Apr.16, 2009

Minebea Co., Ltd.
Minebea Motor Manufacturing Corporation

Commercialization of Weather-Resistant, Long-Life,
High-Performance AC Fan Motors

~ High reliability is achieved and all kinds of use environments, such as machine tools, inverters, solar light generation systems and re-chargers for electric vehicles ~

Minebea Co., Ltd. and Minebea Motor Manufacturing Corporation (collectively "Minebea") have commercialized a series of weather-resistant (oil proof and dust proof), long-life AC fan motors for products used in harsh environments, such as machine tools and inverters, and for products used outdoors, such as solar light generation systems and re-chargers for electric vehicles.

Adopting a coil section formed in one piece of epoxy resin (note 1) and a labyrinth structure (note 2) in the rotating section, this series dramatically enhances oil proof and dust proof capabilities (equivalent to "IP54" (note 3)). Additionally, when compared with our conventional models, it improves static pressure by up to 30%. It comes in two sizes (120 Square and Φ170), as well as in a total of four types, which allows for selection of the best models for specific application needs. "Metal Blades Type" excels in oil proof requirement, while "Plastic Blades Type (PBT)" offers high static pressure and long wear requirement.

Users have to do troublesome maintenance work to use a fan motor in a harsh environment. Enhancing weather resistance in all kinds of environments, this series saves users' time and trouble required for the maintenance while at the same time contributing to lowering life cycle costs.

Outline of Series

< Size > 120 Square (119mm×38mm), Φ170 (150mm×172mm×38mm)
* Plastic Blades Type: 92 Square, 80 Square and 60 Square sizes are also available.
< Features > "Metal Blades Type" and "Plastic Blades Type (PBT)"
IP54-equivalent coil section
- Coil section formed in one piece of epoxy resin
- Dramatically improved oil proof and dust proof capabilities
< Expected life > Improvement to 100,000 hours at 25°C. (Plastic Blades Type)
(Conventional models: 50,000 hours at 25°C)
< Safety standards > JET, UL, VDE and CE are obtained.

Against a background of the high reliability of its own ball bearings assembled into fan motors, Minebea has approximately 60% share of the Japanese AC fan motor as the biggest domestic manufacturer. In this series, Minebea aims for annual sales of half a million units in 2010 and one million units in 2011, respectively-by expanding solution proposal-type products based upon customer needs, through such efforts as adopting miniaturized blades and long-lived ball bearings.

Product Photo of High Weather-Resistant, Long-Life, High-Performance AC Fan Motor Series

Product Photo of High Weather-Resistant, Long-Lived, High-Performance AC Fan Motor Series

Specifications (Summary)

Model 5915PC10TB30SM0
Impeller Metal Plastic (PC) Metal Plastic (PBT)
Rating Voltage (V) 100 100 100 100
Frequency (Hz) 50 60 50 60 50 60 50 60
Current (A) 0.53 0.45 0.47 0.44 0.45 0.34 0.37 0.29
Input Power (W) 42.0 40.0 37.0 33.0 20.0 17.0 18.0 15.5
Speed (min-1) 2650 3150 2700 3200 2600 3100 2600 3100
Max.Air Flow
5.3 6.3 5.0 6.0 2.8 3.3 2.6 3.0
Max.Static Pressure
127.5 163.8 157.0 215.8 88.0 100.0 94.0 100.0
Noise (dB) 48 53 52 56 46 50 40 44
All series are available on 100V, 115V, 200V, 220V, 230V and 240V.


1. Epoxy resin

Heat-hardening resin
Features of this resin are that it becomes hardened when heated, and that it will not melt even if re-heated. It excels in heat resistance, water tightness, chemical proof and weather resistance.

2. Labyrinth structure

A special structure that eliminates the incorporation of dust into the rotation axis and the coil section, this structure is called "labyrinth structure" because it has a complicated shape in itself.

3. Oil proof and dust proof

IP (Internal Protection) is "degrees of protection provided by enclosures (IP code)" referred to in JISC 0920(IEC 60529). The degrees of protection are expressed in two figures following the IP.


1st code 5: Protection against the penetration of solid foreign objects. The apparatus is dust proof.
2nd code 4: Protection against splashing water. This represents no splashed water effects from any direction.
Sales Inquiries: Minebea Motor Manufacturing Corporation
Fan Motor Sales Promotion Department
TEL 81-3-5434-8835
Media Inquiries: Minebea Co., Ltd.
Corporate Planning Division / Corporate Communications Office
TEL 81-3-5434-8637 FAX 81-3-5434-8607
Information in the press releases is current on the date of the announcement.
Product information, contact and other context are subject to change without prior notice.

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