TA-I
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
1 / 9
TA-I TECHNOLOGY CO., LTD
Ceramic Substrate
1. Scope :
This specification applies for the RMH25 series of thick film chip resistors made by TA-I.
2. Construction:
3. Type Designation:
RMH 25 J E 101
Product Code Size Tolerance Packaging Nominal
RMH : High Power Power Rating Resistance
Chip Resistor
J - ±5% E-Emboss Tape 3 digits, e.g.,:
25-2512(6432) 2W F - ±1% (E-24) 101 = 100Ω
4 digits, e.g.,:
(E-96) 43R2 = 43.2Ω
Ni Plating
Resistive Element
Conductor :
(Lead-free or with lead )
Sn Plating
Over Coat (Color : Black)
TA-I
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
2 / 9
TA-I TECHNOLOGY CO., LTD
4. Dimensions:
UNIT: mm
Type
L
W
C
d
t
RMH25
6.30±0.20
3.20±0.20
0.60±0.30
0.50±0.25
0.60±0.10
5. Ratings & Characteristics :
Type
Power
Rating
at 70℃
Rated
Voltage
Max.
Working
Voltage
Max.
Over-
Load
Voltage
T.C.R
(PPM/℃)
Resistance Range(Ω)
F(±1%)
E-96
J(±5%)
E-24
RMH25
2W
Refer 5.2
200V
400V
±100
10Ω-100Ω
±200
10Ω-100Ω
±400
1Ω-9.1Ω
1Ω-9.1Ω
2. Operating Temp(℃): : -55℃ 〜 +125℃
Note : Except for the above standardized products, we also provide the customized products.
101
TA-I
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
3 / 9
TA-I TECHNOLOGY CO., LTD
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
Temp. (
C )
Figure 1
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
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
4 / 9
TA-I TECHNOLOGY CO., LTD
6. Reliability Tests:
Test Items
Reference
standard
Condition of Test
Test Limits △R
Temperature Coefficient
of Resistance
IEC60115-1-4.8
JIS-C5201-4.8
-55〜 +125 ℃
Refer 5.0
Short Time Overload
IEC60115-1-4.13
JIS-C5201-4.13
2.5 X rated voltage for 5 sec
±(1% + 0.05Ω )
Intermittent Overload
EC60115-1-4.39
JIS-C5201-4.39
3.0 X rated voltage or Max Overloading
voltage ,1sec “ON” , 25sec “OFF” , 10000 cycles
(Remarks : 0201-NA , 0402 2.5 X RCWV * )
± (5.0% + 0.1Ω)
Load Life
IEC60115-1-4.25.1
JIS-C5201-4.25.1
1000 hours at rated voltage, 70℃ , 1.5hours
“ON “, 0.5hour “OFF”
1%:±(1.0%+0.05Ω)
5%:±(3.0%+0.1Ω)
Load Life with Humidity
IEC60115-1-4.24
JIS-C5201-4.24
1000 hours at rated voltage , 40±2℃,
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
JIS-C5201-4.19
-55℃ (30 min. ) / +155 ℃(30 min. ) 5 cycles
1%:±(0.5%+0.05Ω)
5%:±(1.0%+0.05Ω)
Solderability
IEC60115-1-4.17
JIS-C5201-4.17
245±5℃ solder, 2±0.5 sec dwell.
Solder : Sn96.5 / Ag3.0 / Cu0.5
At least 95% of surface area
of electrode shall be covered
with new solder.
Robustness of Termination
(Bending)
IEC60115-1-4.33
JIS-C5201-4.33
2mm deflection
1%:±(0.5%+0.05Ω)
5%:±(1.0%+0.05Ω)
Dielectric Withstanding
Voltage (Voltage Proof)
IEC60115-1-4.7
JIS-C5201-4.7
Applying voltage :
0201 : 50V , 0402 & 0603 : 300V The other
500V for a minute .
No abnormalities such as
flashover, burning dielectric
breakdown shall appear.
Insulation Resistance
IEC60115-1-4.6
JIS-C5201-4.6
Applying voltage 100V for 1 minute.
Remark : 0201 50V
≧1GΩ
Resistance to Dry Heat
IEC60115-1-4.23.2
JIS-C5201-4.23.2
125±5℃ for 96±4Hrs
1%:±(1.0%+0.05Ω)
5%:±(2.0%+0.1Ω)
Resistance to Solder Heat
IEC60115-1-4.18
JIS-C5201-4.18
270 ±5℃ solder , 10 ±1 sec dwell .
1%:±(0.5%+0.05Ω)
5%:±(1.0%+0.05Ω)
Note* : RCWV : Rated continuous working voltage .
TA-I
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
5 / 9
TA-I TECHNOLOGY CO., LTD
7. Marking :
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 = 47×100 = 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 = 100×100 = 100Ω
8. Taping & Reel :
8.1 Taping Dimensions
8.1.1 4 mm pitch Emboss :
Packing
Type
A
B
W
F
E
P1
P2
P0
D0
T
Paper
RMH25
3.6±0.2
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
+0.1
ψ1.5
-0
0.85±0.15
Package
Type Size
Emboss Plastic Tape
4 mm pitch
RMH
25
4000
TA-I
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
6 / 9
TA-I TECHNOLOGY CO., LTD
8.2 Reel Specifications:
UNIT: mm
Type
ψA
ψB
ψC
W
T
RMH25
178.0 ± 2.0
60.0 ± 1.0
13.0 ± 1.0
13.0 ± 1.0
15.5 ± 1.0
8.4. Peel –off force :
Peel –off force of paper and blister tape is in accordance with “JIS-C5202 ”
that is , 0.1 to 0.7 N at a peel-off speed of 300 mm / minute.
pull
top cover tape 300 mm/min
10〜15∘ standard: 0.1 ~ 0.7 N
carrier tape
TA-I
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
7 / 9
TA-I TECHNOLOGY CO., LTD
9. Label :
9.1 Manufacture Label :
Date Code Resistance Tolerance Type
Lot No:
9.2 Customer Label( By customer request ):
Lead-Free Products
Product Spec.
Customer No:
Date
Year Month
10. Recommended land patterns :
Land pattern
Type Size
Dimension ( mm )
a
b
c
RMH
25 (2512 )
3.6~4.0
7.6~8.6
2.3~3.5
QTY: 4000 PCS
102 J
00890166K- 0008 RMH25
TA-I TECH LEAD FREE
2512 5%(E) 1KΩ
105A702723 RMH25JE102
04.05.21
TA-I
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
8 / 9
TA-I TECHNOLOGY CO., LTD
11. Recommend IR – Reflow profile : (solder : Sn96.5 / Ag3 / Cu0.5)
Peak : 250
0
5
℃ , 5 sec
Pre – heat Zone : 150 to 180 ℃, 90±30 sec
Soldering Zone : 230℃ or higher , 30±10 sec
12. Storage Conditions:
Temperature : 5 to 35 ℃
Related Humidity :40 to 75% RH
13. Shelf Life:
2 years from manufacturing date.
14. ECN :
Engineering Change Notice: The customer will be informed with ECN if there is significant
modification on the characteristics and materials described in Approval Sheet.
TA-I
High Power Chip Resistors
(RMH25 series standard )
Document No.
TRMH-250S001A
Issued date
2011/06/03
page
9 / 9
TA-I TECHNOLOGY CO., LTD
15. Manufacturing Country & City :
TA-I TECHNOLOGY CO., LTD. ( Taiwan– Tao Yuan )
Tel: 886-3-3246169 Fax : 886-3-3246167
Associated companies :
(1) FORTUNE TASK RESISTOR FACTORY ( China – Dongguan )
Tel : 86-769-8339-4790〜3 Fax : 86-769-8339-4794
(2) TA-I TECHNOLOGY (DONGGUAN ) CO., LTD. ( China –Dongguan )
Tel : 86-769-8339-4790〜3 Fax : 86-769-8339-4794
(3) TA-I TECHNOLOGY ( SU ZHOU ) CO., LTD. ( China – Su Zhou)
Tel :86- 512-63457879 Fax : 86-512-63457869
(4) TAI OHM ELECTRONICS ( M ) SDN. BHD. ( Malaysia – Pulaupinang )
Tel :604- 3900480 Fax : 604-3901481
(5) P.T.TAI ELECTRONICS Indonesia ( Indonesia – Jakarta )
Tel :002-62-21-44820254 Fax : 002-62-21-44820256
