MLF/MLFM Series
Metal Film Melf Resistor
Features:
•
•
•
•
Thin Film Technology for precision and stability
Excellent power to size ratio
Exhibits good pulse power characteristics
RoHS compliant / lead-free
Stackpole Electronics, Inc.
Resistive Product Solutions
Electrical Specifications
Type / Code
Package
Size
Power Rating
(Watts) @ 70ºC
Maximum
Working
Voltage(1)
200V
Maximum
Overload
Voltage
400V
Resistance
Temperature
Coefficient
±10 ppm/ºC
±15 ppm/ºC
±25 ppm/ºC
±50/100 ppm/ºC
±10 ppm/ºC
±15 ppm/ºC
±25 ppm/ºC
±50/100 ppm/ºC
±15 ppm/ºC
±25 ppm/ºC
±50/100 ppm/ºC
Ohmic Range (Ω) and Tolerance
0.1%
49.9 - 20K
49.9 - 300K
10 - 1M
10 - 1M
49.9 - 20K
49.9 - 300K
10 - 1M
10 - 1M
49.9 - 100K
10 - 1M
10 - 1M
0.5%
49.9 - 20K
49.9 - 300K
10 - 1M
1 - 1M
49.9 - 20K
49.9 - 300K
10 - 1M
1 - 1M
49.9 - 100K
10 - 1M
1 - 1M
1%
49.9 - 20K
49.9 - 300K
10 - 1M
1 - 10M
49.9 - 20K
49.9 - 300K
10 - 4.7M
1 - 5.1M
49.9 - 100K
10 - 1M
1 - 10M
5%
49.9 - 20K
49.9 - 300K
10 - 4.7M
1 - 10M
49.9 - 20K
49.9 - 300K
10 - 4.7M
1 - 10M
49.9 - 100K
10 - 1M
1 - 10M
MLF14
0204
0.25W
MLF12
0207
0.5W
300V
500V
MLFM1
0207
1W
350V
700V
(1) Lesser of
√PR
or maximum working voltage
Mechanical Specifications
Type / Code
MLF14
MLF12
MLFM1
L
Body Length
0.138 ± 0.008
3.50 ± 0.2
0.232 ± 0.008
5.90 ± 0.2
D
Body Diameter
0.055 ± 0.006
1.40 ± 0.15
0.087 ± 0.008
2.20 ± 0.2
L1
Inner Body
0.09
2.3
0.185
4.7
K
Termination
0.020 ± 0.004
0.50 ± 0.1
0.020 ± 0.004
0.50 ± 0.1
Unit
inches
mm
inches
mm
Performance Characteristics
Test
Load Life
Load Life in Moisture
Resistance to Soldering Heat
Solderability
Short Time Overload
Insulation Resistance
Operating Temperature Range: -55ºC to +155ºC
Specification
±2%
±2%
±0.5%
Min 95% coverage
±0.5%
1GΩ minimum
Rev Date: 06/19/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
1
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marketing@seielect.com
MLF/MLFM Series
Metal Film Melf Resistor
Power Derating Curve:
100
Percent Rated Power (%)
80
60
40
20
0
-60
-55ºC
Stackpole Electronics, Inc.
Resistive Product Solutions
70ºC
155ºC
-40
-20
0
20
40
60
80
100
Ambient Temperature (ºC)
120
140
160
180
How to Order
1
2
3
4
5
6
7
8
9
10
11
12
M
L
F
1
2
D
T
E
4
K
7
5
Product Series
MLF
Standard
Mini
MLFM
Size
14
12
1
Power
0.25W
0.5W
1W
Tolerance
Code Tol
Value
B
0.1%
D
0.5% E96, E24
F
1%
J
5%
E24
Code
T
Packaging
Size
Description
7" Reel
14
12, 1
Paper Tape
Quantity
3,000
2,000
TCR
Code ppm
T
10
S
15
E
25
C
50
D
100
Resistance Value
Four characters with
the multiplier used
as the decimal
holder.
10 ohm = 10R0
100 ohm = 100R
1 Kohm = 1K00
560 Kohm = 560K
Legacy Part Number (before January 3, 2011):
SEI Type
Code
TCR
Nominal
Resistance
Tolerance
Packaging
MLF
Type
MLF
MLFM
Description
Standard
Mini
1/2
Code Wattage
1/4
0.25W
1/2
0.5W
1
1W
T9
TCR (ppm)
T1
100
T2
50
T9
25
TD
15
TB
10
4.75K
0.5%
Tolerance
0.1%
0.5%
1%
5%
Values
E96, E24
E96, E24
E96, E24
E24
SEI Types
MLF0204
MLF0207, MLFM0207
R
Pkg Qty Code Description
3,000
7" reel
R
2,000
paper tape
Rev Date: 06/19/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
2
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marketing@seielect.com
MLF/MLFM Series
Metal Film Melf Resistor
Pulse withstanding capacity
Stackpole Electronics, Inc.
Resistive Product Solutions
The single impulse graph is the result of 50 impulses of rectangular shape applied at one-minute intervals. The limit of
acceptance was a shift in resistance of less than 1% from the initial value. The power applied was subject to the
restrictions of the maximum permissible impulse voltage graph shown.
MLF Series Single Pulse (100 Ohm)
MLF0207
MLF0204
Continuous Pulse
The continuous load graph was obtained by applying repetitive rectangular pulses where the pulse period was adjusted
so that the average power dissipated in the resistor was equal to its rated power at 70ºC. Again the limit of acceptance
was a shift in resistance of less than 1% from the initial value.
MLF Series Continuous Pulse (100 Ohm)
MLF0207
MLF0204
Rev Date: 06/19/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
3
www.seielect.com
marketing@seielect.com
MLF/MLFM Series
Metal Film Melf Resistor
Frequency behavior
Stackpole Electronics, Inc.
Resistive Product Solutions
Resistors are designed to function according to ohmic laws. This is basically true of resistors for frequencies up to 100
kHz. At higher frequencies, there is an additional contribution to the impedance by an ideal resistor switched in series
with a coil and both switched parallel to a capacitor. The values of the capacitance and inductance are mainly
determined by the dimensions of the terminations and the conductive path length.
The environment surrounding components has a large influence on the behavior of the component on the printed-circuit
board.
Frequency versus Impedance
MLF0204
Frequency versus Phase Angle
MLF0204
Rev Date: 06/19/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
4
www.seielect.com
marketing@seielect.com
MLF/MLFM Series
Metal Film Melf Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Frequency versus Impedance
MLF0207
Frequency versus Phase Angle
MLF0207
Rev Date: 06/19/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
5
www.seielect.com
marketing@seielect.com
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