Datasheet 1N5817, 1N5818, 1N5819 Datasheet (ST)

Features

■ Very small conduction losses

■ Negligible switching losses

■ Extremely fast switching

■ Low forward voltage drop

■ Avalanche capability specified

1N5817, 1N5818, 1N5819

Low drop power Schottky rectifier

A

K

Description

Axial Power Schottky rectifier suited for Switch
Mode Power Supplies and high frequency DC to
DC converters. Packaged in DO-41 these devices
are intended for use in low voltage, high
frequency inverters, free wheeling, polarity
protection and small battery chargers.

DO-41

Table 1. Device summary

Symbol Value Unit

I

F(AV)

V

RRM

T

j

(max) 0.45 V

V

F

1A

40 V

150 °C

July 2011 Doc ID 6262 Rev 5 1/7

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7

Characteristics 1N5817, 1N5818, 1N5819

1 Characteristics

Table 2. Absolute ratings (limiting values)

Value

Symbol Parameter

1N5817 1N5818 1N5819

Unit

V

I

F(RMS)

I

F(AV)

I

P

T

Repetitive peak reverse voltage 20 30 40 V

RRM

Forward rms current 10 A

Average forward
current

Surge non repetitive

FSM

forward current

Repetitive peak

ARM

avalanche power

Storage temperature range -65 to + 150 °C

stg

Maximum operating junction temperature

T

j

= 125 °C, δ = 0.5 1 A

T

L

= 10 ms Sinusoidal 25 A

t

p

t

= 1 µs, Tj = 25 °C 1200 1200 900 W

p

(1)

150 °C

dV/dt Critical rate of rise of reverse voltage 10000 V/µs

<

Rth(j-a)

1

dPtot

1. condition to avoid thermal runaway for a diode on its own heatsink.

dTj

Table 3. Thermal resistances

Symbol Parameter Value Unit

R

th (j-a)

R

Table 4. Static electrical characteristics

Junction to ambient Lead length = 10 mm 100 °C/W

Junction to lead Lead length = 10 mm 45 °C/W

th (j-l)

Symbol Parameter Tests conditions 1N5817 1N5818 1N5819 Unit

= 25 °C

T

R

V

1. Pulse test : tp = 380 µs, δ < 2%

current

(1)

Forward voltage drop

F

Reverse leakage

(1)

I

j

T

= 100 °C 10 10 10 mA

j

T

= 25 °C I

j

= 25 °C I

T

j

= V

V

R

= 1 A 0.45 0.50 0.55 V

F

= 3 A 0.75 0.80 0.85 V

F

To evaluate the conduction losses use the following equations :
P = 0.3 x I
P = 0.3 x I

2/7 Doc ID 6262 Rev 5

F(AV)

F(AV)

+ 0.090 I

+ 0.150 I

F2(RMS )

F2(RMS )

for 1N5817 / 1N5818
for 1N5819

RRM

0.5 0.5 0.5 mA

1N5817, 1N5818, 1N5819 Characteristics

Figure 1. Average forward power dissipation

versus average forward current
(1N5817/1N5818)

PF(av)(W)

0.6

0.5

0.4

d = 0.05

d = 0.1

d = 0.2

d = 0.5

d =1

0.3

0.2

T

0.1

=tp/T

0.0

IF(av) (A)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2

d

tp

Figure 3. Average forward current versus

ambient temperature
(δ = 0.5) (1N5817/1N5818)

IF(av)(A)

1.2

1.0

0.8

0.6

Rth(j-a)=Rth(j-l)=45°C/W

Rth(j-a)=100°C/W

Figure 2. Average forward power dissipation

versus average forward current
(1N5819)

PF(av)(W)

0.7

0.6

d = 0.05

d = 0.1

d = 0.2

d = 0.5

0.5

0.4

d =1

0.3

d

=tp/T

T

tp

0.2

0.1

IF(av) (A)

0.0

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2

Figure 4. Average forward current versus

ambient temperature
(δ = 0.5) (1N5819)

IF(av)(A)

1.2

1.0

0.8

0.6

Rth(j-a)=Rth(j-l)=45°C/W

Rth(j-a)=100°C/W

0.4

T

0.2

=tp/T

d

0.0
0 25 50 75 100 125 150

tp

Tamb(°C)

Figure 5. Normalized avalanche power

derating versus pulse duration

P(tp)

ARM

P (1 µs)

ARM

1

0.1

0.01

t (µs)

0.001

0.10.01 1

p

10 100 1000

0.4

T

0.2

=tp/T

d

0.0
0 25 50 75 100 125 150

tp

Tamb(°C)

Figure 6. Normalized avalanche power

derating versus junction
temperature

P(Tj)

ARM

P (25 °C)

ARM

1.2

1

0.8

0.6

0.4

0.2

0

25 50 75 100 125 150

T (°C)

j

Doc ID 6262 Rev 5 3/7

Characteristics 1N5817, 1N5818, 1N5819

t(s)

t(s)

VR(V)

VR(V)

Figure 7. Non repetitive surge peak forward

current versus overload duration
(maximum values) (1N5817/1N5818)

IM(A)

10

9

8

7

6

5

Ta=25°C

Ta=75°C

4

3

I

M

2

1

0

1E-3 1E-2 1E-1 1E+0

t

d

=0.5

Ta=100°C

Figure 9. Relative variation of thermal

impedance junction to ambient
versus pulse duration

Zth(j-a)/Rth(j-a)

1.0

(epoxy printed circuit board,

e(Cu) = 35 mm, recommended pad layout)

0.8

0.6

δ = 0.5

0.4

δ = 0.2

0.2

δ = 0.1

0.0
1E-1 1E+0 1E+1 1E+2 1E+3

Single pulse

tp(s)

δ

=tp/T

T

tp

Figure 11. Reverse leakage current versus

reverse voltage applied (typical
values) (1N5817/1N5818)

IR(mA)

1E+1

1N5818

1E+0

1E-1

Tj=125°C

1N5817

Tj=100°C

Figure 8. Non repetitive surge peak forward

current versus overload duration
(maximum values) (1N5819)

IM(A)

8

7

6

5

4

Ta=25°C

Ta=75°C

3

2

I

M

1

0
1E-3 1E-2 1E-1 1E+0

t

d

=0.5

Ta=100°C

Figure 10. Junction capacitance versus

reverse voltage applied
(typical values)

C(pF)

500

F=1MHz
Tj=25°C

200

1N5817

100

1N5818

50

1N5819

20

VR(V)

10

1 2 5 102040

Figure 12. Reverse leakage current versus

reverse voltage applied (typical
values) (1N5819)

IR(mA)

1E+1

Tj=125°C

1E+0

Tj=100°C

1E-1

1E-2

Tj=25°C

1E-3

0 5 10 15 20 25 30

1E-2

1E-3

0 5 10 15 20 30 35 40

4/7 Doc ID 6262 Rev 5

Tj=25°C

1N5817, 1N5818, 1N5819 Characteristics

Tj=25°C

Tj=100°C

Tj=125°C

Tj=25°C

Tj=100°C

Tj=125°C

F=50Hz

Tj initial=25°C

IFM(A)

forward current (typical values)
(1N5817/1N5818)

VFM(V)

Figure 14. Forward voltage drop versus

forward current (typical values)
(1N5819)

IFM(A)

10.00

1.00

0.10

0.01

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1

VFM(V)

Figure 13. Forward voltage drop versus

10.00

1.00

0.10

0.01

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

Figure 15. Non repetitive surge peak forward current versus number of cycles

IFSM(A)

30

25

20

15

Tj initial=25°C

10

5

Number of cycles

0

1 10 100 1000

Doc ID 6262 Rev 5 5/7

Package Information 1N5817, 1N5818, 1N5819

2 Package Information

● Epoxy meets UL94, V0

● Band indicates cathode

In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com
ECOPACK

Table 5. DO-41 (Plastic) dimensions

®

packages, depending on their level of environmental compliance. ECOPACK®

®

is an ST trademark.

CC

A

3 Ordering information

Table 6. Ordering information

ØD

ØB

.

Dimensions

Ref.

A 4.07 5.20 0.160 0.205

B 2.04 2.71 0.080 0.107

C25.4 1

D 0.71 0.86 0.028 0.034

Millimeters Inches

Min. Max. Min. Max.

Order code Marking Package Weight Base qty Delivery mode

1N581x

1N581xRL

Part number
cathode ring

Part number
cathode ring

DO-41 0.34 g 2000 Ammopack

DO-41 0.34 g 5000 Tape and reel

4 Revision history

Table 7. Document revision history

Date Revision Changes

Jul-2003 4A Last update.

04-Jul-2011 5 Updated Table 5.: DO-41 (Plastic) dimensions.

6/7 Doc ID 6262 Rev 5

1N5817, 1N5818, 1N5819

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Doc ID 6262 Rev 5 7/7