55µF 440V AC Motor Capacitor
Part Number: MR440V55
55µF • 440V AC • 85°C • Motor Run Capacitor
Capacitance
55µF
Voltage
440V AC
Tolerance
±±20%
Temp Rating
85°C
Mounting
can
Dielectric
film
$104.75 each × 1
About the 55µF 440V AC Motor Capacitor
Motor Run Capacitors capacitor. Capacitance: 55µF, Voltage: 440V AC. Part Number: MR440V55.
Applications for 55µF 440V AC Motor Run Capacitors
Typical design scenarios where the MR440V55 (55µF / 440V AC) is specified:
Power Conversion
Snubber circuits, voltage multipliers, and power factor correction stages at 440V AC operating voltage
Industrial Controls
Relay suppression, arc quenching, and EMI filtering in industrial switchgear and control panels
PCB-Mount Circuits
Through-hole and mixed-technology assemblies in prototype, low-volume, and field-repairable designs
HVAC & Motor Systems
Single-phase motor start/run, compressor circuits, and fan motors in commercial HVAC equipment
Need a Replacement for MR440V55?
55µF · 440V AC · can
Our engineers can cross-reference this part to find a compatible replacement that meets or exceeds the original specifications — with full CoC and traceability documentation.
Technical Specifications
Complete specifications for MR440V55
Why Choose This Motor Run Capacitor?
- 440V AC voltage rating with recommended 20% derating for maximum service life in power circuits
- Part of the MR series — cross-reference available for equivalent parts from other manufacturers
- 100% electrically tested before shipment for guaranteed in-spec performance
- Ships same-day from US warehouse when ordered before 3 PM EST
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Our capacitor specialists can help with selection, cross-reference, and application questions.
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Looking for an Equivalent?
We can help cross-reference MR440V55 with alternative part numbers.
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Frequently Asked Questions
Common questions about MR440V55 and motor run capacitors
What applications use a 55µF 440V AC motor run capacitor?
This 55µF 440V AC motor run capacitor serves filtering, timing, and energy storage functions in circuits operating within its voltage and temperature ratings.
Can the MR440V55 handle high-temperature environments?
The MR440V55 is rated for 85°C, which covers standard commercial and light-industrial environments. For installations in enclosed cabinets or hot climates where ambient temperatures exceed 65°C, consider selecting a 105°C-rated alternative for additional thermal margin.
What is the recommended PCB footprint for the MR440V55?
The MR440V55 uses can mounting. Refer to the manufacturer datasheet for the recommended land pattern. For through-hole parts, ensure the drill diameter is 0.2–0.3mm larger than the lead diameter for reliable hand or wave soldering.
What capacitors can replace the MR440V55?
Cross-referencing the MR440V55 requires matching capacitance (55µF), voltage (440V AC), temperature rating (85°C), and physical dimensions. ESR and ripple current ratings must also meet or exceed the original spec for reliable operation. Contact our technical team at 800-731-1433 for verified cross-reference options — we maintain compatibility data across major manufacturers.
Should I derate the voltage when using the MR440V55?
Yes. Industry best practice is to operate capacitors at 60–80% of their rated voltage. For the MR440V55 rated at 440V AC, this means designing your circuit to keep the applied voltage below 352V under all conditions including transients. Voltage derating significantly extends capacitor life — each 10% reduction in applied voltage can roughly double the expected service life for electrolytic types.
What is the lead time for the MR440V55?
In-stock items ship same-day when ordered before 3 PM EST, with standard delivery of 2–5 business days within the continental US. If the MR440V55 shows as out of stock, our sourcing team can typically locate high-voltage motor run capacitors within 1–2 weeks through our manufacturer and distributor network. Contact us for expedited options or large-quantity pricing.
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