CN-15 Series 15mm Cermet Preset Potentiometers
15mm cermet preset potentiometer with thick film resistance track on ceramic substrate
Resistance range 100Ω to 4.7MΩ (E6 series values)
Maximum power dissipation 1.0W at 70°C; derates to 50% at 100°C
Maximum working voltage 250V
Tolerance ±20% for values up to 680kΩ; ±30% above 680kΩ
Temperature coefficient of resistance (TCR) ±300 × 10⁻⁶/°K
Linear (taper A) resistance characteristic
Climatic category 55/125/56
Available in two mounting configurations: horizontal (CN-15.1) and vertical (CN-15.2)
All terminals suitable for PCB mounting
What are the CN-15 Series 15mm Cermet Preset Potentiometers?
The CN-15 is a 15mm cermet preset potentiometer manufactured with a thick film resistance track deposited on a ceramic substrate. This construction combines the stability and temperature resilience of a ceramic base with the accuracy and long-term reliability of cermet resistive technology. The linear taper characteristic ensures a predictable, proportional relationship between wiper position and output resistance, making the CN-15 well suited to precision trimming and calibration tasks.
The terminal arrangement follows a standard three-terminal layout: terminals a and c serve as the end connections across the full resistance track, while terminal b is the central terminal connected to the sliding wiper. All three terminals are configured for direct PCB insertion, supporting clean integration into professional circuit board assemblies without additional wiring or adapters.
The resistance range spans 100Ω to 4.7MΩ using E6 preferred values, providing broad coverage for signal-level trimming and bias adjustment applications. Resistance tolerance is ±20% for values at or below 680kΩ, widening to ±30% for higher values, reflecting the practical limits of cermet deposition at the upper end of the range. The maximum rated power dissipation is 1.0W at an ambient temperature of 70°C, with a 50% derating applied at 100°C to ensure long-term reliability under elevated thermal conditions. Maximum working voltage is 250V, confirming suitability for line-referenced circuits in industrial and professional equipment.
The TCR of ±300 × 10⁻⁶/°K defines the drift in resistance over temperature, a critical parameter for applications where the trimmed value must remain stable across operating temperature variations. The CN-15 meets climatic category 55/125/56, indicating qualification across a −55°C to +125°C temperature range with humidity endurance testing. Two physical variants are offered: the CN-15.1 in a horizontal mounting orientation with 10 × 15mm pin spacing, and the CN-15.2 in a vertical orientation with 10 × 5mm pin spacing, both adjusted using a standard flat-blade screwdriver. Potentiometers are marked with resistance value and date of manufacture and are supplied in bulk plastic bag and carton box packaging.
CN-15 Series 15mm Cermet Preset Potentiometers Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: CN-15
Resistor type: Variable
Description: 15mm, trimming cermet potentiometer
Power Rating: 1W
Resistance (Ω): E6, 100~4.7M
Tolerance (%): ±20, ±30
TCR (ppm/C): 300
Applications of the CN-15 Series 15mm Cermet Preset Potentiometers
Where RARA variable resistors are deployed in the field.
Precision bias and offset trimming in analog signal conditioning circuits
Gain and sensitivity adjustment in instrumentation and measurement equipment
Threshold and reference voltage setting in industrial control and automation systems
Calibration trimming in professional audio, video, and communications equipment
Feedback network tuning in power supply and voltage regulation circuits
Operating point adjustment in sensor interface and transducer conditioning circuits
Fine resistance trimming in test and measurement equipment requiring periodic re-calibration
Filter frequency and Q-factor adjustment in active filter designs
Balance and null adjustment in bridge and differential measurement circuits
General-purpose preset resistance control in professional and industrial PCB assemblies
Related Products of the CN-15 Series 15mm Cermet Preset Potentiometers
Model: PC-199
Resistor type: Variable
Description: 19mm, hermetic cermet potentiometer
Power Rating: 1W
Resistance (Ω): 100~2.2M
Tolerance (%): ±10, ±20, ±30
Model: SP
Resistor type: Variable
Description: 29mm, carbon single turn potentiometer
Power Rating: 1W
Resistance (Ω): 10kR (E6)
Tolerance (%): ±10
Model: CW-18
Resistor type: Variable
Description: 18.5mm, hermetic cermet potentiometer
Power Rating: 1W
Resistance (Ω): 100~2.2M
Tolerance (%): 20, ±30
TCR (ppm/C): 300
Model: DM
Resistor type: Variable
Description: Wire wound potentiometer
Power Rating: 0.75W
Resistance (Ω): 22~47k
Tolerance (%): ±2.5, ±5, ±10
Why Choose RARA Variable Resistors
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
Full Spectrum Coverage
From 0.1W carbon signal potentiometers to 3000W industrial wire wound rheostats — RARA covers the complete variable resistor spectrum from a single ISO 9001 certified supplier.
02
Hermetic Sealed Options
PC-199 and CW-18 hermetically sealed cermet models resist moisture, dust, and contamination — extending service life in outdoor, marine, and industrial environments where standard potentiometers degrade rapidly.
03
Precision Wire Wound
DM, DOW, and DG precision wire wound potentiometers deliver the accuracy and repeatability needed for calibration, instrumentation, and closed-loop feedback applications.
04
Global Track Record
Trusted by Siemens, Rockwell, Schneider Electric, and Hanwha — deployed in industrial control and power regulation systems across six continents.
