Inches/mm
2 x size
±.005

Repeatable Inductance and High Q
L3901 SERIES

ASSEMBLY PART NO.
COLOR CODE
MAGNETIC MATERIAL (1)
FREQUENCY RANGE (2)
MATERIAL PERMEABILITY
ASSEMBLY ALnH/turns2 (3)
MAX µh
100 turns
MIN µh (4)
100 Turns
TEMPERATURE STABILITY (5)
L3901-1-PCT-B-4
BLUE
CARBONYL C
.15-2.0 MHz
20.0
17.5
175
58
280 ppm/° C
L3901-2-PCT-B-4
RED
CARBONYL E
.25-10 MHz
10.0
12.5
125
52
95 ppm/° C
L3901-3-PCT-B-4
GREY
CARBONYL HP
.02-1.0 MHz
35.0
20.4
204
64
370 ppm/° C
L3901-6-PCT-B-4
YELLOW
CARBONYL SF
2.0-50 MHz
8.5
11.5
115
47
35 ppm/° C
L3901-7-PCT-B-4
WHITE
CARBONYL TH
1.0-20 MHz
9.0
12
120
48
30 ppm/° C
L3901-10-PCT-B-4
BLACK
CARBONYL W
10-100 MHz
6.0
10
100
46
150 ppm/° C
L3901-17-PCT-B-4
LAVENDER
CARBONYL
20-200 MHz
4.0
6.7
6.7
45
50 ppm/° C

1) The iron powder materials are used in a portion of the base, the tuning core and cup core. Mix 3F is a combination of a ferrite tuning core and an iron powder cup core.

2) This represents the frequency range for Q optimization in tuned or resonant circuits. The inductive properties of the material is effective over a considerably wider frequency range.

3) Nanohenries (10-9Henries) per turn squared.

4) The minimum inductance is measured in microhenries (10-6 Henries) per 100 turns with the tuning core tuned out of the winding area but still a part of the assembly.

5) The temperature stability is of the magnetic material, measured in parts per million per degree Celsius (ppm/° C) on a toroidal core and winding. This is only an indication of the temperature stability for a complete wound assembly.

B391-w/CF120
CF120
TH23-4( )
C12-50
CN309CT

4 TERMINAL ASSEMBLY
BASE ONLY (6)
WINDING FORM (7)
BASE ASSEMBLY
COLOR CODE
THREADED CORE (8)
CUP CORE
SHIELD CAN
L3901-1-PCT-F-4
B391
CF120
B391-w/CF120
BLUE
TH23-401
C12-5001
CN309CT
L3901-2-PCT-F-4
B391
CF120
B391-w/CF120
RED
TH23-402
C12-5002
CN309CT
L3901-3-PCT-F-4
B391
CF120
B391-w/CF120
GREY
TH23-403
C12-5003
CN309CT
L3901-6-PCT-F-4
B391
CF120
B391-w/CF120
YELLOW
TH23-406
C12-5006
CN309CT
L3901-7-PCT-F-4
B391
CF120
B391-w/CF120
WHITE
TH23-407
C12-5007
CN309CT
L3901-10-PCT-F-4
B391
CF120
B391-w/CF120
BLACK
TH23-410
C12-5010
CN309CT
L3901-17-PCT-F-4
B391
CF120
B391-w/CF120
LAVENDER
TH23-417
C12-5017
CN309CT

6) The base is moulded from thermoset Diallyl Phthatlate (DAP). The 4 terminals available are half hard brass, .025 inches in diameter, tin plated to MIL-STD 202 Method 208 for solderability.

7) The CF120 coil form is a glass reinforced polyester tube with 8-32 internal threads.

8) The tuning core is 8-32 shallow thread coated with Teflon. Tuning-Tool-A is the recommended adjustment tool.


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