DIOTEC ELECTRONICS CORP.
18020 Hobart Blvd., Unit B
Gardena, CA 90248 U.S.A
Tel.: (310) 767-1052 Fax: (310) 767-7958
Data Sheet No. SESA-401-1C
4 AMP ULTRAFAST RECOVERY DIODES
FEATURES
MECHANICAL SPECIFICATION
R
ACTUAL SIZE OF
DO-27 PACKAGE
PROPRIETARY
SOFT GLASS
JUNCTION
PASSIVATION FOR SUPERIOR RELIABILITY AND
PERFORMANCE
VOID FREE VACUUM DIE SOLDERING FOR MAXIMUM
MECHANICAL STRENGTH AND HEAT DISSIPATION
(Solder Voids: Typical < 2%, Max. < 10% of Die Area)
LOW SWITCHING NOISE
LOW THERMAL RESISTANCE
HIGH SWITCHING CAPABILITY
LOW FORWARD VOLTAGE DROP
MECHANICAL DATA
SERIES UFR400 - UFR410
DO - 27
LL
BD (Dia)
BL
Color Band
Denotes
Cathode
LL
Case: JEDEC DO-27 molded epoxy (U/L Flammability Rating 94V-0)
Terminals: Plated axial leads
LD (Dia)
Solderability: Per MIL-STD 202 Method 208 guaranteed
Polarity: Color band denotes cathode
Mounting Position: Any
Weight: 0.04 Ounces (1.12 Grams)
RoH
L
MP
O
SC
T
IAN
Sym
BL
BD
LL
LD
Minimum
In
mm
Maximum
In
mm
9.28
0.365
0.205
5.2
1.3
1.00
0.048
25.4
1.2
0.052
MAXIMUM RATINGS & ELECTRICAL CHARACTERISTICS
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%.
PARAMETER (TEST CONDITIONS)
Series Number
Maximum DC Blocking Voltage
Maximum RMS Voltage
Maximum Peak Recurrent Reverse Voltage
Average Forward Rectified Current @ T
A
= (as shown)
Peak Forward Surge Current ( 8.3mS single half sine wave
superimposed on rated load)
3-Amps DC
Maximum Forward Voltage at:
4-Amps DC
Maximum Average DC Reverse Current
At Rated DC Blocking Voltage
Typical Thermal Resistance:
Typical Junction Capacitance (Note 1)
Maximum Reverse Recovery Time (I
F
=0.5A, I
R
=1A, I
RR
=0.25A)
Junction Operating and Storage Temperature Range
NOTES: (1) Measured at 1MHz and an applied reverse voltage of 4 volts.
SYMBOL
RATINGS
UFR UFR UFR UFR UFR UFR UFR UFR UFR
400 401 402 403 404 406 408 409 410
UNITS
V
RM
V
RMS
V
RRM
I
O
I
FSM
V
FM
I
RM
R
G
JL
R
G
JA
C
J
T
RR
T
J,
T
STG
50
35
50
100 200 300
70
140 210
100 200 300
4
o
@T
A
=80 C
400
400
600
600
800 900 1000
560 630
4
o
@T
A
=55 C
700
VOLTS
800 900 1000
AMPS
280 420
200
1.20
1.25
5
50
7.5
18.0
45
50
60
-65 to +175
75
1.70
1.85
10
50
VOLTS
@ T
J
= 25 C
o
@ T
J
= 125 C
Junction to Lead
Junction to Air
o
m
A
°C/W
pF
nSec
°C
3.01 ufr400
C11
DIOTEC ELECTRONICS CORP.
18020 Hobart Blvd., Unit B
Gardena, CA 90248 U.S.A
Tel.: (310) 767-1052 Fax: (310) 767-7958
Data Sheet No. SESA-401-2C
4 AMP ULTRAFAST RECOVERY DIODES
RATING & CHARACTERISTIC CURVES FOR SERIES UFR400 - UFR410
250
Resistive and Inductive Loads
200
UFR400-404
150
100
UFR406-410
NOTE 1
50
NOTE 2
0
1
10
100
Ambient Temperature, C
FIGURE 1. FORWARD CURRENT DERATING CURVE
o
Number of Cycles at 60 Hz
FIGURE 2. MAXIMUM NON-REPETITIVE SURGE CURRENT
100
(1) UFR400-404
(2) UFR406-410
T
J
= 175
(2)
o
C
10
T
J
= 175
(1)
o
C
(2)
(1)
1.0
T
J
= 25
(2)
o
C
0.1
NOTE 4
T
J
= 25
(1)
o
C
(1) UFR400-404
(2) UFR406-410
NOTE 3
0.01
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0
20
40
60
80
100
120
140
Instantaneous Forward Voltage (Volts)
FIGURE 3. TYPICAL FORWARD CHARACTERISTICS
100
Percent of Rated Peak Reverse Voltage
FIGURE 4. TYPICAL REVERSE CHARACTERISTICS
NOTES
(1) Lead Length = 0.375" (9.5mm)
(2)
(1)
10
(2) JEDEC Method, 8.3 mSec. Single Half Sine Wave
(3) T
J
= 25 C, Pulse Width = 300
m
Sec, 2.0% Duty Cycle
o
(1) UFR400-404
(2) UFR406-410
(4) These Curves Are Typical For The Highest Voltage Diode
in The Voltage Grouping.
0
10
20
30
40
50
Reverse Voltage, (Volts)
C12
FIGURE 5. TYPICAL JUNCTION CAPACITANCE
3.01 ufr400
