1N5817G - MICROSEMI - Products.Express

July 2011 Doc ID 6262 Rev 5 1/7

1N5817, 1N5818, 1N5819

Low drop power Schottky rectifier

Features

■Very small conduction losses

■Negligible switching losses

■Extremely fast switching

■Low forward voltage drop

■Avalanche capability specified

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.

Table 1. Device summary

Symbol Value Unit

IF(AV) 1A

VRRM 40 V

Tj150 °C

VF (max) 0.45 V

DO-41

www.st.com

Characteristics 1N5817, 1N5818, 1N5819

2/7 Doc ID 6262 Rev 5

1 Characteristics

To evaluate the conduction losses use the following equations :

P = 0.3 x IF(AV) + 0.090 IF2(RMS ) for 1N5817 / 1N5818

P = 0.3 x IF(AV) + 0.150 IF2(RMS ) for 1N5819

Table 2. Absolute ratings (limiting values)

Symbol Parameter

Value

Unit

1N5817 1N5818 1N5819

VRRM Repetitive peak reverse voltage 20 30 40 V

IF(RMS) Forward rms current 10 A

IF(AV)

Average forward

current TL = 125 °C, δ = 0.5 1 A

IFSM

Surge non repetitive

forward current tp = 10 ms Sinusoidal 25 A

PARM

Repetitive peak

avalanche power tp = 1 µs, Tj = 25 °C 1200 1200 900 W

Tstg Storage temperature range -65 to + 150 °C

TjMaximum operating junction temperature(1)

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

150 °C

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

Table 3. Thermal resistances

Symbol Parameter Value Unit

Rth (j-a) Junction to ambient Lead length = 10 mm 100 °C/W

Rth (j-l) Junction to lead Lead length = 10 mm 45 °C/W

Table 4. Static electrical characteristics

Symbol Parameter Tests conditions 1N5817 1N5818 1N5819 Unit

IR (1)

1. Pulse test : tp = 380 µs, δ < 2%

Reverse leakage

current

Tj = 25 °C VR = VRRM

0.5 0.5 0.5 mA

Tj = 100 °C 10 10 10 mA

VF (1) Forward voltage drop Tj = 25 °C IF = 1 A 0.45 0.50 0.55 V

Tj = 25 °C IF = 3 A 0.75 0.80 0.85 V

dPtot

dTj <1

Rth(j-a)

1N5817, 1N5818, 1N5819 Characteristics

Doc ID 6262 Rev 5 3/7

Figure 1. Average forward power dissipation

versus average forward current

(1N5817/1N5818)

Figure 2. Average forward power dissipation

versus average forward current

(1N5819)

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

0.0

0.1

0.2

0.3

0.4

0.5

0.6 PF(av)(W)

IF(av) (A)

=tp/T tp

d= 0.2 d= 0.5

d=1

d= 0.05

d= 0.1

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

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

PF(av)(W)

IF(av) (A)

d=tp/T tp

d= 0.2 d= 0.5

d=1

d= 0.05

d= 0.1

Figure 3. Average forward current versus

ambient temperature

(δ = 0.5) (1N5817/1N5818)

Figure 4. Average forward current versus

ambient temperature

(δ = 0.5) (1N5819)

0 25 50 75 100 125 150

0.0

0.2

0.4

0.6

0.8

1.0

1.2

IF(av)(A)

Tamb(°C)

=tp/T tp

Rth(j-a)=100°C/W

Rth(j-a)=Rth(j-l)=45°C/W

0 25 50 75 100 125 150

0.0

0.2

0.4

0.6

0.8

1.0

1.2 IF(av)(A)

Tamb(°C)

=tp/T tp

Rth(j-a)=100°C/W

Rth(j-a)=Rth(j-l)=45°C/W

Figure 5. Normalized avalanche power

derating versus pulse duration

Figure 6. Normalized avalanche power

derating versus junction

temperature

0.001

0.01

0.10.01 1

0.1

10 100 1000

t (µs)

P(t

P (1 µs)

ARM

0.2

0.4

0.6

0.8

1.2

25 50 75 100 125 150

T (°C)

P(T

P (25 °C)

ARM

Characteristics 1N5817, 1N5818, 1N5819

4/7 Doc ID 6262 Rev 5

Figure 7. Non repetitive surge peak forward

current versus overload duration

(maximum values) (1N5817/1N5818)

Figure 8. Non repetitive surge peak forward

current versus overload duration

(maximum values) (1N5819)

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

10 IM(A)

t(s)

Ta=100°C

Ta=75°C

Ta=25°C

=0.5

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

8IM(A)

t(s)

Ta=100°C

Ta=75°C

Ta=25°C

=0.5

Figure 9. Relative variation of thermal

impedance junction to ambient

versus pulse duration

Figure 10. Junction capacitance versus

reverse voltage applied

(typical values)

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

0.0

0.2

0.4

0.6

0.8

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

δ=tp/T tp

tp(s)

δ= 0.1

δ= 0.2

δ= 0.5

Single pulse

(epoxy printed circuit board,

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

1 2 5 102040

100

200

500

C(pF)

VR(V)

1N5819

1N5817

1N5818

F=1MHz

Tj=25°C

Figure 11. Reverse leakage current versus

reverse voltage applied (typical

values) (1N5817/1N5818)

Figure 12. Reverse leakage current versus

reverse voltage applied (typical

values) (1N5819)

0 5 10 15 20 25 30

1E-3

1E-2

1E-1

1E+0

1E+1 IR(mA)

1N5817

1N5818

VR(V)

Tj=100°C

Tj=25°C

Tj=125°C

0 5 10 15 20 30 35 40

1E-3

1E-2

1E-1

1E+0

1E+1 IR(mA)

VR(V)

Tj=100°C

Tj=25°C

Tj=125°C

1N5817, 1N5818, 1N5819 Characteristics

Doc ID 6262 Rev 5 5/7

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

Figure 13. Forward voltage drop versus

forward current (typical values)

(1N5817/1N5818)

Figure 14. Forward voltage drop versus

forward current (typical values)

(1N5819)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

0.01

0.10

1.00

10.00 IFM(A)

VFM(V)

Tj=25°C

Tj=100°C

Tj=125°C

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

0.01

0.10

1.00

10.00 IFM(A)

VFM(V)

Tj=25°C

Tj=100°C

Tj=125°C

1 10 100 1000

30 IFSM(A)

Number of cycles

F=50Hz

Tj initial=25°C

Package Information 1N5817, 1N5818, 1N5819

6/7 Doc ID 6262 Rev 5

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

specifications, grade definitions and product status are available at: www.st.com.

ECOPACK® is an ST trademark.

3 Ordering information

4 Revision history

Table 5. DO-41 (Plastic) dimensions

Ref.

Dimensions

Millimeters Inches

Min. Max. Min. Max.

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

ØD ØB

Table 6. Ordering information

Order code Marking Package Weight Base qty Delivery mode

1N581x Part number

cathode ring DO-41 0.34 g 2000 Ammopack

1N581xRL Part number

cathode ring DO-41 0.34 g 5000 Tape and reel

Table 7. Document revision history

Date Revision Changes

Jul-2003 4A Last update.

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

1N5817, 1N5818, 1N5819

Doc ID 6262 Rev 5 7/7

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