Approval sheet
MM07B, MM04B, MM07C, MM04C
±
1%,
±
0.5%,
±
0.25%,
±
0.1%
TC50 , TC25
Automotive Thin Film MELF Resistors
(Tantalum Nitride Thin Film MELF Resistor)
Size: 0207, 0204
AEC-Q200 Qualified
*Contents in this sheet are subject to change without prior notice.
Page 1 of 11
ASC_MMxxB&C
AUG - 2018
Approval sheet
FEATURE
1. High Reliability
T
antalum Nitride Thin Film MELF Resistor.
2. AEC-Q200 Qualified
3. Products with lead free terminations meet RoHS requirements
4. Best in class pulse load capability
5. +/-0.1% is upon the customer request.
APPLICATION
•
•
•
•
Automotive electronics
Medical equipment
Measuring instrument
Industrial
DESCRIPTION
The resistors are constructed in a high grade ceramic body (aluminum oxide). external metal electrodes are added at both
end and connected by a resistive layer that is applied to the metallised rods. The composition of the resistive layer is
adjusted to give the approximate resistance required and the value is trimmed to nominated value within tolerance which
controlled by laser trimming of this resistive layer.
The resistive film is covered by epoxy molding compound designed for electrical, mechanical and climatic protection,and
color code rings designate the resistance value.
Finally, the two external end terminations are added nickel plating and tin. For environmental soldering issue, the outer
layer of these end terminations is a Lead-free solder .
Fig 1. Construction of MELF
Page 2 of 11
ASC_MMxxB&C
AUG - 2018
Approval sheet
QUICK REFERENCE DATA
Item
Series No.
Size code
Resistance Tolerance
Resistance Range
TCR (ppm/°C)
Max. dissipation at T
amb
=70°C
Max. Operating Voltage (DC or RMS)
Max. Overload Voltage (DC or RMS)
Operating temperature
Note :
1.
2.
This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication
60115-8”
Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by
MM07B
General Specification
MM07C
MM04B
MM04C
0207 ( 6123 )
0204 ( 3715 )
±1%
,±0.5%,
±0.25%, ±0.1%
11Ω ~ 100KΩ
±50ppm/°C
1/2W
350V
700V
- 55 ~ +155
℃
±25ppm/°C
10Ω ~ 50KΩ
±50ppm/°C
1/4W
200V
400V
±25ppm/°C
RCWV
=
Rated Power
×
Resistance Value
or Max. RCWV listed above, whichever is lower.
DIMENSIONS :( unit:mm)
Type
L
D
K
Weight (g)
1000pcs
0207
5.90±0.20
±
2.20±0.10
±
1.40±0.10
±
87.81
0204
3.50±0.10
±
1.40±0.15
±
0.90±0.10
±
22.34
K
L
D
Page 3 of 11
ASC_MMxxB&C
AUG - 2018
Approval sheet
FUNCTIONAL DESCRIPTION
PRODUCT CHARACTERIZATION
Standard values of nominal resistance are taken from the E192 series for resistors with a tolerance of
±1%,
±0.5%, ±0.25%, ±0.1%.
The values of the E192 series are in accordance with “IEC publication 60063”.
DERATING
The power that the resistor can dissipate depends on the operating temperature; see Fig.2
MOUNTING
Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by
automatic placement systems.
Cylindrical placement can be on ceramic rods and printed-circuit boards (PCBs).
Electrical connection to the circuit is by individual soldering condition.
The end terminations guarantee a reliable contact.
RECOMMEND LAND PATTERN
B
C
A
Type
A (mm)
B (mm)
C (mm)
Page 4 of 11
0207
3.0
1.7
2.4
0204
1.6
1.2
1.6
ASC_MMxxB&C
AUG - 2018
Approval sheet
SOLDERING CONDITION
The robust construction of cylindrical resistors allows them to be completely immersed in a solder bath of 260°C
for 10 seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other
discrete components on the reverse (mixed PCBs).
Surface Mount Resistors are tested for solderability at 235°C during 2 seconds within lead-free solder bath. The
test condition for no leaching is 260°C for 30 seconds. Typical examples of soldering profile and condition that
provide reliable joints without any damage are given in Fig 3. and Table 1.
For Ni/Sn series soldering
Fig. 3 Infrared soldering profile for MELF Resistors
Table 1. Infrared soldering condition for MELF Resistors
Temperature Condition
Average ramp-up rate (217°C to 260°C)
Between 150 and 200°C
> 217°C
Peak Temperature
Time within 245°C
Ramp-down rate (Peak to 217°C)
Time from 25°C to Peak
Exposure Time
Less than 3°C/second
Between 60-120 seconds
Between 60-150 seconds
260ºC +0/-5°C
Min. 30 seconds
Less than 6°C/second
No greater than 480 seconds
Page 5 of 11
ASC_MMxxB&C
AUG - 2018
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