Summary

Product Model Name

The model name system of our surface-mount (SMD) products is set as below.

Model Name configuration of Surface Mount Products

①　Symbol for NDK: N
②　Symbols for products: See Table 1.

Table 1:Symbols for products

Product symbol products
X Crystal unit
T Temperature-compensated crystal oscillator (TCXO)
H Oven-controlled crystal oscillator (OCXO)
V Voltage-controlled crystal oscillator (VCXO)
P Simple packaged crystal oscillator (SPXO)
Z Crystal clock oscillator
M Monolithic filter
S SAW device


③④The nominal dimensions (mm) of a product main body in the longitudinal direction is shown in two digits.
　　　The third digit is rounded off.
⑤⑥The nominal dimensions (mm) of a product main body in the lateral direction is shown in two digits.
　　　The third digit is rounded off.
　　　[Example]: In the case of 3.2 mm x 2.5 mm, it shall be 3225.
⑦Symbols for constituent materials and sealing methods: See Table 2.

Table 2 Symbols for sealing methods

Product sealing category Symbol Product sealing method Package material
Base Cover
Hermetic sealing C Adhesive sealing Ceramics
M Resin molding Resin
P Adhesive sealing Resin
G Glass sealing Ceramics
R Resistance welding sealing Ceramics Metal
S,D Seam welding Ceramics Metal
A Au/Sn solder sealing Ceramics Metal
H Resin sealing Ceramics Metal
Non-hermetic sealing W ― Board Metal
X ― Board Non-metal
Y ― Mold Metal
Z ― Mold Non-metal
Others B A printed circuit board on which multiple crystal elements were mounted with a nameplate attached to its top surface


⑧Detailed symbols for the order of model name registration: A to Z
When products designed as lead-mount ones have been converted during secondary processing into surface-mount ones, the product model names given before secondary processing are conventionally used to describe them.
Example: AT-41CD2 (AT-41 with a pedestal)

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