Thick Film High Voltage
Chip Resistors(for 1206)
1. Scope :
Document No.
Revise Date
page number
TRH-120S002D
2007/11/20
1 / 10
This specification applies for thick film high voltage chip resistors made by TA-I.
Conductor :
2. Construction:
Over Coat (Color : Green)
(Lead-free or with lead )
Sn Plating
Resistive Element
Ceramic Substrate
Ni Plating
3. Type Designation:
RH
Product Code
RH : High voltage
12
Size
Power Rating
F
Tolerance
TN
Packaging
4993
Nominal
Resistance
12-1206(3216) 1/4W
J-
±5%
G-
±2%
F-
±1%
TN-Lead
Free &
Paper Tape
e.g.,
4993=499kΩ , 1%
106=10MΩ2% ,5%
TA-I TECHNOLOGY CO., LTD
Thick Film High Voltage
Chip Resistors(for 1206)
4. Dimensions:
Document No.
Revise Date
page number
TRH-120S002D
2007/11/20
2 / 10
UNIT: mm
Type
RH12
L
3.10
±0.20
W
1.55
±0.10
C
0.40
±0.25
d
0.40
±0.20
t
0.55
±0.10
5.Ratings & Characteristics :
Characteristics
Power Ratings (W)
Resistance Value (Ω)
T.C.R (ppm/
o
C)
Operation Temperature Range (
o
C)
Resistance Tolerance (%)
Maximum Working Voltage (V)
Maximum Overload Voltage (V)
Note :
Refer 5.2
Rating
Voltage
Feature
RH12
1/4W
47Ω~22MΩ
±
200
Measurement Method
JIS Code 3A / JIS Code 3D
Refer to JIS C 5202 5.1
Refer to JIS C 5202 5.2
-55 ~ +125
±
1,
±
2,
±
5
JIS C 5201 4.2.5
500
1000
Except for the above standardized products, we also provide the customized products.
TA-I TECHNOLOGY CO., LTD
Thick Film High Voltage
Chip Resistors(for 1206)
Document No.
Revise Date
page number
TRH-120S002D
2007/11/20
3 / 10
5.1 Derating 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
Figure 1
50
70
100
155
Ambient
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 RH12FTN 3003 the rated voltage ?
RM12FTN3003 P=1/4W ; R:3003=300KΩ=300,000Ω
E=√
1/4(W)*300000 (Ω)
= 273.86 V
Remark : However , it shall not exceed the maximum rated voltage .
TA-I TECHNOLOGY CO., LTD
Thick Film High Voltage
Chip Resistors(for 1206)
6. Reliability Tests:(
As specified in JIS C 5202
)
Test Items
Reference standard
Condition of Test
Document No.
Revise Date
page number
TRH-120S002D
2007/11/20
4 / 10
∆
R
R
Test Limits
Visual examination
Checked by visual examination .
The marking shall be legible ,
as checked by visual examination
Temperature Coefficient of
Resistance
Dielectric
Withstanding
Voltage
( Voltage Proof )
JIS-C5202-5.2
-55 ~ +125
℃
Refer to paragraph 5
JIS-C5202-5.7
500Va. c., voltage , 1 min .
No abnormalities such as
flashover , burning dielectric
breakdown shall appear .
Insulation Resistance
JIS-C5202-5.6
100V voltage , 1 min .
≧1G
Solderability
JIS-C5202-6.11
245
±5℃
solder, 2
±0.5
sec dwell.
Solder : Sn96.5/Ag3/Cu0.5
At least 95% of surface area
of electrode shall be covered with
new solder.
1% :
±1
% + 0.05
Ω
5% :
±2
% + 0.05
Ω
1% :
±0.5
% + 0.05
Ω
5% :
±1
% + 0.05
Ω
Short Time Overload
JIS-C5202-5.5
2.5 X rated voltage, 5s
Resistance to Soldering Heat
JIS-C5202-6.10
260
±5℃
solder , 10
±1
sec dwell .
Rapid Change of Temperature
JIS-C5202-7.4
-55℃ (30 min. ) / +125
℃(30
min. )
5 cycles
1000 hours at rated power , 70℃ ,
1.5hours “ON “, 0.5hour “OFF”
1% :
±1
% + 0.05
Ω
5% :
±3
% + 0.05
Ω
Load Life
JIS-C5202-7.10
Solubility resistance
JIS-C5202-6.9
Ultrasonic for 1 minute
Solvent : isopropyl alcohol
Marking shall be legible.
1% :
±1
% + 0.05Ω
5% :
±3
% + 0.05Ω
Resistance to Dry Heat
JIS-C5202-7.2
155±5℃ for 96±4Hrs
Low Temperature Operation
MIL-R-55342DR
-Para 4.7.4
At –65 ( +0 / -5 )
℃
for 1 hr ,
RCWV applied
For 45 ( +5 / -0 ) minutes .
1% :
±0.5
% + 0.05Ω
5% :
±1
% + 0.05Ω
Robustness
(Bending)
of
Termination
JIS-C5202—6.1
3mm deflection
1% :
±0.5
% + 0.05Ω
5% :
±1
% + 0.05Ω
Moisture Resistance Heat
MIL-STD-202F-
MIL-STD-202F-
Method 106F
IEC 60115-1 4.24.2
42 cycles , total 1000 hrs .
1% :
±0.5
% + 0.05Ω
5% :
±2
% + 0.05Ω
TA-I TECHNOLOGY CO., LTD
Thick Film High Voltage
Chip Resistors(for 1206)
Document No.
Revise Date
page number
TRH-120S002D
2007/11/20
5 / 10
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.
Ex. 106 =10×10
6
=10000000Ω=10MΩ
7.2
±1%
(E96 )
Resistance value is expressed by 4digits, the first three digits represent the
significant figures of nominal resistance value inΩ, and the fourth digit
represents exponent for base of 10.
Ex. 4993 =499 ×10
3
= 499000Ω= 499kΩ
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