User Manual

www.vishay.com For technical questions, contact: [e-mail] Document Number: 50017
63 Revision: 23-Oct-06
RWST
Vishay Sfernice
Fixed Wirewound High Power Vitreous Resistors
Electrical Traction Model
POWER RATING CHART
TEMPERATURE RISE
PACKAGING
Box: Fixed quantity depending on size and connections.
MARKING
SFERNICE trademark, model, style, nominal resistance (in Ω), tolerance (in %), manufacturing date.
ORDERING INFORMATION
RWST 25 × 138 B 56U ± 5 % B06 e
MODEL STYLE NON-INDUCTIVE
BOBINAGE
Optional
SPECIAL
DESIGN
Optional
CONNECTIONS OHMIC VALUE
Custom items are
subject to extra-charge
and min. order.
Please see price list.
TOLERANCE PACKAGING LEAD
(Pb)-FREE
SAP PART NUMBERING GUIDELINES
RWST 25138 B 56R0 J B06
MODEL STYLE CONNECTIONS OHMIC VALUE TOLERANCE PACKAGING
AMBIENT TEMPERATURE IN DEGREES CELSIUS
REWOP DETAR %
100
75
50
25
0
0 65 130 195 260 325 390 455
RATED POWER IN WATTS
C
°
NI ERUTAR
EP
MET
TOPS T
OH
400
300
200
100
0
10 100 1000
RWST 25 × 138
RWST 25 × 168
RWST 30 × 250
RWST 40 × 370
RWST 50 × 373