KTR18
Resistors
Endured high voltage fixed thick film chip resistors
KTR18
(1206 size: 1 / 4W)
Features
1) Power rating of 1 / 4W
2) Limiting element voltage of KTR series is 2.5 times compared with that of MCR series.
3) Highly reliable chip resistor Ruthenium oxide dielectric offers superior resistance to the elements.
4) ROHM resistors have approved ISO鈥?001 certification.
Design and specifications are subject to change without notice. Carefully check the specification sheet before using or
ordering it.
Ratings
Item
Rated power
Conditions
Power must be derated according to the power derating curve in
Figure 1 when ambient temperature exceeds 70
擄
C.
100
80
60
40
20
0
Specifications
0.25W (1 / 4W)
at 70
擄
C
POWER LOAD (%)
鈭?5
0
70
100
155
AMBIENT TEMPERATURE
(擄C)
Fig.1
Rated voltage
The voltage rating is calculated by the following equation.
If the value obtained exceeds the limiting element voltage,
the voltage rating is equal to the maximum operating voltage.
E: Rated voltage (V)
E= P脳R
P: Rated power (W)
R: Nominal resistance (鈩?
Nominal resistance
Operating temperature
See Table 1.
鈭?5
擄
C
to
+155
擄
C
Limiting element voltage
500V
Table 1
Resistance tolerance
F (鹵1%)
J (鹵5%)
Resistance range
(鈩?
Resistance temperature coefficient
(ppm /
擄C)
1
鈮?/div>
R
鈮?/div>
10M (E24)
1
鈮?/div>
R
鈮?/div>
10M (E24)
鹵100
鹵200
Before using components in circuits where they will be exposed to transients such as pulse loads (short鈥揹uration, high鈥搇evel loads), be certain to evaluate the
component in the mounted state. In addition, the reliability and performance of this component cannot be guaranteed if it is used with a steady state voltage that
is greater than its rated voltage.
Rev.B
1/5
1
2
3
4
5
6
