Tel. 847/675-2600
Fax 847/675-1505
Ohmite Manufacturing
Company
3601 Howard St.
Skokie, Illinois 60076
Website: www.ohmite.com
E-mail: ohmite@wwa.com
19
280 Series
Corrib Fixed and Adjustable
Vitreous Enamel Power Resistors
Corrib resistors are ideal for
applications involving high
currents at very low resistance
values—as low as 0.1 ohm for the
300 Watt units. These large,
heavy-duty resistors are designed
to withstand frequent start-stop
cycles characteristic of motor
starting, dynamic braking and
other similar applications. Special
order units are available to
accommodate up to 1500 watts.
Corribsare manufactured with
corrugated resistive wire. To
accelerate cooling, the wire is
securely fused to the ceramic core
by the protective vitreous enamel
coating to improve durability Corrib
resistors are hollow-core units
which can be securely fastened to
chassis surfaces with thru bolts
and brackets.
FEATURES
Ribbed construction aids in
rapid cooling.
Designed for equipment
requiring low resistance loads
at low ohmic values and high
current capacity.
Especially constructed for
motor starting, dynamic
braking, etc.
SPECIFICATIONS
MATERIAL
Coating: Lead free vitreous
enamel except for extreme low
resistance 35 watt models, and
very large models (1000 watts
and up), which are supplied in
Silicone Ceramic.
Core: Tubular Ceramic.
Terminals: Tinned lug with hole.
Adjustable Lug: Supplied with
adjustable 300 watt models. Part
No. 1974-A or 1974-B.
0.02 –––R02
9
0.04 –––R04
<
0.06 –––R06
<
0.08 –––R08
<
0.1
–––410
< 99
0.12 –––R12
9 4
0.15 –––R15
<
0.16 –––R16
<
9
0.2
–––R20
<4 9
0.25 –––R25
<4 9
0.3
–––R30
4
0.31 –––R31
99
0.4
–––R40
<4 4
0.5
–––R50
999
4
0.6
–––R60
<
0.63 –––R63
44
STOCK PART NUMBERS FOR STANDARD RESISTANCE VALUES
0.8 –––R80
<< 4
1.0 –––1R0
44 9
4
1.2 –––1R2
9 <
1.25 –––1R25
<
1.6 –––1R6
9 4
2.0 –––2R0
9 4
2.5 –––2R5
44
3.1 –––3R1
99
4.0 –––4R0
99
5.0 –––5R0
4 9
44
6.3 –––6R3
99
8.0 –––8R0
99
10.0
–––10R
99
44
12.0
–––12R
99
16.0
–––16R
99
20.0
–––20R
99
100.0
–––100
44
*Substitute "C" in prefix with
"E" for adjustable versions.
9 = Most popular stock values
4 = Stock values
< = Non-stock values subject to
minimum handling charge per item
Part No.
No. of
Mounting
Slotted
Elongated
Resistors
Derating %
6110-8
6126-P-8
1
100%
-
6127-P-8
2
83%
-
6128-P-8
3
80%
-
6129-P-8
4
80%
Part No.
For 300 Watt Adjustable Corrib
E300KR40 - E300KR63
1974-A
E300K1R0 - E300K5R0
E300K8R0 - E300K20R
1974-B
E300KR10 - E300KR31
E300KR80 & E300K6R3
Extra Adjustable Lugs for 300 Watt Adjustable Corrib
RESISTOR HARDWARE
Thru Bolts Mounting Brackets for 300 Watt Corrib
Includes 2 each bracket, bolt, washers (centering, mica, lock)
and nut. Note: Single unit mounting contains 1 each bolt and nut;
2 each all Washers.
Prefix*
Wattage
Core Length
Core O.D.
Min. Ohms
Max. Ohms
C90
90
4.0"
0.563"
0.021
12
C100
100
3.5"
0.75"
0.021
11
C110
110
5.0"
0.563"
0.029
16
C135
135
6.0"
0.563"
0.028
21
C150
150
5.0"
1.0"
0.043
27
C160
160
6.0"
0.75"
0.038
26
C180
180
6.5"
0.75"
0.031
29
C190
190
6.0"
1.0"
0.056
35
C215
215
7.0"
1.0"
0.068
43
C220
220
6.0"
1.125"
0.063
39
C270
270
5.0"
1.5"
0.065
41
C375
375
10.5"
1.125"
0.130
80
C500
500
10.5"
1.625"
0.190
117
C750
750
12.0"
2.5"
0.310
198
C1000
1000
15.0"
2.5"
0.410
258
C1500
1500
20.0"
2.5"
0.560
358
Other Available Sizes (Partial List)
Part No.
Prefix
á
Suffix
á
Wattage
Ohmic
value
Ohmic
value
Ohmic
value
Ohmic
value
Ohmic
value
C35K
–––––––––––––––
3535353535
C300K
–––––––––––––––
300300300300300
E300K
–––––––––––––––
300300300300300
(Adjustable)(Adjustable)(Adjustable)(Adjustable)(Adjustable)
C1000K
–––––––––––––––
10001000100010001000
C1500K
–––––––––––––––
15001500150015001500
Part No.
Prefix
á
Suffix
á
Wattage
Ohmic
value
Ohmic
value
Ohmic
value
Ohmic
value
Ohmic
value
C35K
–––––––––––––––
3535353535
C300K
–––––––––––––––
300300300300300
E300K
–––––––––––––––
300300300300300
(Adjustable)(Adjustable)(Adjustable)(Adjustable)(Adjustable)
C1000K
–––––––––––––––
10001000100010001000
C1500K
–––––––––––––––
15001500150015001500
ELECTRICAL
Tolerance: ±10% (K)
Power rating: Based on 25°C
free air rating.
Derating: Linearly from
100% @ +25°C to 0%
@ +400°C.
Overload: 10 times rated wattage
for 5 seconds.
Temperature coefficient:
±400 ppm/°C. ohms:
Dielectric withstanding voltage:
1000 VAC measured from
terminal to mounting bracket.
To calculate max. amps: use the
formula
P/R
1.125 in.
28.58 mm
.500 in.
±.030
12.7 mm
±.79
Diam.
.196 in. +.015/-.006
4.979 mm +.381/-.153
8.5 in.
215.90 mm
.25 in.
6.35 mm
.75 in.
19.05 mm
.032 in.
.813 mm
min.
.75 in.
19.05 mm
Fixed/Adjustable
300 watt*
* for values over .16
, terminal dimensions same as 35 watt at left.
.563 in.
14.288 mm
2.0 in.
50.80 mm
.375 in.
9.525 mm
.094 in.
2.381 mm
Diam.
.173 in.
4.394 mm
.3125 in.
7.938 mm
Fixed
35 watt
15.88 mm
.625 in.