THERMAL FUSE RESISTORS, 1/2W to 60W
PERMANENT OR REPLACEABLE FUSE
5
R
TF
D 5%
C
Ω
R 0
Ω
1
RESISTORS CAPACITORS COILS DELAY LINES
3
TFV
RCD
Ω
5 %
100
TF SERIES
RoHS
Term.W is
RoHS
compliant
& 260°C
compatible
RCD
T
100
Ω
F05A
5%
Meets UL, FCC, REA, and EIA requirements
Fusing-to-operating current ratio as low as 1.25:1!
Fusing times can be custom tailored
Precision tolerance to ±0.1%, TC’s to 5ppm available
Available on exclusive
SWIFT
TM
delivery program
OPTIONS
Option X: Low inductance design
Option P: high pulse design (consult factory for assistance)
Option A: ceramic case with standoffs (standard on TFV)
Customized fuse time/temp, Hi-rel screening & burn-in,
increased V & W, aluminum-housed heat sink design, etc.
TF Series
1.0 [25.4] Min
RCD’s TF Series construction consists of a thermal fuse welded in
series with a resistor element. The assembly is potted inside a
ceramic case (model TFR fuse is mounted externally in order to
provide field-replaceability of the fuse). Under overload conditions, the
thermal fuse “senses” the temperature rise of the resistor element
and opens upon reaching a predetermined temperature. Devices can
be custom tailored to specific fault conditions and do not require the
large power overloads necessary with other fuse resistors to achieve
proper fusing. Thus, the TF Series offers great safety, since high
temperatures are not involved to achieve fusing. Typical applications
include telecom line cards, repeaters, trunk carrier systems, RFI
suppression, power supply, medical, and automotive circuits.
--
TFV Series
←
L
→
←
B→
TFR Series
2.45”
Max
L
↓
↓
E
↑
←
B
→
↑
C
--
C
↓
↑
Fuse is soldered
between the
resistor and metal
mounting bracket,
therefore easily
replaceable in field
.032”±.004
.400”
SCHEMATIC
↑
(standoffs apply
to Opt.A only, not
avail on TF02)
D
↓
→ ←
.200 ±.08
[5.08±2]
↓
.033”
→ ←
.150 [3.8]
min.
max.
.41”
.20”
.20”
.125”
min.
↑
.045” dia.
.032x.08” (3PL)
.41”
TFR5
Mounting
Layout
RCD
Type
1
TF01S
TF01
TF02
TF04
TF05
TF07
TFV2
TFV3
TFV5
TFV7
TFR5
1
Wattage
@ 25°C
2
1W
1W
2W
4W
5W
7W
2W
3W
5W
7W
5W
Min/Max
Fusing
R an g e
3
3W to 100W
5W to 100W
7W to 200W
10W to 400W
15W to 500W
20W to 700W
4W to 200W
6W to 300W
8W to 500W
12W to 700W
7W to 500W
Voltage
Rating
4
40V
50V
100V
150V
200V
250V
100V
150V
200V
250V
200V
Resistance
Range (Std.)
5
.05
Ω
to 1K
Ω
.05
Ω
to 4K
Ω
.05
Ω
to 10K
.05
Ω
to 25K
.05
Ω
to 40K
.05
Ω
to 60K
.05
Ω
to 10K
.05
Ω
to 20K
.05
Ω
to 25K
.05
Ω
to 40K
.05
Ω
to 40K
L±.032 [.81]
.70 [17.8]
.88 [22.4]
.95 [24.1]
1.39 [35.3]
1.88 [47.8]
1.88 [47.8]
.435 [11.0]
.515 [13.0]
.500 [12.7]
.500 [12.7]
B±.032 [.81]
C±.032 [.81]
D
6
±.032 [.81]
.06 [1.5]
.06 [1.5]
N/A
.12 [3.0]
.12 [3.0]
.12 [3.0]
N/A
N/A
N/A
N/A
.26 [6.6]
.26 [6.6]
.31 [7.9]
.31 [7.9]
.28 [7.1]
.28 [7.1]
.38 [9.7]
.35 [8.9]
.38 [9.7]
.38 [9.7]
.50 [12.7]
.50 [12.7]
.30 [7.6]
.80 [20.3]
.40 [10]
1.00 [25.4]
.40 [10]
1.52 [38.6]
.40 [10]
2.02 [51.3]
See illustration above
Other sizes available from 1/2W to 60W.
2
Wattage rating based on 167°C fuse, deduct 24% for 133°C and 40% for 110°C.
3
Expanded range available
4
Maximum resistor working voltage determined by
E = ( PR)
1/2
, E not exceed value listed
5
Resistance range from .005Ω to 1MΩ available.
6
Opt.A standoffs are avalable on TF1/2 - TF07 (not available on TF02)
SPECIFICATIONS
(133°C fuse design)
Tolerance
Temperature Coefficient
Dielectric Strength
Insulation Resistance
Operating Temp. Range
Derating
Fuse Rating (±5°C)
Standard FuseTime: TFV
Series shall fuse within
30S at 20x rated power,
TF and TFR shall fuse
within 30S@30x rated W.
Refer to chart for approx.
fuse curves (custom fusing
available).
0.1% to 10% available
±100ppm standard, T.C.'s to ±5ppm/ avail.
500 VAC
10,000 megohms min. (dry)
-55 to +120°C ( up to 225°C avail.)
1%/°C above 20°C
Standard = 133°C 2A 250V. Other popular
models are 110°C, 167°,C and 187°C
(72°C to +240°C available, 0.5A to 25A)
100W
P/N DESIGNATION:
RCD Type
Options:
X, P, A (leave blank if standard)
TFV3
- 102 - J B
W
Optional Fuse:
“110C”= 110°C, “167C”=167°C,
“187C”=187°C, etc. Leave blank for standard 133°C
Resis. Code 1% & tighter tols:
3 signif. digits & multiplier,
e.g. R100= 0.1Ω, 1R00= 1Ω,1000= 100Ω, 1001= 1KΩ.
2%- 5%:
2digits &multiplier R10= .1Ω, 1R0=1Ω,100=10Ω, 102=1K
T
olerance:
J=5%, G=2%, F=1%, D=.5%, C=.25%, B=.1%
Packaging
:
B = Bulk (standard)
Optional TC:
5= 5ppm, 10 = 10ppm, 20 = 20ppm, 30 = 30ppm,
50 = 50ppm (leave blank if std)
Termination:
W = Lead-free, Q = Tin/Lead (leave blank if either is acceptable)
Power (Watts)
50W
30W
10W
3W
TF04
TFR5
TF02, TFV5
TFV3
TFV2
10
20 30 50 100 200 300 500
Approx. Fusing Time (Seconds)
If a custom model is required, please advise the continuous wattage
rating, ambient temperature, fusing wattage or current, min/max blow
time, resistance value & tolerance, maximum size, pulse voltage &
waveform, and a general description of the application.
RCD Components Inc,
520 E.Industrial Park Dr, Manchester, NH, USA 03109
rcdcomponents.com
Tel: 603
-
669
-
0054 Fax: 603
-
669
-
5455 Email:sales@rcdcomponents.com
FA099B
Sale of this product is in accordance with GF-061. Specifications subject to change without notice.
82
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