I F(AV)Rectangular
440
A
waveform V
RRM range
35 to 45V I FSM @ tp = 5 μs sine 35,000A V F @ 220Apk, T J =125°C 0.51
V
(per leg)T J
range
- 55 to 125
°C
Characteristics
444CNQ...Units
Major Ratings and Characteristics The 444CNQ center tap Schottky rectifier module series has been optimized for low reverse leakage at high temperature.The proprietary barrier technology allows for reliable opera-tion up to 125 °C junction temperature. Typical applications are in high current switching power supplies, plating power supplies, UPS systems, converters, free-wheeling diodes,welding, and reverse battery protection.125 °C T J operation Center tap module
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
Description/Features
TO-244AB
SCHOTTKY RECTIFIER
440 Amp
444CNQ... SERIES
Bulletin PD-2.243 rev. B 07/00
444CNQ... Series
2PD-2.243 rev. A 12/97
https://www.sodocs.net/doc/7115451441.html,
Part number
444CNQ035
444CNQ040
444CNQ045
V R
Max. DC Reverse Voltage (V)
V RWM Max. Working Peak Reverse Voltage (V)
Voltage Ratings
Absolute Maximum Ratings
Following any rated load condition and with
rated V RRM applied Parameters
444CNQ Units Conditions
A
I F(AV)Max. Average Forward Current
440
A
50% duty cycle @ T C = 81 °C, rectangular wave form
* See Fig. 5I FSM Max. Peak One Cycle Non-Repetitive 35,0005μs Sine or 3μs Rect. pulse
Surge Current (Per Leg) * See Fig. 7380010ms Sine or 6ms Rect. pulse E AS Non-Repetitive A valanche E nergy 270mJ T J = 25 °C, I AS = 40 Amps, L = 0.34 mH
(Per Leg)
I AR
Repetitive A valanche C urrent 40
A Current decaying linearly to zero in 1 μsec
(Per Leg)
Frequency limited by T J max. V A = 1.5 x V R typical
T J Max. Junction Temperature Range -55 to 125°C T stg
Max. Storage Temperature Range
-55 to 125°C
R thJC Max. Thermal Resistance Junction
0.20°C/W DC o peration * See Fig. 4
to Case (Per Leg)R thJC Max. Thermal Resistance Junction
0.10°C/W DC o peration
to Case (Per Package)R thCS Typical Thermal Resistance, Case
0.10°C/W Mounting surface , smooth and greased to Heatsink wt Approximate W eight 79 (2.80)g (oz.)T Mounting Torque Base Min.
40 (35)Max.
58 (50)Mounting Torque Center Hole Typ.17 (15)Terminal T orque Min.
58 (50)Max.
86 (75)
Case Style
TO - 244AB Modified JEDEC
Thermal-Mechanical Specifications
Parameters
444CNQ Units Conditions
T J = 25 °C V R = rated V R
Kg-cm (Ibf-in)
Electrical Specifications
35
40
45
V FM
Max. Forward Voltage Drop 0.53
V @ 220A (Per Leg) * See Fig. 1(1)
0.69V @ 440A 0.51V @ 220A 0.68V @ 440A I RM Max. Reverse Leakage Current 20mA T J = 25 °C (Per Leg) * See Fig. 2
(1)
2400mA T J = 125 °C
C T Max. Junction Capacitance (Per Leg)10,300pF V R = 5V DC , (test signal range 100Khz to 1Mhz) 25°C L S
Typical Series Inductance (Per Leg)
5.0nH From top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change
10,000
V/ μs
(Rated V R )
Parameters
444CNQ Units Conditions
T J = 100 °C (1) Pulse Width < 300μs, Duty Cycle <2%
444CNQ... Series
3
PD-2.243 rev. A 12/97
https://www.sodocs.net/doc/7115451441.html,
444CNQ... Series
4PD-2.243 rev. A 12/97
https://www.sodocs.net/doc/7115451441.html,
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
25710121517200
50100150200250300350
89101112130
50100150200250300350
1000
10000
100000
10
100100010000
FREE-W H EEL D IO D E 40HFL40S02
C URRENT M O N ITO R
H IG H-SPE ED SW ITC H IRFP460L
D UT Rg = 25 oh m
V d = 25 Volt
+
Average Forward Current - I F(AV) (A)A l l o w a b l e C a s e T e m p e r a t u r e (°C )
Average Forward Current - I F(AV) (A)A v e r a g e P o w e r L o s s (W a t t s )
Square Wave Pulse Duration - t p (microsec)N o n -R e p e t i t i v e S u r g e C u r r e n t - I F S M (A )