15

©2009 Littelfuse, Inc.

Specifications are subject to change without notice.

Transient Voltage Suppression Diodes

Revision: January 09, 2009

P4SMA Series

Surface Mount – 400W > P4SMA series

Please refer to http://www.Littelfuse.com/series/P4SMA.html for current information.

0.1

1

10

0.000001

0.00001

0.0001

0.001

t

0.2x0.2" (5.0x5.0mm)

Copper Pad Area

0

0

50

100

150

1.0

2.0

3.0

4.0

tr=10μsec

Peak Value

IPPM

IPPM

2

TJ=25°C

Pulse Width(td) is defined

as the point where the peak

current decays to 50% of IPPM

10/1000μsec. Waveform

as defined by R.E.A

td

t-Time (ms)

Half Value

IPPM

( )

0

20

40

60

80

100

0

25

50

75

100

125

150

175

T

1

10

100

1000

10000

1.0

10.0

100.0

1000.0

Tj=25ºC

f=1.0MHz

Vsig=50mVp-p

Uni-directional V=0V

Bi-directional V=0V

V

Bi-directional @V

R

Uni-directional @V

R

0

0.2

0.4

0.6

0.8

1

1.2

0

25

50

75

100

125

150

175

T

Figure 1 - Peak Pulse Power Rating

Figure 2 - Pulse Derating Curve

Figure 3 - Pulse Waveform

Figure 4 - Typical Junction Capacitance

Figure 5 - Steady State Power Dissipation Derating Curve

0

5

10

15

20

25

30

35

40

45

110

100

Number of Cyles at 60 Hz

Figure 6 - Maximum Non-Repetitive Forward Surge

Current Uni-Directional Only