IRF
Vishay Dale
Inductors
Epoxy Conformal Coated
Uniform Roll Coated
FEATURES
• Flame-retardant coating and color band identification.
• Uniform coating is excellent for automatic insertion.
• Available in bulk, ammo and reel pack per EIA RS-296.
• Superior electrical specifications high Q and self resonant
frequency, low DC resistance, high rated DC current.
ELECTRICAL SPECIFICATIONS
Inductance Tolerance: ± 5%, ± 10%, ± 20%.
DIMENSIONS in inches [millimeters]
Other tolerances available on request.
1.25 [31.75] Min.
1.63 [41.40] Max.
A
Max.
Insulation Resistance: 1000 Megohm minimum per
MIL-STD-202, Method 302, Test Condition B.
Operating Temperature Range: - 55°C to + 105°C.
MATERIAL SPECIFICATIONS
Coating: Epoxy-uniform roll coated.
Lead: Tinned copper.
D
C
Max .
B Max.
MODEL
A (Max.)
B (Max.)
C (Max.)
D
IRF-1
0.260
[6.60]
0.120
[3.05]
0.330
[8.38]
0.0200 ± 0.0015
[0.508 ± 0.038]
Core: Ferrite.
IRF-3
0.385
[9.78]
0.165
[4.19]
0.410
[10.41]
0.025 ± 0.002
[0.635 ± 0.051]
MECHANICAL SPECIFICATIONS
Terminal Strength: 5 pounds pull per MIL-STD-202,
Method 211, Test Condition A.
ENVIRONMENTAL PERFORMANCE
Weight: IRF-1 = 0.3 gram maximum.
TEST
CONDITIONS
SPECIFICATIONS
IRF-3 = 0.6 gram maximum.
Flammability
—
MIL-STD-202,
Method 111
TEST EQUIPMENT*
• H/P 4342A Q-Meter.
Overload
—
MIL-C-15305
Resistance to
Soldering Heat
Test Condition A
MIL-STD-202,
Method 210
• Measurements Corporation Megacycle Meter, Model 59.
• Wheatstone bridge.
Resistance to
Solvents
—
MIL-STD-202,
Method 215
*Test procedures per MIL-C-15305.
STANDARD ELECTRICAL SPECIFICATIONS
TEST
FREQUENCY
L & Q
SELF-
RESONANT*
FREQ. MIN.
(MHz)
DCR
MAXIMUM
(Ohms)
RATED DC**
CURRENT
(mA)
INDUCTANCE
Q
MODEL
(µH)
TOLERANCE
(MHz)
MINIMUM
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
IRF-1
0.10
0.12
0.15
0.18
0.22
0.27
0.33
0.39
0.47
0.56
0.68
0.82
1.0
± 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%
40
40
40
40
40
40
40
40
40
40
40
40
50
50
50
50
50
50
50
50
50
50
50
50
50
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
25.0
7.9
400.0
400.0
400.0
400.0
380.0
360.0
350.0
320.0
300.0
280.0
250.0
200.0
180.0
165.0
150.0
125.0
115.0
100.0
90.0
0.06
0.06
0.07
0.075
0.075
0.08
0.08
0.09
0.10
0.11
0.12
0.12
0.15
0.18
0.20
0.23
0.25
0.28
0.30
0.32
0.35
0.40
0.45
0.55
0.72
1350
1270
1200
1155
1150
1110
1110
1000
1000
950
900
900
815
1.2
740
1.5
7.9
700
1.8
7.9
655
2.2
7.9
630
2.7
7.9
595
3.3
7.9
575
3.9
7.9
80.0
555
4.7
7.9
75.0
530
5.6
7.9
65.0
500
6.8
7.9
60.0
470
8.2
7.9
55.0
425
10.0
7.9
50.0
370
*Measured with full length lead. **Rated DC current based on a temperature rise of 15°C at + 90°C ambient.
Document Number 34055
Revision 02-Nov-01
For technical questions, contact Magnetics@vishay.com
www.vishay.com
31