DTO25

www.vishay.com

Vishay Sfernice

Revision: 23-Sep-15

4

Document Number: 51054

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

Single Pulse:

These informations are for a single pulse on a cold resistor at 25 °C (not already used for a dissipation) and for pulses of

100 ms maximum duration.

The formula used to calculate E is:

with:

E (J): Pulse energy

P (W): Pulse power

t (s): Pulse duration

U (V): Pulse voltage

R (Ω): Resistor

The energy calculated must be less than that allowed by the graph.

Repetitive or Superimposed Pulses:

The following formula is used to calculate the “equivalent“ energy of a repetitive pulse or the “equivalent energy“ of a pulse on

a resistor that is already dissipating power.

with:

E (J): Known pulse energy

P

P

continuous power of resistor.

PACKAGING

• Tube: max. 50 units per tube

• Reel: max. 500 units per reel

MARKING

Model, style, resistance value (in

Ω), tolerance (in %), manufacturing date, Vishay Sfernice trademark.

E

U

2

R

--------

==

E

c

P

a

P

r

------

+





=

5.2

0.8

1.6

0.9

14.5

0.8

0.5

8.7

3

1

17°

R 0.5