FSTL, FSTS, FSWL

www.vishay.com

Vishay Huntington

Revision: 02-Sep-16

2

Document Number: 31839

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

MATERIAL SPECIFICATIONS

Element: copper-nickel alloy or nickel-chrome alloy,

depending on resistance value

Core: ceramic, steatite

Coating: special high temperature silicone

Standard Terminals: tinned alloy 42

Terminal Bands: alloy 42

Part Marking: HEI, model, wattage, value, tolerance, date

code

NON-INDUCTIVE

Models of equivalent physical and electrical specifications

are available with non-inductive (Ayrton-Perry) winding.

They are identified by adding the letters “NI” to the end of

the part number in the special section. For non-inductive

models the maximum resistance values are lower.

GLOBAL PART NUMBER INFORMATION

GLOBAL MODEL

(6 digits)

TERMINAL

DESIGNATION

(2 digits)

TERMINAL

FINISH

(1 digit)

VALUE

(5 digits)

TOLERANCE

(1 digit)

PACKAGING CODE

(1 digit)

SPECIAL

(up to 2 digits)

(see Standard

Electrical

Specifications

Global Model

column for

options)

A1

A2

R1

R2

E = lead

(Pb)-free

R = decimal

K = thousand

1R500 = 1.5



1K500 = 1.5 k



J = ± 5 %

K = ± 10 %

E = lead (Pb)-free

bulk pack

FSTL/FSWL products

to be lead (PB)-free

foam packed.

(dash number)

from 1 to 99 as

applicable

CT = center tap

NI = non-inductive

92 = 203 or 209 style

push-in bracket

as applicable

Historical Part Number example: FSTL-5-25-5 %

FSTL-5

25



5 %

HISTORICAL MODEL

RESISTANCE VALUE

TOLERANCE

SPECIAL

DERATING

- 65 - 50

0

50

150

250

350

AMBIENT TEMPERATURE IN °C

120

100

80

60

40

20

0

25

ST

L

0

5R2

E2

5

R

0

0

F

J

E