349

Revised: November 1, 2010 05:04 PM

©2010 Littelfuse, Inc

Specifications are subject to change without notice.

Please refer to http://www.littelfuse.com for current information.

15 / 20 / 25 Amp Rectifiers

Dxx15L & Dxx20L & Dxx25L Series

70

75

80

85

90

95

100

105

110

115

120

125

130

02

46

81012141618

CURRENT WAVEFORM: Sinusoidal

LOAD: Resistive or Inductive

CONDUCTION ANGLE: 180°

Dxx25L

Dxx20L

Dxx15L

Average Forward Current [I

Figure 3: Maximum Allowable Case Temperature vs.

Average On-State Current

Figure 4: Surge Peak On-State Current vs.

Number of Cycles

Note: xx = voltage

1

10

100

1000

110100

1000

Surge Current Duration -- Full Cycles

Dxx15L

Dxx25L

Dxx20L

Supply Frequency: 60Hz Sinusoidal

Load: Resistive

RMS Forward Current : [I

Value at Specific Case Temperature

Soldering Parameters

Reflow Condition

Pb – Free assembly

Pre Heat

-Temperature Min (T

150°C

-Temperature Max (T

200°C

-Time (min to max) (t

60 – 180 secs

Average ramp up rate (LiquidusTemp)

(T

5°C/second max

T

5°C/second max

Reflow

-Temperature (T

217°C

-Temperature (t

60 – 150 seconds

PeakTemperature (T

Time within 5°C of actual peak

Temperature (t

20 – 40 seconds

Ramp-down Rate

5°C/second max

Time 25°C to peakTemperature (T

8 minutes Max.

Do not exceed

280°C

Time

25

time to peak temperature

Preheat

Preheat

Ramp-up

Ramp-up

Ramp-down

Ramp-do