HCW
SERIES
PHYSICAL CONFIGURATION
POWER TYPE
WIRE WOUND RESISTORS
CERAMIC ENCASED TYPE
Ceramic Encased Wire Wound Resistors
Fire Proof
HCW SERIES
W
H
d
+
35 3 L+
35 3
CW-2 2W 17.5 7.5 7.0 0.8 R10 7K5 2.9
CW-3
7W 35.0 9.5 9.5 0.8 R10 30K 8.5
CW-10 10W 48.0 9.5 9.5 0.8 R10 43K 11.5
CW-15 15W at 25 C 48.0 12.5 12.5 1.0 R10 43K 19.8
CW-20 20W at 25 63.0 12.5 12.5 1.0 R10 56K 24.0
3W 22.0 8.0 8.0 0.8 R10 11K 4.4
CW-5 5W 22.0 9.5 9.5 0.8 R10 11K 5.5
CW-7
°
°C
HTR
TYPE POWER
RATING
at 70°C
L
+1.5 H
+1
DIMENSIONS (mm)
d
+0.05
RESISTANCE
RANGE
min max
TYPICAL
WT.
PER PC
(gms)
W
+1
Flame Proof
High Temperature
Ceramic Housing
Alloy Wire wound
Element On
Ceramic Substrate
All Welded Cap &
Lead Assembly
Inorganic
Fire Retardant
Encapsulant
Tin Plated®
Copperweld
Very high degree of insulation
Low temperature on PCB solder joint
2 W to 20 W
R10 to 56K
PULSE TYPE RESISTORS
“Understanding
pulse & over load capability of
wire wound resistors”.
"Questionnaire of data
required"
Resistors for use under pulse
conditions as per IEC - 61000 - 4 - 5
available. For further information
please refer to
In case a tailor-made pulse
resistor is required, please refer
to and provide data
accordingly.
TM
WIRE WOUND RESISTORS
CERAMIC ENCASED TYPE
HCW
TOLERANCE
RESISTANCE VALUE
HTR TYPE
SERIES
HCW 10K KCW-7
ORDERING INFORMATION
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.
TM
ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA
Performance Requirements
Test
Resistance tolerance + 10% [K]; + 5% [J]; +3%[H]; + 2% [G];
+1% [F]
Voltage rating E = PxR
Temperature co-efficient +30 to +90 ppm/ C [Depending on
resistance value]
Short time overload DR = +[2% + R05]
Insulation resistance >1000 Mega - Dry
>100 Mega - Wet
Moisture resistance R = +[5% + R05]
Load life test R = +[5% + R05]
Derating Full power dissipation at 70
°
∆
∆°C to
zero at 270°C (ambient)
100
120
80
40
040 80 120 160 200 240 275
Rated Power [%]
Ambient Temperature [°C]
DERATING CURVE
70°C
