BCcomponents
Product specification
Trimmable flat chip resistors
FEATURES
TCT 0603; TCU 0805;
TCA 1206
Production is strictly controlled and follows an extensive set
of instructions established for reproducibility. A newly
developed cermet layer is deposited on a super high grade
(96% Al
2
O
3
) ceramic substrate and conditioned to achieve
the desired temperature coefficient. Pre contacts are built on
both sides of the substrate. The resistor elements are covered
by glass for superior electrical, mechanical and climatic
protection. The terminations receive a final pure tin on
nickel plating.
The result of the determined production is verified by an
extensive testing procedure performed on 100% of the
individual chip resistors. Only accepted products are laid
directly into the paper tape in accordance with
IEC 60286-3.
The resistors are suitable for processing on automatic SMD
assembly systems. They are suitable for automatic soldering
using wave, reflow or vapour phase. The encapsulation is
resistant to all cleaning solvents commonly used in the
electronics industry, including alcohols, esters and aqueous
solutions.
The resistors are tested in accordance with
CECC 40401-802
which refers to
EN 140000
(IEC
60115-1)
and
EN 140400 (IEC 60115-8).
BCcomponents BEYSCHLAG has achieved
"Approval of
Manufacturer"
in accordance with
EN 100114-1.
•
Designed for state of the art laser trimming
•
Enables economical functional circuit adjustment
•
Low TC
±
50 ppm/K available
•
Excellent overall stability
•
Wide ohmic range: 10
Ω
to 1 M
Ω
•
Sizes:
– Imperial: 0603; 0805; 1206
– Metric: RR 1608M; RR 2012M; RR 3212M
APPLICATIONS
•
Electronic sensors
•
Oscillators
•
Electronic circuits.
DESCRIPTION
TCT 0603, TCU 0805
and
TCA 1206 trimmable flat chip
resistors
are best suited whenever stable circuit adjustment
is required and potentiometers will be either too expensive,
too unstable or too large. The trimming is done directly on
the printed-circuit board (PCB) using a state of the art laser
trimming system e.g. with YAG or CO
2
laser source. Typical
applications include any type of electronic sensors,
oscillators or electronic circuits which have to be trimmed
to certain functional parameters after PCB assembly.
2000 Sep 06
2
BCcomponents
Product specification
Trimmable flat chip resistors
ORDERING INFORMATION
TCT 0603; TCU 0805;
TCA 1206
Components may be ordered by using either a simple clear text ordering code, see “Type description and ordering code”or
BCcomponents’ unique 12NC.
Numeric Ordering code (12NC)
•
The resistors have a 12-digit ordering code starting with 2312.
•
The subsequent 4 digits indicate the resistor type, specification and packaging; see Table 2.
•
The remaining 4 digits indicate the resistance value:
– The first 3 digits indicate the resistance value.
– The last digit indicates the resistance decade in accordance with Table 3.
Table 2
12NC ordering code indicating resistor type and packaging
DESCRIPTION
P5
5000
units
300 1....
300 2....
300 3....
300 5....
300 6....
300 7....
320 1....
320 2....
320 3....
320 5....
320 6....
320 7....
340 2....
ORDERING CODE 2312 ... .....
CARDBOARD TAPE ON REEL
TOL.
+0/
−
30%
PW
20000
units
305 1....
305 2....
305 3....
305 5....
305 6....
305 7....
325 1....
325 2....
325 3....
325 5....
325 6....
325 7....
345 2....
TYPE
T.C.
±
100 ppm/K +0/
−
20%
TCT 0603
+0/
−
10%
+0/
−
30%
±
50 ppm/K
+0/
−
20%
+0/
−
10%
+0/
−
30%
±
100 ppm/K +0/
−
20%
TCU 0805
+0/
−
10%
+0/
−
30%
±
50 ppm/K
TCA 1206
+0/
−
20%
+0/
−
10%
±
100 ppm/K +0/
−
20%
Resistance ranges printed in bold are preferred T.C. / tolerance combinations with optimized availability.
Table 3
Last digit of 12NC indicating resistance decade
LAST DIGIT
9
1
2
3
4
5
O
RDERING EXAMPLE
The ordering code of a TCT 0603 resistor, value 47 k
Ω
and
TC 50 with +0/
−
20% tolerance, supplied in cardboard tape
of 5000 units per reel is: 2312 300 64703.
RESISTANCE DECADE
10
Ω
to 99,9
Ω
100
Ω
to 999
Ω
1 k
Ω
to 9,99 k
Ω
10 k
Ω
to 99,9 k
Ω
100 k
Ω
to 999 k
Ω
1 M
Ω
to 9,99 M
Ω
2000 Sep 06
5
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