Danfoss 123B9318 Capacitor

The Danfoss 123B9318 Start Capacitor is a mission-critical component engineered for light commercial refrigeration and HVAC compressors. Designed to provide the high-torque electrical surge required during initial startup, this 170 MFD 160V capacitor helps motors overcome head pressure in systems utilizing non-bleed TXVs or operating under high-load cycles. This start capacitor replacement is house in a robust black plastic casing, effectively dissipating heat during the short-duty cycle of the motor’s starting phase.

As a veteran tech knows, a degraded capacitor leads to increased amperage draw, humming motors, and eventual winding failure. The Danfoss 123B9318 ensures refrigeration compressor startup is seamless, reducing mechanical stress on the crank and pistons. This unit comes complete with an integrated cover and cable, simplifying field installations and ensuring secure terminal connections. For contractors maintaining Danfoss reciprocating units, keeping a 170 microfarad 160V start cap on the truck is essential for preventing emergency downtime and ensuring HVAC motor efficiency across various cooling applications.

• High-Torque Performance: Provides a 170 MFD burst to ensure reliable compressor ignition even under low-voltage conditions.
• OEM Compatibility: Specifically designed for Danfoss light commercial reciprocating compressors, ensuring exact electrical matching.
• Complete Assembly: Includes a protective cover and pre-wired cable to reduce installation time and protect against debris.
• Durable Construction: Engineered to withstand the frequent cycling common in commercial refrigeration environments.
• System Protection: Minimizes the duration of high-inrush current, protecting the start windings from thermal overload.

What are the signs that a Danfoss 123B9318 needs replacement?
Common indicators include the compressor humming but failing to turn over, a bulging or leaking capacitor casing, or the system tripping the circuit breaker immediately upon startup.

Can I use a higher voltage capacitor as a substitute?
While you can generally use a higher voltage rating (e.g., 250V) if the MFD matches, you should never use a lower voltage than the 160V specified for this Danfoss unit to avoid dielectric breakdown.

Does this capacitor require a bleed resistor?
Most start capacitors used with potential relays should have a bleed resistor installed to dissipate stored energy; always verify your specific wiring diagram before final power-up.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.