Document Number 28531 For technical questions, contact: dc-film@vishay.com www.vishay.com
Revision: 18-Oct-07 333
BFC2 809 080..
Vishay BCcomponents
Film Dielectric Trimmers
FEATURES
•High temperature type
•Housing dimensions:
10 mm x 11 mm x 11 mm
•For a basic grid of 2.54 mm
•Vertical version with a round head
•Top and bottom adjustment
APPLICATIONS
•For fine adjustment in professional applications
DESCRIPTION:
The trimmers consist of a polysulphone housing, brass rotor
and plated brass stator with PTFE film as the dielectric. The
stator plate tags are heat sealed to the housing.
The rotor contact surfaces are plated to ensure a long life
and a stable contact even under severe climatic conditions.
A colored dot indicates the maximum capacitance.
Flux absorption between the vanes is prevented.
Cleaning with solvents is not advised.
QUALITY LEVEL:
Sampling and data evaluation for quality level in accordance
with “MIL-STD-105D” and “IEC 60410”:
< 0.15 % major defects
< 0.65 % minor defects
Each capacitor is tested for minimum Cmax and is also
subjected to the full test voltage.
Cmin/Cmax:
4/38 to 5/57 pF
RATED VOLTAGE (DC):
250 V
LIFE OF TRIMMER:
Maximum 10 cycles: rotation in 180° only (the electrical and
mechanical performance is not guaranteed if rotated beyond
10 cycles)
TEST VOLTAGE (DC) FOR 1 MINUTE:
500 V
MAXIMUM CONTACT RESISTANCE:
5 mΩ
MINIMUM INSULATION RESISTANCE:
10 000 MΩ
CATEGORY TEMPERATURE RANGE:
- 40 to + 125 °C
CLIMATIC CATEGORY (IEC 60068):
40/125/21
MINIMUM STORAGE TEMPERATURE:
- 55 °C
RELATED SPECIFICATION:
IEC 60418-1 and 4
EFFECTIVE ANGLE OF ROTATION:
180° (rotation in 180° only, see “Life of Trimmer”)
OPERATING TORQUE:
2 to 25 mNm
MAXIMUM AXIAL THRUST:
2 N
e3
www.vishay.com For technical questions, contact: dc-film@vishay.com Document Number 28531
334 Revision: 18-Oct-07
BFC2 809 080..
Vishay BCcomponents Film Dielectric Trimmers
A
A
A - A
0.6 ± 0.1
0.85
max.
0.5
± 0.15
∅ 1.6
DET AIL Z
turned 90 °
7.62 ± 0.2
4 ± 0.5
(3 × )
11
max.
∅ 2.5
∅ 3
Z
0.6
0.7
1.15 max.
rotor (2 × )
color mark
1)
sprue
5.08
± 0.2
2.54
± 0.2
4.8 ± 0.2
10.5
max.
10
max.
10.9 max.
1 (4 × )
0.8 min.
(4 × )
stator
Trimmers BFC2 809 080.. series, with round heads
Dimensions in millimeters
ADJUSTMENT
For top adjustment a screwdriver or trimming key can be used; for
bottom adjustment a key is required as shown below
S
R
R
1.3 (3×)
2.54
Hole pattern
R = rotor, S = stator.
The large hole is for bottom adjustment and
the diameter is determined by user’s
requirements.
∅ 3
2 min.
0.7
+ 0.1
0
0.6
+ 0.2
0
∅ 1.7
+ 0.1
0
Bottom adjustment key
BFC2 809 080..
Film Dielectric Trimmers Vishay BCcomponents
Document Number 28531 For technical questions, contact: dc-film@vishay.com www.vishay.com
Revision 18-Oct-07 335
MOUNTING
The trimmer can be mounted on printed-circuit boards with a
grid of 2.54 mm and a minimum hole diameter of 1.25 mm.
PACKAGING
Blister packs of 70 units each. For smallest packaging
quantity (SPQ) see Electrical Data Table.
ORDERING INFORMATION
ELECTRICAL DATA
Note:
1. PTFE = polytetrafluorethylene
2. C: 60 % to 80 % of Cmax; Tamb: from + 20 °C to + 125 °C
Cmin/Cmax
(pF)
CATALOG NUMBER BFC2 809 080..
TOP AND BOTTOM ADJUSTMENT
4/38 02
5/57 03
GUARANTEED
MAX. Cmin/
MIN. Cmax
at 200 kHz
(pF)
SHAPE
OF HEAD DIEL.
tan δ at
Cmax x 10−4TEMP.
COEFF.2)
(10−6/K)
MIN. fres
at Cmax
(MHz)
COL.
OF
DOT
SPQ
CATALOG
NUMBER
BFC2 ... .....
1 MHz 100 MHz
4/38 round PTFE1) ≤ 10 ≤ 25 - 200 ± 250 170 yellow 350 .... 809 08002
5/57 round 150 blue 350 .... 809 08003
TEST PROCEDURES AND REQUIREMENTS
IEC
60418-1
CLAUSE
IEC 60068
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
4.2 method of mounting method A
14 capacitance drift after TC measurement ΔC/C: ≤ 2.0 %
19 thrust axial thrust of 2 N ΔC/C: ≤ 0.2 %
21 robustness of terminations:
21.1 Ua tensile 1 N no damage
21.2 Ub bending 1 cycle no damage
22 Na rapid change of temperature 1 cycle; 0.5 hours at lower and 0.5
hours at upper category
temperature
ΔC/C: ≤ 2.5 %
23 T soldering:
Ta solderability solder bath immersion 3 mm;
235 °C; 2 s
good wetting
no mechanical damage
Tb resistance to heat solder bath: 260 °C; 10 s no mechanical damage
24 Eb impact bump 4000 ± 10 bumps; 40 g; 6 ms ΔC/C: ≤ 0.5 %;
no mechanical damage
25 Fc vibration frequency 10 to 55 Hz;
amplitude 0.35 mm;
1.5 hours
ΔC/C: ≤ 0.2 %;
no mechanical damage
www.vishay.com For technical questions, contact: dc-film@vishay.com Document Number 28531
336 Revision: 18-Oct-07
BFC2 809 080..
Vishay BCcomponents Film Dielectric Trimmers
26 climatic sequence: ΔC/C: ≤ 2.5
26.1 B dry heat 16 hours at upper category
temperature
tan δ: ≤ 10 x 10-4
Rins: ≥ 10 000 MΩ;
rotor contact R: ≤ 5mΩ
26.2 D damp heat accelerated,
first cycle
1 cycle; 24 hours; + 40 °C;
95 to 100 % RH
voltage proof:
500 V for 1 minute
26.3 Aa cold 16 hours; - 40 °C visual examination:
no mechanical damage
26.5 damp heat accelerated,
remaining cycles
1 cycle; 24 hours; + 40 °C;
95 to 100 % RH
operating torque:
1to25mNm
27 Ca damp heat steady state 21 days; + 40 °C;
90 to 95 % RH
ΔC/C: ≤ 2.5 %
tan δ: ≤ 10 x 10-4
Rins: ≥ 10 000 MΩ;
rotor contact R: ≤ 5mΩ
voltage proof:
500 V for 1 minute
visual examination:
no mechanical damage
operating torque:
1to25mNm
29 mechanical endurance 10 cycles
Maximum 10 cycles: rotation in
180° only (the electrical and
mechanical performance is not
guaranteed if rotated beyond 10
cycles)
ΔC/C: ≤ 0.3 %
ΔC/C after axial thrust: ≤ 0.3 %;
rotor contact R: ≤ 5mΩ
voltage proof:
500 V for 1 minute
visual examination:
no mechanical damage
operating torque:
1to25mNm
IEC
60418-1
CLAUSE
IEC 60068
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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All product specifications and data are subject to change without notice.
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(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
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information provided herein to the maximum extent permitted by law. The product specifications do not expand or
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therein, which apply to these products.
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