C&H Technology DTO25 - Manual (Page 5)

Document Number: 51054 For technical questions, contact: [email protected] www.vishay.com
Revision: 19-Jan-09 17
DTO25
Surface Mounted Power Resistor
Thick Film Technology
Vishay Sfernice
Preliminary
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
c
(J): Equivalent pulse energy
E (J): Known pulse energy
P
r
: Resistor power rating
P
a
: Mean power being dissipated
The energy calculated must be less than that allowed by the graph and the average power dissipated ( P
a
) must not exceed the
continuous power of resistor.
PACKAGING
• Reel
• Tube
• Tape dimensions (mm) for reel:
MARKING
Model, Style, Resistance Value (in
Ω), Tolerance (in %), Manufacturing Date, Vishay Trademark
E
c
E x 1
P
a
P
r
------ + ⎝ ⎠
⎛ ⎞
=
ORDERING INFORMATION
DTO 25 C 100 k
Ω
± 1 % XXX e3
MODEL STYLE CONNECTIONS RESISTANCE
VALUE
TOLERANCE CUSTOM DESIGN LEAD (Pb)-FREE
F = ± 1 %
G = ± 2 %
J = ± 5 %
K = ± 10 %
Optional on request:
shape, etc
GLOBAL PART NUMBER INFORMATION
GLOBAL
MODEL
SIZE LEADS OHMIC VALUE TOLERANCE PACKAGING LEAD (Pb)-FREE
DTO 25 C = Surface mount The first four digits are
significant figures and the
last digit specifies the
number of zeros to follow.
R designates decimal point.
48R70 = 48.7
Ω
48701 = 48 700 Ω
10002 = 100 000
Ω
R0100 = 0.01 Ω
R6800 = 0.68
Ω
27000 = 2700 Ω = 2K7 Ω
F = 1 %
G = 2 %
J = 5 %
K = 10 %
R = Reel
500 pieces
T = Tube
50 pieces
E3 = Pure tin
12
8.51
12.5 24
2.9
2 5 C 1 0 0 2 R 3 T O D 0 F E