LOW-OHMIC POWER CHIP RESISTORS
LPRC221
DATA SHEET
5%
size 2512
Product Specification – Jun 24, 2003 V.6
Phycomp
Product specification
Low-ohmic power chip resistors
size 2512
FEATURES
•
Reduced size of final equipment
•
Low assembly costs
•
Higher component and equipment
reliability.
APPLICATIONS
•
Converters
•
Printers
•
Computers
•
Battery chargers
•
Power supplies
•
Automotive.
DESCRIPTION
The resistors are constructed on a
high grade ceramic body (aluminium
oxide). Internal metal electrodes are
added at each end and connected
by a resistive paste which is applied
to the top surface of the substrate.
The composition of the paste is
adjusted to give the approximate
resistance required and the value is
trimmed to within tolerance by laser
cutting of this resistive layer.
The resistive layer is covered with a
protective coating and printed with
the resistance value. Finally, the two
external end terminations are added.
For ease of soldering the outer layer
of these end terminations is a
lead/tin alloy.
QUICK REFERENCE DATA
DESCRIPTION
Resistance range; note 1
Resistance tolerance; note 1
Temperature coefficient:
0.01
Ω ≤
R
<
0.02
Ω
0.02
Ω ≤
R
<
0.051
Ω
0.051
Ω ≤
R
<
0.10
Ω
0.10
Ω ≤
R
<
0.39
Ω
0.39
Ω ≤
R
<
0.51
Ω
0.51
Ω ≤
R
<
1
Ω
Absolute maximum dissipation at T
amb
= 70
°C
Maximum permissible voltage
Operating temperature range
Climatic category (IEC 60068)
Basic specification
Note
±5%
LPRC221
5%
VALUE
0.01
Ω
to 0.99
Ω,
E24
≤±1500 ×
10
−6
/K
≤±1000×
10
−6
/K
≤±800×
10
−6
/K
≤±600×
10
−6
/K
≤±300×
10
−6
/K
≤±200 ×
10
−6
/K
1W
250 V (DC or RMS)
−55 °C
to
+125 °C
55/125/56
IEC 60115-8
1. Non-E24 values and special tolerances are available on request.
2003 Jun 24 Rev.6
2
www.yageo.com
Phycomp
Product specification
Low-ohmic power chip resistors
size 2512
ORDERING INFORMATION
Table 1
Ordering code indicating type and packing
LPRC221
5%
ORDERING CODE 2322 762 …..
TYPE
RESISTANCE
RANGE
0.01 to 0.099
Ω
0.1 to 0.99
Ω
Table 2
TOL.
(%)
BLISTER TAPE ON REEL
4000 units
LPRC221
±5
90…
60...
O
RDERING EXAMPLE
The ordering code of an LPRC221
low-ohmic power chip resistor, value
0.51
Ω
with a tolerance of 5%,
supplied on blister tape of 4000 units
per reel is: 2322 762 60517.
Ordering code (12NC)
•
The resistors have a 12-digit
ordering code starting with
2322 762
•
The subsequent 2 digits indicate
the resistor type and packing; see
Table 1.
•
The remaining 3 digits indicate
the resistance value:
−
The first 2 digits indicate the
resistance value.
−
The last digit indicates the
resistance decade in
accordance with Table 2.
Last digit of 12NC
LAST DIGIT
0
7
RESISTANCE
DECADE
0.01 to 0.099
Ω
0.1 to 0.99
Ω
2003 Jun 24 Rev.6
3
www.yageo.com
Phycomp
Product specification
Low-ohmic power chip resistors
size 2512
FUNCTIONAL DESCRIPTION
Product characterization
The resistors are available in the
E24 series for resistors with a
tolerance of 5%. The values of the
E24 series are in accordance with
“IEC publication 60063”.
Limiting values
TYPE
LIMITING LIMITING
VOLTAGE
(1)
POWER
(W)
(V)
250
1.0
0
55
0
50
70
100 125
o
Tamb ( C)
LPRC221
5%
D
ERATING
The power that the resistor can dissipate depends on the operating
temperature; see Fig.1.
Pmax
(%Prated )
100
MLB206
50
LPRC221
Note
1. The maximum voltage that may
be continuously applied to the
resistor element, see
“IEC publication 60115-8”.
Fig.1
Maximum dissipation (P
max
) in percentage of rated power as a
function of the ambient temperature (T
amb
).
2003 Jun 24 Rev.6
4
www.yageo.com
Phycomp
Product specification
Low-ohmic power chip resistors
size 2512
MECHANICAL DATA
Mass per 100 units
TYPE
LPRC221
Marking
MASS
(g)
Outlines
LPRC221
5%
protective coat
3.85
resistor layer
inner electrode
Each resistor is marked with a 4-digit
code on the protective coating to
designate the nominal resistance
value.
4-
DIGIT MARKING
The R is used as a decimal point,
the other 3 digits are significant.
Example
MARKING
R010
R510
P
ACKAGE MARKING
The packing is also marked and
includes resistance value, tolerance,
catalogue number, quantity,
production period, batch number and
source code.
RESISTANCE
0.01
Ω
0.51
Ω
T
end termination
ceramic substrate
t
b
protective coat
t
t
marking
W
R510
CCB548
L
For dimensions see Table 3.
Fig.2
Outlines.
Table 3
TYPE
Chip resistor type and relevant physical dimensions; see Fig.2
L
(mm)
6.35
±0.10
W
(mm)
3.2
±0.15
T
(mm)
t
t
(mm)
t
b
(mm)
0.5
±0.20
LPRC221
0.55
±0.10
0.60
±0.20
2003 Jun 24 Rev.6
5
www.yageo.com
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