Bolt Style EMI Filters
SP Series – 12-32 Thread - Epoxy Sealed –
Circuits Available – C, L, ¹
APPLICATIONS
The SP series provides increased filtering
in the HF through MICROWAVE frequen-
cy spectrums from 100 KHz through 10
GHz. The larger hex size means that
much higher values of capacitance are
available and that a 125 VAC/400 Hz rat-
ing is available in certain values. Also
designed for mounting in a tapped bulk-
head or with the standard nut and lock-
washer provided, it is optimum in medium
to low impedance circuits where significant
amounts of capacitance to ground can
be tolerated. In the “L” and “¹” section
versions an internal ferrite bead element
provides both inductance and series
resistance (lossy characteristic) which
improves the insertion loss rolloff to 40 dB
and 60 dB per decade respectively.
Alternate lead diameters or lengths are
available both with and without a nailhead.
CHARACTERISTICS
• Designed to meet or exceed the applica-
ble portions of MIL-F-28861/9. See QPL
listing.
• ¹ design offers steeper insertion loss
rolloff.
• Features rugged monolithic discoidal
capacitor construction.
• Conservatively rated for 125 VAC/400
Hz in certain values.
• Epoxy seal on both ends.
STANDARD CONFIGURATION
SPECIFICATIONS
.157
.250
±.010
1. Plating: Silver standard –
.216 UNEF-2A
.040
Electro-tin or gold available
(12-32)
MAX.
.045
2. Material:
.032 ±.002
(Std. - See Note 2)
Case: Cold rolled steel standard, brass
available
Leads: Half/hard copper
.250
.311
3. Operating Temperature Range:
-55°C to +125°C
.020
±.005
.343
±.020
.921
±.020
4. Insulation Resistance:
(Std. - See Note 1)
At 25°C: 1,000 megohm-microfarad
min., or 100,000 megohms
min., whichever is less
millimeters (inches)
ALTERNATE CONFIGURATION (SC SERIES)
0.05 (.002) 2.36 (.093)
0.13 (.005) 3.99 (.157)
0.18 (.007) 4.75 (.187)
0.25 (.010) 5.49 (.216)
0.51 (.020) 6.12 (.241)
0.58 (.023) 6.35 (.250)
0.79 (.031) 7.90 (.311)
0.81 (.032) 8.71 (.343)
1.02 (.040) 9.45 (.372)
1.14 (.045) 9.73 (.383)
1.60 (.063) 23.39 (.921)
(See Note 5)
12-32 UNEF-2A
.187
±.005
.093
MAX.
At 125°C: 100 megohm-microfarad
min., or 10,000 megohms
min., whichever is less
20 GAUGE
(.032)
5. Dielectric Withstanding Voltage (DWV):
R-level designs:
.032
±.005
.250
±.005
2.0 times rated DC voltage
.250 DIA.
±.005
.311
.157
±.005
.343
±.020
Class B, Class S designs:
2.5 times rated DC voltage
±.005
.921
±.020
1.85 (.073)
—
—
6. DC Resistance (DCR): .01 ohm,
maximum
(See Note 4)
Notes:
7. Dissipation Factor (DF): 3% maximum
8. Rated DC Current: 10 Amps, maximum
1. Nailhead standard, straight lead available.
2. Lead diameters other than .032" available.
4. Metric equivalent dimensions given for infor-
mation only.
5. Small-hex version may be specified for selected
capacitance/voltage ratings. Contact AVX
Filters Engineering for availability.
3. SP2 L-Section Filters have inductor (bead) at
threaded end.
9. Recommended Mounting Torque:
64 oz-in. ± 4 oz-in.
10. Supplied with mounting nut and lock-
washer - See Filter Design Guide Screw
and Locking Washer Table
CIRCUIT DIAGRAMS
THRD
END
11. Insertion Loss for the “C”, “L” and “¹” cir-
cuits are equivalent due to the saturation
characteristic of the ferrite bead element
at full rated current. At lower currents the
“L” and “¹” become much more effective.
L2
C
Pi
SP1
SP2 (See Note 3)
SP3
25