UTC SFR1020 DIODE
UTC UNISONIC TECHNOLOGIES CO., LTD. 1
www.unisonic.com.tw QW-R601-004,A
ULTRA-FAST RECOVERY RECTIFIER DIODES
DESCRIPTION
SFR1020 is dual center tap rectifier suited for high
frequency Switching Mode Power Supplies applications.
FEATURES
* HIGH SURGE CURRENT CAPABILITY
* SUITED FOR SMPS, DC ~ DC CONVERTERS
* LOW FORWARD AND REVERSE RECOVERY TIME
* LOW LOSSES
CONNECTION DIAGRAM
A1
K
A2
TO-220
1
1: A1 2: K 3: A2
*Pb-free plating product number: SFR1020L
UTC SFR1020 DIODE
UTC UNISONIC TECHNOLOGIES CO., LTD. 2
www.unisonic.com.tw QW-R601-004,A
ABSOLUTE MAXIMUM RATINGS
(limiting values, per diode)
PARAMETER SYMBOL RATINGS UNIT
Repetitive peak reverse voltage VRRM 200 V
RMS forward current IF(RMS) 10 A
Average forward current δ= 0.5
TC=125℃ (Per diode) IF(AV) 5 A
Surge non repetitive forward current
tp=10ms sinusoidal IFSM 50 A
Storage temperature range Tstg -60 ~ +150 ℃
ELECTRICAL CHARACTERISTICS
(per diode)
PARAMETER SYMBOL TEST CONDITONS MIN TYP MAX UNIT
Tj = 25℃ 50 µA
Reverse leakage current IR * Tj = 100℃ VR = VRRM 0.6 mA
Tj = 125℃ IF= 5 A 0.8 0.99
Tj = 125℃ IF= 10 A 0.95 1.20
Forward voltage drop VF **
Tj = 25℃ IF = 10 A 1.25
V
* tp = 5 ms, δ< 2 %
** tp = 380 µs, δ< 2 %
To evaluate the conduction losses use the following equation: P = 0.78× IF(AV) + 0.042 × IF2(RMS)
RECOVERY CHARACTERISTICS
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Reverse recovery time trr Tj = 25℃, IF = 0.5A , Irr = 0.25A , IR = 1A 30 ns
Formard recovery time tfr Tj = 25℃, IF= 1A, dIF/dt = 50 A/µs
VFR = 1.1×VF max
20 ns
VFP Tj = 25℃, IF= 1A, dIF/dt = 50 A/µs 3 V
THERMAL RESISTANCES
PARAMETER SYMBOL RATINGS UNIT
Per diode 4.0
Junction to case
Total Rth (j-c)
2.4
Coupling Rth (c) 0.7
℃/W
When diodes 1 and 2 are used simultaneously :
∆Tj (diode 1) = P(diode 1)×Rth(j-c)(Per diode) + P(diode 2) × Rth(c)
UTC SFR1020 DIODE
UTC UNISONIC TECHNOLOGIES CO., LTD. 3
www.unisonic.com.tw QW-R601-004,A
Average forward power dissipation versus
average forward current (per diode) Peak current versus form factor (per diode)
7
6
5
4
3
2
1
00.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
P
F
(av) (w)
δ=0.1 δ=0.2 δ=0.5
δ=1
I
F
(av) (A)
δ=tp/T tp
50
5
00.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
I
M
(A)
P=7.5W
P=5W
P=2.5W
P=10W
δ= tp/T tp
45
40
35
30
25
20
15
10
δ
δ=0.05
T
T
Average forward current versus ambient temperature Non repetitive surge peak forward current
versus overload duration
6
5
4
3
2
1
00 255075100125
150
Rth(j-a)=15℃/W
Ta (℃)
IF (av) (A)
Rth(j-a)=Rth(j-c)
δ=tp/T tp 10
0IE+0
IM(A)
IE-1IE-2IE-3
20
30
40
50
60
70
δ=0.5
Tc=125℃
t (s)
Tc=25℃
t
I
M
T
Forward voltage drop versus forward current Relative variation of thermal versus impedance
(maximum values, per diode) junction to case versus pulse duration
1.0
0.1 IE-3
K=[Zth(j-c)/Rth(j-c)]
δ=0.2
T
Single pulse
δ=tp/T tp
δ=0.5
δ=0.1
IE-2 IE-1 IE+0
t (s)
0.1
2.0
I
FM
(A)
1.0
10.0
50.0
V
FM
(V)
Tj=25℃
1.81.61.41.21.00.80.60.40.20.0
Tj=125℃
UTC SFR1020 DIODE
UTC UNISONIC TECHNOLOGIES CO., LTD. 4
www.unisonic.com.tw QW-R601-004,A
Junction capacitance versus reverse voltage
applied (typical values, per diode).
Reverse recovery charges versus dIF/dt
(per diode).
200
C (pF)
50
V
R
(V)
100101
T
j
=25℃
F=1MHz
40
30
20
10 200
Qrr (nC)
200
100
5010
100
50
20
10
d
IF
/d
t
(A/μs)
20 500
I
F
= I
F
(av)
90% confidence
T
j
=125℃
Peak reverse recovery current versus dIF/dt
(per diode).
Dynamic parameters versus junction temperature
(per diode)
200
I
RM
(A)
20.0
100
5010
10.0
1.0
0.1
d
IF
/d
t
(A/μs)
20 500
I
F
=I
F
(av)
90% confidence
T
j
=125℃
125
Qrr; I
RM
[T
j
] / Qrr; I
RM
[T
j
=125℃]
1.25
100
500
0.25
T
j
(℃)
25 150
75
0.50
0.75
1.00
IRM
Qrr
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
