630-750 uf 220-250 VAC Round Start Capacitor - Durable Motor Start

In this review the reviewer tested the TEMCo round start capacitor to see whether it delivers reliable motor starting for OEM single phase motors and gear motors. The bottom line: this capacitor is aimed at technicians and maintenance teams who need a compact, durable replacement with predictable performance, and its biggest reason to buy is the combination of a wide 220-250 V range and a high capacitance window of 630-750 uf that helps ensure a strong start pulse for motors. The vegetable oil filling and PCB-free construction add peace of mind in industrial settings.

Key Features

• Voltage range: The 220-250 V rating covers common single phase supply voltages so it fits many OEM motor applications without over-specifying.
• Capacitance: The 630-750 uf range provides the high starting torque required by larger single phase motors and gear motors, improving startup reliability.
• Construction: The capacitor is vegetable oil filled and housed in a rugged phenolic resin case, which enhances durability in shop and industrial environments.
• Safety: PCB free design reduces environmental and disposal concerns compared with older capacitor chemistries, making it suitable for routine repair inventories.
• Terminals: 1/4 in quick disconnect terminals simplify installation and replacement in tight motor compartments or on control panels.
• Warranty: The included 5 year warranty reduces long-term risk for maintenance buyers replacing motor start components.

Who It's For

This capacitor is best for maintenance technicians, OEM service departments, and DIYers comfortable working with mains AC who need a reliable, compact start capacitor for single phase motors and gear motor assemblies. Its dimensions and quick-disconnect terminals make it convenient for retrofits and direct replacements where space is limited.

It is less appropriate for applications that require a different capacitance window or voltages outside 220-250 V, or for users who need a run capacitor solution rather than a start capacitor. For specialty motor controllers or low-voltage equipment, choose a part specified for those conditions instead.

Pros & Cons

Pros

• Wide 220-250 V rating makes it compatible with common single phase supplies.
• High 630-750 uf capacitance improves starting torque for motor-heavy loads.
• Vegetable oil filling and PCB-free design reduce environmental concerns and increase safety.
• Compact phenolic resin case and 1/4 in quick disconnect terminals make installation straightforward.

Cons

• Capacitance range is broad (630-750 uf), so precise-match replacements may require checking motor specs.
• Intended as a start capacitor only; not suitable where a run capacitor is required.

Specifications

Voltage	220-250 V AC
Capacitance	630-750 uf
Frequency	50/60 Hz
Fill	Vegetable oil (PCB free)
Dimensions	2.56 in diameter, 4.37 in total height
Terminals	1/4 in Quick Disconnect
Case	Rugged phenolic resin

Our Verdict

The TEMCo 630-750 uf 220-250 VAC round start capacitor is a practical, cost-effective choice for service shops and equipment builders who need reliable motor starting. Its PCB-free vegetable oil fill, robust phenolic housing, and convenient quick-disconnect terminals make it good value for routine repairs and OEM replacements, provided the motor's required capacitance and voltage match the part.

Frequently Asked Questions

Is this capacitor safe for industrial use?
Yes, the vegetable oil fill and PCB-free construction along with the phenolic case are suitable for industrial repair and OEM replacement tasks.

Can this be used as a run capacitor?
No, this unit is specified as a start capacitor and should not be substituted where a run capacitor is required.

How do I connect it?
It uses 1/4 in quick disconnect terminals for straightforward wiring during replacement or retrofit.