RH02520R00FE02 Dale / Vishay, RH02520R00FE02 Datasheet - Page 3

• Manufacturer Part Number: RH02520R00FE02
• Description: Resistor; Wirewound; Res 20 Ohms; Pwr-Rtg 25 W; Tol 1%; Lug; Alum Housed; Military
• Manufacturer: Dale / Vishay

Specifications of RH02520R00FE02

• Material, Element: Wirewound
• Package Type: Aluminum Housed
• Power, Rating: 25 W
• Resistance: 20 Ohms
• Special Features: Military
• Termination: Sn/Ag/Cu
• Tolerance: 1%
• Lead Free Status / Rohs Status: RoHS Compliant part

REDUCED HEAT SINK DERATING:
Derating is also required when recommended heat
sink area is reduced.
A = RH-5 and RH-10 size resistor
B = RH-25 size resistor
C = RH-50, RH-100 and RH-250 size resistor
RH, NH
Vishay Dale
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 = RH-5 and RH-10 size resistor, unmounted
B = RH-25 size resistor, unmounted
C = RH-50, RH-100 and RH-250 size resistor, unmounted
D = All types mounted to recommended aluminum heat sink
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124
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Dielectric Withstanding Voltage
Short Time Overload
Maximum Working Voltage
Insulation Resistance
Terminal Strength
Solderability
OperatingTemperature Range
RH-5 and RH-10:
RH-25:
RH-50:
RH-100 and RH-250:
Wirewound Resistors, Military, MIL-PRF-18546 Qualified,
Derating
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)
ppm/°C
UNIT
V
120
100
°C
Ω
lb
V
60
AC
-
-
40
20
80
Type RE, Aluminum Housed, Chassis Mount
-55 -50
0
For technical questions, contact [e-mail]
C
A
B
1000 for RH-5, RH-10 and RH-25, 2000 for RH-50, 4500 for RH-100 and RH-250
10,000 Megohm minimum dry, 1000 Megohm minimum after moisture test
0
± 100 for 0.1Ω to 0.99Ω, ± 50 for 1Ω to 9.9Ω, ± 20 for 10Ω and above
MIL-PRF-18546 Type - Meets requirements of ANSI J-STD-002
25
5 minimum for RH-5 and RH-10, 10 minimum for all others
Heat Sink Derating
100
90
80
70
60
50
40
30
20
10
50
0
0
RH RESISTOR CHARACTERISTICS
5 x rated power for 5 seconds
A
B
C
20
- 55/+ 250
(P X R)
D
AMBIENT TEMPERATURE IN
150
1/2
40
% OF RECOMMENDED HEAT SINK AREA
60
Document Number 30201
250
°
80
C
Revision 09-Sep-04
100