Precision Metal Film Resistor Networks (Balance Resistors)
■Construction
D
L
H
①
②
③
④
⑤
⑥
0.5
0.25
P
Coating color：Black
Marking：Alphanumeric
① Resistive film
② Outer coating resin
③ Solder
④ Ceramic substrate
⑤ Inner electrode
⑥ Terminal
■Features
・
Relative resistance tolerance 0.025% is available.
−6
・
Relative T.C.R. tracking 2×10 /K is available.
・
Excellent in stability and electrical characteristics.
・
Products meet EU-RoHS requirements.
■Dimensions
Type
MRPL03
MRPA03
Dimensions（mm）
L max.
8.5
H max.
6.5
8.5
D max.
2.5
P
2.54±0.2
ℓ
※1
Weight（g）
（1000pcs）
183
256
Network Resistors
3±0.5
■Applications
・
Thermo Controllers, Oscilloscopes, Recorders, Medical Equipment
※1 Length of lead frame (ℓ) : 4.5±0.5mm is also available.
■Type Designation
MRP
Product
Code
L03
Style
L03
A03
E
Absolute T.C.R.
（×10
−6
/K）
E：±25
C：±50
A
T.C.R. Tracking
（×10
−6
/K）
A：2
Y：5
T：10
D
Terminal
Surface Material
D：SnAgCu
103/103
Nominal Resistance
R1/R2
3 digits/3 digits
B
Absolute
Resistance
Tolerance
B：±0.1%
C：±0.25%
D：±0.5%
F：±1%
A
Resistance Ratio
Tolerance
E：0.025%
A：0.05%
B：0.1%
C：0.25%
D：0.5%
※Resistance combination of R1,R2 is standardized to 200/20k½1k/1k½1k/2k½1k/4k½1k/9k½1k/10k½1k/20k½10k/10k½10k/100k½50k/50k½100k/100k
Refer to us for combination of different kinds of resistance except those mentioned above.
Contact us when you have control request for environmental hazardous material other than the substance specified by EU-RoHS.
■Ratings
Type
MRPL03
MRPA03
Power Rating
Element
Package
Absolute T.C.R.
（×10
−6
/K）
E：±25
C：±50
T.C.R. Tracking
（×10
−6
/K）
A：2
（R2/R1≦10）
Y：5
T：10
Resistance
Range
（Ω）
50½100k
Resistance
Tolerance
B：±0.1%
C：±0.25%
D：±0.5%
F：±1%
Resistance Ratio Tolerance
B：0.1%
50Ω½100kΩ
50Ω½100kΩ
50Ω½100kΩ
50Ω½100kΩ
150max.
Max. Working
Voltage
Max. Overload
Voltage
Resistance
Ratio
See below
table
100mW
200mW
100V
200V
Absolute
Resistance
Tolerance
B：±0.1%
C：±0.25%
D：±0.5%
F ：±1%
E：0.025%
50Ω½100kΩ
50Ω½100kΩ
50Ω½100kΩ
50Ω½100kΩ
100max.
A：0.05%
50Ω½100kΩ
50Ω½100kΩ
50Ω½100kΩ
50Ω½100kΩ
100max.
C：0.25%
－
50Ω½100kΩ
50Ω½100kΩ
50Ω½100kΩ
150max.
D：0.5%
－
－
50Ω½100kΩ
50Ω½100kΩ
150max.
R1/R2
Relative Resistance Ratio
Rated Ambient Temperature：＋70℃
Operating Temperature Range：−55℃∼＋125℃
Rated voltage＝
√￣￣￣￣￣￣￣￣￣￣￣￣
Max. working voltage, whichever is lower.
Power Rating×Resistance value or
※Refer to us for manufacturing smaller values of absolute T.C.R..
196
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.
Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.
Malfunction or failure of the products in such applications may cause loss of human life or serious damage.
Malfunction or failure of the products in such applications may cause loss of human life or serious damage.
Oct. 2020
Oct. 2021
www.koaglobal.com
■Derating Curve
Percent rated power ％）
（
100
80
60
40
20
0
-60
-40
-20
0
20
40
60
80 100 120
140
70
125
■Equivalent Circuit Diagram
R1
R2
①
②
③
-55
The left side terminal on the marked surface is Pin No.1.
Ambient temperature (℃)
For resistors operated at an ambient temperature of 70℃ or higher, the power shall be
derated in accordance with the above derating curve.
■Performance
Test Items
Resistance
T.C.R.
Overload Short time）
（
Resistance to soldering heat
Rapid change of temperature
Moisture resistance
Endurance at 70℃
Resistance to solvents
Insulation resistance
Withstand voltage
Performance Requirements
ΔR±
（%＋0.05Ω）
Within specified tolerance
Within specified T.C.R.
0.05
0.1
0.1
0.1
0.1
No abnormality in outer coating and markings
10,000MΩ or above
0.5
Test Methods
25℃
＋25℃/＋65℃
Rated Voltage×2.5 or max. overload vol. whichever is lower, for 5s
350℃±10℃, 3.5s±0.5s
＋0
＋3
－ 5
（30min.）
－ 0
（30min.） cycles
－55 ℃
/＋125 ℃
5
40℃±2℃, 90%½95%RH, 1000h
1.5h ON/0.5h OFF cycle
70℃±2℃, 1000h
1.5h ON/0.5h OFF cycle
Soaking in 2-propanol of 20℃½25℃ for 180s±10s.
500V (d.c.) for 1min. between Terminals and Coating
500V (a.c.) for 1min. between Terminals and Coating
Network Resistors
Network Resistors
■Custom Circuit Examples
Refer to us for the following circuit constructions, resistances, etc.
1
2
n− 1
n
1
2
n− 1
n
1
2
n− 1
n
1
2
3
n− 1 n
■Precautions for Use
・
Ionic impurities such as flux etc. that are attached to these products or those mounted onto a PCB, negatively affect their moisture resistance, corrosion
resistance, etc. The flux may contain ionic substances like chlorine, acid, etc. Please wash them to get rid of these ionic substances especially when using lead-
free solder that may contain much of the said substances for improving a wetting characteristic. Using RMA solder or RMA flux, or well-washing is needed. Also,
attaching ionic substances such as perspiration, salt etc. by storage environments or mounting conditions/environments negatively affects their moisture
resistance, corrosion resistance etc. Please wash them to remove the ionic substances when they are polluted.
＋
−
・
Pay attention to use when the components are polluted by ionic impurities like sodium (Na ), chlorine (Cl ) etc. included in perspiration and saliva, because it
leads to electric erosion.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.
Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.
Malfunction or failure of the products in such applications may cause loss of human life or serious damage.
Malfunction or failure of the products in such applications may cause loss of human life or serious damage.
