Shop Cornell Dubilier (CDM, CDE) Type 291 High-Voltage Mica Capacitors

Type 291 is a high-power mica transmitting capacitor engineered for demanding RF environments. We built this component for systems that face sustained voltage stress, thermal load, and continuous operation. Its construction favors stability over shortcuts, making it suitable for transmitters, energy systems, and mission-focused electronics.

Engineers choose Type 291 when circuit behavior must remain predictable under pressure. This series reflects decades of experience supplying components that perform consistently in real operating conditions.

About Type 291 Mica Capacitors

Type 291 belongs to a class of mica transmitting capacitors designed for high voltage and RF power handling. The internal mica dielectric delivers stable electrical characteristics across long service periods. This design limits drift and reduces unexpected performance changes during extended operation.

We supply Type 291 as a direct replacement for legacy CDM parts. That compatibility reduces redesign work and shortens repair cycles. Engineers can integrate these capacitors into existing platforms without modifying layouts or retesting surrounding circuitry.

This capacitor series performs well in broadcast transmission, military electronics, and industrial RF systems. Applications often involve continuous duty cycles and elevated temperatures. Type 291 handles these demands through controlled capacitance tolerance and strong insulation resistance.

We stock multiple configurations to meet varying electrical requirements. That flexibility supports single replacement needs and larger production runs. Our focus remains on matching the right component to the actual operating environment, not theoretical lab conditions.

Benefits of Type 291 Mica Capacitors

Type 291 delivers reliable capacitance under high voltage exposure. Mica dielectric construction resists breakdown and aging effects common in alternative materials. This stability protects sensitive RF stages from unwanted variation.

Thermal performance remains a defining advantage. Type 291 tolerates heat generated by sustained power transmission. This trait reduces stress on surrounding components and limits maintenance interruptions.

High current handling supports demanding RF loads. Low internal losses reduce heat buildup during continuous operation. That behavior improves overall system efficiency and longevity.

Mechanical integrity also matters. Type 291 withstands vibration and mechanical stress often present in transmitter cabinets and industrial installations. Secure construction limits micro-movement that could affect electrical performance.

Service life represents another advantage. Mica materials age slowly when compared to many film or electrolytic options. This longevity lowers replacement frequency and total ownership cost over time.

Compatibility with established CDM specifications simplifies sourcing. Engineers avoid qualification delays and maintain confidence in system behavior. This benefit proves valuable during urgent repairs or upgrades.

Why Choose Commercial Radio Company, Inc.?

We focus on specialized components that power transmitting and RF systems worldwide. Our experience shapes every recommendation we make. Customers rely on us for accuracy, speed, and practical knowledge gained over decades.

• Largest Stocking Inventory: We maintain the largest domestic inventory of mica transmitting capacitors. This depth allows immediate fulfillment of urgent requirements. Engineers avoid long lead times that delay repairs or commissioning schedules.
• Direct CDM Replacement Expertise: Our team understands CDM specifications at a granular level. We help customers select direct replacements that match electrical behavior and physical fit. That guidance reduces risk during component substitution.
• Same-Day Shipping Capability: We ship the same day on most stocked items. This speed matters when downtime impacts revenue or mission readiness. Fast delivery keeps systems operational without extended outages.
• Focused Product Scope: We concentrate on mica capacitors, isolantite insulators, and RF contactors. This narrow focus builds deeper technical understanding. Customers receive informed answers instead of generic catalog responses.
• Legacy Knowledge With Modern Reach: Our history in transmitting technology informs current operations. We combine long-term experience with global distribution capability. Customers benefit from proven knowledge paired with modern logistics.

Contact us today for more information on Type 291.