RCR
anti-surge power type leaded resistor
environmental applications
Derating Curve
Notice of Surge Load
100
Surge withstanding load voltage for the resistors cannot be guaranteed when
the undermentioned 4 items get to a remarkable overload in comparison with
the conditions shown by surge withstanding voltage in Anti-surge
80
characteristics. Please contact KOA in advance if such a case is anticipated.
1. Peck voltage to be applied
2. Pulse width
60
40
3. Conditions of protecting insulation around the resistor
4. Situation of proximity conductivity object
20
0
10kV
For example: In the figure, a metal wire is placed
less than 5mm away from the resistor body,
-60 -40 -20
-55
0
20 40 60 80 100 120 140 160
70
Ambient Temperature
(°C)
155
About 5mm
Metal Wire
Discharge
there is such a case that causes an electric
discharge by a surge load 10kV and then
destroys the outer coating.
For resistors operated at an ambient temperature
of 70°C or above, a power rating shall be derated
in accordance with the above derating curve.
Performance Characteristics
Requirement ∆ R ±(% + 0.05Ω)
Parameter
Resistance
Limit
Typical
Test Method
Within regulated tolerance
—
Measuring points are 10mm ± 1mm from the end cap
Type
RCR16
RCR25
T.C.R.
Resistance Range
±200ppm/°C 100kΩ - 5.1MΩ
±350ppm/°C
±500ppm/°C
±350ppm/°C
100kΩ - 33MΩ
3.3Ω - 91kΩ
RCR50 (+)
T.C.R.
100kΩ - 33MΩ
100kΩ - 33MΩ
100kΩ - 56MΩ
—
Room temperature/100°C up
RCR50EN ±350ppm/°C
RCR60
±350ppm/°C
RCR75
±350ppm/°C 100kΩ - 100MΩ
RCR100
±200ppm/°C
100KΩ - 33MΩ
Rated voltage x 2.5 or maximum overload voltage
for 5 seconds, whichever is less
Overload
1%
0.5%
0.5%
260°C ± 5°C, 10 seconds ± 1 second or 350°C ± 10°C,
3.5 seconds ± 0.5 seconds
Resistance to Solder Heat
1%
Terminal Strength
No mechanical damage
1%
—
Twist 360°, 5 times
Rapid Change of Temperature
0.5%
-55°C (30 minutes)/+155°C (30 minutes), 5 cycles
40°C ± 2°C, 90-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
RCR16, 25, 50 (+), 60: W; RCR75, 100: Wx0.1
Moisture Resistance
Endurance @ 70°C
5%
5%
2.5%
2.5%
70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
No visible damage to protective coating
and marking
Isopropyl alcohol with ultrasonic washing, 2 minutes
Power: 0.3W/cm2, f: 28kHz, Temperature: 35°C ± 5°C
Resistance to Solvent
—
Discharge test: 2kV - 10kV, 0.01µF capacitor discharge
pulse, 10 times (1 pulse/5 seconds maximum)
RCR50EN,
RCR60, RCR75,
Type RCR16 RCR25 RCR50, RCR50+
RCR100
3.3Ω - 6.2Ω: 10kV
Surge Withstanding
10%
20%
2.5%
6.8Ω - 10Ω: 7kV
Applied
Voltage
2kV
3kV 11Ω - 9.1kΩ: 5kV
10kΩ - 91kΩ: 7kV
10kV
100kΩ - 33MΩ: 10kV
EN60065 Test
(RCR50EN, RCR60 only)
Discharge test: 10kV, 1000pF capacitor discharge pulse,
50 times (1 pulse/5 seconds maximum)
—
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
12/18/12
117
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com