2
Chip Resistor Surface Mount
YC
SERIES
248
6
SCOPE
This specification describes YC248 series chip resistors made by thick film process.
ORDERING INFORMATION
Part number is identified by the series, size, tolerance, packing style, temperature coefficient, special type and
resistance value.
YC248 – X X X XX XXXX
(1) (2) (3)
(4)
(5)
MARKING
YC248
(1) TOLERANCE
F = ±1%
J = ±5%
ynsc013
First two digits for significant figure and
3rd digit for number of zeros
Letter R: decimal place
(2) PACKAGING TYPE
R = Paper taping reel
Fig. 1
5% Marking, Value=56Ω
(3) TEMPERATURE
CHARACTERISTIC OF
RESISTANCE
G = ±200ppm/°C
– = Base on spec
DIMENSION
Table 1
H
B
T
W1
W2
TYPE
B (mm)
H (mm)
P (mm)
L (mm)
H
2
(mm)
T (mm)
W
1
(mm)
W
2
(mm)
YC248
0.3±0.15
0.45±0.05
0.5±0.05
4.0±0.2
0.3±0.05
0.45±0.1
0.4±0.15
1.6±0.15
(4) SPECIAL TYPE
07 = 7 inch dia. Reel
P
L
(5) RESISTANCE VALUE:
5R6, 56R, 560R, 5K6, 56K, 56M
CCB261_b
H
2
Fig. 2
YC248 series chip resistors construction
SCHEMATIC
For dimension see Fig. 2 and Table 1
16 15 14 13 12 11 10 9
handbook, 2 columns
R1 R2
R3
R4
R5 R6 R7 R8
CCB258_b
1
2
3
4
5
6
7
8
Fig. 3
Equivalent circuit diagram
R1=R2=R3=R4=R5=R6=R7=R8
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Dec. 20, 2002 V.03
3
Chip Resistor Surface Mount
YC
SERIES
248
6
POWER RATING
RATED POWER AT 70°C,
YC248=1/16W FOR ELEMENT
ndbook, halfpage
P
ELECTRICAL CHARACTERISTICS
Table 2
CHARACTERISTICS
Operating Temperature Range
Maximum Working Voltage
Maximum Overload Voltage
Dielectric Withstanding Voltage
Number of Resistors
YC248 1/16W
–55°C to +125°C
50V
100V
100V
8
10Ω to 1MΩ
±200ppm/°C
max
(%Prated )
MLB206
100
50
0
55
0
50
70
100 125
o
Tamb ( C)
Resistance Range
Temperature Coefficient
Fig. 4
Maximum dissipation (P
max
) in
percentage of rated power as
a function of the operating
ambient temperature (T
amb
)
RATED VOLTAGE:
The DC or AC (rms) continuous
working voltage corresponding to
the rated power is determined by
the following formula:
V=√(P X R)
Where
V=Continuous rated DC
or AC (rms) working voltage (V)
P=Rated power (W)
R=Resistance value (X)
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Dec. 20, 2002 V.03
4
Chip Resistor Surface Mount
YC
SERIES
248
6
TAPING REEL
Table 3
DIMENSION
Tape Width
ØA (mm)
ØB (mm)
ØC (mm)
ØD (mm)
W (mm)
T
max
(mm)
YC248
12mm
180+0/–3
60+1/–0
13±0.2
21±0.8
13±0.3
15.4±1
Fig. 5
Reel dimension
W
MSA284_b
For dimension see Table 3
gewidth
T
D
C
B
A
PAPER TAPE SPECIFICATION
Table 4
DIMENSION
A (mm)
B (mm)
W (mm)
E (mm)
F (mm)
P
0
(mm)
P
1
(mm)
P
2
(mm)
ØD
0
(mm)
T
max
(mm)
YC248
1.8±0.2
4.4±0.2
12±0.3
1.75±0.1
5.5±0.05
4.0±0.1
4.0±0.1
2.0±0.05
1.5+0.1
0.70±0.1
Fig. 6
Paper tape dimension
A
P1
T
MBD123_a
P0
D0
P2
E
F
W
B
For dimension see Table 4
PACKING METHOD
LEADER/TRAILER TAPE SPECIFICATION
leader end
trailer end
empty compartments
with cover tape
(min. 240 mm)
cover tape only
trailer (max. 260 mm)
leader
≥400
mm
CCB325
Fig. 7
Leader and trailer tape dimension
Table 5
Packing style and packaging quantity
PACKING STYLE
Paper Taping Reel (R)
REEL DIMENSION
7" (178 mm)
YC248
5,000
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Dec. 20, 2002 V.03
5
Chip Resistor Surface Mount
YC
SERIES
248
6
TYPE
Temperature
Coefficient of
Resistance
(T.C.R.)
TEST METHOD
Measure resistance at
+25°C or specified room
temperature as R
1
, then
measure at –55°C or
+125°C respectively as R
2
.
Determine the
temperature coefficient of
resistance from the
following formula:
ACCEPTANCE STANDARD
Formula
R
2
–R
1
T.C.R. = ------------------------- ×10
6
(ppm/°C)
R
1
(t
2
–t
1
)
Where
t
1
=+25°C or specified room temperature
t
2
=–55°C or +125°C test temperature
R
1
=resistance at reference temperature in ohms
R
2
=resistance at test temperature in ohms
Refer to table 2
Thermal
Shock
At –55±3°C for 2 minutes and at +125±2°C for 2 minutes as one cycle. After 5
cycles, the specimen shall be stabilized at room temp.
Measure the resistance to determine
ΔR/R(%)
after one more hour.
±(1%+0.05Ω) for 5% tolerance
Low
Temperature
Operation
Place the specimen in a test chamber maintained at –65 (+0/–5)°C. After one hour
stabilization at this temperature, full rated working voltage shall be applied for 45
(+5/–0) minutes. Have15 (+5/–0 ) minutes after remove the voltage, the specimen
shall be removed from the chamber and stabilized at room temperature for 24 hrs.
Measure the resistance to determine
ΔR/R(%).
±(1.0%+0.05Ω) for 5% tolerance
No visible damage
Short
Time
Overload
Apply 2.5 times of rated voltage but not exceeding the maximum overload voltage
for 5 seconds. Have the specimen stabilized at room temperature for 30 minutes
minimum.
Measure the resistance to determine
ΔR/R(%).
±(2.0%+0.05Ω) for 5% tolerance
No visible damage
Insulation
Resistance
Place the specimen in the jig and apply a rated continues overload voltage (R.C.O.V)
for one minute as shown.
Measure the insulation resistance.
≥10,000MΩ
Dielectric
Withstand
Voltage
Resistance
To Soldering
Heat
Place the specimen in the jig and apply a specified value continuous overload voltage
as shown for one minute.
Breakdown voltage>
specification and without
open/short
±(1.0%+0.05Ω) for 5% tolerance
No visible damage
Immerse the specimen in the solder pot at 260±5°C. for 10±1 seconds. Have the
specimen stabilized at room temperature for 30 minutes minimum.
Measure the resistance to determine
Δ
R/R(%).
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