30.0µF 440V AC Motor Run Capacitor
Part Number: MR440V30
30.0µF • 440V AC • 70°C • Motor Capacitor
Capacitance
30.0µF
Voltage
440V AC
Tolerance
±±6%
Temp Rating
70°C
Mounting
screw
Dielectric
polypropylene
$72.45 each × 1
About the 30.0µF 440V AC Motor Run Capacitor
Motor Run capacitor for HVAC, compressors, and motors. 30.0µF, 440V AC.
Applications for 30.0µF 440V AC Motor Capacitors
Typical design scenarios where the MR440V30 (30.0µF / 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
Power Capacitor Banks
High-current bus bars in industrial inverters, regenerative drives, and capacitor bank assemblies
HVAC & Motor Systems
Single-phase motor start/run, compressor circuits, and fan motors in commercial HVAC equipment
Need a Replacement for MR440V30?
30.0µF · 440V AC · screw
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 MR440V30
Why Choose This Motor Capacitor?
- ±±6% tolerance provides reliable performance within standard design margins
- 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
- 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 MR440V30 with alternative part numbers.
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Frequently Asked Questions
Common questions about MR440V30 and motor capacitors
What applications use a 30.0µF 440V AC motor capacitor?
This 30.0µF 440V AC motor capacitor serves filtering, timing, and energy storage functions in circuits operating within its voltage and temperature ratings.
Can the MR440V30 handle high-temperature environments?
The MR440V30 is rated for 70°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 90°C-rated alternative for additional thermal margin.
What torque specification should I use for the MR440V30 screw terminals?
Use the torque value specified in the manufacturer datasheet — typically 1.5–2.5 N·m for M5 terminals and 0.8–1.2 N·m for M4 terminals. Over-torquing can crack the terminal seal and allow electrolyte leakage. Use star washers for vibration resistance and re-torque connections after 24 hours of initial thermal cycling in the target application.
What capacitors can replace the MR440V30?
Cross-referencing the MR440V30 requires matching capacitance (30.0µF), voltage (440V AC), temperature rating (70°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 MR440V30?
Yes. Industry best practice is to operate capacitors at 60–80% of their rated voltage. For the MR440V30 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 MR440V30?
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 MR440V30 shows as out of stock, our sourcing team can typically locate high-voltage motor capacitors within 1–2 weeks through our manufacturer and distributor network. Contact us for expedited options or large-quantity pricing.
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