Nidec/US Motors 4.0 HP [16.4A] [56Y/TB] Spa Motor (TT506)

Type:	Pump Motors
Mfg	Nidec/US Motors
Mfg Part #	TT506
Replaces:	5238-138, 623460, EMR-60-6165
Works With:	Spa Motor
Phase:	Not Listed
Horsepower:	4.0 HP (4.0 THP)
Frame:	56Y Frame - Thru-Bolt
Speed:	2-Speed
Voltage:	230V
Amperage:	16.4A/4.8A
Mount:	Threaded

COMPARE AT $712.99

OUR PRICE $547.99

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TAGS: pumpmotors, usmotors

Details

Nidec and US Motors spa motors are trusted for demanding replacement applications where higher output and correct physical fit are both essential, and this 4.0 HP model uses the TT506 reference with a 16.4 amp draw and 56Y threaded-bolt configuration. The Nidec US Motors line is especially useful when larger spa systems need a proven replacement motor platform instead of an uncertain alternative.

This motor has practical value because the 56Y/TB frame style is critical to installation compatibility, especially in higher-output spa pump systems where incorrect motor selection can be costly. Matching horsepower, amperage, and frame configuration helps protect the existing wet end and supports a more reliable repair outcome.

This type of motor is especially useful when a high-output spa motor has failed but the surrounding pump assembly remains structurally sound and worth retaining. That makes targeted motor replacement the more efficient and more strategic service choice.

Installed in the proper application, this Nidec US Motors spa motor helps support strong performance, accurate fitment, and better long-term service confidence.

4.0 HP spa motor in the proven Nidec US Motors replacement line
Rated at 16.4 amps with a 56Y threaded-bolt configuration
Helps restore high-output motor performance in compatible spa systems
Useful when replacing a failed original motor while retaining the pump body
Improves fit confidence and replacement accuracy

Nidec / U.S. Motors – Pool Pump Motors, Electric Motors and Replacement Motor Parts

Who is Nidec / U.S. Motors?

Nidec / U.S. Motors is a leading manufacturer of electric motors and drive systems, part of the global Nidec Corporation. With over a century of engineering expertise, U.S. Motors has become a trusted name in high-performance motor solutions used across HVAC, industrial, and pool and spa applications. Their motors are widely recognized for reliability, efficiency, and long service life.

What products does Nidec / U.S. Motors specialize in?

Nidec / U.S. Motors specializes in electric motors including pool pump motors, variable speed motors, single-speed motors, and replacement motor components. Their product lineup includes motors designed to power pumps, filtration systems, and water features, ensuring proper water circulation and system performance.

Why choose Nidec / U.S. Motors parts for your pool or spa?

Nidec / U.S. Motors products are known for durability, energy efficiency, and consistent performance. Their motors are engineered to operate in demanding environments, handling continuous use, high humidity, and temperature fluctuations. Pool professionals and homeowners choose Nidec for dependable motor replacements that improve efficiency and extend equipment life.

How do you identify and choose the correct Nidec / U.S. Motors part?

To select the correct motor, it’s important to match specifications such as horsepower (HP), service factor (SF), voltage, frame size, RPM, and shaft type. Verifying model numbers and compatibility with your existing pump ensures proper fit and operation. Choosing the right motor helps maintain efficient performance and prevents system damage.

Need help finding the right Nidec / U.S. Motors part?

At Bath & Spa Parts Online, we carry a wide selection of Nidec / U.S. Motors pool, spa, and bath parts ready to ship. Can’t find what you need? Contact our Product Specialists at 800-918-9143, use the live chat, or visit our Contact Us page. For installation guides, part diagrams, and troubleshooting resources, visit the Bath & Spa Parts Online Knowledge Base for expert support.