
2SK2251-01
FAP-IIA Series 
N-channel MOS-FET
2 
250V 
2A 
20W
> Features 
-
High Speed Switching
-
Low On-Resistance
-
No Secondary Breakdown
-
Low Driving Power
-
High Voltage
-
V
GS
 = ± 30V Guarantee
-
Avalanche Proof
            > Outline Drawing
> Applications
-
Switching Regulators
-
UPS
-
DC-DC converters
-
General Purpose Power Amplifier
> Maximum Ratings and Characteristics 
-
Absolute Maximum Ratings (T
C
=25°C), 
unless otherwise specified
Item 
Drain-Source-Voltage 
Drain-Gate-Voltage (R
GS
=20K
) 
Continous Drain Current 
Pulsed Drain Current 
Gate-Source-Voltage 
Max. Power Dissipation 
Operating and Storage Temperature Range 
> Equivalent Circuit
Symbol 
V
 DS 
V
 DGR 
I
 D 
I
 D(puls) 
V
 GS 
P
 D 
T
 ch 
T
 stg 
Rating 
Unit
V
V
A
A
V
W
°C
°C
250 
250 
2 
8 
±30 
20 
150 
 -55 ~ +150 
-
Item 
Drain-Source Breakdown-Voltage 
Gate Threshhold Voltage 
Zero Gate Voltage Drain Current 
Electrical Characteristics (T
C
=25°C), 
unless otherwise specified
Symbol 
V
 (BR)DSS 
V
 GS(th) 
I
 DSS 
Test conditions 
I
D
=1mA 
I
D
=1mA    V
DS=
V
GS 
V
DS
=250V 
V
GS
=0V 
V
GS
=±30V 
I
D
=1A 
I
D
=1A 
V
DS
=25V 
Min. 
250 
2,5 
Typ. 
Max. 
Unit
V
V
μA
mA
nA
S
pF
pF
pF
ns
ns
ns
ns
A
A
A
V
ns
μC
V
GS
=0V 
3,0 
10 
0,2 
10 
1,2 
1,5 
250 
50 
15 
25 
20 
50 
15 
3,5 
500 
1,0 
100 
2,0 
T
ch
=25°C 
T
ch
=125°C 
V
DS
=0V 
V
GS
=10V 
V
DS
=25V 
Gate Source Leakage Current 
Drain Source On-State Resistance 
Forward Transconductance 
Input Capacitance 
Output Capacitance 
Reverse Transfer Capacitance 
Turn-On-Time t
on
 (t
on
=t
d(on)
+t
r
) 
I
 GSS 
R
 DS(on) 
g
 fs 
C
 iss 
C
 oss 
C
 rss 
t
 d(on)
t
 r 
t
 d(off)
t
 f 
I
 AV 
I
 DR 
I
 DRM 
V
 SD 
t
 rr 
Q
 rr 
0,7 
380 
80 
25 
40 
30 
80 
25 
V
GS
=0V 
f=1MHz 
V
CC
=150V 
I
D
=2A 
V
GS
=10V 
R
GS
=10 
 
T
ch
=25°C 
Turn-Off-Time t
off 
(t
on
=t
d(off)
+t
f
) 
Avalanche Capability 
Continous Reverse Drain Current 
Pulsed Reverse Drain Current 
Diode Forward On-Voltage 
Reverse Recovery Time 
Reverse Recovery Charge 
L = 100μH 
2 
2 
4 
I
F
=2xI
DR
  V
GS
=0V   T
ch
=25°C 
I
F
=I
DR
   V
GS
=0V 
 -dI
F
/dt=100A/μs  T
ch
=25°C 
0,9 
80 
0,2 
1,4 
- Thermal Characteristics
Item 
Thermal Resistance 
Symbol 
R
 th(ch-a) 
R
 th(ch-c) 
Test conditions 
channel to air 
channel to case 
Min. 
Typ. 
Max. 
75 
6,25 °C/W
Unit
°C/W
Collmer Semconductor, Inc. - P.O. Box 702708 - Dallas, TX - 75370 - 972-233-1589 - FAX 972-233-0481 - http://www.collmer.com