Datasheet

Features
• Aluminium housing for direct heat sink attachment
• Excellent heat transfer and small dimensions
• Good electrical stability, reliability and mechanical rigidity
• Values from R10 to 27K
• RoHS compliant
• Custom terminations, mounting arrangements possible
Wirewound Resistors in
Aluminium Housing
General Series Characteristics
Characteristic Condition Compliance
Tolerance
(Tighter tolerance available on request)
For values less than 1 Ω
For values greater than 1 Ω
± 5%
± 0.25 to ± 5%
Temperature co-efficient
(Lower TCR available on request)
For values less than 100 Ω For
values greater than 100 Ω
60 ppm / °C
30 ppm / °C
Insulation resistance Dry / Normal 10GΩ min
Change in resistance
- short time overload
- shelf life
10x rated voltage for 5 sec
earsAfter 3 y
± 0.5%
< ± 1%
Incombustibility 16x rated wattage for 5 sec No flame
From - 25°C to 250 °C
Operating temperature
Series
Power rating
on standard
heat sink
@ 25 °C
Power ra-
ting with no
heat sink
@ 25°C
Resistance
range
Limiting
element
voltage
(DC / AC rms)
Dielectric
strength
(AC peak)
Weight
approx.
(g)
Standard heat sink
Area
(cm
2
)
Thickness
(mm)
RND 15525 25 12.5 R10 - 27K 550 2500 15 550 1
RND 15550 50 20 R10 - 10K 1250 2500 30 550 1
RND 155100 100 50 R10 - 10K 1900 5000 115 1000 3
RND 155200 200 50 R10 - 1K 1900 5000 475 3750 3
RND 155300 300 75 R10 - 1K 2500 5000 700 5800 3
Power Derating Curve
Electrical Specifications
Global Part Number Information
Example: RND 15525 1K2 F
RND 15525
RND 15525 = 25 W
RND 15550 = 50 W
RND 155100 = 100 W
RND 155200 = 200 W
RND 155300 = 300 W
1K2
Resistance
F
Tolerance:
F=1%
J=5%
Distrelec Schweiz AG, Grabenstrasse 6, 8606 Nänikon, Switzerland, T [phone], [e-mail], distrelec.com