Polish manufacturer
of precision resistors
Page 1/3
elpod
PPH ELPOD Sp. z o.o.
30-716 Kraków , ul.Przewóz 34
tel. 12 410 25 50; 12 410 25 51
fax. 12 410 25 52
www.elpod.com.pl
e-mail: biuro@elpod.com.pl
SMD – information chart
SMD surface-mount resistors
Resistors SMD 0805 and SMD 1206 are made using Thick Film Technology. On a high alundum (Al2O3)
content ceramic plate, resistive layer connected with tin plated leads is applied in layers and secured with
protective coating. Characteristic of SMD type surface-mount resistors are small dimensions, high stability of
electric parameters, high reliability and high mechanical strength. These resistors find use in
telecommunication devices, computers, audio-video equipment, medical equipment and military hardware.
Exterior appearance, construction and dimensions
Type
L
W
T
0805 2.0 + 0.15 1.25+0.15 0.5+0.15
D1
D2
0.4+0.2
1206 3.2 + 0.15 1.55+0.15 0.55+0.15 0.45+0.2
1
2-5
6
0.4+0.15
0.4+0.20
Alundum surface
Interior
electrodes
Exterior electrode
(Sn)
7
8
Resistive layer
Exterior coating
9
Marking
Parameters
Parameter type
Wattage rating at 70 °C (P)
Limit voltage**
Overload voltage**
Resistance range (R)
Resistance tolerance
Temperature coefficient of
resistance /TCR/
Operating temperature
SMD 0805
0,125 W
100 V
200V
10 R - 1M*
0.1; 0.25; 0.5; 1 [%]*
10; 15; 25; 50
[ppm/°C]*
SMD 1206
0,25 W
150 V
300V
10 R – 1M*
0.1; 0.25; 0.5; 1 [%]*
10; 15; 25; 50
[ppm/°C]*
–55 °C ÷ +155 °C
* Currently available resistance, tolerance and TCR values, can be found at www.elpod.com.pl
** Maximum operating voltage = √(P*R) or Limit voltage (the lower of the two values)
Maximum overload voltage = 2.5x√(P*R) or overload voltage (the lower of the two values)
Polish manufacturer
of precision resistors
Page 2/3
elpod
PPH ELPOD Sp. z o.o.
30-716 Kraków , ul.Przewóz 34
tel. 12 410 25 50; 12 410 25 51
fax. 12 410 25 52
www.elpod.com.pl
e-mail: biuro@elpod.com.pl
SMD – information chart
Packaging
SMD resistors are batch processed or loosely packed into plastic bags depending on supply. The minimum
order quantity of the same resistance value is 20 pc.
Marking
Resistors are marked with a 4-digit code.
For resistance below 100Ω: ABRC – where ABC marking digits, R comma placement
E.g.. 24R3 – 24.3Ω
For resistance from 100Ω – ABCX – where ABC marking digits, X number of zeroes at the end
E.g.. 2052 – 20500Ω= 20.5 kΩ
Resistor identification
The following identification data are placed on labels:
ELP XX XXXX X
X
TWR
Value
TWR
Code
Tolerance
Resistance value
±50ppm ±25ppm ±15ppm ±10ppm
H
E
P
R
Tolerance
value
±1%
±0.5%
±0.25% ±0.1%
Code
F
D
C
Resistance
value
10.7Ω
24.9kΩ
1MΩ
Code
10R7
24k9
1M
Type
0805
1206
Code
0805
1206
Dimension
Product labelling
SMD precision resistors
Labelling example:
ELP 0805 49k9 D P – resistor SMD 0805 with value 49.9kΩ – tolerance ±0.5% –
TWR±15
B
Page 3/3
Polish manufacturer
of precision resistors
elpod
SMD – information chart
PPH ELPOD Sp. z o.o.
30-716 Kraków , ul.Przewóz 34
tel. 12 410 25 50; 12 410 25 51
fax. 12 410 25 52
www.elpod.com.pl
e-mail: biuro@elpod.com.pl
Environmental testing
Test type
Requirements
Measurement method
in accordance with PN/T-80051;
PN/E-04600
-6
Temperature coefficient of
resistance (TCR)
Short overvoltage
Sustained operation
Resistivity to moist
constant heat
Dialectic strength
Insulation resistance
Solderability
Resistivity to soldering heat
Thermal shocks
Resistance to solvents
Update: September 2013
H= ±50 X10 /°C
-6
E= ±25 X10 /°C
-6
P= ±15 X10 /°C
-6
R= ±10 X10 /C
For resistors with tol. 1%; 0.5%;
∆R ±(0.5% + 0.01Ω)
For resistors with tol. 0.25%; 0.1%
∆R ±(0.1% + 0.01Ω)
∆R ±(0.25% + 0.01Ω)
∆R ±(0.25% + 0.01Ω)
Lack of surface damage and
breakdown
Min. 1 MΩ
Covering of min. 95% of contact
surface
6
TWR=(R2-R1) X10 /R1(t2-t1)
R1 – resistance at temp. 25°C
R2 – resistance at temp. 125°C
t2 – temp. 125°C
t1 – temp. 25°C
Resistor should carry a load
2.5x the wattage rate for 5 s.
Voltage cannot exceed max.
overload voltage for given
dimension
Resistor in temp 70°C carrying
rated load for 1000h in cycles:
1.5 h under voltage, 0.5 h with
no voltage
Resistor in temp. 40°C and min.
moisture 95% carrying rated
load for 1000h in cycles: 1.5 h
under voltage, 0.5 h with no
voltage
Voltage AC 200V for 60 s
Immersion in soldering solution
with temp. 245°C for 2 ± 0.5 s
For resistors with tol 1%; 0.5%;
∆R ±(0.5% + 0.01Ω)
For resistors with tol 0,25%; 0.1%
∆R ±(0.1% + 0.01Ω)
Resistor immersed in solder
with temp. 260°C for 10 s
∆R ±(0.25% + 0.01Ω)
100 cycles -55°C ÷ 150°C
For resistors with tol 1%; 0.5%;
∆R ±(0.5% + 0.01Ω)
For resistors with tol 0.25%; 0.1%
∆R ±(0.1% + 0.01Ω)
Immersion for 10 h in isopropyl
alcohol,
Drying in air for 30 min.