FST Series
Thin Film Temperature Sensor
The FST series design positions the contact surfaces
on the side with the active measuring layer. This
design produces a sensor in position for face-down
mounting. This mounting optimizes current trends in
the ‘adhesion instead of soldering’ electronics sec-
tor. Using conductive adhesives provides reliable and
cost-effective connection to the circuit board and
is an alternative to the conventional reflow or wave
soldering. The FST series is available in 2 tolerance
classes, 0.12% and 0.24% per the DIN EN 60751
specification. Both tolerance classes are available in
the three resistance levels of the FST series.
S e r i e S S p e c i F i c aT i o n S
characTeriSTicS
Specification
DIN EN 60751
Tolerance
Class B (R0: ± 0.12 %), Class 2B (R0: ± 0.24
%)
Temperature range
-50 °C to 170 °C
Contact
AgPd metallising in thick-film technology
Long-term stability
R
0
drift ≤ 0.06 % after 1000 h at 170°C
Temp. coefficient
TCR = 3850 ppm/K
Other tolerances and values of resistance are available on request.
Resistance taken at 0°C
Nom. Resistance
Model
(ohms)
FST08-B-100E
100
FST08-2B-100E 100
FST08-B-500E
500
FST08-2B-500E 500
FST08-B-1K0E 1000
FST08-2B-1K0E 1000
Tolerance
Class
B
2B
B
2B
B
2B
Ambient conditions
Use unprotected only in dry environments
dimenSionS
(mm)
Measuring current
100 W: 0.3 to 1.0 mA
500 W: 0.1 to 0.7 mA
1000 W: 0.1 to 0.3 mA
Insulation resis-
> 100 MW at 20°C; > 2 MW at 170°C (glass
tance
cover)
2.1mm ±.15
(self heating has to be considered)
Self heating
0.8 K/mW at 0°C
Reaction time
Flowing water (v = 0.4 m/s): t0.5 = 0.10 s, t0.9
= 0.25 s
Air flow (v = 2 m/s): t0.5 = 2.5 s, t0.9 = 8.0 s
1.35mm ±.15
0.4mm ±.2
0.4mm ±.05
Processing infor-
• Reflow soldering or wave soldering, e.g.
mation
double wave soldering < 8 s / 235°
• Also can be mounted using SMD insertion
machines with Ag conductive adhesive.
Storage life
Stored in a nitrogen atmosphere, min. 9
months
• When mounting PCB circuits, the expansion
relationship of the sensor and the substrate
material must be taken into account.
Packaging
"Face-down" in blister reel, 1000 pcs / reel
12
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