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Power Precison Resistors

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Technology

Wirewound

Metal Foil

Metal Foil

Metal Foil

Metal Foil

Thick Film

Power

up to 250W

up to 50W

up to 50W

up to 2000W

up to 80W

up to 150W

Resistance

0.01 Ω to 250K Ω

0.1 Ω to 500 Ω

0.2 Ω to 500 Ω

0.001 Ω to 500 Ω

0.001 Ω to 100 Ω

0.5 Ω to 300K Ω

Tolerance

to � 0.01%

to � 0.01%

to � 0.01%

to � 0.1%

to � 0.5%

� 1%

TCR

to 20ppm/�C

to 1ppm/�C

to 1ppm/�C

to 15ppm/�C

10ppm/�C
(over +20 to +40�C)

to 100ppm/�C

Part Number

UAL

UNR 4-4020

UNR 4-3425

FHR 4-8xxx

FHR T238

Kxxx-T238

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Technology

Metal Foil

Metal Foil

Thick Film

Thick Film

Metal Foil

Metal Foil

Power

up to 50W

up to 30W

up to 50W

up to 100W

up to 15W

up to 15W

Resistance

0.001 Ω to 100 Ω

0.002 Ω to 50 Ω

0.1Ω to 50K Ω

0.1 Ω to 100K Ω

0.01 Ω to 50 Ω

0.01 Ω to 50 Ω

Tolerance

to � 0.1%

to � 0.1%

to � 1%

to � 1%

to � 0.1%

to � 0.1%

TCR

to 15ppm/�C

to 15ppm/�C

to 100ppm/�C

to 100ppm/�C

to 15ppm/�C

to 15ppm/�C

Part Number

FHR 4-3825

FPR2-T218

KPR 2-T218

KHR 2-T218

FPR 2-T220

FPR 2-T221

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Technology

Metal Foil

Thick Film

Metal Foil

Thick Film

Thick Film

Metal Foil

Power

up to 15W

up to 30W

up to 250W

up to 375W

up to 30W

up to 15W

Resistance

0.01 Ω to 50 Ω

0.1 Ω to 100K Ω

0.001 Ω to 100 Ω

0.5 Ω to 1M Ω

0.1 Ω to 100K Ω

0.01 Ω to 50 Ω

Tolerance

to � 0.1%

to � 1%

to � 0.5%

to � 5%

to � 1%

to � 0.1%

TCR

to 15ppm/�C

to 100ppm/�C

to 15ppm/�C

to 100ppm/�C

to 100ppm/�C

to 15ppm/�C

Part Number

FPS 2-T220

NPR 2-T220

FHR 2-6760

KHR 2-6760

NPS 2-T220

FPS 2-T220

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RPF

RPG

RPH

RPJ

HS

Technology

Wirewound

Metal Film

Metal Film

Metal Film

Metal Film

Thick Film

Power

up to 225W

up to 250W

up to 300W

up to 500W

up to 200W

up to 17W

Resistance

to 100K  Ω

1.0 Ω to 20K Ω

1.0 Ω to 1K Ω

0.1 Ω to 1K Ω

0.1 Ω to 1K Ω

1M Ω to 100T Ω

Tolerance

to � 5%

to � 1%

to � 5%

to � 10%

to � 5%

to � 0.2%

TCR

to � 260ppm/�C

to � 50ppm/�C

to 100ppm/�C

to � 250ppm/�C

to 100ppm/�C

to � 20ppm/�C

Part Number

TSC & TVC

RPF

RPG

RPH

RPJ

HS

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HTE

PK

RF05

RIMS03

UD

UT03

Technology

Thick Film

Thick Film

Thick Film

Thick Film

Thick Film

Thick Film

Power

up to 17W

up to 22W

up to 300W

up to 300W

up to 50W

up to 200W

Resistance

200 Ω to 700 Ω

10 Ω to 20M Ω

2.0 Ω to 1M Ω

2.0 Ω to 2M Ω

0.1 Ω to 100T Ω

20 Ω to 10T Ω

Tolerance

to � 0.2%

to � 0.2%

to � 0.2%

to � 20%

to � 1%

to � 0.2%

TCR

to � 20ppm/�C

to � 50ppm/�C

to � 50ppm/�C

to � 250ppm/�C

to 100ppm/�C

to � 50ppm/�C

Part Number

HTE

PK

RF

RIMS

UD / HD

UT

Willow Technologies Ltd. Unit 3 Borers Yard, Borers Arms Road, Copthorne, West Sussex, RH10 3LH, UK

Tel: +44 (0) 1342 717102, Fax: +44 (0) 1342 717014, Email: sales@willow.co.uk