An AC motor run capacitor is a continuous-duty capacitor that stays connected in a single-phase motor circuit to create a phase shift, improving torque, efficiency, and power factor. Unlike start capacitors, run capacitors use self-healing metallized polypropylene film and are rated for 24/7 operation.
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Key Takeaway
NR Capacitor manufactures AC Motor Run Capacitors (1–100 µF, 250/330/440 VAC) in Hosur, Tamil Nadu. Built with self-healing metallized polypropylene film, ultra-low dissipation factor (≤0.002 @ 1kHz), ISO 9001:2015 certified, 100% tested. Ideal for pumps, compressors, industrial motors. Request a quote →
- For: OEMs, distributors, procurement teams buying motor run capacitors in bulk
- Capacitance: 1–100 µF | Voltage: 250V, 330V, 440V AC
- Lead time: 7–10 business days standard | 15–20 days custom
- MOQ: 500 units standard | Custom MOQs on request
Product Overview
Continuous-Duty MPP Run Capacitors
Continuous-Duty MPP Run Capacitors
(1 µF to 100 µF, 250V–440V AC)
Our AC Motor Run Capacitors are the gold standard for continuous-duty operation in single-phase AC motors across Indian and international industries. Each capacitor is built with premium metallized polypropylene (MPP) film dielectric, delivering stable capacitance across the full 1–100 µF range, available in 250V, 330V, and 440V AC ratings with a tight tolerance of ±5% or ±10%. Ultra-low dissipation factor (tan δ ≤ 0.002 @ 1kHz) and insulation resistance of >10,000 MΩ × µF ensure exceptional thermal and electrical stability.
Designed for applications that demand long-term reliability — from water pumps and air conditioning compressors to industrial conveyors and automation systems — our motor run capacitors feature self-healing technology that automatically clears dielectric breakdowns, ensuring uninterrupted performance even under electrical stress. Housed in plastic or aluminium cases with P0 safety class and rated for the Class C operating range (-25°C to +85°C), with customized termination options available.
Key Features
Why Choose Our
Why Choose Our
AC Motor Run Capacitor
Self-Healing Technology
Automatic recovery from dielectric breakdown ensures long operational life and reliability under voltage surges.
Low Dissipation Factor
tan δ ≤ 0.002 @ 1kHz minimizes energy losses, improving motor efficiency and reducing operating costs.
Flame-Retardant Case
UL 94 V-0 rated plastic and aluminium housings provide maximum safety in residential, commercial, and industrial environments.
Class C Temperature Range
Operates reliably from −25°C to +85°C (Class C), suitable for extreme environmental conditions.
High Surge Withstand
Tested at 2× rated voltage for 2 seconds. Robust construction handles voltage fluctuations and transient surges without performance degradation.
ISO 9001:2015 Certified
Manufactured in ISO 9001:2015 compliant facility meeting international quality standards.
Tight Tolerance
Available in ±5% and ±10% tolerance options for precision motor matching and consistent performance.
P0 Safety Class
P0 protection class with self-healing dielectric and overpressure disconnector for fail-safe operation.
3,000+ Hour Life
Engineered for 3,000+ hours of continuous-duty operation under rated conditions.
Need bulk pricing or custom dimensions for your project?
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Technical Data
Electrical, Mechanical &
Electrical, Mechanical &
Environmental Specifications
Electrical Specifications
| Capacitance Range | 1 µF – 100 µF |
| Voltage Rating (AC) | 250V, 330V, 440V |
| Tolerance | ±5%, ±10% |
| Dielectric Material | Metallized Polypropylene (MPP) |
| Dissipation Factor (tan δ) | ≤ 0.002 @ 1kHz |
| Insulation Resistance | > 10,000 MΩ × µF |
| Test Voltage (Dielectric) | 2× rated voltage (2 sec) |
Mechanical & Environmental
| Operating Temperature | −25°C to +85°C (Class C) |
| Case Material | Plastic / Aluminium |
| Life Expectancy | 3,000+ hours |
| Safety Class | P0 Class |
| Certification | ISO 9001:2015 |
| Frequency | 50 / 60 Hz |
| Termination | Wire leads / Fast-on tabs / Custom |
Unsure about technical specs? Speak directly with our capacitor engineers.
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Applications
AC Motor Run
AC Motor Run
Capacitor Applications
AC Motor Run Capacitors are essential components in a wide range of single-phase AC motor applications across industries.
Water and irrigation pumps
Air conditioning compressors
Refrigeration systems
Industrial conveyor motors
Power tools and machinery
Fan and blower motors
Automation and control equipment
Garage door openers and gate motors
From Our Factory Floor
In internal load-cycle testing at 40°C ambient at our Hosur facility, our AC motor run capacitors maintained ±2% capacitance drift over 10,000 hours of continuous operation — exceeding the IEC 60252-1 standard durability benchmark. Every production batch is verified for capacitance value, dissipation factor (DF ≤ 0.002 @ 1kHz), insulation resistance (IR > 10,000 MΩ·µF), and 2× rated voltage withstand for 60 seconds. Only units clearing all four parameters are dispatched.
Testing conducted at NR Capacitor manufacturing facility, Bagalur, Hosur, Tamil Nadu — data on file.
FAQs
Frequently Asked
Frequently Asked
Questions
Quick answers to the most common questions from our OEM and procurement customers.
1 µF to 100 µF capacitance, with 250V, 330V, and 440V AC ratings. All support 50/60 Hz operation across a Class C temperature range of –25°C to +85°C.
A run capacitor stays in the circuit continuously to improve efficiency and power factor (self-healing MPP film, low dissipation factor). A start capacitor provides a high-torque burst only during startup (max 3 seconds) and is then switched out. Run capacitors = continuous duty; start capacitors = intermittent (P0 class) duty.
Yes. All NR Capacitor AC motor run capacitors use self-healing metallized polypropylene film dielectric. If a dielectric breakdown occurs, the metallized layer around the fault vaporizes, restoring insulation so the capacitor continues functioning.
Yes. We are a preferred supplier to OEMs manufacturing pumps, AC compressors, refrigeration systems, and industrial machinery. We offer custom capacitance values, voltage ratings, termination types, and housing configurations for bulk orders. MOQs apply.
Standard orders dispatch within 7–10 business days. Custom specifications may require 15–20 business days depending on complexity and volume.
Manufactured in an ISO 9001:2015 certified facility. Every unit undergoes 100% end-of-line testing for capacitance, dissipation factor, voltage withstand, and insulation resistance. Compliant with IEC 60252 and UL 810 standards.
Standard AC motor run and fan capacitors: 500 units minimum. Custom orders may have different MOQs — contact us for specifics.
Yes, we provide samples for qualified OEMs and distributors. Sample requests are processed within 3–5 business days. Shipping charges may apply.
Selection Guide
How to Select the Right
How to Select the Right
AC Motor Run Capacitor
Follow these 7 steps to specify the correct capacitor for your motor application.
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Identify your motor type and application
Confirm you have a single-phase AC motor. Determine if the capacitor is for continuous run duty (pumps, compressors, fans running 24/7) or intermittent start duty.
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Determine required capacitance (µF)
Check the motor nameplate or existing capacitor for the rated µF value. For run capacitors, typical range is 1–100 µF. Undersizing reduces torque; oversizing increases current draw and heat.
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Select voltage rating — must meet or exceed circuit voltage
Choose 250V, 330V, or 440V AC. The capacitor voltage rating must be ≥ your motor's operating voltage. Higher voltage rating = better surge protection and longer life.
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Choose dielectric: metallized polypropylene for run capacitors
Run capacitors require self-healing MPP film for continuous duty. MPP offers low dissipation factor (≤0.002 @ 1kHz), high insulation resistance (>10,000 MΩ×µF), and automatic fault recovery.
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Verify operating temperature range matches your environment
NR Capacitor run capacitors are rated Class C: –25°C to +85°C. For extreme environments (foundries, outdoor HVAC in North India), confirm ambient temps stay within this range.
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Check certification requirements for your target market
India domestic: ISO 9001, IEC 60252. Export to UAE/Saudi: UL 810, CE. Export to EU: RoHS, REACH compliance. Our capacitors meet all major standards.
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Contact NR Capacitor for a quote and engineering confirmation
Share your motor nameplate data, required µF, voltage, quantity, and any custom termination needs. Our engineering team confirms the optimal part number and provides a formal quotation within 24 hours.
Need Help Selecting the Right AC Motor Run Capacitor?
Our application engineers in Hosur can help you with capacitor sizing, voltage selection, custom termination, and bulk OEM pricing. Get a technical response within 24 hours — no obligation.
Get in Touch
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Product
Interested in our AC Motor Run Capacitors? Reach out for pricing, samples, or technical specifications.
Our Address
Ground Floor 5/150, NR Farms, Venkatapuram Road, Bagalur Post, Hosur Taluk, Tamil Nadu - 635103
Phone
+91 98765 43210
Email
sales@nrcapacitor.com
Business Hours
Mon – Sat: 9:00 AM – 6:00 PM
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