TA-I
1. Scope :
High Power
Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
page
2011/06/03
1/9
This specification applies for the RMH25 series of thick film chip resistors made by TA-I.
Conductor :
Over Coat (Color : Black)
(Lead-free or with lead )
2. Construction:
Sn Plating
Resistive Element
Ceramic Substrate
Ni Plating
3. Type Designation:
RMH
Product Code
25
Size
J
Tolerance
E
Packaging
101
Nominal
RMH : High Power
Chip Resistor
Power Rating
Resistance
J -
±5%
25-2512(6432)
2W
F -
±1%
E-Emboss Tape
3 digits, e.g.,:
(E-24) 101 = 100Ω
4 digits, e.g.,:
(E-96) 43R2 = 43.2Ω
TA-I TECHNOLOGY CO., LTD
TA-I
4.
Dimensions:
High Power
Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
page
2011/06/03
2/9
101
UNIT: mm
Type
RMH25
L
6.30±0.20
W
3.20±0.20
C
0.60±0.30
d
0.50±0.25
t
0.60±0.10
5. Ratings & Characteristics :
Type
Power
Rating
at 70℃
Rated
Voltage
Max.
Working
Voltage
Max.
Over-
Load
Voltage
Resistance Range(Ω)
T.C.R
(PPM/℃)
F(±1%)
E-96
10Ω-100Ω
10Ω-100Ω
1Ω-9.1Ω
1Ω-9.1Ω
J(±5%)
E-24
±100
RMH25
2W
Refer 5.2
200V
400V
±200
±400
2. Operating Temp(℃): : -55℃
〜
+125℃
Note :
Except for the above standardized products, we also provide the customized products.
TA-I TECHNOLOGY CO., LTD
TA-I
High Power
Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
page
2011/06/03
3/9
5.1Derating Curve :
For resistors operated at ambient temperature over 70℃ , power rating shall be derated in
accordance with figure 1.
P max.
100
Power ratio ( % )
50
0
-55
50
70
100
125
Ambient
Figure 1
Temp. (
C
)
5.2 Rated Voltage:
The rated voltage is calculated by the following formula:
E=
P*R
E=
Rated Voltage(V)
P=
Rated Power(W)
R=
Resistance Value
(Ω)
E.G. : What is RMH25JE101 the rated voltage ?
RMH25JE101
P:2.0W
; R:101 = 100Ω
E=
2.0(W) * 100(Ω)
= 14.14 (V)
TA-I TECHNOLOGY CO., LTD
TA-I
Test Items
Temperature Coefficient
of Resistance
High Power
Chip Resistors
(RMH25 series standard )
Reference
standard
IEC60115-1-4.8
JIS-C5201-4.8
Document No.
TRMH-250S001A
Issued date
page
2011/06/03
4/9
6. Reliability Tests:
Condition of Test
-55〜 +125
℃
Test Limits
△R
Refer 5.0
Short Time Overload
IEC60115-1-4.13
2.5 X rated voltage
JIS-C5201-4.13
for 5 sec
±(1%
+ 0.05Ω )
Intermittent Overload
3.0 X rated voltage or Max Overloading
±
(5.0% + 0.1Ω)
EC60115-1-4.39
voltage ,1sec “ON” , 25sec “OFF” , 10000 cycles
JIS-C5201-4.39
(Remarks : 0201-NA , 0402 2.5 X RCWV * )
Load Life
IEC60115-1-4.25.1 1000 hours at rated voltage, 70℃ , 1.5hours
JIS-C5201-4.25.1 “ON “, 0.5hour “OFF”
1%:±(1.0%+0.05Ω)
5%:±(3.0%+0.1Ω)
Load Life with Humidity
IEC60115-1-4.24 1000 hours at rated voltage , 40±2℃,
JIS-C5201-4.24
90~95% RH 1.5hours “ON “, 0.5hour “OFF”
1%:±(1.0%+0.05Ω)
5%:±(3.0%+0.1Ω)
Rapid Change of Temperature
IEC60115-1-4.19
-55℃ (30 min. ) / +155
℃(30
min. ) 5 cycles
JIS-C5201-4.19
1%:±(0.5%+0.05Ω)
5%:±(1.0%+0.05Ω)
Solderability
IEC60115-1-4.17 245±5℃ solder, 2±0.5 sec dwell.
JIS-C5201-4.17 Solder : Sn96.5 / Ag3.0 / Cu0.5
At least 95% of surface area
of electrode shall be covered
with new solder.
1%:±(0.5%+0.05Ω)
5%:±(1.0%+0.05Ω)
Robustness of Termination
(Bending)
Dielectric Withstanding
Voltage (Voltage Proof)
Insulation Resistance
IEC60115-1-4.33
2mm deflection
JIS-C5201-4.33
Applying voltage :
0201 : 50V , 0402 & 0603 : 300V
500V for a minute .
IEC60115-1-4.7
JIS-C5201-4.7
IEC60115-1-4.6
JIS-C5201-4.6
The other
No abnormalities such as
flashover, burning dielectric
breakdown shall appear.
≧1GΩ
Applying voltage 100V for 1 minute.
Remark : 0201 50V
Resistance to Dry Heat
IEC60115-1-4.23.2
125±5℃ for 96±4Hrs
JIS-C5201-4.23.2
1%:±(1.0%+0.05Ω)
5%:±(2.0%+0.1Ω)
Resistance to Solder Heat
IEC60115-1-4.18
270
±5℃
solder , 10
±1
sec dwell .
JIS-C5201-4.18
1%:±(0.5%+0.05Ω)
5%:±(1.0%+0.05Ω)
Note* : RCWV : Rated continuous working voltage
.
TA-I TECHNOLOGY CO., LTD
TA-I
7. Marking :
High Power
Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
page
2011/06/03
5/9
7.1
±5%(E24)
Resistance value is expressed by 3 digits, the first two digits represent the significant figures of
nominal resistance value inΩ, and the third digit represents exponent for base of 10.
E.G. :,
470
= 47×10
0
= 47Ω
7.2
±1%
(E96 )
Resistance value is expressed by 4 digits or 3digits , the first three digits represent the significant
figures of nominal resistance value inΩ, and the fourth digit represents exponent for base of 10.
E.G. :
1000 = 100×10
0
= 100Ω
8. Taping & Reel :
8.1 Taping Dimensions
8.1.1
4 mm pitch Emboss :
Packing
Paper
Type
RMH25
A
3.6±0.2
B
W
F
E
P
1
P
2
P
0
D
0
T
+0.1
6.9±0.2 12.0±0.2 5.5±0.05 1.75±0.1 4.0±0.1 2.0±0.05 4.0±0.05
ψ1.5
0.85±0.15
-0
Package
Type
RMH
Size
25
Emboss Plastic Tape
4 mm pitch
4000
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