HIGH RESISTANCE
RK
RK1/2G
Coat Insulated Glazed Metal Film Fixed Resistors
Discharge Path Resistors
■Construction
C
①
②
③
④
⑤
⑥
EU
RoHS
L
⑦
⑤ Electrode cap
⑥ Lead wire
⑦ Resistive film
φd
D
Coating color：Light gray
Marking：Color code
① Marking
② Insulation coating
③ Trimming line
④ Ceramic core
■Features
・
Respondable to resistance tolerance ±1% and T.C.R. ±100×
−6
10 /K.
・
Resistors up to high resistance range in small sizes are
available.
・
Highly stable against environmental conditions and overload.
・
Products meet EU-RoHS requirement. EU-RoHS regulation
is not intended for Pb-glass contained in resistor element.
■Dimensions
Type
RK
RK
RK
RK
1/4
1/2
1
1/2G
※1
L
6.3±0.5
9.5±1.0
15.5±1.0
9.5±1.0
C Max.
7.1
11.1
18.3
11.1
Dimensions（mm）
D
d Nominal）
（
2.3±0.3
0.6
3.5±0.4
5.5±0.5
0.8
3.5±0.4
0.6
※2
ℓ
Weight
（g）
（1000pcs）
250
380
1340
380
24 Min.
38±3
24 Min.
※1 Discharge path resistor
※2 Lead length changes depending on taping and forming type.
■Approval Awarded
・
UL1676 ½-UL（CSA-C22.2 No.1-M94）（File No.E159326）Recognized.
Products Discharge Path Resistors RK 1/2GC
■Type Designation
Example
RK
Product
Code
■Reference Standards
・EIAJ
RC-2128
1/4
Power
Rating
1/4：0.25W
1/2：0.5W
1：1W
B
C
T52
Taping &
Forming
See table
below
A
Packaging
A：AMMO
R：REEL
Nil：BOX
106
Nominal
Resistance
F：4 digits
G, J：3 digits
J
Resistance
Tolerance
F：±1％
G
：±2％
J：±5％
T.C.R.
Terminal
（×10
−6
/K） Surface Material
C：SnCu
D：±100
L：±200
G：±250
B：±350
Contact us when you have control request for environmental hazardous material other than the substance specified by
EU-RoHS.
For further information on taping and forming, please refer to APPENDIX C on the back pages.
■Taping & Forming Matrix
Type
High Voltage Type Resistors
RK1/4□C
RK1/2□C
RK1□C
RK1/2GC
□ :T.C.R.
T26
○
－
－
－
Axial Taping
T52
○
○
－
○
T521
－
－
○
－
U Forming
U
○
－
－
－
L Forming
L10A
L20A
○
－
－
－
－
○
－
－
M10F
－
－
－
Ｍ10
M10R
－
－
－
Ｍ Forming
M12.5
M12.5R
M12.5F
－
M12.5F
－
M15F
－
M15F
M15
－
M15R
－
M15R
■Ratings
Type
RK1/4DC
RK1/4LC
RK1/4BC
RK1/2DC
RK1/2LC
RK1/2BC
RK1BC
RK1/2GC
※3
Power
Rating
0.25W
T.C.R.
（×10
−6
/K）
D:±100
L:±200
B:±350
D:±100
L:±200
B:±350
B:±350
G:±250
Resistance Range（Ω）
F:±1％
G:±2％
J:±5％
E24・E96
E24
E24
3.09M½25M
－
－
－
3.3M½33M
.
3.3M½33M
.
100k½25M
100k½33M
.
100k½33M
.
5.11M½33M
－
－
－
6.2M½33M
.
6.2M½33M
.
100k½35M
100k½51M
.
100k½51M
.
100k½51M
100k½100M
100k½100M
－
－
1M½12M
Max.
Working
Voltage
500V
Max.
Overload
Voltage
700V
Dielectric
Withstanding
Voltage
500V
Taping & Q'ty/AMMO
（pcs）
T26A
T52A
T521A
－
2,000
－
－
2,000
－
－
－
－
－
－
－
－
500
－
2,000
－
0.5W0
1W0.0
0.5W0
700V
1000V
350V
1000V
1500V
700V
700V
1000V
700V
※3 Discharge path resistor
Rated Ambient Temperature :＋70℃
Operating Temperature Range :−55℃∼＋155℃
Rated voltage＝
√￣￣￣￣￣￣￣￣￣￣￣￣
or Max. working voltage, whichever is lower.
Power Rating×Resistance value
148
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
負荷経減曲線
■Derating Curve
Percent rated power ％）
（
100
80
60
40
20
0
-60 -40 -20 0 20 40 60 80 100120140 160
-55
70
155
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
Performance Requirements
ΔR±
（％＋0.05Ω）
Limit
Typical
—
—
0.6：RK
1：RK1/2G
0.5：RK
1：RK1/2G
—
—
25℃
＋ 25℃/＋ 125℃
Rated voltage×2.5 or Max. overload vol., whichever is lower, for 5s
260℃±5℃, 10s±1s or 350℃±10℃, 3.5s±0.5s
1 min.
100V, 1 min.
－55℃
（30min.）
/＋155℃
（30min.）5 cycles
40℃±2℃, 90%½95%RH, 1000h
1.5h ON/0.5h OFF cycle
70℃±2℃, 1000h
1.5h ON/0.5h OFF
The resistor shall be immersed for 5s in IPA.
Discharge from 1000pF capacitor 50 pulses. Interval 2.5s
Charge voltage : 1.25kV (RK1/4), 2.5kV (RK1/2) and 6kV (RK1).
Test Methods
■外½寸法
Test Items
Resistance
T.C.R.
Overload
（Short time）
Resistance to soldering heat
Dielectric withstanding voltage
Insulation resistance
Rapid change of temperature
Moisture resistance
Endurance at 70℃
Resistance to solvent
Impulse
Ｃ
Within specified tolerance
Within specified T.C.R.
1：RK
2.5：RK1/2G
1：RK
5：RK1/2G
½
Ｌ
No breakdown
Not less than 10,000MΩ
1：RK
5：RK1/2G
5：RK
10：RK1/2G
5：RK
10：RK1/2G
No abnormality in appearance.
Marking shall be easily legible.
No such abnormalities as short-circuit,
burnout, breakdown, etc.
Ｄ
0.5：RK
1：RK1/2G
2：RK
5：RK1/2G
2：RK
5：RK1/2G
—
—
High Voltage Type Resistors
High Voltage Type Resistors
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
149
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