1、 EIA 314 65 3234600 00b5437 1 I . EIA STANDARD Envelope and Mounting I +4 Dimensions for Encapsulated Transformers and Inductors w (Using Cores Listed in Table I of EIA Standard RS-217-A) i. May 1965 Engineering Department ELECTRONIC INDUSTRIES ASSOCIATION L - -y EIA 314 b5 W 3234b00 0065438 3 W NO
2、TICE EIA engineering standards are designed to serve the public interest through eliminating mis- understandings between manufacturers and purchasers, facilitating interchangeability and improve- ment of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper p
3、roduct for his particular need. Existence of such standards shall not in any respect preclude any member or non-member of EIA from manufacturing or selling products not conforming to such standards. Recommended standards adopted by EIA are without any regard to whether or not their adop tion may in
4、any way involve patents on articles, materials, or processes. By such action, EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the recommended standards. Published by ELECTRON IC INDUSTRI ES ASSOCIATION Engineering Department 11 We
5、st 42nd Street, New York, N. Y. 10036 a 0 Electronic Industries Association 1965 All Rights Reserved Price $60 Printed in .S.A EIA 314 65 3234600 0065439 5 M RS-3 1 4 Page 1 ENVELOPE AND MOUNTING DIMENSIONS FOR ENCAPSULATED TRANSFORMERS AND INDUCTORS USING CORES LISTED IN TABLE I OF EIA STANDARD RS-
6、217-A O (From Standards Proposal No. 841 formulated under the cognizance of EIA Working Group P-3.5 on Mounting Dimensions for 400 Cycle Encapsulated Transformers, and Committee P-3 on Inductive Components.) 1. SCOPE This standard establishes the maximum envelope dimensions and nominal mounting dime
7、nsions for encapsulated transformers and inductors using cores listed in Table I of EIA Standard RS-217-A. This standard also establishes formulae from which these dimensions are developed. For the purposes of this standard, encapsulated units shall be those which are either dipped, con- formally co
8、ated, cast, embedded, molded, encased, impregnated, filled or otherwise protected with a non-metallic substance. 2. EXPLANATORY NOTES 2.1 Dimensions other than screw threads are in inches. 2.2 The transformer or inductor configuration shall be determined by the manufacturing process. 2.3 Tolerances
9、on mounting dimensions L and M in Tables 1, 2 and 3 are: Unit with Mounting Stud Size Tolerance 4-40,6-32,8-32, and 10-32 -t. %4 x-20 and 5/i6-18 f 1/32 Dimensions L and M shall be located symmetrically to the maximum H and J dimensions, respec- tively, within $64 inch. 2.4 Mounting studs lengths an
10、d tolerances shall be specified in the complementary documents, such as drawings or purchase specifications, for the transformer or inductor. Mounting screw inserta or clearance holes may be supplied in lieu of studs when specified. 2.5 Envelope dimensions do not include terminal extensions. 2.6 Any
11、 computed envelope dimension which has a sum total resulting in a fraction of less than 1/32 is carried to next highest g2 of an inch. 2.7 Any computed mounting dimension which has a sum total resulting in a fraction of less than l/is inch is carried to the next highest 1/i6 inch. 2.8 The formulae i
12、ncluded in paragraph 3.3, 4.3, and 5.3 are based on the dimensions contained in Figure 1. RS-217-A, Wound Cut Cores, available from EIA Engineering Office, Room 1000, 11 West 42nd Street, New York, New York 10036 at $.70 per copy. RS-3 14 Page 2 EIA 314 65 m 3234600 0065440 1 m I. . FIGURE 1 WOUND C
13、UT CORE DIMENSIONS : 3. SIMPLE TYPE CONSTRUCTION 3.1 Table 1 lists the envelope and mounting dimensions for transformers and inductors with cores recommended for usage in the simple type transformer construction. TABLE 1 3.2 Figure 2 shows the letter designation applied to each dimension included in
14、 Table 1. EIA 314 b5 = 3234b00 00b5441 3 RS-3 1-4 Page .3 FIGURE 2 SIMPLE TYPE CONSTRUCTION - - - - I_- - - 3.2.1 The dimensions in Table 1 and th& outline in Fiare 2 depict envelope dimensions only, they do not establish a finished configuration. (See Note 2.2) 3.3 The formulae used to develop the
15、dimensions included in Table 1 are: 3.3.1 Length: H = B max + 7/iS (See Note 2.6) 3.3.2 Width: (See Note 2.6) 3.3.3 Height: (See Note 2.6) 3.3.4 Mounting: L = G + E I (See Note 2.7) 3.3.5 Mounting: IV = 1.5 F + D (See Note 2.7) 4 J = D rnax + 2.5 F + K = A max + F + l/iS 4. SHELL TYPE CON$TRUCTION 4
16、1 Table 2 lists the envelope and mounting dimensionsfor transformers and inductors with cores recommended for usage in the shell type transformer construction. . , I EIA 314 b5 m 3234b00 00b5442 5 m RS-314 Page 4 TABLE 2 SHELL TYPE CONSTRUCTION I I I I I I I 4.2 Figure 3 shows the letter designatio
17、n applied to each dimension included in Table 2. FIGURE 3 SHELL TYPE CONSTRUCTION 4.2.1 The dimensions in Table 2 and the outline in Figure 3 depict envelope dimensions only, they do not establish a finished configuration. (See Note 2.2) o EIA 314 b5 = 3234600 00b5443 7 RS-3 1 4 Page 5 4.3 The formu
18、lae used to develop the dimensions included in Table 2 are: 4.3.1 Length: H = B max + 7/i6 (See Note 2.6) 4.3.2 Width : J = D max + 2.5 F + (See Note 2.6) 4.3.3 Height: K = 2 A max + (See Note 2.6) 4.3.4 Mounting: L = G + E (See Note 2.7) 4.3.5 Mounting : M = 1.5 F + D (See Note 2.7) 5. CORE TYPE CO
19、NSTRUCTION 5.1 Table 3 lists the envelope and mounting dimensions for transformers and inductors with cores recommended for usage in the core type transformer construction. TABLE 3 CORE TYPE CONSTRUGTION L 5.2 Figures 4A and 4B show the letter designation applied to each dimension included in Table
20、3. _2_ EIA 314 b5 m 3234b00 0065444 9 m RS-3 1 4 Page 6 FIGURE 4A CORE TYPE CONSTRUCTION _ ._ - FIGURE 4B CORE TYPE CONSTRUCTION (ALTERNATE METHOD) 5.2.1 The dimensions in Table 3 and the outline in Figure 4A and 4B depict envelope dimensions only, they do not establish a finished configuration. (Se
21、e Note 2.2) 5.3 The formulae used to develop the dimensibris included in Table 3 are: 5.3.1 Length: H = B max + (See Note 2.6) 5.3.2 Width: (See Note 2.6) 5.3.3 Height: K = B max + : (See Note 2.6) 5.3.4 Mounting: L t G + E (See Note 2.7) 5.3.5 Mounting : M = .75 F + D (See Note 2.7) J = D Max + 1.25 F +
