
Sides)
N - No Glass
(Epoxy Both
Sides)
Circuit
0 - Non-Feed
Thru Post
1 - Feed Thru
2 - L-Section
Voltage
A - 100 VDC
B - 200 VDC
C - 50 VDC
E - 400 VDC/
230 VAC
F - 500 VDC
G - 1000 VDC
K - 250 VDC
L - 300 VDC or
200 VDC/
115 VAC
M - 350 VDC
N - 70 VDC
Reliability
Code
See Notes
Use “H”
to specify
Hi-
Temperature
(300°C)
Rated
Design
Y - Solder
Lead
2 - Nickel Iron
(Standard)
3 - Special
4 - Aluminum
Compatible with
seating flange
(Std. Lead)
5 - Aluminum
Compatible with
seating flange
(Special Lead)
D - Aluminum
Compatible with
centering flange
(Std. Lead)
E - Aluminum
Compatible with
Centering flange
(Special Lead)
F - Aluminum
Compatible with
Special Design
3-Digit
Capacitor
Code
(In pF)
Special
Design
(Customer
DWG. or QPL
Designation)
BOLT STYLE
SB
2
A
1
–
1
0
3
X
X
Circuit
1 - Feedthru (C)
2 - L-Section (L)
3 - PI-Section (¹)
Basic Style
SA-4-40
Epoxy Sealed
SG-6-32
Epoxy Sealed
SB-8-32
Epoxy Sealed
SM-8-32
Hermetic Sealed
SH-10-32 Epoxy Sealed
SJ-12-28 Epoxy Sealed
SC-12-32 Epoxy Sealed (.187 Hex)
SP-12-32 Epoxy Sealed (.250 Hex)
SN-12-32 Hermetic Sealed
SL-1/4-28 Epoxy Sealed
SD-5/16-24 Epoxy Sealed
SF-5/16-32 Epoxy Sealed
Voltage
A - 100 VDC
B - 200 VDC
C - 50 VDC
F - 500 VDC
G - 1000 VDC
H - 150 VDC
J - 600 VDC
K - 250 VDC
L - 200 VDC/
125 VAC
M - 350 VDC
N - 70 VDC
Reliability
Code
(-See Note 2)
Special Design
(-See Note 3)
Terminal
1 - Copper
2 - Steel
3 - Special Lead
Design
4 - Beryllium
Copper
3-Digit Capacitor
Code
(-See Note 1)
52
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