HIGH POWER CHIP
RESISTORS, TERMINATIONS
50 & 100 OHMS
GENERAL INFORMATION
When mounted on an appropriate heat sink, these chip devices provide
high power dissipation in terminations and as balancing resistors in
Wilkenson power divider networks. Laser trimming provides maximum
peak and average R.F. power capability.
SERIES PPC, NPC
GENERAL SPECIFICATIONS
DC Voltage (Maximum):
E = PR
Resistive Tolerance:
2% standard
Solderable Terminals:
Electroplated Silver over Nickel (PPC)
Gold over Nickel alloy (NPC)
Substrate:
Beryllium Oxide Ceramic
Resistive Element:
Thin Film and Thick Film
*
Notes:
1. The “L” and “T” dimensions are for the substrate only and do not
include terminal thickness or optional tinning thickness.
2. Thermal Resistance (R °) is measured in °C/W between resistive film
and mounting surface.
3. The CW power rating is based on maximum film temperature of
+150°C and with maximum heatsink temperature of +100°C. Power is
based on infinite and ideal heatsink. Type “W” termination style does
not have full back plane metallization and typically handles less power.
TYPICAL MODEL NO.
PPC
or
NPC
Prefix
Tinning
(if required)
Size
Terminal type (X, W or G)
Ohmic Value
(Note1)
50
50R0 (See Note Below)
TYPICAL MODEL NO.
or
T
25-50
X
1000 G
TOP
VIEW
W
B
B
50 Ohms
or
100 Ohms
TYPE X
T
L
B
B
TYPE G
T
50 Ohms
ONLY
Tolerance Key
F = 1%
G = 2% (Standard)
J = 5%
TYPE W
L
0.005
[0,13]
MAX
B
B
50 Ohms
or
100 Ohms
Note:(1)
Resistance value is expressed using military 4-digit call-out.
50R0 = 50 ohms
1000 = 100 ohms
Other values from 10–500 ohms available as special order.
Contact factory for availabilty.
T
L
PERFORMANCE SPECIFICATIONS
R
Model
Prefix
PPC 100-200A
PPC 250-250A
PPC 250-375A
NPC 25-50
W
0.100[2,5]
0.250[6,4]
0.250[6,4]
0.025[0,64]
0.050[1,27]
0.050[1,27]
0.075[1,91]
L
(Note 1)
0.200[5,1]
0.250[6,4]
0.375[9,53]
0.050[1,27]
0.050[1,27]
0.100[2,5]
0.150[3,8]
T
(Note 1)
0.040[1,02]
0.040[1,02]
0.040[1,02]
0.010[0,25]
0.010[0,25]
0.010[0,25]
0.010[0,25]
B
0.030[0,76]
0.050[1,27]
0.050[1,27]
0.012[0,305]
0.012[0,305]
0.017[0,43]
0.020[0,51]
Capacitance
(pF)
Typical
0.8
1.2
3.5
–
–
–
–
C/W
*
*
*
Maximum
(Note 2)
0.80
0.30
0.15
3.90
1.90
0.72
0.29
CW
Power
(Maximum)
(Note 3)
62W
170W
330W
12W
25W
70W
170W
Typical
Power
20W
40W
150W
3W
5W
10W
15W
*
NPC 50-50
*
NPC 50-100
NPC 75-150
*
Low cost thick film models available on these sizes. Consult factory for specifications.
KEY:
Inches[Millimeters] .XX ±.03 .XXX ±.010 [.X ±0.8 .XX ±0.25]
60 South Jefferson Road, Whippany, NJ 07981
s
Tel: 973-887-8100
s
Fax: 973-884-0445
E-Mail: sales@mcekdi-resistor.com
s
See us on the web @ www.mcekdi-resistor.com
8/02
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