Rev Date: 06/19/2012 1 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
MLF/MLFM Series
Metal Film Melf Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Features:
• Thin Film Technology for precision and stability
• Excellent power to size ratio
• Exhibits good pulse power characteristics
• RoHS compliant / lead-free
Maximum Maximum Resistance
Working Overload Temperature
Voltage(1) Voltage Coefficient 0.1% 0.5% 1% 5%
±10 ppm/ºC 49.9 - 20K 49.9 - 20K 49.9 - 20K 49.9 - 20K
±15 ppm/ºC 49.9 - 300K 49.9 - 300K 49.9 - 300K 49.9 - 300K
±25 ppm/ºC 10 - 1M 10 - 1M 10 - 1M 10 - 4.7M
±50/100 ppm/ºC 10 - 1M 1 - 1M 1 - 10M 1 - 10M
±10 ppm/ºC 49.9 - 20K 49.9 - 20K 49.9 - 20K 49.9 - 20K
±15 ppm/ºC 49.9 - 300K 49.9 - 300K 49.9 - 300K 49.9 - 300K
±25 ppm/ºC 10 - 1M 10 - 1M 10 - 4.7M 10 - 4.7M
±50/100 ppm/ºC 10 - 1M 1 - 1M 1 - 5.1M 1 - 10M
±15 ppm/ºC 49.9 - 100K 49.9 - 100K 49.9 - 100K 49.9 - 100K
±25 ppm/ºC 10 - 1M 10 - 1M 10 - 1M 10 - 1M
±50/100 ppm/ºC 10 - 1M 1 - 1M 1 - 10M 1 - 10M
(
1
)
Lesser of
√
PR or maximum workin
g
volta
g
e
500V
1W 700V
0.5W 300V
MLFM1 350V
MLF12 0207
0207
400V
Ohmic Range (Ω) and Tolerance
Type / Code Power Rating
(Watts) @ 70ºC
Package
Size
200V0204MLF14 0.25W
Electrical Specifications
LDL1K
Body Length Body Diameter Inner Body Termination
0.138 ± 0.008 0.055 ± 0.006 0.09 0.020 ± 0.004 inches
3.50 ± 0.2 1.40 ± 0.15 2.3 0.50 ± 0.1 mm
0.232 ± 0.008 0.087 ± 0.008 0.185 0.020 ± 0.004 inches
5.90 ± 0.2 2.20 ± 0.2 4.7 0.50 ± 0.1 mm
Unit
MLF14
MLF12
MLFM1
Type / Code
Mechanical Specifications
Load Life ±2%
Load Life in Moisture ±2%
Resistance to Soldering Heat ±0.5%
Solderability Min 95% coverage
Short Time Overload ±0.5%
Insulation Resistance 1GΩ minimum
Operating Temperature Range: -55ºC to +155ºC
SpecificationTest
Performance Characteristics
Rev Date: 06/19/2012 2 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
MLF/MLFM Series
Metal Film Melf Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Power Derating Curve:
0
Percent Rated Power (%)
100
-55ºC 70ºC
80
60
40
20
155ºC
-60 -40 -20 0 20 40 60 80 100
Ambient Temperature (ºC)
120 140 160 180
How to Order
12345678910111
MLF12DTE4K75
2
Size
MLF Standard 14 Code Tol Value Code Code ppm
MLFM Mini 12 B 0.1% T10
1D
0.5% S15
F1% E25
J5% E24 C50
D100
10 ohm = 10R0
100 ohm = 100R
0.25W
T
0.5W
12, 11W
Size
147" Reel
Paper Tape
560 Kohm = 560K
1 Kohm = 1K00
E96, E24
Four characters with
the multiplier used
as the decimal
holder.
Quantity
3,000
2,000
Description
Product Series Power TCR Resistance ValuePackagingTolerance
Legacy Part Number (before January 3, 2011):
Nominal
Resistance
4.75K
Type Description Code Wattage Tolerance
V
alues SEI Types Pkg Qty Code Description
MLF Standard 1/4 0.25W T1 100 0.1% E96, E24 MLF0204 3,000
MLFM Mini 1/2 0.5W T2 50 0.5% E96, E24 MLF0207, MLFM0207 2,000
11W T925 1%E96, E24
TD 15 5% E24
TB 10
MLF 1/2 T9
SEI Type Code Tolerance PackagingTCR
TCR (ppm)
0.5% R
7" reel
paper tape
R
Rev Date: 06/19/2012 3 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
MLF/MLFM Series
Metal Film Melf Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Pulse withstanding capacity
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 4 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
MLF/MLFM Series
Metal Film Melf Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Frequency behavior
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 5 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
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 6 www.seielect.com
This specification may be changed at any time without prior notice marketing@seielect.com
Please confirm technical specifications before you order and/or use.
MLF/MLFM Series
Metal Film Melf Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Lightning Surge
Resistors are tested in accordance with IEC 60 115-1 using both 1.2/50us and 10/700us pulse shapes. The limit of
acceptance is a shift in resistance of less than 0.5% from the initial value.
1.2/50μs Lightning Surge
10/700μs Lightning Surge
