Exceeds environmental standards of MIL-S-19500/228.
•
Ultra fast switching for high efficiency.
Mechanical Data:
Case
Terminals
Polarity
Mounting Position
: Moulded plastic.
: Axial leads, solderable per MIL-STD-202,
Method 208.
: Band denotes cathode.
: Any.
Dimensions : Inches (Millimetres)
Maximum Ratings and Electrical Characteristics:
Ratings at 25°C ambient temperature unless otherwise specified.
Resistive or inductive load, 60Hz.
Parameters
Peak reverse voltage, repetitive; V
RM
Maximum RMS voltage
DC blocking voltage; V
R
Average forward current, I
o
at T
A
= 55°C 3.8”
lead length, 60Hz, resistive or inductive load
Peak forward surge current I
FM
(surge) 8.3m seconds
single half sine-wave superimposed on rated load (JEDEC method)
Maximum forward voltage V
F
at 3.0A, 25°C
Maximum reverse current at rated
reverse voltage
T
J
= 25°C
T
J
= 100°C
75
20.0
50
-55 to +150
75
UF304
400
280
400
3.0
A
150
1.1
10.0
500
50
1.7
V
mA
mA
pF
°C/W
ns
°C
UF308
800
560
800
V
Units
Typical junction capacitance (Note 1) CJ
Typical junction resistance (Note 2) RθJA
Reverse recovery time I
F
= 0.5A, I
R
= 1A, I
rr
= 0.25A
Operating and storage temperature range
Page 1
24/10/05 V1.0
UF304 / UF308
3A Ultra Fast Switching Rectifiers
Notes:
1. Measured at 1MHz and applied reverse voltage of 4.0V dc.
2. Thermal resistance from junction to ambient and from junction to lead length 0.375” (9.5mm) PCB mounted.
Rating and Characteristics Curves
NOTE: 1. Rise Time = 7ns maximum
Input Impedance = 1MΩ, 22pF
2. Rise Time = 10ns maximum
Source Impedance = 50Ω
Set Time
Base For
50ns/cm
Figure 1 - Reverse Recovery Time Characteristics and Test Circuit Diagram
Average Forward Current
(10)-AMP (10)-AAV
IFM, Apk
Ambient Temperature, °C
Figure 3 - Forward Current Derating Curve
Forward Voltage-VFM(Vpk)
Figure 2 - Forward Characteristics
Page 2
24/10/05 V1.0
UF304 / UF308
3A Ultra Fast Switching Rectifiers
Instantaneous Reverse Leakage Current,
Micro Amperes
Peak Forward Surge Current,
Amperes
Number of Cycles at 60Hz
Figure 5 - Peak Forward Surge Current
Percent of Rated Peak Reverse Voltage, %
Figure 4 - Typical Reverse Leakage
Characteristics
Specifications
V
RRM
maximum
(V)
400
800
I
F(av)
(A)
I
FSM
(A)
t
rr
maximum
(ns)
50
75
V
F
(V)
at I
F
= 3.0A
1.1
1.7
Length
Diameter
Part Number
3.0
150
9.5
5.3
UF304
UF308
Dimensions : Millimetres
Page 3
24/10/05 V1.0
UF304 / UF308
3A Ultra Fast Switching Rectifiers
Notes:
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