RDEF, RDSF

www.vishay.com

Vishay Milwaukee

Revision: 04-Mar-16

3

Document Number: 31829

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

METRIC OPTIONS AVAILABLE

Metric Hardware on Terminal Lugs

Use terminal designation “1” example: RDEF03001R000K1B00

Metric Mounting Hardware

Vertical mount: use special designation “VM” example: RDEF03001R000K1BVM

1 high bracket: use special designation “1A” example: RDEF03001R000K1B1M

2 high bracket: use special designation “2A” example: RDEF03001R000K1B2M

3 high bracket: use special designation “3A” example: RDEF03001R000K1B3M

4 high bracket: use special designation “4A” example: RDEF03001R000K1B4M

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

RESISTOR CHARACTERISTICS

Power rating

W

8 to 1150

Resistance range



0.12 to 227K

Resistance tolerance

%

5 for above 1

, 10 below 1 

TCR

ppm/°C

± 400, ± 180, ± 130, ± 20 (varies by wattage and resistance)

Operating temperature

°C

-55 to +350

Temperature rise

°C

325 above an ambient of 25 °C

Maximum altitude

f.a.s.l. (m.a.s.l.)

derate above 4921 f.a.s.l. (1500 m.a.s.l.)

Short-term overload (surge)

10 x rated power for 5 s

Surge windings

available

Maximum working voltage

Insulation resistance



1M

Dielectric voltage

up to 1500 (upon request)

Creepage

inch (mm)

minimum 0.125 (3.175), typical (varies by wattage)

Terminal sleeves

n/a

Inductance

μH

0.2 to 10 300 (varies by wattage and resistance)

Non-inductive winding

available

Terminal strength

lb

10

Electrical or mechanical customization

DERATING CURVE

MATERIAL SPECIFICATIONS

Element

copper-nickel, nickel-chrome, iron-chrome-aluminum

Core

cordierite, steatite

Coating

special high temperature silicone or vitreous enamel

Standard terminals

nickel-iron

Part marking

value, date code, MRC

0

AMBIENT TEMPERATURE IN °C

25

120

0

100

80

60

40

20

50

100

150

200

250

300

350