NH250R1000FE01 Vishay, NH250R1000FE01 Datasheet - Page 3

• Manufacturer Part Number: NH250R1000FE01
• Description: ALUMINUM HOUSED RESISTOR
• Manufacturer: Vishay
• Series: NHr
• Type: Wirewoundr

Specifications of NH250R1000FE01

• Resistance (ohms): 0.1
• Power (watts): 250W
• Composition: Wirewound
• Features: Non-Inductive
• Temperature Coefficient: ±20ppm/°C
• Tolerance: ±1%
• Coating, Housing Type: Aluminum Housed
• Mounting Feature: Flanges
• Size / Dimension: 4.500" L x 3.000" W (114.30mm x 76.20mm)
• Height: 2.188" (55.58mm)
• Lead Style: Solder Lugs
• Package / Case: Axial, Box
• Power Rating(s): 250W
• Tolerance (+ Or -): 1%
• Mounting Style: Flange
• Construction: Chassis
• Operating Temp Range: -55C to 250C
• Case Style: Aluminum Housed
• Termination Style: Axial
• Military Standard: MIL-PRF-18546
• Failure Rate: Not Required
• Product Length (mm): 177.8mm
• Product Height (mm): 55.58mm
• Product Depth (mm): 76.2mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NH2500R100FE01; NH2500R100FE01; NH250R100FE01; NH250R100FE01; Q3683361

POWER RATING
Vishay RH resistor wattage ratings are based on mounting to the following heat sink:
AMBIENT TEMPERATURE DERATING
Derating is required for ambient temperatures above 25 °C, see the following graph.
Curves A, B, C apply to operation of unmounted resistors. Curve D applies to all types when mounted to specified heat sink.
A = RH005 and RH010 size resistor, unmounted
B = RH025 size resistor, unmounted
C = RH050, RH100 and RH250 size resistor, unmounted
D = All types mounted to recommended aluminum heat sink
REDUCED HEAT SINK DERATING
Derating is also required when recommended heat sink area is reduced.
A = RH005 and RH010 size resistor
B = RH025 size resistor
C = RH050, RH100 and RH250 size resistor
Document Number: 30201
Revision: 02-Mar-11
FREE AIR POWER RATING
GLOBAL
MODEL
W at 25 °C
RH005 and RH010:
RH025:
RH050:
RH100 and RH250:
NH005
RH005
3.75
4" x 6" x 2" x 0.040" thick aluminum chassis (129 sq. in. surface area)
5" x 7" x 2" x 0.040" thick aluminum chassis (167 sq. in. surface area)
12" x 12" x 0.059" thick aluminum panel (291 sq. in. surface area)
12" x 12" x 0.125" thick aluminum panel (294 sq. in. surface area)
120
100
100
80
60
40
20
90
80
70
60
50
40
30
20
10
- 55 - 50
0
0
0
For technical questions, contact:
Wirewound Resistors, Industrial Power,
C
A
B
Aluminum Housed, Chassis Mount
RH010
NH010
A
6.25
B
0
C
20
25
50
40
RH025
NH025
12.5
% OF RECOMMENDED HEAT SINK AREA
[e-mail]
D
AMBIENT TEMPERATURE IN °C
60
150
RH050
NH050
20
80
250
100
RH100
NH100
40
Vishay Dale
www.vishay.com
RH, NH
RH250
NH250
100
3