HT
Series
High Performance
RFI Power Line Filters
for Medical Equipment
HT7
UL Recognized
CSA Certified
VDE Approved
HT Series
HT series power line filters provide superior common-
mode and premium differential-mode attenuation to RFI
noise on the frequency range from 10kHz to 30MHz, for
IEC601 and UL544 patient-connected equipment, as well
as all other electronic equipment that cannot tolerate any
leakage current.
They are a size- and cost-effective solution to the
problem of meeting both medical leakage current limits
and conducted emissions limits in equipment with high
noise sources (such as switching power supplies). HT
series filters can ensure compliance to the following
Conducted Emissions standards:
• German FTZ Decree #243/1991, Quasi-peak and
Averaging limits.
• European Normalized Standards based on EN55022,
Level A (in many cases, Level B also).
• FCC Part 15, Computing Devices, Class B.
• FCC Part 18, ISMEquipment, Industrial and
Consumer.
They also provide premium susceptibility protection to
medical equipment, permitting error-free operation in
noisy environments and enabling compliance to IEC801-6
and the FDA guidelines.
HT6
HT1
HT3
Specifications
Maximum leakage current, each
line-to-ground
@ 120 VAC 60 Hz:
@ 250 VAC 50 Hz:
Hipot rating (one minute):
line-to-ground
line-to-line
Operating frequency:
Rated voltage:
Rated current:
6EHT
10EHT
15EHT
@120 VAC
6A
10A
15A
2µA
5µA
1500 VAC
1450 VDC
50/60 Hz
120/250 VAC
@ 250 VAC
5A
8A
12A
Minimum
insertion loss in dB:
Line-to-ground in 50 ohm circuit
Current
Frequency MHz
Rating .01 .02 .05 .08 .15 .5
1
2
6A
10A
15A
5 10 20 30
6
8
5
2
8
2
16 23 32 41 46 41 33 26 15 9
9 15 24 30 36 42 34 22 11 12
4 9 18 22 27 41 34 22 12 15
Electrical Schematics
6 Amp
Line-to-line in 50 ohm circuit
Current
Frequency MHz
Rating .01 .02 .05 .08 .15 .5 .1
2
6A
10A
15A
5 10 20 30
4 1 14 45 51 70 70 65 55 47 37 37
7 8 17 32 52 70 70 70 65 55 40 35
12 16 15 10 51 70 70 70 70 70 65 55
10 Amp
HT
50
15 Amp
Recommended Panel Cutout
(HT7 & HT7M)
Panel Cutout (Back Mount)
Line Cord
Resistor location for reference only.
Line Cord No. GA400
7 1/2 foot, 3-conductor line cord to mate
with
T7 models
Libertyville, IL (847) 680-7400
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