Power
Rating at
70°C
W ± 1 D ± 1 L ± 1 H ± 5
Resistance
Range
Remark :
T
F
(°C) =
Rated Functioning Temperature
Ir (A) = Rated Current
Ur (V) = Rated Voltage
+0.02
d1 d2 ± 0.05
-0.05
CEMENT THERMAL FUSIBLE RESISTORS
Derating Curve:
Type
FWI 2W 0.5Ω ~ 470Ω 9 10 25 36 0.6 0.75
Temperature coefficient
≥
20
Ω
±
350PPM/°C; <20
Ω
± 400PPM/°C Max.
Short-time overload
∆
R/R
≤
±(5.0% + 0.05
Ω
) Max.,
with no evidence of
mechanical damage.
Terminal strength
No evidence of mechanical damage.
Resistance
to soldering heat
∆
R/R
≤
±(1.0% + 0.05
Ω
) Max.,
with no evidence of
mechanical damage.
Solderability
Min. 95% coverage
Load life in humidity
∆
R/R
≤
±(5.0% + 0.05
Ω
) Max.,
with no evidence of
mechanical damage.
Load life
∆
R/R
≤
±(5.0% + 0.05
Ω
) Max.,
with no evidence of
mechanical damage.
THERMAL FUSING POWER FILM FIXED RESISTORS
Dimension (mm):
Type L
(Max.)
W
(Min.)
W1
(Min.)
H
(Min.)
Ød1
± 0.02
Ød2
± 0.02
TFRC 17 17 5 7.5 0.7 1.0
Type
Power
Rating
at 70°C
Resistance
Range
T.C.R.
(PPM/°C)
TF
(°C)
Ir
(A)
Ur
(V)
TFRC 2W 360Ω+360Ω ± 350 91 10 250
Derating curve
*** other value can be supplied on a case to case basis.
* More details, please see pa
g
es 7
8
-7
9
.
Page 45
2007 - 2008
THERMAL FUSING WIRE-WOUND FIXED RESISTORS
T F R 0 1 W J W 4 7 J B 0 0
Tolerance:
J =
±5%
K = ±10%
Temperature coefficient ± 400 PPM
/°C
Short time overload
R/R
± (2% + 0.05) Max. with no evidence of mechanical damage.
Insulation Resistance 20M Max., with no evidence of mechanical damage.
Dielectric withstanding voltage No evidence of flashover, mechanical damage, arcing or insulation break down.
Terminal strength with no evidence of mechanical damage.
Humidity (steady state)
R/R
± (3% + 0.05) Max. with no evidence of mechanical damage.
Load life in humidity
R/R
± (5% + 0.05) Max. with no evidence of mechanical damage.
Load life
R/R
± (5% + 0.05) Max. with no evidence of mechanical damage.
* More details, please see pa
g
es 7
8
-7
9
.
Ordering Procedure: (Ex.: TFR 1W 5%, 4
Ω7
, B/B)
Type Power
Rating
at 70°C
Resistance
Range TF
(°C) TH / TC
(°C) TM
(°C) Ir
(A) Ur
(V)
TFR 1W 4
7
± 5%
130 102 180 2 250
D L H
(Min.) h1
(Min.) d ± 0.02 Current
rating
5.5 ± 0.5 14 ± 1 12 3.5 0.53 2A
5.5 + 1
- 0.5 11(Max.) 12 3.5 0.53 1A
Product Type:
TFR0 = TFR
FWI0 = FWI
TFRC = TFRC Wattage:
1W = 1W
2W = 2W
Resistance Value:
E-24 series: the
1
st
digit to denote
product type:
W = Wire wound type
P = Power film type
The
2
nd
and
3
rd
digits are for the
significant figures of the resistance
and the
4
th
digit denotes number of
zeros:
“J” ~ 0.1,
“K” ~ 0.01
Ex.
4.7
Ω
~
47J, 4.7KΩ
~
472
Packing Quantity:
0 = for Bulk/Box packing
Packing Type:
B = Bulk in poly - bag
Special Feature:
0 = Standard product
1 = Non-Inductive
* More explanation on part no, please see details on pages 80-81.
Remark: TH / TC
(°C) = Holding Temperature
T
M
(°C) = Max. Temperature Limit
T
F
(°C) =
Rated Functioning Temperature
Ir (A) = Rated Current
Ur (V) = Rated Voltage
Page 46
2007 - 2008
