MAXIMUM RATINGS & ELECTRICAL CHARACTERISTICS
MECHANICAL DATA
FEATURES
Data Sheet No. SESA-401-1C
MECHANICAL SPECIFICATION
Case: JEDEC DO-27 molded plastic (U/L Flammability Rating 94V-0)
Terminals: Plated axial leads
Solderability: Per MIL-STD 202 Method 208 guaranteed
Polarity: Color band denotes cathode
Mounting Position: Any
Weight: 0.04 Ounces (1.12 Grams)
C11
Ratings at 25 C ambient temperature unless otherwise specified.
Single phase, half wave, 60Hz, resistive or inductive load.
For capacitive loads, derate current by 20%.
Average Forward Rectified Current @ T = (as shown)
A
PARAMETER (TEST CONDITIONS)
Maximum DC Blocking Voltage
Peak Forward Surge Current ( 8.3mS single half sine wave
superimposed on rated load)
Maximum Forward Voltage at:
Maximum Peak Recurrent Reverse Voltage
Maximum RMS Voltage
Series Number
I
O
V
RMS
V
RRM
V
RM
SYMBOL
RATINGS
VOLTS
AMPS
UNITS
VOLTS
V
FM
I
FSM
200
Color Band
Denotes
Cathode
LD (Dia)
BD (Dia)
LL
BL
LL
1.20
1.25
ACTUAL SIZE OF
DO-27 PACKAGE
Sym
In
mm
Minimum
Maximum
BL
BD
LL
LD
1.00
0.048
In
mm
0.365
0.205
0.052
9.28
5.2
1.3
25.4
1.2
UFR UFR
UFR
UFR UFR UFR
UFR UFR
UFR
401 402
403
404
406
408 409
410
50
50
100
100
200
200
300
300
400
400
35
70
140
210
280
600
600
800
800
900
900
1000
1000
420
560 630
700
@T =80 C
A
o
@T =55 C
A
o
1.70
1.85
400
SERIES UFR400 - UFR410
DO - 27
4
4
Typical Thermal Resistance:
Maximum Average DC Reverse Current
At Rated DC Blocking Voltage
I
RM
R
JL
R
JA
C/W
A
@ T = 25 C
J
o
@ T = 125 C
J
o
10
50
5
50
7.5
18.0
(1) Measured at 1MHz and an applied reverse voltage of 4 volts.
Junction Operating and Storage Temperature Range
T
J,
T
STG
C
Typical Junction Capacitance (Note 1)
C
J
pF
-65 to +175
3.01 ufr400
NOTES:
Maximum Reverse Recovery Time (I =0.5A, I =1A, I
=0.25A)
F
R
RR
T
RR
nSec
50
60
75
45
3-Amps DC
4-Amps DC
Junction to Lead
Junction to Air
Tel.: (310) 767-1052
Fax: (310) 767-7958
DIOTEC ELECTRONICS CORP.
Gardena, CA 90248
U.S.A
18020 Hobart Blvd., Unit B
LOW SWITCHING NOISE
LOW THERMAL RESISTANCE
HIGH SWITCHING CAPABILITY
LOW FORWARD VOLTAGE DROP
R
PROPRIETARY
JUNCTION
PASSIVATION FOR SUPERIOR RELIABILITY AND
PERFORMANCE
SOFT GLASS
VOID FREE VACUUM DIE SOLDERING FOR MAXIMUM
MECHANICAL STRENGTH AND HEAT DISSIPATION
(Solder Voids: Typical < 2%, Max. < 10% of Die Area)
FIGURE 5. TYPICAL JUNCTION CAPACITANCE
Reverse Voltage, (Volts)
RATING & CHARACTERISTIC CURVES FOR SERIES UFR400 - UFR410
Data Sheet No. SESA-401-2C
FIGURE 3. TYPICAL FORWARD CHARACTERISTICS
Instantaneous Forward Voltage (Volts)
1.0
0.1
10
100
0.01
FIGURE 4. TYPICAL REVERSE CHARACTERISTICS
Percent of Rated Peak Reverse Voltage
0.01
0.005
0.1
1.0
10
100
500
FIGURE 1. FORWARD CURRENT DERATING CURVE
Ambient Temperature, C
o
FIGURE 2. MAXIMUM NON-REPETITIVE SURGE CURRENT
Number of Cycles at 60 Hz
1
10
100
250
200
150
100
50
0
4 AMP ULTRAFAST RECOVERY DIODES
3.01 ufr400
100
120
140
NOTES
(1)
(2)
(3) T = 25 C, Pulse Width = 300 Sec, 2.0% Duty Cycle
(4) These Curves Are Typical For The Highest Voltage Diode
in The Voltage Grouping.
Lead Length = 0.375" (9.5mm)
JEDEC Method, 8.3 mSec. Single Half Sine Wave
J
o
NOTE 1
NOTE 2
C12
20
40
0
60
80
10
100
Resistive and Inductive Loads
UFR406-410
UFR400-404
(1) UFR400-404
(2) UFR406-410
(1) UFR400-404
(2) UFR406-410
(1)
(1)
(2)
(2)
Tel.: (310) 767-1052
Fax: (310) 767-7958
DIOTEC ELECTRONICS CORP.
Gardena, CA 90248
U.S.A
18020 Hobart Blvd., Unit B
T = 175 C
J
o
T = 25 C
J
o
T = 25 C
J
o
(1)
(1) UFR400-404
(2) UFR406-410
(2)
T = 175 C
J
o
(2)
(1)
20
10
0
30
40
50
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