DG Series Precision Wirewound Potentiometers
Precision single-turn wirewound potentiometer with 310° mechanical rotation angle
Power rating 2W
Exceptionally high voltage limit of 750V AC — the highest in the precision wirewound potentiometer range
Resistance range exclusively covers low-resistance values: 22Ω, 33Ω, 47Ω, 68Ω, 100Ω, 150Ω, 220Ω, 330Ω, 470Ω, 680Ω, 1kΩ, 1.5kΩ, 2.2kΩ, and 3.3kΩ
Resistance tolerance ±10% for values at or below 100Ω; ±5% or ±10% for values above 100Ω
Climatic category 25/085/04
Supplied in bulk plastic bag and carton box packaging
What are the DG Series Precision Wirewound Potentiometers?
The DG is a precision single-turn wirewound potentiometer with a 310° mechanical rotation arc, distinguished within the precision wirewound range by two defining characteristics: a voltage limit of 750V AC and a resistance range restricted entirely to low-impedance values from 22Ω to 3.3kΩ. These two properties are directly related. Low-resistance wirewound potentiometers are inherently capable of supporting high voltage across their terminals provided the physical construction and insulation system are rated accordingly, and the DG’s 750V AC voltage limit — more than seven times the 100V AC limit of the DM multi-turn and DOW single-turn types — reflects a construction specifically engineered for use in high-voltage circuits where a precision adjustable resistance element is required.
The resistive element is formed by winding a precision resistance wire onto a suitable former, providing the low-noise, thermally stable, and long-term drift-resistant performance characteristic of wirewound construction. Across the full 310° single-turn travel, the wiper traverses the wound resistance track, giving the operator direct proportional control of the output resistance from zero up to the full rated value. The 14 resistance values in the range are arranged in a fine-grained sequence of preferred values across the 22Ω to 3.3kΩ span — denser than E6 spacing at the lower end — giving specifiers precise impedance matching capability for low-resistance divider, load, and current-sense circuit applications.
The power rating of 2W places the DG between the DM series (0.75W) and the DOW series (4W) in terms of dissipation capability, and its combination of 2W and 750V AC defines an operating envelope that neither of those types can cover. In practical terms, this means the DG can be used directly in circuits where mains-voltage or higher-voltage DC bus potentials are present, without requiring an external isolation barrier or voltage-divider pre-stage to protect the potentiometer from the supply. Resistance tolerance is ±10% as standard for values at or below 100Ω, reflecting the inherent production spread of very low resistance wirewound elements, while values above 100Ω are available in either ±5% or ±10% grades. The climatic category of 25/085/04 defines operation and qualification across +25°C to +85°C with limited humidity endurance, appropriate for indoor industrial and laboratory environments. Units are supplied in bulk plastic bag and carton box packaging.
DG Series Precision Wirewound Potentiometers Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: DG
Resistor type: Variable
Description: Wire wound potentiometer
Power Rating: 2W
Resistance (Ω): 22~3.3k
Tolerance (%): ±5, ±10
Applications of the DG Series Precision Wirewound Potentiometers
Where RARA variable resistors are deployed in the field.
High-voltage power supply and converter circuits — precision output voltage and current adjustment in circuits where the potentiometer is directly referenced to high-voltage rails
Industrial motor drive and thyristor control systems — speed reference and firing angle adjustment in mains-voltage drive circuits
High-voltage laboratory instruments and power references — precision resistance adjustment in equipment operating at or near 750V AC
Low-resistance precision divider and attenuator networks — wirewound accuracy in impedance-matching and signal-level division circuits operating under power
Current sensing and measurement circuits — calibrated low-resistance shunt and balance elements where wirewound stability is required
Industrial heating and temperature control systems — setpoint and power level adjustment in resistance-based heating control circuits
High-voltage test and measurement equipment — precision resistance adjustment in dielectric test sets, high-voltage bridges, and insulation testers
Electrochemical and electrolytic process control — current and voltage reference adjustment in plating, anodising, and electrolysis power supply circuits
Railway traction and auxiliary power equipment — reference and setpoint adjustment in systems where potentiometers must tolerate high bus voltages
General-purpose high-voltage precision applications — wherever a single-turn wirewound potentiometer rated at 2W and 750V AC with low-resistance values from 22Ω to 3.3kΩ is required
Related Products of the DG Series Precision Wirewound Potentiometers
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
Model: PR-16
Resistor type: Variable
Description: 16mm, carbon single turn potentiometer
Power Rating: 0.1W
Resistance (Ω): E3, 100~10k
Tolerance (%): ±5, ±10, ±20, ±30
Model: PR-18
Resistor type: Variable
Description: 18.5mm, carbon single turn potentiometer
Power Rating: 0.2W
Resistance (Ω): E3, 120~2.2M
Tolerance (%): ±5, ±10, ±20, ±30
Model: PR-24
Resistor type: Variable
Description: 24mm, carbon single turn potentiometer
Power Rating: 0.5W
Resistance (Ω): E3, 100~1M
Tolerance (%): ±5, ±10, ±20, ±30
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.
