Stephill Capacitor 18uf - OEM Number: 037-0013

The Stephill Capacitor 18µF (OEM 037-0013) is a genuine replacement electrical capacitor designed for use in selected Stephill generator alternators and power generation systems. The capacitor plays a vital role in the alternator excitation circuit, helping to regulate voltage output, stabilise generator performance, and ensure reliable production of electrical power under varying load conditions.

Manufactured to OEM specifications, this capacitor is engineered for continuous operation in demanding generator environments, where it is subjected to temperature fluctuations, vibration, and electrical loading. Correct capacitor performance is essential for maintaining stable voltage output and ensuring the generator operates efficiently and reliably.

FUNCTION AND OPERATION

• Supports alternator excitation and voltage generation
• Helps regulate generator voltage output
• Maintains stable electrical performance under load
• Assists with efficient alternator operation
• Supports reliable power generation
• Designed for industrial and construction generator applications

TECHNICAL DETAILS

• OEM Part Number: 037-0013
• Type: Alternator capacitor
• Capacitance: 18µF (Microfarad)
• Function: Voltage regulation and excitation support
• Application: Stephill generator alternator systems
• Construction: Heavy-duty metallised capacitor assembly
• Design: OEM-configured direct replacement component
• Installation: Alternator or control box mounted depending on generator specification

The capacitor forms part of the generator's electrical system and is used to maintain correct alternator excitation characteristics and output stability.

TYPICAL APPLICATIONS

Suitable for a range of Stephill generator equipment, including:

• Portable petrol generators
• Portable diesel generators
• Construction site generators
• Standby power generators
• Industrial power generation equipment
• Alternator excitation systems

Capacitors of this specification are commonly used in brushless alternator systems where voltage stability and reliable power generation are required.

IMPORTANT INFORMATION

Always confirm the correct OEM part number, capacitance value, voltage rating, alternator model, and generator serial number before ordering, as capacitors with similar physical dimensions may have different electrical specifications and are not always interchangeable. OEM 037-0013 is specified as an 18µF capacitor, and fitting an incorrect value may result in poor voltage regulation, unstable output, reduced generator performance, or failure to generate electricity correctly.

Symptoms of a failed capacitor can include low voltage output, fluctuating voltage, difficulty building voltage, or complete loss of generator output. When replacing the capacitor, it is advisable to inspect the alternator windings, AVR (where fitted), wiring connections, terminal block, and mounting brackets for signs of overheating, corrosion, or damage to ensure reliable long-term operation.

DELIVERY OPTIONS (UK mainland only)

Next Day Delivery*
£11.95 or FREE for orders over £150
Orders placed before 4pm Monday to Friday will be delivered on the next business day.
Orders placed after 4pm on Friday will be delivered the following Tuesday.
*Next day delivery applies to stocked items only. Availability can be found on the product pages.

Premium Delivery*
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£25.00 for delivery before 12:30pm
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**Separate carriage charges apply to bulk products such as 205L barrels.