C300KR10E Datasheet, PDF (1/1 Pages) Ohmite Mfg. Co. – Corrib Fixed and Adjustable Vitreous Enamel Power

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.
F ea t u r e s
• 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.
Spec i f i ca t i o n s
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
280 Series
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
0.563 in.
14.288 mm
0.625 in.
15.88 mm
2.0 in.
50.80 mm
0.3125 in.
7.938 mm
Fixed/Adjustable
300 watt*
Diam.
0.500 in. ±.030
12.7 mm ±.79
0.196 in. +.015/-.006
4.979 mm +.381/-.153
0.25 in.
6.35 mm
0.032 in.
0.813 mm
min.
1.125 in.
28.58 mm
0.75 in.
8.5 in.
19.05 mm
215.90 mm
0.75 in.
19.05 mm
* for values over 0.16Ω, terminal dimensions same as 35 watt at above.
ordering infO
Adjustable Lug: Supplied
with adjustable 300 watt
Coating
Blank = Vitreous
C = Centohm
S = Silicone
RoHS Compliant
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Series Wattage Tolerance Ohms
C = Fixed
K = 10% example:
E = Adjustable
1R0 = 1 Ω
250 = 250 Ω
1K0 = 1,000 Ω
25K = 25,000 Ω
25K5 = 25,500 Ω
models. Part No. 1974-A or
1974-B.
Electrical
Tolerance: ±10% (K)
Power rating: Based on
25°C free air rating.
Derating: Linearly from
100% @ +25°C to 0%
@ +400°C.
Made-to-order parts
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 %
6110-8¹/2 6126-P-8¹/2 1 100%
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- 6127-P-8¹/2 2 83%
- 6128-P-8¹/2 3 80%
Series
Wattage &
Terminal Type
280 = Fixed
Core Code
See “Resistor
230 = Adjustable See “Core and
Terminals for
Terminal Selection” Tubular Cores”
Ohms
Tolerance
Example:
F = 1%
R0200 = 0.02 Ω H = 3%
R2000 = 0.2 Ω J = 5%
2R500 = 2.5 Ω K = 10% (std.)
10R00 = 10 Ω
See website for
custom core info
- 6129-P-8¹/2 4 80%
Lugs for 300 Watt
Adjustable Corrib
Part Resis- Part
No. tance
No.
Resis-
tance
Part No.
Prefix 
Suffix
0.02 –––R02E
0.04 –––R04E
0.06 –––R06E
0.08 –––R08E
0.1 –––R10E
0.12 –––R12E
0.15 –––R15E
0.16 –––R16E
0.2 –––R20E
0.25 –––R25E
0.3 –––R30E
0.31 –––R31E
0.4 –––R40E
0.5 –––R50E
Standard part numbers for 280 series
Wattage








Wattage
Part No.
Prefix 
Suffix
0.8 –––R80E
1.0 –––1R0E
1.2 –––1R2E
1.25 –––1R25E
1.6 –––1R6E
2.0 –––2R0E
2.5 –––2R5E
3.1 –––3R1E
4.0 –––4R0E
5.0 –––5R0E
6.3 –––6R3E
8.0 –––8R0E
10.0 –––10RE
12.0 –––12RE













Prefix*
C90
C100
C110
C135
C150
C160
C180
C190
C215
C220
C270
C375
C500
C750
C1000
C1500
Other Available Sizes (Partial List)
Core
Core
Min.
Wattage Length O.D. Ohms
90
4.0”
0.563” 0.021
100
3.5”
0.75” 0.021
110
5.0”
0.563” 0.029
135
6.0”
0.563” 0.028
150
5.0”
1.0”
0.043
160
6.0”
0.75” 0.038
180
6.5”
0.75” 0.031
190
6.0”
1.0”
0.056
215
7.0”
1.0”
0.068
220
6.0”
1.125” 0.063
270
5.0”
1.5”
0.065
375 10.5”
1.125” 0.130
500 10.5”
1.625” 0.190
750 12.0”
2.5”
0.310
1000 15.0”
2.5”
0.410
1500 20.0”
2.5”
0.560
Max.
Ohms
12
11
16
21
27
26
29
35
43
39
41
80
117
198
258
358
1974-A 0.40 1974-B 0.10
1_{/16 wire 0.50} 1_{/8 wire 0.12}
0.63
0.16
1.00
0.20
1.50
0.25
1.60
0.31
2.00
0.80
2.50
1.20
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
0.6 –––R60E
0.63 –––R63E

16.0 –––16RE
20.0 –––20RE
100.0 –––100E


*Substitute “C” in ^{ = Standard values; check availability}
prefix with “E” for
using the worldwide inventory
adjustable versions. ^{search at www.ohmite.com}
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax [phone] • www.ohmite.com • [e-mail] 35