YC358TJK-074K7L Datasheet, PDF (12/16 Pages) List of Unclassifed Manufacturers – All thick film types of chip resistors have a rectangular ceramic body.

Chip Resistor Surface Mount ^{Thick film technology INTRODUCTION}
Product specification 12
16
DEFINITION OF SYMBOLS (SEE FIGURES 11, 12, 13, 14 AND 15)
Symbol Description
Pˆ
Pˆ_max
Vˆ _i
Vˆ _max
R_nom
t_i
tP
applied peak pulse power
maximum permissible peak pulse power (Fig.12)
applied peak pulse voltage (Fig. 14)
maximum permissible peak pulse voltage (Figs. 11, 13
and 15)
nominal resistance value
pulse duration (rectangular pulses)
pulse repetition time

time constant (exponential pulses)
T_{amb ambient temperature}
T_{m (max.) maximum hot-spot temperature of the resistor}
V
t_p
t_i
V^{^} _i
MGA206
t
Fig. 14 Rectangular pulses
V
YNSC059
V^{^} _max
EXAMPLES
Determine the stability of a typical resistor for
operation under the following pulse-load conditions.
CONTINUOUS PLUS TRAIN
A 100 Xresistor is required to operate under the
following conditions:
V_i = 10 V; t_i = 10^–5 s; t_p = 10^–2 s
Therefore:
Pˆ
10²
 ₁₀₀
 1W
and
t_p
t_i
10^2
 _105
 1,000
For t_i = 10^–5 s and
t_p
t_i
1,000 , Fig. 12 gives
Pˆ_max = 2 W and Fig. 13 gives Vˆ_max = 400 V
As the operating conditions Pˆ = 1 W and Vˆ_i = 10 V
are lower than these limiting values, this resistor
may be safely used.
SINGLE PLUSE
A 10 kXresistor is required to operate under the
following conditions:
Vˆ_i = 250 V; t_i = 10^–5 s
Therefore:
Pˆ_max
250²
 _10,000

6.25
W
The dashed curve of Fig. 12 shows that at t_i = 10^–5 s,
the permissible Pˆ_max = 10 W and Fig. 13 shows a
permissible Vˆ_max of 400 V, so this resistor may be
used.
0.37 V^{^} _max
τ
t
t_p
Fig. 15 Exponential pulses
Mar 25, 2008 V.7
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