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TFS Series0 pages
thick film
Axial
surge
high energy
TFS Series
Surge Capable
Thick Film Non Inductive
F e at u r e s
•tAppropriate for medical surge protection applications
•tIdeal to replace standard carbon composition resistors
•tCustom dimensions, values, tolerances and characteristics available
The TFS Series has been specifically developed to absorb large
amounts of energy by efficient use of its compact mass. Ideal
for medical surge protection applications, these thick film resistors offer non-inductive performance in an axial package.
Uses include power supply conversion, electron microscopes,
X-ray systems, high-resolution CRT displays, and geophysical
instrument related products.
S e r i e s S p e c i f i c at i o n s
Type
TFSA
TFSB
TFSC
TFSD
TFSE
TFSF
U (KV)
3
3.5
4
7
7
11
Energy* (J)
6
9
11
33
44
55
Power (W)
0.5
0.5
0.75
1
1.5
2
*Published energy rating is for 10ms pulse. For shorter pulses energy rating has to be derated according to Max. Individual Pulse Rating chart and
Single Pulse Energy Rating considerations.
characteristics
Notes
Resistive Element Thick Film
Encapsulation Screen Printed Glass
• Momentary overload capability is 5 times rated power for 1 second or 2 times
rated power for 5 seconds. Always verify designs with pulse and surge conditions through thorough testing of the design at maximum operating temperature and maximum pulse loading (or some margin above maximum pulse
loading).
Resistance Value 100Ω up to 100KΩ
Temperature Coefficient 100ppm/°C
Tolerance 1%, 2%, 5%, 10%
• Damage to the resistor by excessive pulse loading is generally indicated by an
increasing resistance of the resistor.
Operating Temperature -55°C to +200°C
• Energy ratings are based on single pulses (at least 1 minute between pulses).
Test VDE 0750 (Pulse Duration 10 msec)
• For multiple pulse applications the energy pulse rating should be reduced and
the average power should not exceed the nominal power rating of the selected
model.
• See Single Pulse Energy section for more information
dimensions
mm
C
A
Type
B
TFSA
Watts
A
B
C
H
E
0.5
9
5.5
10
0.7
1.1
0.25mm
H
E
0.5
11
5.5
10
0.7
1.1
TFSC
0.75
13
5.5
10
0.7
1.1
TFSD
1
21
8
10
0.9
1.3
TFSE
0.50mm
TFSB
1.5
21
10.5
10
0.9
1.3
TFSF
2
26
10.5
10
0.9
1.3
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