Ambient Temperature (°C)

Maximum

Loadatratedpower(1000hrsat25°Cand70ºC)

ΔR%

5

Deratingfromratedpower

Zeroat275ºC(seegraph)

Shorttermoverload(5xratedpower)

ΔR%

5+0.05Ω

Dampheatsteadystate(56days,40°C,≥90%RH)

ΔR%

5+0.05Ω

Temperaturerapidchange(5cycles-55ºCto+155ºC)

ΔR%

2+0.05Ω

Resistancetosolderheat

ΔR%

1+0.05Ω

VoltageProof(1kVfor60s)

Noflashover,mechanicaldamage,arcingorbreakdown

Solderability

Min. 95% coverage

Name

MainMaterial

1

Rod

Al

2

FillingMaterial

SiO

2

3

CeramicCase

Al

4

Terminal

Steel(tinplated)

5

Bracket

Steel

6

WireElement

ResistanceAlloy

Construction

Ahighpurityceramicrod,withforcefitendcapsontowhichiswoundawireelement.Theelementisfittedintoaceramiccasewith

fireproofinsulationcement.Theterminalmaterialistinplatedsteel.

PerformanceData

Body Temperature Rise

0

50

100

150

200

250

300

350

0

10

20

30

40

50

Power (W)

10W

15W

20W

30W

40W

50W

Temperature Rise

Derating Curve

0

20

40

60

80

100

050100

150200

250300

Ambient Temperature (°C)

10W

15W-50W

Wirewound Power

Radial Terminal Resistor

WPRT Series

06.18

General Note

TT Electronics reserves the right to make changes in product specification without notice or liability.

All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.

© TT Electronics plc

www.ttelectronics.com/resistors

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