SEMICONDUCTOR
NKFD300 Series
FRED
Ultrafast Soft Recovery Diode, 300 A
Non-Isolation
92±0.5
80±0.5
60±0.3
35±0.5
M6 DP10.5
RoHS
RoHS
N
ell
High Power Products
Mounting Hole
O
6.4±0.2
2
25±0.5
27±0.5
17.3±
MAX
1
9.3±0.2
14±0.5
17±0.3
Very low Q
rr
and t
rr
Lead (Pb)-free
Designed and qualified for industrial level
All dimensions in millimeters
BENEFITS
Reduced RFI and EMI
Reduced snubbing
Lug
terminal
anode
1
Lug
terminal
anode
2
Lug
terminal
anode
1
Lug
terminal
anode
2
DESCRIPTION
FRED
diodes are optimized to reduce losses and EMI/RFI
in high frequency power conditioning systems.
An extensive
characterization of the recovery behavior for different values
of current. temperature and dl/dt simplifies the calculations
of losses in the operating conditions. The softness of the
recovery eliminates the need for a snubber in most
applications. These devices are ideally suited for power
converters, motors drives and other applications where
switching losses are significant portion of the total losses.
Baseplate
Common Anode
With Suffix " A "
for common Anodes
to baseplate
Baseplate
Common Cathode
PRODUCT SUMMARY
I
F(AV)
V
R
I
F(DC)
at T
c
300A
200
to
600
V
300A
at
85ºC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Cathode to anode voltage
SYMBOL
V
R
T
C
= 25ºC
Continuous forward current
I
F
T
C
= 85ºC
T
C
=100ºC
Single pulse forward current
Non-repetitive avalanche energy
Maximum power dissipation
Operating junction and storage temperatures range
I
FSM
E
AS
P
D
T
J
, T
Stg
Limited by junction temperature
L = 100 µH, duty cycle limited by maximum T
J
T
C
= 25ºC
T
C
=100ºC
TEST CONDITIO
VALUES
200
to
600
360
300
150
1200
1.4
625
250
- 40
to
150
°C
mJ
W
A
UNITS
V
Page 1 of4
3±0.2
FEATURES
NELL
NKFD300
13±0.2
SEMICONDUCTOR
NKFD300 Series
RoHS
RoHS
N
ell
High Power Products
ELECTRICAL SPECIFICATIONS
PARAMETER
Cathode to anode
breakdown voltage
V
BR
(T
J
= 25
ºC unless otherwise specified)
TEST CONDITIONS
I
R
= 100
µA
I
F
= 150
A
-
-
-
-
-
-
MIN.
TYP.
200
to 600
1.1
1.3
1
0.9
370
5
1.35
1.54
1.2
3
500
-
pF
µA
V
MAX.
UNITS
SYMBOL
Maximum forward voltage
V
F
l
R
C
T
L
S
I
F
= 320
A
I
F
= 150
A, T
J
= 100
ºC
T
J
= 125
ºC, V
R
= V
RRM
V
R
= 200
V
From top of terminal hole to
mounting plane
Maximum reverse leakage current
Junction capacitance
Series inductance
DYNAMIC RECOVERY CHARACTERISTICS
PARAMETER
SYMBOL
(T
J
= 25
ºC unless otherwise specified)
MIN.
TYP.
75
-
-
-
IF
= 60
A
dI
F
/dt = 200
A/µs
VR
= 200
V
-
-
-
-
-
90
290
8.7
18
420
2600
300
280
MAX.
-
140
440
20
30
1100
7000
-
-
A/µs
A
ns
UNITS
TEST CONDITIONS
I
F
= 0.5A, I
R
= 1A, I
RR
= 0.25A
Reverse recovery time
t
rr
TJ
= 25
ºC
TJ
= 125
ºC
TJ
= 25
ºC
TJ
= 125
ºC
TJ
= 25
ºC
TJ
= 125
ºC
TJ
= 25
ºC
TJ
= 125
ºC
Peak recovery current
l
RRM
Reverse recovery charge
Q
rr
dl(rec)/dt
nC
Peak rate of recovery current
THERMAL
-
MECHANICAL SPECIFICATIONS
PARAMETER
Maximum junction and storage temperature range
per leg
Thermal resistance, junction to case
per module
Typical thermal resistance, case to heatsink
Weight
Mounting torque (baseplate), M6
(1)
Terminal torque (terminal), M6
R
thCS
R
thJC
-
-
-
-
-
-
-
0.12
95
3.4
-
-
SYMBOL
T
J
, T
stg
MIN.
40
-
TYP.
-
-
MAX.
150
0.23
0.115
-
-
-
4
N⋅ m
3
g
oz.
°C/W
K/W
UNITS
°C
Note
(1) Mounting surface must be smooth, flat, free of burrs of other protrusions. Apply a thin even film or thermal grease to mounting
surface. Gradually tighten each mounting bolt in 5 to 10 lbf . in steps until desired or maximum torque limits are reached.
Page 2 of 4
SEMICONDUCTOR
NKFD300 Series
RoHS
RoHS
N
ell
High Power Products
Ordering Information Tabel
Device code
NKFD
1
1
2
3
4
-
-
-
-
300
2
-
40
3
A
4
FRED family, TO-244 Package
Average current rating
Voltage Code x 10 = V
RRM
Blank for common cathode,
"A"
for common anode
Page 3 of 4
SEMICONDUCTOR
NKFD300 Series
RoHS
RoHS
N
ell
High Power Products
Fig.1 Typical Forward Characteristics
1000
Fig.2 Forward Derating Curve
200
Average Forward Rectified Current
Instantaneous Forward Current
150
Amps ( per leg )
Amps ( per leg )
120
100
Tj=25 C
90
60
10
30
Single phase , half Wave
60Hz Resistive or inductive Load
0
1
0.4
0
25
50
75
100
125
150
0.8
1.2
1.6
2.0
V
Instantaneous Forward Voltage - V
C
Case Temperature - C
Fig.3 Peak Forward Surge Current
Instantaneous Reverse Leakage Current
mA ( per leg )
Peak Forward Surge Current
Fig.4 Typical Reverse Characteristics
10000
Tj=150 C
1200
1000
Amps ( per leg )
1000
800
600
400
200
0
0
2
4
6
8 10 20
Cycles
100
Tj=125 C
10
1
Tj=25 C
40
60 80 100
0.1
0
100
200
300
400
Number of Cycles at 60Hz - Cycles
Fig.5 RG#1 Test Circuit
30us
20us
450us
40V
50V
50
30
20
D.U.T
V
Reverse Voltage - V
40
10
50
BNC
TRR TEST
4.55ms
IF=+0.5A
90%IF
Trr
TO SCOPE
Ir= - 1A
Tf<12ns
90%IR
Page 4 of 4
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