280 Series
Corrib Fixed and Adjustable
Vitreous Enamel Power
Corrib resistors are ideal for applications involving
high currents at very low resistance valuesas low
as 0.1 for the 300 Watt unit. These large, heavy-
FeatuReS
duty resistors are designed to withstand frequent
Also available in Centohm or Silicone coating.
start-stop cycles characteristic of motor starting,
Consult Ohmite.
dynamic braking and other similar applications.
Special order units are available to accommodate up
Ribbed construction aids in rapid cooling.
to 1500 watts.
Designed for equipment requiring low resistance
Corribs are manufactured with corrugated resis-
loads at low ohmic values and high current capac-
tive wire. To accelerate cooling, the wire is securely
ity.
fused to the ceramic core by the protective vitreous
Especially constructed for motor starting, dynamic
enamel coating to improve durability. Corrib resis-
braking, etc.
tors are hollow-core units which can be securely
fastened to chassis surfaces with thru bolts and
RoHS compliant product available. Add E suffix to
brackets.
part number to specify.
chaRacteRiSticS ReSiStoR haRdwaRe
Thru Bolts Mounting Brackets for Lugs for 300 Watt
Coating Lead free vitreous enamel except for extreme
300 Watt Corrib Adjustable Corrib
low resistance 35 watt models, and very large
models (750 watts and up), which are supplied
Includes two each bracket, bolt,
Part No. Res. Part No. Res.
in Silicone Ceramic
washers (centering, mica, lock) and
1974-A 0.40 1974-B 0.10
1 1
/16 wire 0.50 /8 wire 0.12
nut. Note: Single unit mounting
Core Tubular Ceramic
0.63 0.16
contains one each bolt and nut; two
1.00 0.20
Terminals Tinned lug with hole. RoHS solder composition
1.50 0.25
each all washers.
1.60 0.31
is 96% Sn, 3.5% Ag, 0.5% Cu
Moun.
2.00 0.80
Part No. No. of Derat.
2.50 1.20
Adjustable Lug Supplied with adjustable 300 watt models. Part Slotted Elongated Resistors %
3.10
No. 1974-A or 1974-B
6110-81/2 6126-P-81/2 1 100% 4.00
5.00
- 6127-P-81/2 2 83%
Resistance Max. 63 for 300W version 6.30
8.00
- 6128-P-81/2 3 80%
10.00
Tolerance 10% (K)
- 6129-P-81/2 4 80%
12.00
16.00
Power rating Based on 25C free air rating
20.00
25.00
Derating Linearly from 100% @ +25C to 0% @ +400C
30.00
48.00
10 times rated wattage for 5 seconds 50.00
Overload
Temperature 400 ppm/C
coefficient
Dielectric with- 1000 VAC measured from terminal to mounting
standing voltage bracket
To calculate use the formula P/R
max. amps
(continued)
1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com [email protected] 115280 Series
Corrib Fixed and Adjustable
Vitreous Enamel Power
dimenSionS
C
D
L
Core and Terminal Selection for Made to Order Type
Code Code
Free Air for Free Air for
Core Dimensions Core Dimensions
Term. Term.
Wattage Core Wattage Core
Ohms Ohms
Rating D: OD C: ID L: Length Dia. Min. Max. Type Rating D: OD C: ID L: Length Dia. Min. Max. Type
1500 2.50 1.75 20.0 (508.00mm) S 0.56 358 45 315 1.00 0.625 10.0 (254.00mm) N 0.11 67 45
1000 (63.5mm) (44.45mm) 15.0 (381.00mm) S 0.41 258 215 (25.40mm) (15.88mm) 7.0 (177.60mm) N 0.068 43
750 12.0 (304.80mm) S 0.31 198 190 6.0 (152.40mm) N 0.056 35
380 6.0 (152.40mm) S 0.13 78 150 5.0 (127.00mm) N 0.043 27
125 4.0 (101.60mm) N 0.031 19
550 1.625 1.125 11.75 (298.45mm) R 0.21 133 45
500 (41.28mm) (28.58mm) 10.50 (266.70mm) R 0.19 117 180 0.75 0.50 6.5 (165.10mm) M 0.031 29 45
400 8.5 (215.90mm) R 0.14 91 160 (19.05mm) (12.70mm) 6.0 (152.40mm) M 0.038 26
140 5.0 (127.00mm) M 0.028 20
270 1.50 1.125 5.0 (127.00mm) Q 0.065 41 45
105 4.0 (101.60mm) M 0.020 14
(38.10mm) (28.58mm)
100 3.5 (88.90mm) M 0.021 11
395 1.125 0.75 11.25 (285.75mm) P 0.14 87 45
135 0.563 0.313 6.0 (152.40mm) K 0.028 21 46
375 (28.58mm) (19.05mm) 10.5 (266.70mm) P 0.13 80
110 (14.30mm) (7.95mm) 5.0 (127.00mm) K 0.029 16
300 8.5 (215.90mm) P 0.099 63
90 4.0 (101.60mm) K 0.021 12 46
220 6.0 (152.40mm) P 0.063 39
35 2.0 (50.80mm) K 0.0097 0.11
185 5.0 (127.00mm) P 0.05 30
155 4.25 (107.95mm) P 0.038 25 35 0.563 0.313 2.0 (50.80mm) K 0.12 5.6 40
140 4.0 (101.6mm) P 0.04 20 (14.30mm) (7.95mm)
oRdeRing inFoRmation
Standard Made-to-order
Coating
See website for
Blank =Vitreous
custom core info
C= Centohm
RoHS Compliant
S= Silicone
Series Wattage & Terminal Type Ohms Tolerance
Series Wattage Tolerance Ohms
C = Fixed K = 10% example: 230 = Adjustable Core Code See Resistor Example: F= 1%
E = Adjustable 1R0 = 1 280 = Fixed See Core and Terminals for R0200 = 0.02 7 H= 3%
250 = 250
480 = Silicone fixed Terminal Selection Tubular Cores R2000 = 0.2 7 J= 5%
1K0 = 1,000
680 = Centohm fixed 2R500 = 2.5 7 K= 10% (std.)
25K = 25,000
10R00 = 10 7
25K5 = 25,500
Standard part numbers for 280 series
NOTE: Wattages above
C300KR10E C300K2R0E E300K10RE E300K6R3E
750 watts come with
C300KR12E C300K2R5E E300K12RE E300K8R0E
silicone coating.
C300KR20E C300K3R1E E300K16RE E300KR10E
C300KR25E C300K4R0E E300K1R0E E300KR12E
C300KR31E C300K5R0E E300K1R6E E300KR16E
C300KR40E C300K6R3E E300K20RE E300KR20E
C300KR50E C300K8R0E E300K2R0E E300KR25E
C300KR63E C300K10RE E300K2R5E E300KR31E
C300K1R0E C300K12RE E300K3R1E E300KR40E
C300K1R2E C300K16RE E300K4R0E E300KR50E
C300K1R6E C300K20RE E300K5R0E E300KR63E
E300KR80E
116 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com [email protected]