What is a Composition Resistor?
Composition resistors are produced using a mixture of a finely ground insulator and conductor. This mixture is then compressed into a cylindrical shape. Terminals are attached and the insulation coating is applied to the outside. The resistance is controlled based on the ratio of the insulator and conductor mixture.
Composition Construction
We offer a few different series in Composition construction. Composition resistors are chosen based on energy handling & resistance value and typically have a high tolerance.
Composition resistors perform best in High Energy/Surge applications. The large amount of mass contained in the resistor enables high levels of energy absorption. The high levels can be repeated without negative effects to the resistance value. Composition resistors are proven to be a robust choice in handling surge loads.
OU/OUM Series
Ceramic Composition The OU/OUM are ceramic composition resistors ideal for high energy, high voltage, and high surge applications. They have a high energy pulse capability (10 Joules for 10ms)… Read More
A Series
PulsEater® Ceramic Composition The “A” Series non-inductive, ceramic composite resistors are designed for a variety of applications where high energy handling capabilities are crucial.… Read More
EY Series
Ceramic Composition EY series ceramic composition construction is ideal for high energy/high peak power applications. The EY series is capable of absorbing 400 joules of energy in a single impulse.… Read More
OD/OF/OA Series
Little Demon® Carbon Composition Molded Ohmite’s Little Demons are small, reliable carbon composition resistors with exceptional strength. They are made tough by a molding process that combines… Read More
OW/OX/OY Series
Ceramic Composition The OW/OX/OY Series of fixed ceramic resistors are ideal for circuitry associated with surges, high peak power or high energy. They offer enhanced performance in high voltage… Read More
OC Series
Ceramic Composition The OC series of resistors can often replace carbon and ceramic composition resistors which can be difficult to source or carry prolonged lead times. The OC series can handle… Read More
RC, RF, RW, RP, RM Series
The molded surface mount series is extremely versatile. 5 different construction types include: Composition, Metal film, Wirewound, Power Film and Thick film. Each construction is used to optimize… Read More
Tubular Ceramic Resistors
Non-inductive, high voltage, high power tubular resistors are available in a wide range of standard sizes, ceramic materials terminations and mounting hardware. The Ohmite Ceramic Resistor… Read More
Axial Ceramic Resistors
Non-inductive, high voltage, high-energy, high power axial-leaded resistors providing excellent performance where high peak power or high-energy pulses must be handled in a small size As alternatives… Read More
Slab Ceramic Resistors
Ohmite's 500 Series Non-Inductive Bulk Ceramic Slab Resistors provide high power and energy dissipation in a compact size. Non-inductive, high power slab resistors are available in a few different… Read More
Disk and Washer Resistors
High-energy resistors in solid disk and washer styles from 1.60 to 5.90 inches (40.6 to 150 mm) in diameter. Download Product PDF PRODUCT CHARACTERISTICS Maximum temperature 230°C… Read More
Water-Cooled Resistors
Ohmite's direct and indirect water-cooled non-inductive resistors are capable of dissipating more power in a smaller package than water-cooled resistors previously available in the market. Type Power,… Read More
Metallic Load Bank Resistors
Metallic load bank resistors are typically used for high power load testing of emergency power systems including generators, uninterruptible power supplies, turbines, battery systems and dynamic… Read More
Custom Resistor Assemblies
Custom assemblies provide the flexibility of high energy dissipation, while saving space, time and money. Our products can be arranged in several layouts to expand your system functionality. We… Read More
Encapsulated Resistors
Ohmite offers the design and material expertise to meet your specific resistor package requirements. Key features and benefits of Ohmite encapsulated resistors include: Ohmite non-inductive… Read More