BY249 datasheet(3/5 Pages) PHILIPS

3 / 5 page

Philips Semiconductors

Product specification

Rectifier diodes

BY249 series

general purpose

Fig.1. Maximum forward dissipation P

F = f(IF(AV));

square wave where I

F(AV) =IF(RMS) x √D.

Fig.2. Maximum forward dissipation P

F = f(IF(AV));

sinusoidal current waveform where a = form

factor = I

F(RMS) / IF(AV).

Fig.3. Maximum non-repetitive rms forward current.

F = f(tp); sinusoidal current waveform; Tj = 150˚C prior

to surge with reapplied V

RWM.

Fig.4. Typical and maximum forward characteristic

F = f(VF); parameter Tj

Fig.5. Transient thermal impedance Z

th = f(tp)

2468

D = 1.0

0.5

0.2

0.1

BY249

IF(AV) / A

PF / W

Tmb(max) / C

150

140

130

120

Rs = 0.0200 Ohms

Vo = 1.0120 V

D =

1ms

10ms

0.1s

10s

tp / s

IFS(RMS) / A

BY229

IFSM

BY249

IF(AV) / A

PF / W

a = 1.57

1.9

2.2

2.8

Tmb(max) / C

150

140

130

120

Vo = 1.012 V

Rs = 0.02 Ohms

BY249

VF / V

IF / A

0.5

1.5

typ

max

Tj = 100 C

Tj = 25 C

1us

10us

100us

1ms

10ms

100ms

10s

0.001

0.01

0.1

BY229

pulse width, tp (s)

Transient thermal impedance, Zth j-mb (K/W)

D =

September 1998

Rev 1.300

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