SMD Moulded Power Resistor
Type SM Series
Literature No. 1773242
Issued: 06-07
Dimensions are shown for
reference purposes only.
Dimensions are in millimetres
unless otherwise specified.
Specifications subject to
change.
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Key Features
■Low Profile Design
■Available on Tape
■Very Wide Value Range
■Ideal for Power Circuitry
■Available in 1, 2,3 or 5 Watts
Type SM Series
Tyco Electronics CGS introduces a
surface mount power resistor suited to
meet today's circuit design needs.
Each size offers low profile case
design with flexible tinned copper
terminations for reliable solder joints.
All styles utilize a fully welded
construction technique, unlike other
designs that rely solely on tinned
termination connections. These
features allow the SM Series to
withstand the higher temperatures
associated with reflow, vapour
phase, or infrared (IR) manufacturing
processes without degradation.
Characteristics -
Electrical
Characteristics -
Environmental
Test Condition SM (Wire) SM (Metal Film)
Temperature Coefficient -55°C ~ +200°C ± 200ppm /°C ± 100ppm /°C
of Resistance:
Short Time Overload: 5 times of rated wattage for 5 sec. ± 1% ± 0.5%
Rated Load: Rated voltage for 30 minutes ± 1% ± 0.5%
Insulation Resistance: 500V megger. 10,000 MΩ10,000 MΩ
Load Life: 70°C on-off cycle 1,000hrs. ± 2% ± 1%
Humidity Load Life: 40°C - 95% RH on-off cycle 500hrs. ± 2% ± 1%
Power Derating
-80 -50 -40 0 20 40 80 120 160 200 240 280
100
75
50
25
0
Rated Load (%)
Ambient Temperature (°C)
Maximum Allowable Body Temperature
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
250
200
150
100
50
0
Temperature Rise (°C)
Power (W)
SMW2W
135°C
SMW1W
100°C
SM (Wire) SM (Metal Film)
Values SMF1: ---- 10R – 2M
Values SM_2: R10 – 200R 201R – 2M
Values SM_3: R10 – 300R 301R – 2M
Values SM_5: R10 - 500R 501R - 2M
Value Grid: E24
Resistance Tolerance: 1% or 5%
Power Rating @ 25°C SMF1: ---- 1.0 Watt
Power Rating @ 25°C SM_2: 2.0 Watts
Power Rating @ 25°C SM_3: 3.0 Watts
Power Rating @ 25°C SM_5: 5.0 Watts
Derating: See Curve Below
Max Operating Voltage SMF1: ---- 300 Volts
Max Operating Voltage SM_2: 300 Volts
Max Operating Voltage SM_3: 500 Volts
Max Operating Voltage SM_5: 500 Volts
SMW5W
220°C
SMW3W
160°C