EH30300-1285 – Seginus Aerospace PMA Starter Generator Brush
Available now on the Airparts.aero Marketplace.
Overview
The Seginus Aerospace EH30300-1285 is an FAA-PMA approved, high-performance carbon brush, meticulously engineered as a direct replacement for OEM brushes used in Goodrich and Lucas Aerospace starter generators. This brush is a flight-critical component that serves as the sliding electrical contact for conducting the high amperage required for turbine engine starting and for transmitting generated power back to the aircraft's electrical systems. Fabricated from a premium, long-life electro-graphitic composite, the EH30300-1285 is designed to provide exceptional performance and low wear rates in the extreme operational environment of business and regional jet starter generators.
Key Features
- Advanced Electro-Graphitic Material: Manufactured from a proprietary carbon-graphite composite, specifically formulated for high thermal and electrical conductivity, excellent commutating properties, and superior durability to withstand high current loads.
- High-Altitude Performance: The specific material grade is engineered to create and maintain a stable lubricating film (patina) on the commutator surface, ensuring low friction and minimal wear even in the low-humidity conditions of high-altitude flight.
- Dual-Tamped Shunt Design: Features a robust dual-shunt (dual wire lead) connection, securely tamped into the brush body. This redundant design provides a highly reliable, low-resistance path for extreme current flow and ensures mechanical integrity under high stress.
- Reduced Commutator Wear: The brush's inherent lubricity and carefully controlled abrasiveness are designed to polish the commutator surface without causing excessive wear or grooving, leading to longer service life for the more expensive starter generator assembly.
- FAA-PMA Certified: As a certified FAA-PMA part, it has undergone rigorous testing to prove that it meets or exceeds the performance, safety, and quality standards of the original equipment manufacturer's part, making it a fully airworthy and cost-effective replacement.
Technical Specifications
- Part Number: EH30300-1285
- Manufacturer: Seginus Aerospace
- Component Type: Starter Generator Carbon Brush
- Material: Long-Life Electro-Graphitic Composite
- Shunt Type: Dual Tamped Copper Braid
- Primary Application: High-Amperage DC Starter Generators
- Replaces OEM P/N: 30300-1285
- Certification: FAA-PMA
Aircraft Compatibility
The Seginus EH30300-1285 brush is specified for use in specific, high-power starter generator models that are factory-installed on a wide range of corporate, regional, and transport category aircraft.
- Compatible Starter Generator Models (Examples):
- Goodrich / Lucas Aerospace P/N: 23080-049, 23080-057, 23080-061
- Common Aircraft Platforms:
- Bombardier: Challenger 600, 601, CRJ100, CRJ200
- Dassault Falcon: 20, 50, 200, 900
- Hawker: 700, 800, 800XP, 1000
- Gulfstream: GIII, GIV
- Embraer: EMB 120 Brasilia
Applications
The EH30300-1285 has two primary, flight-critical functions in turbine-powered aircraft:
- Engine Start Cycle: Conducts immense DC current (often >1000 amps) from the aircraft's power source to the starter generator's armature, turning the unit into a powerful series-wound motor to initiate turbine rotation.
- Power Generation Mode: After engine start, the unit transitions to a generator. The brushes then collect the generated DC power from the commutator and deliver it to the aircraft's main electrical busses to power all onboard systems.
- Scheduled Maintenance: A consumable part that is inspected and replaced at specified intervals or when worn to its minimum length limit to ensure the continued reliability of the aircraft's starting and electrical generation systems.
Why Choose EH30300-1285?
The starter generator is one of the most critical and hardest-working components on a jet aircraft. The brushes are the heart of this system, and their failure can lead to an inability to start an engine or a total loss of generated power in flight. The Seginus Aerospace EH30300-1285 is a proven, FAA-PMA approved alternative to the OEM, offering equivalent or superior performance and reliability, often at a significant cost savings. The advanced carbon composite provides a long service life and protects the expensive commutator from premature wear, making it the smart choice for discerning flight departments and MRO facilities.
Order Your EH30300-1285 Brushes Now
Ensure the reliability of your aircraft's starting and electrical generation systems with high-performance, FAA-PMA certified components. Visit Airparts.aero to order your Seginus Aerospace EH30300-1285 starter generator brushes today.
The Seginus Aerospace EH30300-1285 brush operates in a high-demand electromechanical interface. Its electro-graphitic composition is specifically designed to handle the dual challenges of high current density and mechanical friction. During the start cycle, the brush must conduct massive current with minimal voltage drop to maximize starting torque. In generator mode, it must provide stable electrical contact with low electrical noise for clean power output. The brush material is engineered to deposit a microscopic graphite film onto the commutator bars, which acts as a solid lubricant. The integrity of this film is critical for preventing a high-friction, high-wear condition known as "threading" or "grooving" of the commutator, thereby extending the service life of the entire starter generator unit.
Note: This is a flight-critical component. Installation must be performed by a certified A&P mechanic or a Part 145 repair station in strict accordance with the starter generator's Component Maintenance Manual (CMM). Brushes must always be replaced as a complete set. Proper seating of new brushes to the commutator is a critical step to ensure optimal performance and service life.
