TM
WIRE WOUND RESISTORS
CERAMIC ENCASED TYPE
Fire Proof
Ceramic Housing
Alloy Wire Wound Element
On Heat Conducting
Ceramic / Fibre Glass Substrate
SERIES
EUROPEAN STYLE
Power Ceramic Encased Wire Wounds
Quartz Silica
Powder
HEA
Mechanically Crimped
Termination Assembly
2.5 W to 17 W
R 025 to 70 K
PHYSICAL CONFIGURATION
HEA SERIES
d
LM
H
35+3
L
35+3
w
6mm, reduced solderability in this area
HTR
TYPE
POWER
RATING
at 70°C
DIMENSIONS (mm)
L
+1.5
W
+1
H
+1
d
+0.05
LM
+1
RESISTANCE TYPICAL
RANGE
WT.
min
max PER PC
(gms)
C-2A
C-4
C-5B
C-6
C-7A
C-7B
C-9/
C-10A
C-11
C-17
2.5W
4W
5W
6W
7W
7W
9W/
10W
11W
17W
15.0
20.0
25.0
30.0
38.0
25.0
38.0
50.0
75.0
6.0
6.0
6.0
6.0
6.0
9.0
9.0
9.0
9.0
6.0
6.0
6.0
6.0
6.0
9.0
9.0
9.0
9.0
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
35
40
45
50
60
45
60
70
95
R025
R04
R05
R10
R10
R05
R10
R10
R10
6K8
11K
16K
22K
33K
16K
33K
47K
70K
1.6
2.0
2.3
2.8
4.9
4.8
7.3
9.5
13.8
For resistance values less than R10 and tolerance less than +2%
please measure resistance over centered length LM.
TM
WIRE WOUND RESISTORS
CERAMIC ENCASED TYPE
HEA
ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA
Test
Resistance tolerance
Rated ambient temperature
[See derating curve]
Voltage rating
Dielectric withstanding voltage
Insulation resistance
Temperature co-efficient
Performance Requirements
+ 10% [K]; + 5% [J]; +3% [H],
+ 2% [G]; +1% [F]
at 70°C full power dissipation
V= PxR
Max.
DR
+[2% + R05]
> 1000 M [minimum]
+40 to +150 ppm/ °C
[medium and high values]
+400 to +500 ppm/ °C
[low and very low values]
Max.D R +[2% + R05]
Max.D R +[3% + R05]
Max.D R +[3% + R05] Average
-40°C to +155°C
UL specifications have been
met satisfactorily.
DERATING CURVE
Rated dissipation [%]
70°C
120
100
80
40
0
40
80 120 160 200 240 275
Ambient temperature [°C]
Short time overload
Moisture resistance
Load life
Ambient operating
temperature range
Flame test
TYPICAL APPLICATIONS
HEA series enjoy a wide market in audio and TV field.
Apart from these applications and as they are also available in close tolerance, they have increasingly found favour with OEM's in the
industrial field, especially where the following properties are required -
(a) High degree of insulation (b) Low surface temperature.
Depending on resistance value and application the resistors core may be fibreglass or ceramic. These resistors are also available for
use in
pulse applications,
for further information please refer to
"Understanding pulse & over load capability of wire wound
resistors".
In case a tailor-made pulse resistor is required, please refer to
"Questionnaire of data required"
and provide data accordingly.
Note
:
Due to recent technological advances, the ceramic cases used may be steatite ceramic or corderite ceramic or high
alumina ceramic depending on the nature of the application. Hence the ceramic cases may be off-white or variations of
brown and variations of grey; colours which are inherent to these ceramic materials.
ORDERING INFORMATION
HEA
C-4
100R
J
TOLERANCE
RESISTANCE V
ALUE
HTR TYPE
SERIES
Note :
TAPING : Types C-2A, C-4 and C-5B can be supplied in taped form. Please refer
tape/ammo pack specifications
and
tape/reel specifications.
In case pulse type is required, please suffix HTR Type with I eg. C-4I.
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