DIN EN 61837-2:2012-04

The previous 2001 edition of DIN EN 61837-2 has been revised within the framework of regular reviewing of standards in the area of piezoelectric devices for frequency control and selection. The document is based on IEC 61240 and deals with standard outlines and terminal lead connections of surface mounted piezoelectric devices for frequency control and selection. All clauses and table contents of the standard have been completely revised and updated. Significant chapters of the standard deal with the configuration of the enclosures, designation of types, ceramic enclosure dimensions, lead connections and designations of ceramic enclosures. In this second edition, the types of enclosures are renamed to express their features in their names for better understanding. A relative comparison of the new types with old ones is listed in Table 1. The new names of enclosures express the configuration type, terminal lead numbers, sizes and arrangement of terminal pads. The details of definition are shown in clause 3: Configuration of enclosures, and clause 4: Designation of types. With respect to the first edition of IEC 61837-1, this standard includes the following additional enclosures: QCC-12/1407A, DCC-2/1206A, QCC-10/9272A, DCC-4/9070A, DCC-2/8045B, DCC-6/7834B, DCC-6/7050A, QCC-10/7050A, DCC-4/6035C, DCC-2/6035C, QCC-8/5045A, DCC-4/5032A, DCC-4/5032C, DCC-2/4818C, DCC-2/4115C, QCC-8/3838A, DCC-6/3838A, DCC-4/3225C, DCC-2/3215C, QCC-8/3030B, DCC-6/3030A, DCC-6/2520A, DCC-4/2520C, DCC-4/2020C, DCC-4/2016C, DCC-4/1612C, DCC-2/1612C. As a result, the new version contains a total of 38 enclosure types, which are listed in Table 1 - Designation of ceramic enclosures and which are described in detail in the remaining part of the document. The responsible committee is K 642 "Piezoelektrische Bauteile zur Frequenzstabilisierung und -selektion" ("Piezoelectric and dielectric devices for frequency control and selection") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.