S494D
S494D is Fast Soft Recovery Rectifier manufactured by Vishay.
Features
D Hermetically sealed axial- leaded glass envelope
D Glass passivated D Very low reverse current D Soft recovery characteristics
Applications
Switched- mode power supplies High- frequency inverter circuits Electronic ballast
95 10526
Absolute Maximum Ratings
Tj = 25_C Parameter Reverse voltage =Repetitive peak reverse voltage Peak forward surge current Average forward current Junction and storage temperature range Test Conditions Type Symbol Value Unit VR 600 V =VRRM IFSM 30 A IFAV 1.25 A Tj=Tstg
- 65...+175 °C tp=8.3ms, half- sinewave l= 10mm, Tamb=38°C
Maximum Thermal Resistance
Tj = 25_C Parameter Junction ambient Test Conditions lead length l = 10mm, TL = constant Symbol Rth JA Value 60 Unit K/W
Electrical Characteristics
Tj = 25_C Parameter Forward voltage Reverse current Reverse recovery time Test Conditions IF=1A VR=VRRM VR=VRRM, Tj=150°C IF=0.5A, IR=1A, i R=0.25A Type Symbol VF IR IR trr Min Typ Max 1.3 500 150 200 Unit V n A m A ns
Document Number 86058 Rev. 2, 24-Jun-98
.vishay.de
- Fax Back +1-408-970-5600 1 (3)
Vishay Telefunken Characteristics (Tj = 25_C unless otherwise specified)
- Reverse Power Dissipation ( m W ) 100 10 1 Tj = 25°C 0.1 0.01 250 VR = VRRM 200 150 100 50 0 0
- Forward Current ( A )
Tj = 175°C
Rth JA= 60K/W 110K/W 150K/W
0.001 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
- Forward Voltage ( V )
Tj
- Junction Temperature ( °C )
Figure 1. Forward Current vs. Forward Voltage
Figure 3. Max. Reverse Power Dissipation vs. Junction Temperature
1.4 I FAV- Average Forward Current ( A ) 1.2 1.0 0.8 0.6 0.4 0.2 0 0
VR = VR RM half sinewave I R
- Reverse Current ( m A ) 100.0 Rth JA=60K/W l=10mm
VR = VRRM
Rth JA=110K/W PCB: d=10mm 20 40 60 80 100 120 140 160 180
0.1...
