Ultra-Precision Resistor
(Hermetically Sealed)
TCR, Resistance Range, Tolerance, Rated Power
HC
HD
HG
TCR (ppm/°C) Resistance
Type -55°C to +125°C
Range( )
1 to 5
0±15 (W)
5 to 30
0±5 (X)
HC
HD
0±5 (X)
0±2.5 (Y)
30 to 120k
0±1 (Z)**
1 to 10
HG
0±2.5 (Y)
0±1 (Z)**
10 to 10k
Resistance Tolerance (%)*
±0.5 (D) ±1 (F)
±0.1 (B) ±0.5 (D) ±1 (F)
±0.005 (V) ±0.01 (T)
±0.02 (Q) ±0.05 (A)
±0.1 (B) ±0.5 (D) ±1 (F)
±0.01 (T) ±0.02 (Q) ±0.05 (A)
±0.1 (B) ±0.5 (D) ±1 (F)
±0.005 (V) ±0.01 (T)
±0.02 (Q) ±0.05 (A)
±0.1 (B) ±0.5 (D) ±1 (F)
0.3
0.3
Rated Power (W)
at 125°C
Composition of Type Number
Symbols in parentheses are for type number composition.
*Resistance figures are obtained by measuring the leads at point 12.7±3.2mm away from the base for type HC
and HD, but, in case of resistance below 10 ohm, the value at 1.6±0.6mm away from the base for all types.
**Temperature characteristic Z is applicable for temperature range between 0°C and 60°C.
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RCT
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Rated Power Percentage
Resistance value, in ohm, is expressed by a series of six characters, five of
which represent significant digits. The sixth R or K is a dual-purpose letter that
designates both the value range (R for ohmic; K for kilo-ohm) and the location
of decimal point.
Configuration
HC, HD Type
T
L
3.81±0.25
5.08±0.25
30±10
0.65±0.05
0.8±0.05
d
d
1
Dimensions in mm
28
V
4r
3r
V
10.7±0.3
10.7±0.3
4.3±0.3
12.8±0.3
8.8±0.3
2.54±0.25
5.08±0.25
I
I
Type
L
W
T
F
F
1
HC
HD
HG
19.0±0.3
2r
i
1r
i
d
T
1
d
L
d
L
F
1
F
d
1
d
d
:elpmaxE
F
Power Derating Curve
(%)
250
200
150
100
50
70
25
HG Type
50
75
100
125
Ambient Temperature
150 (°C)
Four-Terminal (Kelvin) Connection
W
W
For low ohmic resistor (less than 10 ohm), the resistance value and TCR of the
copper lead increases overall resistance value. Four-terminal (Kelvin) connection
is recommended per the following figure. Loading current at voltage and current
terminals (V, I) causes measurement error.
Four-Terminal Resistor
Performance
Parameters
Maximum Rated Operating Temperature
Working Temperature Range
Maximum Working Voltage
Power Conditioning
Thermal Shock
Overload
Solderability
Resistance to Solvents
Low Temperature Storage
Low Temperature Operation
Terminal Strength
Dielectric Withstanding Voltage
Insulation Resistance
Resistance to Soldering Heat
Moisture Resistance
Shock (Specified Pulse)
Vibration, High Frequency
Life
70°C Power Rating
Storage Life
High Temperature Exposure
Current Noise
Voltage Coefficient
Thermal EMF
125°C, Rated Power, 100 hrs.
-65°C/30 min.
+150°C/30 min., 5 cycles
Rated Power x 6.25, 5 sec.
Steam Aging 8 hrs., 245°C, 5 sec.
1 lsopropyl Alcohol + Mineral Spirits
2 Water + Butyl Cellosolve + Monoethanolamine
-65°C, 24 hrs.
-65°C, Rated Voltage, 45 min.
0.908kg (2 pounds), 10 sec.
Atmospheric: 300V rms. Barometric: 200V rms.
DC 100V, 2 min.
+260°C, 10 sec. ±2 sec.
+65°C to -10°C, 90% RH to 98% RH, Rated Voltage, 10 cycles (240 hrs.)
100G, 6ms., Sawtooth Wave, X, Y, each 10 shocks
20G, 10Hz to 2,000Hz to 10Hz, 20 min., X, Y, each 4 hrs.
125°C, Rated Voltage, 1.5 hrs. – ON, 0.5 hr. – OFF, 2,000 hrs.
70°C, Rated Voltage x 2, 1.5 hrs. – ON, 0.5 hr. – OFF, 2,000 hrs.
15°C to 35°C, 15% RH to 75% RH, No Load, 10,000 hrs.
150°C, No Load, 2,000 hrs.
Test Condition
MIL-PRF-55182/9 Specification
ALPHA Typical Test Data
125°C
-65°C to +150°C
300V
±(0.20%+0.01 )
±0.05%
±0.05%
over 95% coverage
no damage
±0.05%
±0.05%
±0.02%
±0.02%
over 10,000M
±0.02%
±0.05%
±0.01%
±0.02%
±0.05%
±0.05%
±0.005 %
±0.5 %
-32dB
0.0001%/V
1.0 V/°C
±0.0025%
±0.0025%
±0.0025%
over 95% coverage
no damage
±0.0025%
±0.0025%
±0.001%
±0.0025%
over 10,000M
±0.0025%
±0.0025%
±0.0025%
±0.0025%
±0.01%
±0.01%
±0.0005 %
±0.01 %
-42dB
0.00003%/V
0.1 V/°C
Frequency Characteristics
Temperature of Resistor Surface
HC
Precaution in Using HC, HD or HG Resistors
When soldering to mount HC, HD or HG on a board, keep the resistor over 10mm away
from the board surface by using an insulating tube.
Wm/C¡70.0 =
Wm/C¡51.0 =
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HG
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