251M Series

Face-down Terminal
Complete lead-free

To meet the users' demands for smaller and high-function portable information devices, we developed compact and low profile tantalum capacitors with appropriately designed mounting area for high-density mounting ahead of other companies.
The capacitors are widely used in portable information and telecommunication equipment, such as mobile phones and smartphones, digital video cameras, digital still cameras and portable AV equipment. The tantalum capacitors designed for high-density mounting will considerably contribute to miniaturization and improvement of performance of these portable multimedia devices.


Type 251 M Series
Category Temperature Range -55~+125℃
Rated Temperature +85℃
Rated Voltage
Capacitance 0.47µF~330µF
Capacitance tolerance ±20%(M)/±10%(K)
Failure Rated Level 1%/1000h


  • Using the face-down terminal structure makes it possible to design the land in almost the same size as the terminal. As the result of this, parts can be downsized, and the mounting area can be reduced to 1/2 to 1/3 of that required by conventional structures.
  • Type 251 in size 1005 to 3216 are applicable to a wide capacitance range from 0.47 to 330 μF.
  • This type of capacitors is suitable for ultra miniaturized, such as DVC, DSC, SSD, smart phones, hearing aids and high functionally compact portable devices.
  • Case M (face-down terminal type 1608) and case S (face-down terminal type 2012) of this type are listed in the Surface Mounting Device-Outline Registration System of Electronic Device Registration Center of JEITA.
  • Lead-free and RoHS Compliant.

Application classification

The application classification by use which divided the market and use into four is set up supposing our products being used for a broad use.

Please confirm the application classification by use of each product that you intend to use.

Moreover, please be sure to inform to our Sales Department in advance in examination of the use of those other than the indicated use.

Market Application classification by use Use Recommendation Type
Outline Typical example of application Chip Tantalum Capacitors
High reliability apparatus 1

- Apparatus in which advanced safety and reliability are demanded.

- Whether failure of the apparatus which cannot maintenance exchange products, and a product is direct for a human life, apparatus which changes or may cause a fatal system failure.

- Space development apparatus relation (Satellite, Rocket, Artificial Satellite)

- Aviation and a defensive system

- Atomic power, fire power, and a water-power generation system

Type 267 P Sereis



Industrial apparatus


- Apparatus in which reliability is important.

- The apparatus in which maintenance exchange of a product is very difficult, and failure of a product influence a human life, or the range of failure is wide range.

- Vehicles control of transport machines, such as a car, and a railroad, a vessel (Engine control, drive control, brake control)

- The operation control system of the Shinkansen and a main artery

Type 267 N Sereis
Type 271 N Sereis
Type 279 M Sereis
3 - Apparatus which can maintenance exchange products, and apparatus in which the loss of the system failure is large although failure of a product does not influence a human life, and maintenance engineering is demanded

- Vehicle indoor loading parts, such as an air-conditioner and car navigation, and in-vehicle communication facility

- Security management system for home/buildings etc.

- Control apparatus, such as Industrial use robots and a machine tool etc.

Type 267 M Sereis
Type 267 E Sereis
Type 281 M Sereis
Type TCA
Apparatus in general 4

- The small size and the thin article which applies leading-edge technology positively

- The product supposing being used widely in the market for the apparatus which can maintenance exchange products, and apparatus with a partial system failure by failure of product.

- Smart phone, Mobile phone, Mobile PC (tablet), Electronic dictionary

- Desktop PC, Notebook PC, Home network

- Amusement apparatus (Pachinko,Game machine)

Type 251 M Series
Type 251 T Series
Type 281 E Series
Type TCB

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