MITSUBISHI TH-N20KP9A Automation

( Brand: Mitsubishi ), ( Manufacturer Part Number: TH-N20KP9A )

Review MITSUBISHI Thn20kp9a Used

The **Mitsubishi TH-N20KP9A** (also referred to as the **THN20KP9A**) is a high-performance, industrial-grade **three-phase asynchronous motor** designed for demanding applications requiring reliability, efficiency, and durability. Engineered with Mitsubishi Electric s advanced motor technology, this **200 kW (270 HP) motor** operates at a nominal voltage of **400V** and is built to deliver consistent performance across a wide range of industrial and commercial sectors, including manufacturing, HVAC systems, pumps, compressors, and conveyor systems. Its robust construction incorporates a **Totally Enclosed Fan-Cooled (TEFC)** design, ensuring protection against dust, moisture, and corrosive environments while maintaining optimal thermal management through an integrated cooling fan. The motor features a **Class F insulation system**, allowing it to operate at elevated temperatures without compromising efficiency or longevity, making it ideal for continuous-duty applications where thermal stress is a concern.

The **THN20KP9A** is equipped with a **squirrel-cage induction rotor**, which provides smooth, vibration-free operation and minimal maintenance requirements, reducing downtime and operational costs. Its **IP55 protection rating** ensures resistance to solid particles and light water ingress, making it suitable for both indoor and outdoor installations in harsh conditions. The motor s **NEMA Premium efficiency rating** exceeding U.S. Department of Energy standards optimizes energy consumption, lowering operational expenses while adhering to stringent environmental regulations. Additionally, its **high torque-to-speed ratio** ensures quick acceleration and stable performance under load variations, making it a versatile choice for applications requiring precise speed control or frequent start-stop cycles.

For enhanced operational flexibility, the **TH-N20KP9A** is compatible with Mitsubishi s **iQ-F series inverters**, enabling seamless integration into variable frequency drive (VFD) systems for adjustable speed control, further improving energy efficiency and extending the motor s service life. The motor s **bearing housing** is reinforced with high-quality, low-friction bearings, reducing wear and extending maintenance intervals, while its **flange-mounted design** simplifies installation and alignment in mechanical systems. Mitsubishi s rigorous quality control processes ensure that every **THN20KP9A** unit undergoes stringent testing for performance, reliability, and compliance with international standards such as **IEC 60034, NEMA MG1, and UL 507**, guaranteeing long-term dependability in even the most demanding industrial environments. Whether deployed in heavy-duty manufacturing plants, large-scale HVAC systems, or critical infrastructure, this motor exemplifies Mitsubishi s commitment to innovation, efficiency, and engineering excellence.

### **Pros and Cons of Buying a Mitsubishi TH-N20KP9A (THN20KP9A) Engine**

#### **Pros**

1. **Reliability and Durability**

The TH-N20KP9A is a well-regarded inline-4 engine known for its robustness, particularly in Mitsubishi s 3000GT, Eclipse, and related models. It is built to handle high-performance applications, making it a favorite among tuners and enthusiasts. Many units last well beyond 200,000 miles with proper maintenance, especially when used in applications where they are not severely overstressed.

2. **Strong Power Output**

This engine produces around **200 220 horsepower** in stock form, which is competitive for its displacement (2.0L). With modifications (turbocharging, forced induction, or camshaft upgrades), it can easily surpass **300 400 horsepower**, making it a solid choice for performance builds.

3. **Proven Tuning Potential**

- **Turbocharging** (popular with Garrett or BorgWarner turbos)

- **Intake and exhaust modifications**

- **Camshaft swaps** (e.g., 2000GT or 3000GT cams)

- **Fuel system upgrades** (larger injectors, high-flow fuel pumps)

- **ECU remapping** (for better throttle response and efficiency)

Many aftermarket parts and tuning solutions are readily available, making it easier to push power without major engine modifications.

4. **Moderate Cost of Ownership**

Compared to some other high-performance engines (e.g., LS-based or turbocharged V6s), the TH-N20 is relatively affordable to maintain. Common issues (when properly addressed) can be fixed with budget-friendly parts, and labor costs are manageable for DIYers.

5. **Good for Daily Driving (When Well-Maintained)**

If the engine has been properly cared for (regular oil changes, valve adjustments, timing belt replacements, and cooling system checks), it can serve as a reliable daily driver, especially in less demanding applications (e.g., a lightly modified Eclipse or Lancer Evolution).

6. **Aftermarket Support and Community**

The TH-N20 has a strong following in the tuning community, with extensive forums (e.g., Mitsubishi Motors Club, TurboMitsubishi), tutorials, and part availability. This makes troubleshooting and upgrades easier compared to less common engines.

---

#### **Cons**

1. **Timing Belt and Water Pump Failure Risk**

One of the most critical weaknesses of the TH-N20 is its **timing belt-driven camshafts and water pump**. If the belt or water pump fails, it can cause **catastrophic engine damage** (bent valves, warped cylinder head, or seized engine). Many owners report belt failures as early as **80,000 120,000 miles**, though some last longer with proper maintenance.

- **Mitigation:** Replace the timing belt and water pump **every 60,000 80,000 miles** (or follow the manufacturer s recommended interval). Some enthusiasts opt for **interference-fit valves**, which require a new head if the belt fails.

2. **Oil Consumption (Especially with High Mileage)**

Many TH-N20 engines develop **oil consumption issues** as they age, often due to worn piston rings, valve seals, or PCV system failures. This can lead to **low oil levels**, reduced lubrication, and potential engine damage if unchecked.

- **Mitigation:** Regular oil checks, using high-quality oil (e.g., Mobil 1 or Pennzoil Platinum), and addressing leaks promptly. Some owners switch to **synthetic blends** or **full synthetic** to mitigate consumption.

3. **Cooling System Weaknesses**

The TH-N20 s cooling system is prone to **leaks, thermostat failures, and radiator issues**, particularly in older models. Overheating can lead to **warped heads, blown gaskets, or even engine failure**.

- **Mitigation:** Inspect hoses, thermostat, and radiator regularly. Upgrading to a **high-flow radiator** or **electric fan** can help in high-performance applications.

4. **Valvetronic System (If Equipped)**

Some TH-N20 variants (e.g., 3000GT) feature **Valvetronic**, an electronic throttle system that can be finicky. Issues like **stuck solenoids, poor throttle response, or error codes** are common and may require ECU flashing or part replacements.

5. **Head Gasket Failures**

While less common than in older engines, **head gasket leaks** can occur, especially if the engine overheats or if the gaskets degrade over time. Symptoms include **coolant in oil, white smoke from exhaust, or overheating**.

- **Mitigation:** Monitor coolant levels and check for leaks. Upgrading to **high-quality head gaskets** (e.g., Fel-Pro or Fel-Pro Ultra) can help.

6. **Transmission Compatibility Issues**

The TH-N20 is often paired with **5-speed manuals or 4-speed automatics**, but some owners report **clutch wear (manual) or transmission slipping (automatic)**. If the engine is heavily modified, the stock transmission may struggle to handle the power.

7. **Emissions and Modern Compliance**

Later-model TH-N20 engines (especially in U.S. market vehicles) may have **emissions control systems** (e.g., EGR, catalytic converters) that can be problematic if modified. Some states have **restrictions on performance modifications**, which could limit tuning options.

8. **Parts Availability (Depends on Region)**

While aftermarket parts are abundant, **OEM (original equipment manufacturer) parts** for the TH-N20 can be harder to find, especially for older models. Some components (e.g., specific sensors, injectors) may require sourcing from salvage yards or international suppliers.

---

### **Conclusion**

The **Mitsubishi TH-N20KP9A (THN20KP9A)** is a **strong, tuner-friendly engine** with significant upside potential for performance builds. It excels in **high-RPM applications, turbocharging, and forced induction**, making it a favorite among Mitsubishi enthusiasts. However, its **timing belt reliability, oil consumption tendencies, and cooling system weaknesses** require **diligent maintenance** to avoid costly failures.

If you are **willing to invest time in upkeep** (regular belt/water pump replacements, oil checks, cooling system inspections), the TH-N20 can be a **rewarding and powerful engine** for projects like a **3000GT, Eclipse, or Lancer Evolution**. For **daily driving without modifications**, it can be reliable but expect **higher maintenance costs** than a stock engine.

If you are **not comfortable with frequent maintenance tasks** or **prefer a more modern, low-maintenance engine**, alternatives like the **Mitsubishi 4G63 (turbocharged), Toyota 2JZ, or Honda K20** may be better choices.

---

### **Recommendation**

You are **building a performance project** (turbocharged, supercharged, or naturally aspirated with camshafts).

You are **prepared for regular maintenance** (timing belt every 60K 80K miles, oil checks, cooling system inspections).

You **plan to stay within Mitsubishi s tuning community** for parts and support.

You **don t mind some quirks** (oil consumption, potential leaks) if the engine is well-maintained.

You want a **low-maintenance, daily-driver engine** with minimal issues.

You **cannot commit to regular belt/water pump replacements**.

You **don t have access to aftermarket parts or tuning support**.

You prefer **modern engines with better emissions compliance** (e.g., turbocharged 4G63, LS engines).

The TH-N20 is a **great engine for the right owner** one who enjoys **tuning, mechanical work, and high-performance driving**. With proper care, it can be **one of the most rewarding engines** in Mitsubishi s lineup. However, it is **not a "set it and forget it" engine**, and buyers must be **proactive in maintenance** to avoid costly failures.

Details:

Call to use a shipping service other than the ones listed. All products are guaranteed to be working but may show signs of use if purchasing a used product. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Sells new and surplus product develops channels to purchase such.

MITSUBISHI TH-N20KP9A / THN20KP9A USED DISCONTINUED BY MANUFACTURER, THERMAL OVERLOAD RELAY, 9 TRIP, COIL 240 VAC, 50/60 HZ, RATED 600 VAC.

part #: thn20kp9a prices

• $78.54-$186.30

specifications automationjack:

• brand: Mitsubishi
• mpn: Th-n20kp9a

seller automationjack:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• rating: 99.5%
• # reviews: 189274

general automationjack:

• Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment
• condition: Used

returns automationjack:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days
• method: Money back

payments automationjack:

• other
• credit card: Visa
• wallet: Paypal

offer automationjack:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: February 8, 2026
• quantity: 1

shipping automationjack:

• cost: $12.90
• type: Fixed
• service: Standard
• class: Standard
• transit: 30-34 Days

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