TOROIDAL INDUCTORS
 VMPT-XX
Vertical Mount
Power Toroidal Inductors
- Stable powdered iron cores
- Low external magnetic field
- Low DCR
- High core saturation current
- Operation -55 to +125°C
DESIGN NOTES
Toroidal inductors described in this brochure are manufactured of the highest quality raw materials utilizing powdered iron core material; they are provided as rectangular vertical standing units to realize maximum inductance per unit volume while requiring minimum mounting space.
These toroidal inductors are designed to provide the utmost in versatility for power applications in computers, filters, instruments, missiles, aircraft, business machines, communications equipment and similar type applications. They are designed for printed circuit board applications and incorporate standoff feet on the toroid carrier to allow solder fillet formation and flush cleaning of solder-flux residue from under the component after the soldering operation.
These inductors are designed and manufactured to obtain a wide selection of inductance values in the smallest possible package sizes. Copper leads are attached and the toroid is secured to the housing with epoxy resin. Leads are tin-plated per MIL-P-81728, semi-bright. Carrier material is a liquid crystal polymer, (LCP) plastic. LCP can be used continuously at 280°C (536°F), has a melt point of 335°C (635°F), and is inherently flame retardant and meets the flammability requirements of UL 94V-0.
These toroidal
inductors are designed to meet the applicable portions of
Specification MIL-PRF-15305, Grade I, Class B; they are
designed for -55 to +125°C operation. Inductors are
capable of withstanding 500 V DC @ 50 microamps applied
between inductor to case.
Standard inductance
tolerance is ±10%; however, units can be supplied
to closer tolerances on special order. All measurements
of inductance are obtained at frequencies as specified in
Specification MIL-PRF-15305. Standard inductance values
are shown in the following table. Since inductance varies
with AC/DC current values, each end application should be
evaluated to ensure proper specification of inductance value.
To assist in selecting optimal inductance during prototyping
and breadboarding, toroid inductor kits are available. Inductance
is measured on HP 4262A and 4284A/42841A LCR Meters.
Marking consists
of manufacturer's logo (EC²), part number, terminal
identification and date code of manufacture. All marking
is applied by silk-screen process using blue epoxy paint
in accordance with MIL-STD-130, to meet the permanency of
identification required by MIL-STD-202, Method 215.
PART NUMBER TABLE
PART
NUMBER |
*L
(uH) |
W |
L |
H |
A |
B |
DCR
(ohms) |
RATED
Idc
(Amps) |
Idc for
10% drop
in L
(Amps) |
Idc for
20% drop
in L
(Amps) |
Idc for
30% drop
in L
(Amps) |
| VMPT-1.8 |
1.8 |
.150 |
0.275 |
0.250 |
N/A |
0.15 |
.02 |
1.9 |
0.84 |
1.39 |
1.94 |
| VMPT-2.2 |
2.2 |
.150 |
0.275 |
0.250 |
N/A |
0.15 |
.02 |
1.8 |
0.76 |
1.26 |
1.75 |
| VMPT-2.7 |
2.7 |
.200 |
0.325 |
0.350 |
.10 |
0.2 |
.03 |
2.4 |
1.43 |
2.39 |
3.32 |
| VMPT-3.3 |
3.3 |
.200 |
0.325 |
0.350 |
.10 |
0.2 |
.03 |
2.3 |
1.30 |
2.16 |
3.00 |
| VMPT-3.9 |
3.9 |
.200 |
0.325 |
0.350 |
.10 |
0.2 |
.03 |
2.2 |
1.19 |
1.99 |
2.76 |
| VMPT-4.7 |
4.7 |
.200 |
0.325 |
0.350 |
.10 |
0.2 |
.04 |
2.1 |
1.09 |
1.81 |
2.52 |
| VMPT-5.6 |
5.6 |
.200 |
0.325 |
0.350 |
.10 |
0.2 |
.04 |
2.0 |
0.99 |
1.66 |
2.31 |
| VMPT-6.8 |
6.8 |
.200 |
0.325 |
0.350 |
.10 |
0.2 |
.04 |
1.9 |
0.90 |
1.50 |
2.09 |
| VMPT-8.2 |
8.2 |
.200 |
0.325 |
0.350 |
.10 |
0.2 |
.05 |
1.8 |
0.82 |
1.37 |
1.91 |
| VMPT-10 |
10 |
.200 |
0.325 |
0.350 |
.10 |
0.2 |
.05 |
1.7 |
0.74 |
1.24 |
1.73 |
| VMPT-12 |
12 |
.250 |
0.425 |
0.425 |
.15 |
0.3 |
.06 |
2.0 |
0.97 |
1.62 |
2.26 |
| VMPT-15 |
15 |
.250 |
0.425 |
0.425 |
.15 |
0.3 |
.07 |
1.9 |
0.87 |
1.45 |
2.02 |
| VMPT-18 |
18 |
.250 |
0.425 |
0.425 |
.15 |
0.3 |
.07 |
1.8 |
0.8 |
1.33 |
1.84 |
| VMPT-22 |
22 |
.250 |
0.425 |
0.500 |
.15 |
0.3 |
.06 |
2.3 |
0.83 |
1.39 |
1.93 |
| VMPT-27 |
27 |
.250 |
0.425 |
0.525 |
.15 |
0.3 |
.06 |
2.2 |
0.75 |
1.25 |
1.74 |
| VMPT-33 |
33 |
.275 |
0.425 |
0.575 |
.15 |
0.5 |
.08 |
2.4 |
0.90 |
1.50 |
2.09 |
| VMPT-39 |
39 |
.275 |
0.425 |
0.600 |
.15 |
0.5 |
.08 |
2.3 |
0.83 |
1.38 |
1.92 |
| VMPT-47 |
47 |
.275 |
0.425 |
0.600 |
.15 |
0.5 |
.09 |
2.2 |
0.75 |
1.26 |
1.75 |
| VMPT-56 |
56 |
.275 |
0.600 |
0.625 |
.15 |
0.5 |
.11 |
2.3 |
0.78 |
1.29 |
1.80 |
| VMPT-68 |
68 |
.275 |
0.600 |
0.625 |
.15 |
0.5 |
.12 |
2.1 |
0.70 |
1.17 |
1.63 |
| VMPT-82 |
82 |
.275 |
0.600 |
0.650 |
.15 |
0.5 |
.14 |
2.0 |
0.64 |
1.07 |
1.49 |
| VMPT-100 |
100 |
.275 |
0.600 |
0.675 |
.15 |
0.5 |
.15 |
1.9 |
0.58 |
0.97 |
1.35 |
| VMPT-120 |
120 |
.350 |
0.650 |
0.725 |
.20 |
0.5 |
.17 |
2.2 |
0.77 |
1.28 |
1.77 |
| VMPT-150 |
150 |
.350 |
0.650 |
0.750 |
.20 |
0.5 |
.19 |
2.1 |
0.68 |
1.14 |
1.59 |
| VMPT-180 |
180 |
.350 |
0.650 |
0.750 |
.20 |
0.5 |
.20 |
2.0 |
0.63 |
1.04 |
1.45 |
| VMPT-220 |
220 |
.400 |
0.750 |
0.950 |
.20 |
0.6 |
.17 |
2.8 |
0.75 |
1.24 |
1.73 |
| VMPT-270 |
270 |
.400 |
0.750 |
0.975 |
.20 |
0.6 |
.18 |
2.7 |
0.67 |
1.12 |
1.56 |
| VMPT-330 |
330 |
.400 |
0.750 |
0.975 |
.20 |
0.6 |
.20 |
2.5 |
0.61 |
1.01 |
1.41 |
| VMPT-390 |
390 |
.550 |
0.900 |
1.175 |
.40 |
0.8 |
.15 |
3.6 |
0.78 |
1.29 |
1.80 |
| VMPT-470 |
470 |
.550 |
0.900 |
1.175 |
.40 |
0.8 |
.16 |
3.4 |
0.71 |
1.18 |
1.64 |
| VMPT-560 |
560 |
.600 |
1.000 |
1.300 |
.40 |
0.8 |
.19 |
3.7 |
0.84 |
1.40 |
1.94 |
| VMPT-680 |
680 |
.600 |
1.000 |
1.300 |
.40 |
0.8 |
.21 |
3.5 |
0.76 |
1.27 |
1.76 |
| VMPT-820 |
820 |
.700 |
1.200 |
1.600 |
.50 |
1.0 |
.16 |
4.7 |
0.83 |
1.38 |
1.91 |
| VMPT-1000 |
1000 |
.700 |
1.200 |
1.600 |
.50 |
1.0 |
.18 |
4.4 |
0.75 |
1.25 |
1.73 |
| VMPT-1200 |
1200 |
.725 |
1.400 |
1.750 |
.50 |
1.2 |
.20 |
4.7 |
0.84 |
1.40 |
1.95 |
| VMPT-1500 |
1500 |
.725 |
1.400 |
1.775 |
.50 |
1.2 |
.22 |
4.5 |
0.75 |
1.25 |
1.74 |
| VMPT-1800 |
1800 |
.725 |
1.400 |
1.800 |
.50 |
1.2 |
.25 |
4.3 |
0.69 |
1.14 |
1.59 |
*Nominal L for 0 Idc
ÆRated Idc for a 40°C temperature rise
|
