Bulletin PD-2.021 rev. E 11/02
51HQ... SERIES
SCHOTTKY RECTIFIER
60 Amp
TO-203AB (DO-5)
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 60 Apk, T
J
= 125°C
range
35 to 45
10,800
0.58
- 65 to 150
V
A
V
°C
Description/ Features
Units
A
The 51HQ Schottky rectifier series has been optimized for
very low forward voltage drop, with moderate leakage. The
proprietary barrier technology allows for reliable operation
up to 150° C junction temperature. Typical applications are
in switching power supplies, converters, free-wheeling di-
odes, and reverse battery protection.
150° C T
J
operation
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Hermetic packaging
51HQ...
60
Conforms to JEDEC Outline DO-203AB (DO-5)
Dimensions in millimeters and (inches)
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1
51HQ... Series
Bulletin PD-2.021 rev. E 11/02
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
35
40
45
V
RWM
Max. Working Peak Reverse Voltage (V)
51HQ035
51HQ040
51HQ045
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
51HQ
60
10,800
1150
81
12
Units
A
Conditions
50% duty cycle @ T
C
= 96 °C, rectangular wave form
5µs Sine or 3µs Rect. pulse
10ms Sine or 6ms Rect. pulse
Following any rated
load condition and
with rated V
RRM
applied
A
mJ
A
T
J
= 25 °C, I
AS
= 12 Amps, L = 1.12 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
* See Fig. 1
(1)
51HQ
0.65
0.83
0.58
0.74
Units
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 60A
@ 120A
@ 60A
@ 120A
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
5
200
2600
7.5
10000
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 °C
Measured from top of terminal 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
51HQ
-65 to 150
-65 to 150
0.83
0.25
Units
°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
Case Style
Min.
Max.
* See Fig. 4
Mounting surface , smooth and greased
15 (0.53) g (oz.)
23 (20)
46 (40)
Kg-cm Non-lubricated threads
(Ibf-in)
JEDEC
DO-203AB(DO-5)
2
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51HQ... Series
Bulletin PD-2.021 rev. E 11/02
1000
1000
T
J
= 150°C
Reverse Current - I
R
(mA)
100
125°C
100°C
75°C
50°C
0.1
25°C
10
100
1
Instantaneous Forward Current - I
F
(A)
0.01
T = 150°C
J
0
5
10
15
20
25 30
35
40
45
10
Reverse Voltage - V
R
(V)
T
J
= 125°C
T
J
= 25°C
Junction Capacitance - C
T
(pF)
10000
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
T
J
= 25°C
1
1000
0.1
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Forward Voltage Drop - V
FM
(V)
1
1.1
100
0
10
20
30
40
50
Reverse Voltage - V
R
(V)
Fig. 1 - Maximum Forward Voltage Drop Characteristics
1
Thermal Impedance - Z
thJC
(°C/W)
D = 0.50
D = 0.33
D = 0.25
0.1
D = 0.17
D = 0.08
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
P
DM
0.01
Single Pulse
(Thermal Resistance)
0.001
0.00001
Notes:
t1
t2
1. Duty factor D = t1 / t 2
2. Peak T
J
= P
DM
x Z
thJC
+ T
C
0.01
0.1
1
10
100
0.0001
0.001
t 1 , Rectangular Pulse Duration (Seconds)
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
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3
51HQ... Series
Bulletin PD-2.021 rev. E 11/02
160
Allowable Case Temperature - (°C)
Average Power Loss - (Watts)
150
140
130
120
110
100
90
DC
R
thJC
(DC) = 0.83°C/W
60
50
40
30
20
10
0
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
DC
0
10 20
30
40
50
60
70 80
90
0
10
20
30
40
50 60
70
80 90
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
10000
Non-Repetitive Surge Current - I
FSM
(A)
Fig. 6 - Forward Power Loss Characteristics
1000
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following Surge
100
10
100
1000
10000
Square Wave Pulse Duration - t p (microsec)
Fig. 7 - Maximum Non-Repetitive Surge Current
L
HIGH-SPEED
SWITCH
FREE-WHEEL
DIODE
40HFL40S02
+
DUT
IRFP460
Rg = 25 ohm
Vd = 25 Volt
CURRENT
MONITOR
Fig. 8 - Unclamped Inductive Test Circuit
4
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51HQ... Series
Bulletin PD-2.021 rev. E 11/02
Data and specifications subject to change without notice.
This product has been designed 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. 11/02
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