1N5817RL 查看數據表（PDF） - ON Semiconductor
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1N5817RL Datasheet PDF : 7 Pages
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1N5817, 1N5818, 1N5819
NOTE 5. — THERMAL CIRCUIT MODEL
(For heat conduction through the leads)
RqS(A)
RqL(A)
RqJ(A)
RqJ(K) RqL(K) RqS(K)
TA(A)
TL(A)
TC(A)
PD
TJ
TC(K)
TA(K)
TL(K)
Use of the above model permits junction to lead thermal re-
sistance for any mounting configuration to be found. For a
given total lead length, lowest values occur when one side of
the rectifier is brought as close as possible to the heatsink.
Terms in the model signify:
TA = Ambient Temperature TC = Case Temperature
TL = Lead Temperature
TJ = Junction Temperature
RqS = Thermal Resistance, Heatsink to Ambient
RqL = Thermal Resistance, Lead to Heatsink
RqJ = Thermal Resistance, Junction to Case
PD = Power Dissipation
(Subscripts A and K refer to anode and cathode sides, re-
spectively.) Values for thermal resistance components are:
RqL = 100°C/W/in typically and 120°C/W/in maximum
RqJ = 36°C/W typically and 46°C/W maximum.
30
20
10
7.0
5.0
TC = 100°C
20
TL = 70°C
f = 60 Hz
10
7.0
1 Cycle
3.0
2.0
25°C
1.0
0.7
0.5
0.3
0.2
0.1
0.07
0.05
0.03
0.02
0.1
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1
vF, INSTANTANEOUS FORWARD VOLTAGE (VOLTS)
Figure 7. Typical Forward Voltage
5.0
Surge Applied at
Rated Load Conditions
3.0
1.0
2.0 3.0 5.0 7.0 10
20 30
NUMBER OF CYCLES
40 70 100
Figure 8. Maximum Non−Repetitive Surge Current
30
20
TJ = 125°C
15
5.0
100°C
3.0
2.0
75°C
1.0
0.5
0.3
25°C
0.2
0.1
1N5817
0.05
1N5818
1N5819
0.03
0 4.0 8.0 12 16 20 24 28 32 36 40
VR, REVERSE VOLTAGE (VOLTS)
Figure 9. Typical Reverse Current
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