SMW, SMF
Vishay Phoenix
Wirewound/Metal Film Resistors,
Commercial Power, Vertical Mount
FEATURES
•
High power dissipation in small volume
•
Ideal for pulsing applications
•
Stand-up mounting saves space on PCB
•
High heat and moisture resistance
TECHNOLOGY
SMW:
The resistor element is a resistive wire, which is wound in a single layer on a ceramic rod. Metal caps are pressed over
the rod. The ends of the resistive wire and the leads are connected to the caps by welding.
SMF:
The resistor element is a metal film resistor consisting of a metal layer deposited over a high-grade ceramic rod. Metal
caps are pressed over the rod. The leads are connected to the caps by welding.
For both SMW and SMF, the resistor body and lead ends are housed within a rectangular ceramic case which is non-flammable,
will not melt even at high overloads and is resistant to most commonly used cleaning solvents, in accordance with MIL-STD-202,
method 215 and IEC 60 068-2-45. A special version with a thermal fuse for surge and inrush current protection is available upon
request.
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
SMW02
SMF02
SMW03
SMF03
SMW05
SMF05
SMW07
SMF07
SMF10
POWER RATING
P
70 °C
W
2
RESISTANCE RANGE
(1)
Ω
0.1 - 200
220 - 47K
0.1 - 560
620 - 47K
0.1 - 560
620 - 47K
0.1 - 1.5K
100 - 51K
0.47 - 1.5K
±5
24
TOLERANCE
(2)
%
E-SERIES
Decade
Values
3
5
7 at 25 °C
10 at 25 °C
Notes:
(1)
Special resistance values available upon request
(2)
Other tolerances available upon request
TECHNICAL SPECIFICATIONS
PARAMETER
Limiting Voltage
Insulation Voltage
Temperature Coefficient
(3)
Operating Temperature
Short Time Overload
Note:
(3)
UNIT
V
V
ppm/°C
°C
-
SMW
P
x
R
R < 10
Ω:
0 to + 600;
R
≥
10
Ω:
- 80 to + 140
SMF02/
SMF03
500
> 2000
SMF05
750
SMF07
1000
± 250
- 40 to + 200
10 x rated power for 5 seconds
Temperature Coefficient of ± 20, 30, 50 or 90 ppm/ºC available on request
For technical questions, contact: ww2aresistors@vishay.com
Document Number: 30248
Revision: 04-Oct-07
www.vishay.com
1
SMW, SMF
Wirewound/Metal Film Resistors,
Commercial Power, Vertical Mount
DIMENSIONS
in millimeters (inches)
W
D
Vishay Phoenix
H
L
P
Ød1
B1
B2
TYPE
SMW02
SMF02
SMW03
SMF03
SMW05
SMF05
SMW07
SMF07
SMW10
W ± 0.1
(0.04)
11.0
(0.43)
13.0
(0.51)
13.0
(0.51)
13.0
(0.51)
16.0
(0.63)
D ± 0.1
(0.04)
7.0
(0.28)
9.0
(0.36)
9.0
(0.36)
9.0
(0.36)
10.0
(0.47)
H ± 1.5
(0.06)
20.5
(0.81)
25.5
(1.01)
25.5
(1.01)
38.0
(1.49)
35.0
(1.38)
B1 - B2
+ 0.9/- 0.3
(+ 0.04/- 0.02)
+ 2.3/- 0.3
(+ 0.09/- 0.02)
+ 2.3/- 0.3
(+ 0.09/- 0.02)
+ 2.3/- 0.3
(+ 0.09/- 0.02)
+ 2.3/- 0.3
(+ 0.09/- 0.02)
L
4.5 ± 1.5
(0.18 ± 0.06)
4.5 ± 1.5
(0.18 ± 0.06)
4.5 ± 1.5
(0.18 ± 0.06)
4.5 ± 1.0
(0.18 ± 0.04)
4.5 ± 1.0
(0.18 ± 0.04)
P
5.0 ± 1.0
(0.20 ± 0.04)
5.0 ± 1.0
(0.20 ± 0.04)
5.0 ± 1.0
(0.20 ± 0.04)
5.0 ± 1.0
(0.20 ± 0.04)
7.5 ± 1.0
(0.30 ± 0.04)
Ød
0.8 ± 0.03
(0.031 ± 0.002)
0.8 ± 0.03
(0.031 ± 0.002)
0.8 ± 0.03
(0.031 ± 0.002)
0.8 ± 0.03
(0.031 ± 0.002)
0.8 ± 0.03
(0.031 ± 0.002)
ELECTRICAL CHARACTERISTICS
The power that the resistor can dissipate depends on the
operating temperature.
APPLICATION INFORMATION
160
120
100
ΔT
(K)
80
5
W
3
W
2
W
40
7
W
and 10
W
0
0
0
20
40
60
P
nom
(%)
- 55
0
25
70
T
amb
(°C)
200
80
100
120
P
max
(%)
2
W,
3
W
and 5
W
DERATING
The temperature rise at the solder spot as a function of dissipated
power
Notes:
Application information available on request:
• Temperature rise of resistor body (hot spot) as a function of
dissipation
• Pulse load behavior
• High frequency behavior (self inductance)
Maximum dissipation (P
max
) in percentage of rated power as a
function of ambient temperature (T
amb
)
Document Number: 30248
Revision: 04-Oct-07
For technical questions, contact: ww2aresistors@vishay.com
www.vishay.com
2
SMW, SMF
Vishay Phoenix
MARKING
The resistor is marked with the resistor type, the rated power,
the nominal resistance value (R for values
Ω
and K for values
kΩ is used as decimal point), the resistance tolerance and
the production date (week and year), are printed in black on
the resistor body.
Example:
PHX
27R
204
SMW02
5
%
2W
Wirewound/Metal Film Resistors,
Commercial Power, Vertical Mount
ORDERING INFORMATION
PRODUCT
TOLERANCE
ORDERING
CODE
2306 340 03xxx
2306 345 03xxx
2306 341 03xxx
500
SMF03
SMW05
SMF05
SMW07
SMF07
SMW10
±5
%
2306 346 03xxx
2306 342 03xxx
2306 347 03xxx
2306 343 03xxx
340
2306 348 03xxx
2306 344 03xxx
210
0.80
(0.031)
BOX
LEAD Ø
in millimeters
(inches)
PACKAGING
QUANTITY
(pieces)
SMW02
SMF02
SMW03
Last Digit of Ordering Code
RESISTANCE
DECADE
0.1 - 0.91
Ω
1 - 9.1
Ω
10 - 91
Ω
100 - 910
Ω
1 - 9.1 kΩ
10 - 91 kΩ
LAST DIGIT
7
8
9
1
2
3
The resistors have 12 digit ordering code starting with 2306.
The next 5 digits indicate the resistor type and packaging,
see table ORDERING INFORMATION.
The last 3 digits indicate the resistance value:
- The first 2 digits of these last 3 indicate the actual
resistance value
- The last digit indicates the resistance decade in
accordance with table “Last Digit of Ordering Code“
Example:
SMW02, 47
Ω,
± 5
%,
box of 500 pieces is
2306 340 03479
www.vishay.com
3
For technical questions, contact: ww2aresistors@vishay.com
Document Number: 30248
Revision: 04-Oct-07
SMW, SMF
Wirewound/Metal Film Resistors,
Commercial Power, Vertical Mount
NAFTA ORDERING INFORMATION
PRODUCT
SMW02
SMF02
SMW03
SMF03
SMW05
SMF05
SMW07
SMF07
SMW10
±5
%
TOLERANCE
NAFTA
ORDERING CODE
SMW02WxxxxxJ
SMF02WxxxxxJ
SMW03WxxxxxJ
500
SMF03WxxxxxJ
SMW05WxxxxxJ
SMF05WxxxxxJ
SMW07WxxxxxJ
340
SMF07WxxxxxJ
SMW10WxxxxxJ
210
0.80
(0.031)
BOX
LEAD Ø
in millimeters
(inches)
PACKAGING
QUANTITY
(pieces)
Vishay Phoenix
Examples of the Ohmic Value
Value
1
Ω
10
Ω
100
Ω
1 kΩ
10 kΩ
5 DIGITS
1R000
10R00
100R0
1K000
10K00
The ohmic value in the NAFTA ordering code (see table
NAFTA ORDERING INFORMATION) is represented by the
“xxxxx“ in the middle of the above ordering code. The table
“Examples of the Ohmic Value” gives some examples on
how to use these 5 digits.
Example:
SMW02, 47
Ω,
± 5
%,
box of 500 pieces is
SMW02W47R00J
PACKAGING
in millimeters (inches)
P
N
M
PRODUCT
SMW02
SMF02
SMW03
SMF03
SMW05
SMF05
SMW07
SMF07
SMW10
Document Number: 30248
Revision: 04-Oct-07
P
N
N
QUANTITY
(pieces)
500
262 (10.3)
84 (3.3)
128 (5.1)
340
210
For technical questions, contact: ww2aresistors@vishay.com
www.vishay.com
4
SMW, SMF
Vishay Phoenix
TESTS AND REQUIREMENTS
Essentially all tests are carried out in accordance to the schedule of IEC publications 60115-1, category 40/200/56 (rated
temperature range - 40 to + 200 °C; damp heat, long term, 56 days and along the lines of IEC publications 60068-2);
“Recommended basic climatic and mechanical robustness testing procedure for electronic components” and under standard
atmosphere conditions according to IEC 60068-1 subclause 5.3, unless otherwise specified.
In some instances deviations from IEC applications were necessary for our method specified.
Wirewound/Metal Film Resistors,
Commercial Power, Vertical Mount
PERFORMANCE
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST
PROCEDURE
REQUIREMENTS
4.8
Temperature
coefficient
Between
- 40 °C and + 200 °C:
SMW
R < 10
Ω:
R
≥
10
Ω:
SMF
Room temperature;
P = 10 x Pn; 5 seconds
(voltage not more than
1000 V/25 mm)
Load 200 ± 10 N
0 to 600 ppm/°C
- 80 to + 140 ppm/°C
± 250 ppm/°C
ΔR/R
max
± 2
%
+ 0.1
Ω
No damage
ΔR/R
max
± 0.5
%
+ 0.05
Ω
No damage
4.13
Short time overload
4.15
4.16
4.16.2
-
21(U)
21(Ua1)
Robustness of
resistor body
Robustness of
terminations:
Tensile all samples
Solderability
(after ageing)
Load 10 N; 10 seconds
16 hours at 155 °C;
leads immersed in flux 600
for 2 ± 0.5 seconds
in a solder bath at 235 ± 5 °C
Thermal shock: 3 seconds,
350 ± 10 °C;
2.5 mm from body
30 minutes at - 40 °C and
30 minutes + 200 °C;
5 cycles
Frequency 10 to 55 Hz,
displacement 0.75 mm or
acceleration 10 g,
three directions;
total 6 hours (3 x 2 hours)
Good tinning,
(≥ 95
%
covered)
no damage
ΔR/R
max
± 0.5
%
+ 0.05
Ω
No damage
ΔR/R
max
± 1
%
+ 0.05
Ω
4.17
20(Ta)
4.18
20(Tb)
Resistance to
soldering heat
Rapid change of
temperature
4.19
14(Na)
4.22
6(Fc)
Vibration
No damage
ΔR/R
max
± 0.5
%
+ 0.05
Ω
4.23
4.23.2
4.23.3
4.23.4
4.23.6
2(Ba)
30(Db)
1(Aa)
30 (Db)
Climatic sequence:
Dry heat
Damp heat
(accelerated)
1st cycle
Cold
Damp heat
(accelerated)
remaining cycles
Damp heat
(steady state)
Endurance
(at 70 °C)
16 hours, + 200 °C
24 hours, 25 °C to 55 °C;
90 to 100
%
RH
2 hours, - 40 °C
5 days; 25 °C to 55 °C;
90 to 100% RH
56 days; 40 °C; 90 to 95
%
RH;
loaded with 0.01 Pn
1000 hours load with 0.9 Pn;
1.5 hours ON and 0.5 hours OFF
ΔR/R
max
± 3
%
+ 0.1
Ω
No visual damage
ΔR/R
max
± 5
%
+ 0.1
Ω
Document Number: 30248
Revision: 04-Oct-07
ΔR/R
max
± 3
%
+ 0.05
Ω
4.24
4.25.1
www.vishay.com
5
3 (Ca)
-
For technical questions, contact: ww2aresistors@vishay.com
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