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
Rated Power (W)
at 125°C
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)
0.3
±0.01 (T) ±0.02 (Q) ±0.05 (A)
±0.1 (B) ±0.5 (D) ±1 (F)
0.3
±0.005 (V) ±0.01 (T)
±0.02 (Q) ±0.05 (A)
±0.1 (B) ±0.5 (D) ±1 (F)
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.
Composition of Type Number
:elpmaxE
Power Derating Curve
epyT
RCT
eulaV ecnatsiseR
ecnareloT
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
(%)
250
Rated Power Percentage
HC Y 30K000 T
200
150
100
50
70
25
HG Type
150 (°C)
T
HC, HD Type
50
75
100
125
Ambient Temperature
L
T
L
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.
d
F
1d
1F
F
i
1r
28
V
Dimensions in mm
3r
30±10
0.65±0.05
0.8±0.05
4r
5.08±0.25
12.8±0.3
8.8±0.3
2.54±0.25
5.08±0.25
I
3.81±0.25
HG
19.0±0.3
I
HD
10.7±0.3
10.7±0.3
4.3±0.3
V
d
d
d1
HC
i
d
d
Type
L
W
T
F
F1
2r
1d
L
Four-Terminal Resistor
