HIR
SERIES
Silicone Coated Wire Wound Resistors
Industrial / Professional Applications
WIRE WOUND RESISTORS
SILICONE COATED TYPE
APPLICABLE STANDARDS
PHYSICAL CONFIGURATION
HI POWER
JSS - 50402 (Pattern RFHT -2), IS - 8909 (Type FRP4)
IEC - Pub 266 and Pub 266A [Type - 2E]
MIL - R 26, Char V or Char U
(depending on resistance tolerance)
HTR
TYPE POWER
RATING
at 70°C L
+3 d
+1
DIMENSIONS (mm)
W
+0.35
RESISTANCE
RANGE
min max
R-10A 10W 27.0 15.0 7.7 4.75 1.4 6.35 101/301 R25 1K0
R-10B 10W 27.0 15.0 7.7 5.0 3.0 7.0 101/301 1K0
R-15A 15W 40.0 15.0 7.7 4.75 1.4 6.35 101/301 1R0 3K0
R-15B 15W 40.0 15.0 7.7 5.0 3.0 7.0 101/301 1R0 3K0
R-20A 20W 60.0 15.0 7.7 1.4 6.35 1R6 5K0
R-20B 20W 60.0 15.0 7.7 5.0 3.0 7.0 1R6 5K0
R-25A 25W 75.0 15.0 7.7 1.4 6.35 2R0 10K
R-25B 25W 75.0 15.0 7.7 5.0 3.0 7.0 2R0 10K
R-40A 40W 75.0 26.0 14.3 1.4 6.35 102/303 3R9 15K
R-40B 40W 75.0 26.0 14.3 5.0 3.0 7.0 3R9 15K
R-50A 50W 100.0 26.0 14.3 1.4 6.35 5R5 20K
R-50B 50W 100.0 26.0 14.3 5.0 3.0 7.0 5R5 20K
R-60A 60W 115.0 26.0 14.3 6.35 1.65 7.0 6R1 25K
R-60B 60W 115.0 26.0 14.3 8.0 4.3 8.0 6R1 25K
R25
4.75 101/301
101/301
4.75 101/301
101/301
4.75 102/303
4.75 102/303
102/303
102/303
102/303
MOUNTING
HARDWARE
AVAILABLE
φ Id
+0.3 H
[min]
D
+2
Nickel - Plated
Terminations
Flame Retardant
Silicone Coating
D-Dimensions given are indicative and could exceed tolerances given depending on resistance value being wound.
Alloy Resistance Wire, wound
On Ceramic Substrate
Highly stable
10 W to 400 Watts
R 25 to 100 K
Useful for inexpensively dissipating large amounts of power
in DC or low frequency AC circuits.
D
d
L
W
φId
H
TM
WIRE WOUND RESISTORS
SILICONE COATED TYPE
HIR
PHYSICAL CONFIGURATION
HORIZONTAL THRU-BOLT
Z
C
1.3mm (max) HB
Y
L
W
φId
D
d
H
MOUNTING SPECIFICATIONS
R-80A 80W 130.0 26.0 14.3 6.35 1.65 102/303 6R8 35K
R-80B 80W 130.0 26.0 14.3 8.0 4.3 8.0 35K
R-100A 100W 150.0 33.2 19.1 6.35 11R 40K
R-100B 100W 150.0 19.1 8.0 11R 40K
R-120A 120W 165.0 12R 47K
R-120B 120W 165.0 12R 47K
R-140A 140W 200.0 15R 56K
R-140B 140W 200.0 15R 56K
R-200A 200W 250.0 33.2 20R 68K
R-200B 200W 250.0 33.2 20R 68K
R-300A 300W 250.0 24.0 104/304 26R 75K
R-300B 300W 250.0 26R 75K
R-400A 400W 330.0 45.0 6.35 1.65 7.0 36R 100K
R-400B 400W 330.0 45.0 8.0 4.3 8.0 36R 100K
7.0 102/303 6R8
1.65 7.0 103/303
33.2 4.3 8.0 103/303
33.2 19.1 6.35 1.65 7.0 103/303
33.2 19.1 8.0 4.3 8.0 103/303
33.2 19.1 6.35 1.65 7.0 103/303
33.2 19.1 8.0 4.3 8.0 103/303
19.1 6.35 1.65 7.0 103/303
19.1 8.0 4.3 8.0 103/303
45.0 6.35 1.65 7.0
45.0 24.0 8.0 4.3 8.0 104/304
24.0 104/304
24.0 104/304
HTR
TYPE POWER
RATING
at 70°C L
+3 d
+1
DIMENSIONS (mm)
W
+0.35
RESISTANCE
RANGE
min max
MOUNTING
HARDWARE
AVAILABLE
φ Id
+0.3 H
[min]
D
+2
101 12.2 21.83 25.4 5.5 x 8.5 19.05 34.92
102 19.5 24.50 32.75 5.5 x 11.11 19.50 45.5
103 31.5 30.0 35.0 7.1 x 11.11 22.22 53.98
104 48.0 31.5 56.88 7.1 x 11.11 23.22 82.0
D-Dimensions given are indicative and could exceed tolerances given depending on resistance value being wound.
Resistor types suffixed with ‘A’ are compatible with Amp F 187 connectors or Amp 250 connectors.
*
NUT
LOCKWASHER
SCREW
VERTICAL THRU-BOLT
CERAMIC CENTERING
WASHER
Core Length (L)
Plus ‘X’
9.2mm (min)
X (APPROXIMATE)
(mm)
BRACKET
TYPE
BRACKET
TYPE Y
+1.0mm Z
+2mm H
+2mm
MOUNTING
SLOT
+1.0mm C
+2mm B
+2mm
301 11.5
303 15.0
304 16.0
TM
WIRE WOUND RESISTORS
SILICONE COATED TYPE
HIR
TM
(1) Grid resistor (2) Voltage dropping resistor (3) Bias supply resistor (4) High voltage bleeder resistor in power
supplies (5) Voltage divider networks (6) Filament dropping resistor (7) Load resistor (8) Shunt resistor.
Note : In case non-inductive type is required, please pre-fix HTR type with 'N' e.g. NR-20A
The Words - “Applicable Standards” do not necessarily signify certification to that standard, however the
tests mentioned are carried out on the broad based guidelines set out in these standards.
TYPE OF MOUNTING
HARDWARE
TOLERANCE
RESISTANCE VALUE
HTR TYPE
SERIES
HIR R20A 10R J 101 or 301
TYPICAL APPLICATIONS
ORDERING INFORMATION
ELECTRICAL AND ENVIRONMENTAL CHARACTERISTICS / DATA
Notes : 1) Resistance values below and above the shown resistance range are possible on request.
2) Non-inductive types in this series are possible.
3) Dimensions given are to be used as a guide only, they can be varied to a certain extent due to
technical reasons. For example, larger terminals may be used for very low values.
0
Ambient temperature [°C]
40
Rated dissipation [%]
DERATING CURVE
100
25 70 175 225 275 350
Char V
Char U
Performance Requirements
Test
Resistance tolerance + 10% [K]; + 5% [J], +2%[G], +1%[F]
Rated ambient temperature at 70°C full power dissipation
[ see derating curve]
Di-electric withstanding Max ∆R+[1%+R05]
voltage
Insulation resistance >1000 M
Temperature co-efficient + 100 ppm/ °C
[For low values TCR will be higher]
Short time overload Max ∆R+[ 2%+R05]
Moisture resistance Max ∆R+ [5%+R05]
Load life Max ∆R+ [<5%+R05]
