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2002 Sep 26
3
BCcomponents
Product specification
Low ohmic surge resistor
LSR37
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of rated resistance (nominal resistance) are taken from the E12 series with a tolerance of 10% or 20%.The
values of the E12 series are in accordance with “IEC publication 60063”.
The limiting voltage DC is not applicable, because the maximum rated voltage for the maximum Rn-value of 10 kΩ at
Pn = 0.5 W is only 70.7 V.
The maximum permissible hot-spot temperature is 155
°C.
Limiting values
Note
1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60115-1”.
DERATING
The power that the resistor can dissipate depends on the operating temperature; see Fig.1.
TYPE
LIMITING VOLTAGE(1)
(V)
LIMITING POWER
(W)
LSR37
0.5
VP
n
R
×
=
Fig.1
Maximum dissipation (Pmax) in percentage of rated power
as a function of the ambient temperature (Tamb).
70
100
50
0
0
50
100
155
CCB412
−55
Tamb (°C)
Pmax
(%Prated)
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