Download PDFRES-280 OHMITE
Document overview
- PDF pages: 2
Technical content
Page 1
280 Series
Corrib® Fixed and Adjustable
Vitreous Enamel Power
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.
c h a r a c t e r i s t i c s
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
±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
- 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.
R e s i s t o r h a r d w a r e
Thru Bolts Mounting Brackets for Lugs for 300 Watt
300 Watt Corrib
Adjustable Corrib
Includes two each bracket, bolt,
Part No. Res. Part No. Res.
washers (centering, mica, lock) and 1974-A 0.40 1974-B 0.10
nut. Note: Single unit mounting
1/16 wire 0.50 1/8 wire 0.12 0.63
0.16
contains one each bolt and nut; two
1.00
0.20
each all washers.
1.50
0.25
1.60
0.31
Moun.
2.00
0.80
Part No.
No. of Derat.
2.50
1.20
Slotted Elongated Resistors %
3.10
6110-81/2 6126-P-81/2
1 100%
4.00 5.00
- 6127-P-81/2
2 83%
6.30 8.00
- 6128-P-81/2
3 80%
10.00
- 6129-P-81/2
4 80%
12.00 16.00 20.00 25.00 30.00 48.00 50.00
(continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
Page 2
280 Series
Corrib® Fixed and Adjustable
Vitreous Enamel Power
d i m e n s i o n s
D
L
Core and Terminal Selection for Made to Order Type
Code
Free Air
for
Core Dimensions
Term.
Wattage
Core Ohms
Rating D: OD
C: ID L: Length
Dia. Min. Max.Type
C
Code
Free Air
for
Core Dimensions
Term.
Wattage
Core Ohms
Rating D: OD
C: ID L: Length
Dia. Min. Max. Type
o r d e r i n g i n f o r m at i o n
Standard
Made-to-order
Coating Blank = Vitreous
RoHS Compliant
C = Centohm S = Silicone
Series
Series Wattage Tolerance Ohms
230 = Adjustable
K = 10% example: C = Fixed
280 = Fixed
1R0 = 1Ω
E = Adjustable
480 = Silicone fixed
250 = 250Ω
680 = Centohm fixed
1K0 = 1,000Ω 25K = 25,000Ω 25K5 = 25,500Ω
See website for custom core info
Wattage &
Terminal Type Ohms
Tolerance
Core Code
See “Resistor Example:
F = 1%
Terminals for R0200 = 0.02 7 H = 3%
See “Core and Terminal Selection” Tubular Cores” R2000 = 0.2 7 J = 5%
2R500 = 2.5 7 K = 10% (std.) 10R00 = 10 7
Standard part numbers for 280 series
C300KR10E
C300K2R0E E300K10RE E300K6R3E
C300KR12E
C300K2R5E E300K12RE E300K8R0E
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
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com