T-Motor MN805-S IP45 Brushless UAV Motor (KV150) - Heavy Payload & VTOL Ready

High-thrust, IP45-rated brushless motor optimized for multirotor, fixed-wing and hybrid VTOL drones. Available KV120 / KV150 / KV170.

Key benefits: High power density - Environmental protection - Robust cooling - Recommended ESC & propeller compatibility

T-Motor MN805-S IP45 Multirotor / Fixed Wing UAV Motor (KV150)

Introduction

In medium-to-large UAV platforms, the propulsion system determines overall performance, endurance, and payload capability. The T-Motor MN805-S IP45 is a professional-grade brushless motor designed to deliver high thrust and long-term reliability for demanding missions - suitable for multirotor, fixed-wing, and VTOL hybrid drones.

Why the MN805-S Matters

Designed for heavy payloads, mapping, inspection, and industrial applications.
IP45 environmental protection for dust and water spray resistance.
Efficient centrifugal cooling and robust materials for long service life.

Key Features & Highlights

High Thrust Capability: Strong static thrust for payload-heavy drones and VTOL transitions.
Built for Durability: Anti-corrosion stator, high-temperature wires and magnets, imported bearings.
IP45 Protection: Dust and spray-resistant (avoid immersion).
Centrifugal Cooling: Active internal cooling improves thermal dissipation.
Balanced & Low Vibration: Tight dynamic balance tolerances for smooth flight.
ESC & Prop Recommendations: FLAME 80A/100A series ESCs and G28x9.2" prop (KV150 typical).

Detailed Specifications (KV150)

Parameter	Value	Notes
KV Rating	KV150	Also available: KV120, KV170
Dimensions	Diameter: 89 x 44.4 mm	Compact envelope
Shaft	Inner 12 mm / Outer 8 mm	Standard mounting sizes
Weight (motor + cable)	About 625 g	Good power-to-weight ratio
Peak Power (180s)	3600 W	Design headroom for short bursts
Idle Current @ 15V	About 2.2 A	Indicative of motor losses
Internal Resistance	About 32 mOhm	Lower - better efficiency
Recommended Propeller	G28x9.2"	Match prop to mission & ESC
ESC Recommendation	FLAME 80A 12S V2.0 / FLAME 100A 14S	Choose ESC with sufficient headroom
Protection Rating	IP45	Protected from dust & water spray (not immersion)
MTBF	About 1,000 hours	Indicative reliability for professional use

Thrust & Efficiency Notes

Performance curves indicate the MN805-S is most efficient in mid-throttle (roughly 40-60% throttle), which is ideal for cruise or sustained hover. At maximum throttle the motor provides very high thrust but with lower efficiency and increased thermal stress. Proper cooling, ESC selection, and prop matching are critical to sustain performance and longevity.

Comparison & Market Position

The MN805-S excels where environmental resistance, long-life reliability, and high-thrust headroom are required. Compared with many hobby-grade motors, it offers better sealing, higher MTBF claims, and active cooling - making it a strong choice for industrial UAVs, inspection drones, tethered systems, and VTOL hybrids. Tradeoffs include higher upfront cost and slightly greater weight compared to minimal hobby alternatives.

Recommended Applications

VTOL / hybrid UAVs (vertical lift and cruise)
Heavy-payload multirotors and cargo drones
Mapping, surveying, and inspection drones
Tethered UAV systems (with proper thermal management)
Deployments in dusty or spray-prone environments

Integration & Best Practices

Cooling: Ensure airflow for the motor and ESC - consider ducts or venting.
ESC Sizing: Use ESCs rated above the motor's expected peak current (FLAME 80A/100A recommended).
Prop Matching: Select props that keep the motor in its efficient RPM band; the manufacturer's recommended prop is a good starting point.
Balance: Maintain rotor and airframe balance; vibration isolation and quality fasteners help longevity.
Wiring: Use sufficient gauge wiring (short runs), secure connectors, and waterproofing where needed.
Redundancy: Design thrust headroom and redundancy as required by mission criticality.
Maintenance: Inspect bearings, seals, and wiring at regular intervals (every 100-200 hours recommended in field use).

Example Integration Scenario (Summary)

In a VTOL hybrid platform, MN805-S motors can be configured for vertical lift and cruise. Their high thrust capacity allows conservative operation in cruise (derating) to improve efficiency and longevity. Designers should size batteries and props so cruise power stays in the mid-throttle efficient band to maximize flight time.

Frequently Asked Questions (FAQ)

Which KV variant should I pick?

Choose based on prop size and desired RPM: lower KV (KV120) for larger props and lower RPM (higher torque/efficiency), KV150 as a balanced option, KV170 for smaller props or higher-speed needs.

Can I use 14S battery with KV150?

KV150 is typically recommended up to 12S for normal operation. While some ESCs support higher voltages, running beyond the motor or ESC recommended voltages can reduce reliability - stay within the spec for long-term use.

What does IP45 mean in practical terms?

IP45 protects against harmful dust deposits and water spray from any direction, but the motor is not rated for submersion. Avoid prolonged exposure to heavy jets or immersion.

How often should I perform maintenance?

Inspect bearings, rotor balance, seals, and wiring periodically (roughly every 100-200 flight hours under normal conditions). Replace components before reaching critical wear or the MTBF threshold in mission-critical systems.

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Order & Shipping Notes

Typical shipping time from supplier: about 7-15 business days. Includes hardware pack and optional global shipping via DHL / FedEx / EMS. Confirm warranty and support terms at checkout.