MBR20 datasheet(4/7 Pages) IRF

4 / 7 page

MBR20...CT, MBRB20...CT, MBR20...CT-1

Bulletin PD-2.321 rev. I 08/02

www.irf.com

Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)

Fig. 5 - Max. Allowable Case Temperature

Vs. Average Forward Current (Per Leg)

Fig. 6 - Forward Power Loss Characteristics

(Per Leg)

(2) Formula used: T

C = TJ - (Pd + PdREV) x RthJC ;

Pd = Forward Power Loss = I

F(AV) x VFM @ (IF(AV) / D) (see Fig. 6);

REV = Inverse Power Loss = VR1 x IR (1 - D); IR @ VR1 = rated VR

100

1000

100

1000

10000

At An y Rated Load C ond ition

A n d W ith Rate d V

A p plie d

Follow in g Surg e

RRM

Sq uare W ave Pulse D uration - t

(m ic rose c )

1 0

1 2141 6

F(A V )

RM S Lim it

A vera g e Forw ard C urrent - I

(A )

D = 0 .20

D = 0 .25

D = 0 .33

D = 0 .50

D = 0 .75

10 0

11 0

12 0

13 0

14 0

15 0

101 214

F(A V)

see n ote (2)

A vera g e Forw a rd C urre n t - I

(A)

Sq ua re w ave (D = 0.50)

Rate d V

ap plie d

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