Carbon & Ceramic Composition Resistors
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
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) for their small size.
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A Series
The “A” Series non-inductive, ceramic composite resistors are designed for a variety of applications where high energy handling capabilities are crucial.
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EY Series
EY series ceramic composition construction is ideal for high energy/high peak power applications.
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OD/OF/OA Series
Ohmite’s Little Demons are small, reliable carbon composition resistors with exceptional strength and perform with low noise, dissipate heat rapidly and offer high-temperature stability.
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OW/OX/OY Series
The OW/OX/OY Series of fixed ceramic resistors are ideal for circuitry associated with surges, high peak power or high energy.
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OC Series
The OC series of resistors can often replace carbon and ceramic composition resistors which can be difficult to source or carry prolonged lead times.
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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.
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Tubular Ceramic Resistors
Ohmite's non-inductive, high voltage, high power tubular resistors are available in a wide range of standard sizes, ceramic materials terminations and mounting hardware.
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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.
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Slab Ceramic Resistors
Ohmite's 500 Series Non-Inductive Bulk Ceramic Slab Resistors provide high power and energy dissipation in a compact size and are available in different materials to meet your needs.
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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.
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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.
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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 braking power dissipation for generators and large motors.
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Custom Resistor Assemblies
Custom power resistor assemblies provide the flexibility of high energy dissipation while saving space, time and money.
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Encapsulated Resistors
Ohmite offers the design and material expertise to meet your specific resistor package requirements.
Read MoreWhy Should You Partner with Ohmite?
Stability: Leader in Resistive Technology for 100 Years
Ohmite has manufactured resistors for 100 years! We've demonstrated a proven track record of creating quality resistive products for high power, high energy, and high voltage applications.
Flexibility: We are Experienced Problem Solvers
Whether it's our expansive catalog of standard parts, our many customization options for each series, or our ability to develop brand new products based on customer designs, Ohmite is dedicated to solving engineers' problems.
Accessibility: We're Here to Help as Trustworthy Partner
Ohmite's team of engineers are available to explain our technology, answer your questions, and consult on important design decisions to help make our customers' lives easier.