Run Capacitor, Oval, 70 MFD, 440V

Mars 12830 – 70 MFD, 440V Oval Motor Run Capacitor for Single-Phase Induction Motors

The Mars 12830 is a heavy-duty oval motor run capacitor rated at 70 microfarads (MFD) and 440 volts AC, designed for continuous-duty applications in single-phase induction motors. This component provides consistent phase shift and voltage stabilization in fan motors, blower assemblies, and compressor circuits across residential and light commercial HVAC systems.

Constructed with non-PCB oil-filled dielectric and enclosed in a corrosion-resistant aluminum housing, the 12830 capacitor meets EIA-456-A endurance standards and is UL recognized for field installation in motor-run systems.

Application and Performance Overview

Intended for use in permanent split capacitor (PSC) motors, this run capacitor maintains motor torque and current balance during operation. It is typically installed in air handlers, condenser units, and refrigeration equipment requiring high MFD ratings at 440V line voltage. Its oval case form factor allows compatibility with OEM mounting brackets in compact enclosure layouts.

Key Technical Specifications

• Capacitance: 70 MFD ±6%
• Voltage Rating: 440 VAC, 50/60 Hz
• Case Type: Oval aluminum shell
• Dielectric: Oil-filled, non-PCB
• Operating Temp Range: -40°C to +70°C
• Terminals: Standard dual tab connections (¼-inch quick connects)

Physical Dimensions

• Height: Approximately 4.75 inches
• Width: Approximately 2.0 inches
• Depth: Approximately 1.25 inches

Installation and Field Use

The Mars 12830 should be installed by licensed HVAC or electrical professionals. Verify motor nameplate data for capacitance and voltage compatibility prior to installation. Always discharge the existing capacitor before handling. Secure the unit using a metal strap or approved capacitor clamp and connect terminals according to system wiring diagrams (typically marked “C” and “HERM” or “FAN”).

Contractor-Centric Features

• ✅ High-Capacitance Output: 70 MFD rating supports high-torque PSC motor applications
• ✅ 440V Rating: Withstands voltage fluctuations common in commercial systems
• ✅ Built-In Safety: Internal pressure interrupter disconnects the capacitor during failure events
• ✅ Field-Proven Reliability: Constructed to meet EIA and UL endurance testing requirements
• ✅ Compatible Form Factor: Oval case fits standard capacitor holders in HVAC system panels