TM
WIRE WOUND RESISTORS
CERAMIC ENCASED TYPE
Flame Proof
High Temperature
Ceramic Housing
Inorganic
Fire Retardant
Encapsulant
HCA/HCV
SERIES
POWER TYPE
Ceramic Encased Wire Wound Resistors
Fire Proof
Mechanically Crimped
Termination Assembly
Alloy Wire Wound
Element On
Fibre Glass/Ceramic
Substrate
Very high degree of insulation
Low surface temperature
1 W to 20 W
R10 to 56K
PHYSICAL CONFIGURATION
HCA SERIES
LM
d
H
35+3
L
35+3
W
HTR
TYPE
POWER
RATING
at 70°C
1W
1W
2W
3W
5W
7W
10W
15W
(25
0
C)
20W
(25
0
C)
DIMENSIONS (mm)
L
+1.5
W
+1
RESISTANCE TYPICAL
RANGE
WT.
max PER PC
d
LM
min
H
(gms)
+1 +0.05 +1
0.8
0.8
0.8
0.8
0.8
0.8
0.8
1.0
1.0
35
35
40
45
45
55
70
70
85
R05
R05
R05
R05
R05
R05
R05
R05
R10
2K7
4K7
7K5
11K
11K
30K
43K
43K
56K
1.4
1.9
2.5
3.8
5.1
7.8
10.8
17.8
22.0
For resistance values less than
R10 and tolerance less than +2%
please measure resistance over
centered length LM.
!
Pulse type resistors are
available in this series by
substituting the resistance
element and the substrate from
fibre glass to ceramic.
C-1A
C-1
C-2
C-3
C-5
C-7
C-10
C-15
C-20
13.0 5.5 5.5
15.0 7.5 6.5
17.5 7.5 7.0
22.0 8.0 8.0
22.0 9.5 9.5
35.0 9.5 9.5
48.0 9.5 9.5
48.0 12.5 12.5
63.5 12.5 12.5
!
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.
TM
WIRE WOUND RESISTORS
CERAMIC ENCASED TYPE
HCA/HCV
PHYSICAL CONFIGURATION
L
1
L
3
H
1
H
3
H
2
0.5
W
1
W
2
d
W
3
L
4
HCV SERIES
HTR
POWER
TYPE
RATING
AT 70°C
CV-7
CV-10
CV-15
CV-20
7
10
DIMENSIONS (mm)
L
1
L
3
L
4
H
1
H
2
H
3
9.5+1
9.5+1
W
1
W
2
RESISTANCE
RANGE
W
3
d+0.1 min
R10
R10
R10
R10
max
30K
43K
43K
56K
TYPICAL
WT
PER PC
(gms)
10.0
13.3
22.1
26.4
60+1.5 5+0.5
67+1.5 5+0.5
7+1 2.1+0.15 11+1
7+1 2.1+0.15 11+1
10+1 2.1+0.15 10+1 0.8
10+1 2.1+0.15 10+1 0.8
15
62.5+2 4.5+0.2 6.5+1 2.5+0.15 14+1 12.5+1.2 13+1.2 2.5+0.15 13+1 1.0
(25°C)
20
(25°C)
78+2 4.5+0.2 6.5+1 2.5+0.15 14+1 12.5+1.2 13+1.2 2.5+0.15 13+1 1.0
In order to facilitate vertical mounting of the large 7W to 20W resistors in HCA series on heavily
populated PCB's they can be supplied on request with mounting brackets as shown in HCV series.
ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA
Test
Resistance tolerance
Rated ambient temperature
[See derating curve]
Dielectric withstanding
voltage
Insulation resistance
Temperature co-efficient
Performance Requirements
+ 10% [K]; + 5% [J]; +3% [H]; +2% [G
+ 1% [F]
upto 10W, full power dissipation at 70°C
15W/20W full power dissipation at 25°C
Max
DR
+[2% + R05]
> 1000 M [minimum]
+100 ppm/ °C [> 10R]
+80 ppm/ °C [< 10R]
+450 ppm/ °C [< 1R0]
Max
DR
+[2% + R05]
Max
DR
+[3% + R05]
Max
DR
<[5% + R05]
-40°C to +155°C
Specifications laid down by UL
have been met satisfactorily.
DERATING CURVE
Rated dissipation [%]
25°C 70°C
120
100
80
40
0
40 80 120 160 200 240 275
Ambient Temperature [°C] Max 155°C
15W/20W
Up to 10W
Short time overload
Moisture resistance
Load life
Ambient operating
temperature range
Flame test
TM
WIRE WOUND RESISTORS
CERAMIC ENCASED TYPE
HCA/HCV
TYPICAL APPLICATIONS
HCA/HCV series resistors are almost universally used in the far east for almost all audio, TV and Industrial
Equipment applications. This series enjoys the following distinct advantages over normal coated resistors :
1) As the resistive element is hermetically sealed in a ceramic case using a cement which enjoys flame
retardant properties even at high
overload no damage can be caused to neighbouring components.
2) Due to very high degree of insulation and low surface temperature, these resistors can be mounted with
their bodies relatively closer
to the PCB.
3) These resistors are also commonly referred to in the far east as cement resistors owing to the nature of
their construction.
4) In certain markets these resistors are also wrongly called fusible resistors.
5) The Impulse type variant in this series is widely used for pulse and surge applications.
ORDERING INFORMATION
HCA [HCV]
C-7 [CV-7]
100R
J
TOLERANCE
RESISTANCE VALUE
HTR TYPE
SERIES
Note :
1) In case Pulse type is required please suffix HTR type with I eg. C-5I.
2) 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.
3) Types C-10, C-15 and C-20 may have cases with bottom bumps as per international practice.
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