Corrib
®
Fixed and Adjustable
Vitreous Enamel Power
280 Series
Corrib
®
resistors are ideal for applications involving
high currents at very low resistance 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 applications.
Special order units are available to accommodate up
to 1500 watts.
Corribs
®
are manufactured with corrugated resis-
tive wire. To accelerate cooling, the wire is securely
fused to the ceramic core by the protective vitreous
enamel coating to improve durability. Corrib resis-
tors are hollow-core units which can be securely
fastened to chassis surfaces with thru bolts and
brackets.
chaRacteRiSticS
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 with adjustable 300 watt models. Part
No. 1974-A or 1974-B
Resistance
Max. 63Ω for 300W version
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
Dielectric with-
standing voltage
To calculate
max. amps
±400 ppm/°C
1000 VAC measured from terminal to mounting
bracket
use the formula √P/R
F e at u R e S
• Also available in Centohm or Silicone coating.
Consult Ohmite.
• Ribbed construction aids in rapid cooling.
• Designed for equipment requiring low resistance
loads at low ohmic values and high current capac-
ity.
• Especially constructed for motor starting, dynamic
braking, etc.
• RoHS compliant product available. Add “E” suffix to
part number to specify.
ReSiStoR haRdwaRe
Thru Bolts Mounting Brackets for
Lugs for 300 Watt
300 Watt Corrib
Adjustable Corrib
Includes two each bracket, bolt,
Part No.
Res. Part No.
washers (centering, mica, lock) and
1974-A
0.40
1974-B
1
/
16
wire
1
/
8
wire
0.50
nut. Note: Single unit mounting
0.63
contains one each bolt and nut; two
1.00
1.50
each all washers.
Part No.
Slotted
Elongated
6110-81/2
-
-
-
6126-P-81/2
6127-P-81/2
6128-P-81/2
6129-P-81/2
No. of
Resistors
1
2
3
4
Moun.
Derat.
%
100%
83%
80%
80%
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
Res.
0.10
0.12
0.16
0.20
0.25
0.31
0.80
1.20
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
115
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