Dimensions in millimeters and inches
Conform to JEDEC Outline DO-204AL (DO-41)
CASE STYLE AND DIMENSIONS
Major Ratings and Characteristics
IF(AV) Rectangular 1.0 A
waveform
VRRM 30/40 V
IFSM @ tp = 5 µs sine 225 A
VF@
1 Apk, TJ
= 25°C 0.55 V
TJrange - 40 to 150 °C
Characteristics Units The 1N5818/ 1N5819 axial leaded Schottky rectifier has been
optimized for very low forward voltage drop, with moderate
leakage. Typical applications are in switching power supplies,
converters, free-wheeling diodes, and reverse battery
protection.
Low profile, axial leaded outline
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
Description/Features
SCHOTTKY RECTIFIER 1.0 Amp
1N5818
1N5819
Bulletin PD-20590 rev. A 05/02
1
1N5818
1N5819
Device Marking: 1N581X
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1N5818, 1N5819
Bulletin PD-20590 rev. A 05/02
2www.irf.com
Part number 1N5818 1N5819
VRMax. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V)
Voltage Ratings
30 40
IF(AV) Max. Average Forward Current 1.0 A 50% duty cycle @ TL
=90 °C, rectangular wave form
* See Fig. 4
IFSM Max. Peak One Cycle Non-Repetitive 225 5µs Sine or 3µs Rect. pulse
Surge Current * See Fig. 6 35 10ms Sine or 6ms Rect. pulse
Absolute Maximum Ratings
Parameters Value Units Conditions
Following any rated
load condition and with
rated VRRM applied
A
TJMax. Junction Temperature Range -40 to 150 °C
Tstg Max. Storage Temperature Range -40 to 150 °C
RthJL Max. Thermal Resistance Junction 80 °C/W DC operation (* See Fig. 4)
to Lead (2)
wt Approximate Weight 0.33(0.012) g (oz.)
Case Style DO-204AL(DO-41)
Thermal-Mechanical Specifications
Parameters Value Units Conditions
Parameters 1N5818 1N5819 Units Conditions
VFM Max. Forward Voltage Drop 0.55 0.6 V @ 1A
* See Fig. 1 (1) 0.71 0.73 V @ 2A TJ = 25 °C
0.875 0.9 V @ 3A
0.5 0.55 V @ 1A
0.61 0.63 V @ 2A TJ = 125 °C
0.77 0.79 V @ 3A
IRM Max. Reverse Leakage Current 1.0 mA T J = 25°C
* See Fig. 2 (1) 6.0 mA T J = 100°C
12 mA T J = 125°C
CTMax. Junction Capacitance 60 pF V R = 5VDC (test signal range 100 to 1Mhz) 25°C
LSTypical Series Inductance 8.0 nH Measured lead to lead 5mm from pack. body
dv/dt Max. Voltage Rate of Change 10000 V/µs
(Rated VR)
Electrical Specifications
VR = rated VR
(1) Pulse Width < 300µs, Duty Cycle < 2%
(2) Mounted 1 inch square PCB, thermal probe connected to lead 2mm from package
1N5818, 1N5819
Bulletin PD-20590 rev. A 05/02
3
www.irf.com
10
100
0 1020304050
T = 25˚C
J
Fig. 1 - Typ. Forward Voltage Drop Characteristics
Forward Voltage Drop - VFM (V)
Instantaneous Forward Current - I F (A)
Reverse Voltage - VR (V)
Reverse Voltage - VR (V)
Junction Capacitance - C T (pF)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage
Reverse Current - I R (mA)
0.1
1
10
0 0.2 0.4 0.6 0.8 1 1.2
Tj = 150˚C
Tj = 125˚C
Tj = 25˚C
0.0001
0.001
0.01
0.1
1
10
100
010203040
125˚C
25˚C
T = 150˚C
J
1N5818, 1N5819
Bulletin PD-20590 rev. A 05/02
4www.irf.com
10
100
1000
10 100 1000 10000
At Any Rated Load Condition
And With Rated V Applied
Following Surge RRM
Average Forward Current - I F(AV) (A)
Square Wave Pulse Duration - tp (microsec)
Fig. 6 - Typ . Non-Repetitive Surge Current
Allowable Lead Temperature (°C)
Non-Repetitive Surge Current - I FSM
(A)
Fig. 5- Forward Power Loss Characteristics
Average Power Loss (Watts)
(2) Formula used: TC = TJ - (Pd + PdREV) x RthJC
;
Pd = Forward Power Loss = IF(AV) x VFM @ (IF(AV) / D) (see Fig. 6);
PdREV = Inverse Power Loss = VR1 x IR (1 - D); IR @ VR1
= 80% rated VR
Fig. 4 - Typ. Allowable Lead Temperature
Vs. Average Forward Current
40
60
80
100
120
140
160
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
DC
Square wave (D = 0.50)
Rated Vr applied
see note (3)
0
0.2
0.4
0.6
0.8
0 0.5 1 1.5
DC
RMS Limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
DC
Average Forward Current - I F(AV) (A)
1N5818, 1N5819
Bulletin PD-20590 rev. A 05/02
5
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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. 05/02
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.
Ordering Information Table
Device Code
12
1- Part Number
2- TR= Tape & Reel package (5000 pcs)
- = Box package (1000 pcs)
1N5819 TR
1N5818 = 1A, 30V
1N5819 = 1A, 40V
