Corrib
®
resistors are ideal for
applications involving high
currents at very low resis-
tance values—as low as 0.1Ω
for the 300 Watt unit. These
large, heavy-duty resistors are
designed to withstand frequent
start-stop cycles characteristic
of motor starting, dynamic
braking and other similar appli-
cations. Special order units
are available to accommodate
up to 1500 watts.
Corribs
®
are manufactured
with corrugated resistive wire.
To accelerate cooling, the wire
is securely fused to the ceram-
ic core by the protective vitre-
ous 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
• Also available in low cost
Centohm or Silicone coating.
Consult Ohmite.
• Ribbed construction aids in rapid
cooling.
• Designed for equipment requir-
ing low resistance loads at low
ohmic values and high current
capacity.
• Especially constructed for motor
starting, dynamic braking, etc.
• RoHS compliant product avail-
able. Add “E” suffix to part num-
ber to specify.
Fixed
35 watt
Diam.
0.173 in.
4.394 mm
Corrib
®
Fixed and Adjustable
Vitreous Enamel Power
0.375 in.
9.525 mm
0.094 in.
2.381 mm
280 Series
0.563 in.
14.288 mm
2.0 in.
50.80 mm
0.625 in.
15.88 mm
0.3125 in.
7.938 mm
0.25 in.
6.35 mm
sPECiFiCAtions
Material
Coating:
Lead free vitreous
enamel except for extreme low
resistance 35 watt models, and
very large models (750 watts
and up), which are supplied in
Silicone Ceramic.
Core:
Tubular Ceramic.
Terminals:
Tinned lug with hole.
RoHS solder composition is 96%
Sn, 3.5% Ag, 0.5% Cu
Adjustable Lug:
Supplied
ordering info
with adjustable 300 watt
models. Part No. 1974-A or
Coating
1974-B.
Blank = Vitreous
C = Centohm
RoHS Compliant
Electrical
S = Silicone
Tolerance:
±10% (K)
Power rating:
Based on
Series Wattage Tolerance Ohms
25°C free air rating.
C = Fixed
K = 10%
example:
Derating:
Linearly from
E = Adjustable
1R0 = 1
Ω
250 = 250
Ω
100% @ +25°C to 0%
1K0 = 1,000
Ω
@ +400°C.
25K = 25,000
Ω
Fixed/Adjustable
300 watt*
Diam.
0.196 in. +.015/-.006
0.500 in.
±.030
4.979 mm +.381/-.153
12.7 mm
±.79
0.032 in.
0.813 mm
min.
1.125 in.
28.58 mm
8.5 in.
215.90 mm
0.75 in.
19.05 mm
0.75 in.
19.05 mm
* for values over 0.16
Ω
, terminal dimensions same as 35 watt at above.
�½�½�½�½�½�½�½�½�½
25K5 = 25,500
Ω
Overload:
10 times rated wattage
for 5 seconds.
Temperature coefficient:
±400 ppm/°C.
Dielectric withstanding voltage:
1000 VAC measured from termi-
nal to mounting bracket.
To calculate max. amps:
use the
formula
√P/R
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.
No. of Moun.
Part No.
Res- Derat.
Slotted Elongated istors
%
6110-8
1
/
2
6126-P-8
1
/
2
-
-
-
6127-P-8
1
/
2
6128-P-8
1
/
2
6129-P-8
1
/
2
1
2
3
4
100%
83%
80%
80%
made-to-order partS
�½�½�½�½�½�½�½�½�½�½�½�½�½�½�½
Series
Wattage &
280 = Fixed
Core Code
230 = Adjustable See “Core and
Terminal Selection”
Terminal Type
See “Resistor
Terminals for
Tubular Cores”
Ohms
Example:
R0200 = 0.02
Ω
R2000 = 0.2
Ω
2R500 = 2.5
Ω
10R00 = 10
Ω
Tolerance
F = 1%
H = 3%
J = 5%
K = 10%
(std.)
See website for
custom core info
Lugs for 300 Watt
Adjustable Corrib
Part
No.
1
/
16
Resis-
tance
0.40
0.50
0.63
1.00
1.50
1.60
2.00
2.50
3.10
4.00
5.00
6.30
8.00
10.00
12.00
16.00
20.00
25.00
30.00
48.00
50.00
Part
No.
1974-B
1
/
8
wire
Resis-
tance
0.10
0.12
0.16
0.20
0.25
0.31
0.80
1.20
S ta n d a r d pa rt n u m b e r S f o r 2 8 0 S e r i e S
Wattage
C300K–––300
E300K–––300
C35K
–––
35
ohmic value
ohmic value
(Adjustable)
Wattage
C300K–––300
E300K–––300
C35K
–––
35
(Adjustable)
1974-A
wire
other Available sizes (Partial List)
Prefix*
C90
C100
C110
C135
C150
C160
C180
C190
C215
C220
C270
C375
C500
C750
C1000
C1500
Wattage
90
100
110
135
150
160
180
190
215
220
270
375
500
750
1000
1500
Core
Length
4.0”
3.5”
5.0”
6.0”
5.0”
6.0”
6.5”
6.0”
7.0”
6.0”
5.0”
10.5”
10.5”
12.0”
15.0”
20.0”
Core
o.D.
0.563”
0.75”
0.563”
0.563”
1.0”
0.75”
0.75”
1.0”
1.0”
1.125”
1.5”
1.125”
1.625”
2.5”
2.5”
2.5”
Min.
ohms
0.021
0.021
0.029
0.028
0.043
0.038
0.031
0.056
0.068
0.063
0.065
0.130
0.190
0.310
0.410
0.560
Max.
ohms
12
11
16
21
27
26
29
35
43
39
41
80
117
198
258
358
Part no.
Prefix
Suffix
–––R02E
–––R04E
–––R06E
–––R08E
–––R10E
–––R12E
–––R15E
–––R16E
–––R20E
–––R25E
–––R30E
–––R31E
–––R40E
–––R50E
–––R60E
–––R63E
Part no.
Prefix
Suffix
–––R80E
–––1R0E
–––1R2E
–––1R25E
–––1R6E
–––2R0E
–––2R5E
–––3R1E
–––4R0E
–––5R0E
–––6R3E
–––8R0E
–––10RE
–––12RE
–––16RE
–––20RE
–––100E
0.02
0.04
0.06
0.08
0.1
0.12
0.15
0.16
0.2
0.25
0.3
0.31
0.4
0.5
0.6
0.63
0.8
1.0
1.2
1.25
1.6
2.0
2.5
3.1
4.0
5.0
6.3
8.0
10.0
12.0
16.0
20.0
100.0
*Substitute “C” in
= Standard values; check availability
using the worldwide inventory
prefix with “E” for
search at www.ohmite.com
adjustable versions.
35
Ohmite Mfg. Co.
1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
OHMITE [ OHMITE MFG. CO. ]
