Series BWF
Insulated Wirewound Resistors, moulded
flame retardant, failsafe
Specifications
Type
Style
Power rating P
70
Resistance range
E-Series
Tolerances
Temperature coefficient
max. cont. work. voltage
Insulation voltage (1min.)
Insulation resistance
Derating linear
Climatic category
Temperature range
Thermal resistance
Failure rate
(Total, ϑ
max., 60% conf. lev.)
o
Endurance
(P
, 1000h)
70
Damp heat, steady state
o
(40
C, 93% r.h., 56d)
Climatic sequence
Terminal strength
Terminal tensile strength
Resistance to soldering heat
o
(260
C, 10s)
Solderability
Marking
VITROHM PORTUGUESA, Lda. - Est.Nacional 249-4, Trajouce - 2765-653 S. Domingos de Rana - PORTUGAL
Tel: + 351 214 457 700 -Fax: + 351 214 457 755 -Germany Sales Tel: + 0049 4121 870 103 - e-mail:vitrohm.support@yageo.com - www.vitrohm.com
BWF237-0
0411
W
0,75 (P
= 1,0)
50
Ω
0R1 ... 1K
%
10
-6
* K
-1
- 400 ... + 1000, see table next page
V
RMS
V
700
RMS
Ω
o
C
o
C
KW
-1
140
10
-9
* h
-1
appr. 100, depends on value
∆R
[
]
%
± 5,0 average
R
∆R
[
]
%
R
∆R
[
]
%
R
∆R
[
]
%
R
N
∆R
[
]
%
R
s
2,5 Flowtime, solderglobule test, IEC 60068-2-20-T
DIN-IEC-colour code, 5 bands
(5th band (blue) for failsafe version)
BWF236-0
0614
1,5 (P
= 2,0)
25
0R1 ... 1K
E 24, E 12
± 5, ± 10
√
P
· R
70
1000
4
> 10
M
70 ... 175 (0W)
55/175/56
- 55 ... 175
80
± 10,0 average
± 2,0
± 2,0
± 1
40
± 0,2 typ.
Revision 200807