Bulletin PD-20721 rev. A 06/02
249NQ...(R) SERIES
SCHOTTKY RECTIFIER
240 Amp
D-67
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 240Apk, T
J
=125°C
range
Description/ Features
The 249NQ...(R) high current Schottky rectifier module series
has been optimized for low reverse leakage at high tempera-
ture. The proprietary barrier technology allows for reliable
operation up to 175° C junction temperature. Typical applica-
tions are in switching power supplies, converters, free-
wheeling
diodes, and reverse battery protection.
175° C T
J
operation
Unique high power, Half-Pak module
Replaces four parallel DO-5's
Easier to mount and lower profile than DO-5's
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
249NQ...(R) Units
240
135 to 150
20000
0.72
- 55 to 175
A
V
A
V
°C
249NQ150
Lug Terminal Anode
Base Cathode
249NQ150R
Lug Terminal Cathode
Base Anode
Outline D-67 HALF PAK Module
Dimensions in millimeters and (inches)
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1
249NQ...(R) Series
Bulletin PD-20721 rev. A 06/02
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
V
RWM
Max. Working Peak Reverse Voltage (V)
249NQ135
135
249NQ150
150
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
* See Fig. 5
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current * See Fig. 7
Non-Repetitive Avalanche Energy
Repetitive Avalanche Current
249NQ Units
240
20000
2300
15
1
A
Conditions
50% duty cycle @ T
C
= 117° C, rectangular wave form
Following any rated
load condition and
10ms Sine or 6ms Rect. pulse with rated V
RRM
applied
5µs Sine or 3µs Rect. pulse
T
J
= 25 °C, I
AS
= 1 Amps, L = 30 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
A
mJ
A
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
* See Fig. 1
(1)
249NQ Units
1.07
1.27
0.74
0.86
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 240A
@ 480A
@ 240A
@ 480A
T
J
= 25 °C
T
J
= 125 °C
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
C
T
L
S
Max. Reverse Leakage Current (1)
* See Fig. 2
Max. Junction Capacitance
Typical Series Inductance
6
85
6000
5.0
10000
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 °C
From top of terminal hole to mounting plane
(Rated V
R
)
dv/dt Max. Voltage Rate of Change
(1) Pulse Width < 300µs, Duty Cycle < 2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
249NQ Units
-55 to 175
-55 to 175
0.20
0.15
°C
°C
°C/W
°C/W
DC operation
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case
R
thCS
Typical Thermal Resistance, Case to
Heatsink
wt
T
Approximate Weight
Mounting Torque
Terminal Torque
Case Style
Min.
Max.
Min.
Max.
* See Fig. 4
Mounting surface , smooth and greased
25.6 (0.9) g (oz.)
40 (35)
58 (50)
58 (50)
86 (75)
Kg-cm
(Ibf-in)
Non-lubricated threads
HALF PAK Module
2
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249NQ...(R) Series
Bulletin PD-20721 rev. A 06/02
1000
1000
100
Reverse Current - I
R
(mA)
T = 175˚C
J
150˚C
125˚C
100˚C
75˚C
10
1
0.1
50˚C
100
Instantaneous Forward Current - I
F
(A)
T
J
= 175˚C
T
J
= 125˚C
T
J
= 25˚C
0.01
0.001
0
30
25˚C
60
90
120
150
Reverse Voltage - V
R
(V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage
10000
Junction Capacitance - C
T
(pF)
10
T = 25˚C
J
1000
1
0
0.4
0.8
1.2
1.6
Forward Voltage Drop - V
FM
(V)
2
100
0
30
60
90
120
Reverse Voltage - V
R
(V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 1 - Max. Forward Voltage Drop Characteristics
1
Thermal Impedance Z
thJC
(°C/W)
0.1
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
P
DM
t1
0.01
Notes:
t2
Single Pulse
(Thermal Resistance)
1. Duty factor D = t1 / t 2
2. Peak T
J
= P
DM
x Z
thJC
+ T
C
0.001
0.00001
0.0001
0.001
0.01
0.1
1
10
100
t
1
, Rectangular Pulse Duration (Seconds)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics
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3
249NQ...(R) Series
Bulletin PD-20721 rev. A 06/02
180
Allowable Case Temperature - (°C)
280
Average Power Loss - (Watts)
160
DC
240
200
160
140
120
100
Square wave (D = 0.50)
Rated V applied
R
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
DC
RMS Limit
120
80
40
0
0
100
200
300
400
Average Forward Current - I
F
(AV)
(A)
Fig. 6 - Forward Power Loss
Characteristics
80
see note (2)
60
0
100
200
300
400
Average Forward Current - I
F
(AV)
(A)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current
Non-Repetitive Surge Current - I
FSM
(A)
100000
At Any Rated Load Condition
And With Rated VRRM Applied
Following Surge
10000
1000
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Max. Non-Repetitive Surge Current
L
H IG H-SPE ED
SW ITC H
FR EE-W H E EL
D IO D E
40H FL40 S02
V d = 25 V olt
D UT
IRFP460
Rg = 25 ohm
+
C URRE NT
M O N ITO R
Fig. 8 - Unclamped Inductive Test Circuit
(2)
Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= rated V
R
4
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249NQ...(R) Series
Bulletin PD-20721 rev. A 06/02
Data and specifications subject to change without notice.
This product has been designed and qualified for Industrial Level.
Qualification Standards can be found on IR's Web site.
IR WORLD HEADQUARTERS:
233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7309
Visit us at www.irf.com for sales contact information. 06/02
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