SEMTECH ELECTRONICS LTD.

(Subsidiary of Semtech International Holdings Limited, a company

listed on the Hong Kong Stock Exchange, Stock Code: 724)

®

Dated : 05/11/2005

AMBIENT TEMPERATURE( C)

500

0

40

400

300

200

100

600

80

120

160

o

=5mm

P.C Board

7mm

t=0.035

200

RD130E to RD200E

P - Ta Rating

RD2.0E~RD200E

TYP

Ta=25 C

RD120E

RD2.0E

RD20E

RD4.7E

RD3.9E

10

0.01

1

Iz - Zener Current - mA

RD5.6E

0.1

1

RD51E

RD100E

RD15E

DYNAMIC IMPEDANCE vs.

ZENER CURRENT

1000

10

100

RD10E

RD91E

RD7.5E

RD39E

RD2.0E

RD3.3E

100

to

RD190E

Iz - Zener Current -mA

RD150E

0.01

10

1000

100

0.1

RD140E

RD130E

1

10

RD160E

RD170E

RD180E

TYP.

Ta=25 C

RD130E to RD200E

DYNAMIC IMPEDANCE vs.

ZENER CURRENT

10000

RD200E

0

200

100

300

400

500

600

7mm

t=0.035

P.C Board

o

AMBIENT TEMPERATURE( C)

RD2.0E to RD120E

=10mm

80

40

3 mm

t=0.035

P.C Board

120

P - Ta Rating

=10mm

=5mm

160

200

200

300

400

500

600

0

100

S - SIZE OF P.C BOARD - MM

THERMAL RESISTANCE vs.

SIZE OF P. C BOARD

=5mm

20

40

60

=10mm

P.C Board

100

2

80

100

0

300

200

Junction to ambient

RD2.0E to RD120E

600

500

400

Junction to ambient

RD130E to RD200E

S - SIZE OF P.C BOARD - MM

=5mm

20

40

60

80

THERMAL RESISTANCE vs.

SIZE OF P. C BOARD

P.C Board

100

2