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-301-1B
FEATURES
MECHANICAL SPECIFICATION
R
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
ACTUAL SIZE OF
DO-27 PACKAGE
SERIES UFR300 - UFR310
DO - 27
LL
BD (Dia)
BL
Color Band
Denotes
Cathode
LL
Case: JEDEC DO-27 molded plastic (U/L Flammability Rating 94V-0)
Terminals: Plated axial leads
Solderability: Per MIL-STD 202 Method 208 guaranteed
LD (Dia)
Sym
Polarity: Color band denotes cathode
Minimum
In
mm
BL
Mounting Position: Any
Weight: 0.04 Ounces (1.12 Grams)
Maximum
In
mm
9.28
0.365
0.205
5.2
1.3
BD
LL
LD
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
= 55
o
C
Peak Forward Surge Current ( 8.3mS single half sine wave
superimposed on rated load)
Maximum Forward Voltage at 3 Amps DC
Maximum Average DC Reverse Current
At Rated DC Blocking Voltage
Typical Thermal Resistance, Junction to Lead
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 1 MHz and an applied reverse voltage of 4 volts.
SYMBOL
RATINGS
UFR UFR UFR UFR UFR UFR UFR UFR UFR
300 301 302 303 304 305 306 308 310
50 100 200 300 400 500 600 800 1000
35
50
70 140 210 280 350
100 200 300 400 500
3
160
1.25
5
50
20
45
50
-65 to +150
75
1.7
420 560
UNITS
V
RM
V
RMS
V
RRM
I
O
I
FSM
V
FM
o
700 VOLTS
600 800 1000
AMPS
VOLTS
µA
°C/W
pF
nSec
°C
3.01 ufr300
@ T
C
= 25 C
o
@ T
C
= 125 C
I
RM
R
θJA
C
J
T
RR
T
J,
T
STG
C9
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-301-2B
3 AMP ULTRAFAST RECOVERY DIODES
RATING & CHARACTERISTIC CURVES FOR SERIES UFR300 - UFR310
175
Resistive and Inductive Loads
160
150
125
NOTE 1
100
75
50
Ambient Temperature,
o
C
FIGURE 1. FORWARD CURRENT DERATING CURVE
25
1
10
100
Number of Cycles at 60 Hz
FIGURE 2. MAXIMUM NON-REPETITIVE SURGE CURRENT
100
100
T
J
= 150
o
C
10
UFR300-304
10
T
J
= 100
o
C
1.0
1.0
T
J
= 25
o
C
0.1
UFR305-310
0.1
0.01
0
20
40
60
80
100
120
140
Percent of Rated Peak Reverse Voltage
0.01
FIGURE 4. TYPICAL REVERSE CHARACTERISTICS
Instantaneous Forward Voltage (Volts)
FIGURE 3. TYPICAL FORWARD CHARACTERISTICS
200
160
NOTES
(1) Single Phase, Half Wave, 60 Hz; Lead Length = 0.375" (9.5mm)
UFR306-310
120
80
UFR300-305
40
(2) JEDEC Method, 8.3 mSec. Single Half Sine Wave;
(3) T
J
= 25
o
C, Pulse Width = 300
µ
Sec, 2.0% Duty Cycle
0
0.1
1
10
100
Reverse Voltage, (Volts)
FIGURE 5. TYPICAL JUNCTION CAPACITANCE
C10
4.97bsesa3a
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