Series 1944 & 1945
Molded Unshielded RF Coils
MS21389 (reference) – SERIES 1944 PHENOLIC CORE
1944-01M
1944-02M
1944-03M
1944-04M
1944-05M
1944-06M
1944-07M
1944-08M
1944-09M
1944-10M
1944-11M
1944-12M
1944-13M
1944-14M
1944-15K
1944-16K
1944-17K
1945-01K
1945-02K
1945-03K
1945-04K
1945-05K
1945-06K
1945-07K
1945-08K
1945-09K
1945-10K
1945-11K
1945-12K
1945-13J
1945-14J
1945-15J
1945-16J
1945-17J
1945-18J
1945-19J
1945-20J
1945-21J
1945-22J
1945-23J
1945-24J
1945-25J
1945-26J
1945-27J
1945-28J
1945-29J
1945-30J
1945-31J
1945-32J
1945-33J
1945-34J
1945-35J
1945-36J
1945-37J
1945-38J
1945-39J
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
0.10
0.12
0.15
0.18
0.22
0.27
0.33
0.39
0.47
0.56
0.68
0.82
1.00
1.20
1.50
1.80
2.20
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 20%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 10%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
± 5%
25
25
25
25
25
25
25
25
25
25
25
25
25
7.9
7.9
7.9
7.9
50
50
50
50
50
45
40
40
25
25
25
25
20
20
15
15
15
75
75
75
65
65
65
65
60
55
50
50
45
45
45
45
45
45
55
55
60
70
65
65
60
60
65
80
75
75
75
85
80
80
75
75
75
75
65
65
65
65
65
65
65
65
65
65
65
65
60
60
60
60
60
60
60
400
400
400
400
400
376
352
320
288
264
240
220
200
176
160
144
132
88
80
76
72
64
56
52
48
42.4
37.6
34.4
32.0
28.8
25.6
20.8
17.6
15.2
12.8
10.4
8.00
5.76
5.36
5.04
4.72
4.48
4.24
4.00
3.76
3.60
3.44
3.20
3.04
2.88
2.80
2.72
2.64
2.48
2.40
2.24
0.020
0.025
0.030
0.030
0.030
0.040
0.045
0.070
0.070
0.100
0.120
0.160
0.230
0.280
0.380
0.540
0.750
0.11
0.14
0.19
0.28
0.34
0.43
0.56
0.67
0.81
1.15
1.40
1.60
2.30
3.30
3.32
3.70
3.99
4.48
5.07
5.78
5.00
5.80
6.60
7.40
8.00
8.60
8.90
9.60
9.90
10.4
10.9
11.6
11.8
12.5
13.5
14.0
15.0
15.5
16.5
4000
3500
3000
3000
3000
2700
2500
2000
2000
1700
1500
1300
1100
1000
850
720
610
1600
1400
1200
1000
900
800
720
650
590
500
460
430
360
300
290
275
265
250
235
220
170
164
158
155
150
145
142
137
135
131
128
124
123
120
115
113
110
107
104
MS21390 (reference) – SERIES 1945 IRON CORE
1
2.70
2
3.30
3
3.90
4
4.70
5
5.60
6
6.80
7
8.20
8
10.0
9
12.0
10
15.0
11
18.0
12
22.0
13
27.0
14
33.0
15
39.0
16
47.0
17
56.0
18
68.0
19
82.0
20 100
21 120
22 150
23 180
24 220
25 270
26 300
27 330
28 360
29 390
30 430
31 470
32 510
33 560
34 620
35 680
36 750
37 820
38 910
39 1000
7.9 10
7.9 10
7.9 10
7.9
7.9
7.9
7.9
7.9
7.9
7.9
7.9
7.9
5.0
2.5
5.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1.5
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
0.79 0.79
Test Methods
MIL-PRF-15305 test methods, only.
MS21389-01 to MS21389-17, reference - 1944
Series
MS21390-01 to MS21390-39, reference - 1945
Series
Physical Parameters
Inches
Length
0.420 to 0.447
Diameter
0.168 to 0.193
Lead Size
AWG #22 TCW 0.023 to 0.027
Lead Length
1.30 Min.
Millimeters
10.67 to 11.35
4.27 to 4.90
0.584 to 0.686
33.02 Min.
Current Rating at 90°C Ambient
35°C Rise
Operating Temperature
–55°C to +125°C
Maximum Power Dissipation at 90°C
Series 1944: 0.385 W
Series 1945: 0.330 W
Marking
Parts are printed with DELEVAN,
Inductance Value/Tolerance, and Lot/Date Code.
Optional color banding is available; when required,
suffix Part Number with the letter “B”.
Packaging
Tape & reel: 12" reel, 2500 pieces max.;
14" reel, 3000 pieces max. For additional packaging
options, see page 114.
Made in the U.S.A.
Optional Tolerances:
www
.
delevan
.
com
E-mail: apisales@delevan.com
2/ 2000
270 Quaker Rd., East Aurora NY 14052 • Phone 716-652-3600 • Fax 716-652-4814
NU
MB
ER
MI
L
DA
SH
IN
#(
DU
CT Ref.
)
AN
CE
TO
(µ
LE
H)
RA
N
IN
DU CE
FR CT
EQ AN
UE CE
Q-
NC T
TE
E
ST Y (M ST
H
FR
Q
EQ z)
MI
UE
NI
MU
NC
SR
M
Y
F
(M
MI
Hz
NI
)
MU
DC
M
(M
MA RES
Hz
XI IST
)
MU A
CU
NC
R M
MA RE (OH E
XI NT MS
MU R
)
M ATI
(m NG
A)
PA
RT
RF INDUCTORS
J = 5%
H = 3%
G = 2%
F = 1%
PAGE
43
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