Cement Power Resistors
(RoHS Compliant)
FEATURES
• 5% tolerance
• Exceptionally small, sturdy, and reliable
• Sealed with a special cement
• Excellent moisture resistance
• High temperature stability
• Ceramic flame retardant package
• Recommended wash method is alcohol
DERATING CHART
Percent Rated Load (%)
100
80
60
40
20
0
-50 0 50 100 150 200 250 300
Ambient Temperature (°C)
Leads Not Centered 7&10 Watts
W
d
P
5
D
L
5±1
W
70°
155
275
Heat Rise (°C)
PRM-RC Series
HEAT RISE CHART
140
120
100
80
60
40
20
0
0
5W, 7W, 10W
3W
2W
20
40
60
80
Rated Load (%)
100
Leads Centered 5 Watts
d
P
W
D
L
5±1
PART NUMBERING SYSTEM
2
8
Prefix
0
-
P
R
Series
M
5
Watts
-
1
0
Value
K
-
R
C
SERIES, WATTAGE, VALUE RANGE, AND DIMENSIONS
Series
PRM
PRM
PRM
Watts (W)
5
7
10
Leads
Centered
Not Centered
Not Centered
Ranges of Values (Ω)
Wirewound
0.1 ~ 47
0.1 ~ 680
0.1 ~ 910
Power Film
48 ~ 100K
681 ~ 200K
911 ~ 200K
W ±1
12.5
12.5
12.5
Suffix
(RoHS Compliant)
Dimensions (mm)
D ±1
9
9
9
L ±1
25
38
50
ød ±0.05
0.75
0.75
0.75
P ±1
5
5
5
STANDARD STOCKED VALUES (Ω)
0.1
0.22
0.3
0.47
0.51
0.68
1.0
2.2
3.0
4.7
6.8
10
15
20
All standard E-24 values not listed are available special order.
33
47
56
68
75
100
150
200
300
330
470
680
1K
2K
4.7K
10K
CONSTRUCTION
No.
1
2
3
4
5
6
Subpart Name
Body
End Cap
Lead
Material
Rod Type Ceramics
Tin plated iron surface
Material Generic Name
Al
2
O
3
, SiO
2
Tin : 5%, Iron : 95%
Tin-Coated Copper wire
Al
2
O
3
, SiO
2
4
5
6
3
Cement: Wire-wound
1
5
2
6
3
Cement: Power Film
4
1
2
Resistance wire
Resistance Film
Filling Materials
Ceramic Case
Annealed copper wire
(Electrosolder plated surface) Pb Free
Ceramic
Ni-Cr Alloy
Metal Oxide Film
Quartz mixed sand
Ni-Cr Alloy
Metal Oxide Film
SiO2
XC-600039
XICON PASSIVE COMPONENTS • (800) 628-0544
Specifications are subject to change without notice. No liability or warranty implied by this information. Environmental compliance based on producer documentation.
Date Revised: 6-17-14
Cement Power Resistors
(RoHS Compliant)
CHARACTERISTICS
Characteristics
Limits
PRM-RC Series
Test Methods
( JIS C 5201-1 )
Temperature
coefficient
± 350 PPM / °C Max.
<20Ω ± 400 PPM / °C
5.2 Natural resistance change per temp.
degree centigrade.
R
2
-R
1
x10
6
(PPM / °C)
R
1
(t
2
-t
1
)
R
1
: Resistance value at room temperature (t
1
)
R
2
: Resistance value at room temp. plus 100 °C (t
2
)
5.7 Resistors shall be clamped in the trough
of a 90° metallic V-block and shall be tested at
AC potential respectively for 60 +10/ -0 secs.
7.4 Resistance change after continuous
5 cycles for duty shown below:
Step
Temperature
1
-55 °C ± 3 °C
2
Room temp.
3
+155 °C ± 2 °C
4
Room temp.
5.5 Permanent resistance change after the
application of a potential of 2.5 times RCWV
for 5 seconds
7.9 Resistance change after 1,000 hours
operating at RCWV with duty cycle of
(1.5 hours "on", 0.5 hour "off") in a humidity test
chamber controlled at 40 °C ± 2 °C and 90 to 95 %
relative humidity
7.10 Permanent resistance change after
1,000 hours operating at RCWV with duty cycle
of (1.5 hours “on”, 0.5 hour “off”)
at 70 °C ±2 °C
6.1
Direct load :
Resistance to a 2.5 kgs direct load for 10 secs.
in the direction of the longitudinal axis of the
terminal leads
Twist test :
Terminal leads shall be bent through 90 ° at
a point of about 6mm from the body of the
resistor and shall be rotated through 360°
about the original axis of the bent terminal in
alternating direction for a total of 3 rotations
6.4 Permanent resistance change when leads
immersed to 3.2 to 4.8 mm from the body in
350 °C ± 10 °C solder for 3 ± 0.5 secs.
6.5 The area covered with a new , smooth
clean , shiny and continuous surface free
from concentrated pinholes.
Test temp. of solder : 245 °C ± 3 °C
Dwell time in solder : 2 ~ 3 seconds
Time
30 mins
10 ~ 15 mins
30 mins
10 ~ 15 mins
Dielectric
withstanding
voltage
No evidence of flashover,
mechanical damage, arcing
or insulation break down
Temperature
cycling
Resistance change rate is
± (2% + 0.05Ω) Max. with no
evidence of mechanical damage
Short time
overload
Resistance change rate is
± (5% + 0.05Ω) Max. with no
evidence of mechanical damage
Resistance value
Wire-wound
Power film: <100KΩ
>100KΩ
Resistance value
Wire-wound
Power film: <100KΩ
>100KΩ
Load life in
humidity
∆
R/R
± 5%
± 5%
± 10%
Load life
∆
R/R
± 5%
± 5%
± 10%
Terminal strength
No evidence of mechanical
damage
Resistance to
soldering heat
Resistance change rate is
± (1% + 0.05Ω) Max. with no
evidence of mechanical damage
Solderability
95 % coverage Min.
XICON PASSIVE COMPONENTS • (800) 628-0544
XC-600039
Date Revised: 6-17-14
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