P, PS, PCH

P cores (Pot cores) are available in a wide range of sizes: 7 types in TDK (Epcos) product line comply with IEC 60133. The company offers a choice of different SIFERRIT materials, which permits the cores to be used  for a large variety of applications to over 100 MHz. Since the wound coil is completely enclosed by  the ferrite core, P cores feature low magnetic leakage. They can be easily and precisely adjusted to the most manifold inductor requirements. We naturally also supply the appropriate accessories for each core version. Most of the cores are available with threaded sleeves and screws for precision inductance adjustment. Adjustment curves are given for this purpose. These relate to the particular recommended combination of screw core/core material A_L value and must be understood as typical values. 

P core halves for proximity switches (PS cores) can be used as nonсontacting motion detectors and output indicators.

• Detection of the final position on conveyor belts
• Counters at rotating parts
• Contactless detection of pointer position of pointer-type measuring and control instruments

The advantages of proximity switches are bounceless switching, no mechanical wear, insensitivity to contamination and detection of metallic parts only. TDK  supplies P core halves/PS cores with diameters ranging from 7.35 to 150 mm for inductive proximity switches. Their dimensions are matched to standardized switches. Maximum operating distances can thus be achieved for the individual P core sizes.The SIFERRIT material N22 is particularly suitable for the frequency range from 0.1 to 0.8 MHz. The material M33 is additionally available for higher frequencies (core types with 5.6 to 14.0 mm diameter). 

Thermoplastic coil formers can be supplied for most of the core types. This material permits an operating temperature range of –60 to +120 °C. Consequently, temperatures of up to +120 °C are also permissible during encapsulation. 

Applications:

The cores are suitable for:

• High-quality resonant circuit inductors (filters) with high inductance stability (materials K1, M33, N48).
• Low-distortion broadband small-signal transformers in materials T38 and N30 with high A_L value.
• Wideband signaling transformers with a high value of single-turn inductance (T38, K1 ferrite materials).
• Power applications. Here, pot cores without center hole made of material N87 are used as standard. As a result of their larger effective magnetic cross-sectional area, these types are characterized by a higher AL value, better flux density distribution and, consequently, a reduced power loss.

P cores Dimensions

Standard Size	d1  [mm]	d2 [mm]	d3  [mm]	d4  [mm]	h1 [mm]	h2 [mm]	PDF
P 3.3 x 2.6	3,35-0,17	2,45+0,15	1,2-0,1		2,6-0,1	1,7+0,1
P 4.6 x 4.1	4,65-0,19	3,70+0,15	2,2-0,1	1,4+0,05	4,1-0,1	2,7+0,2
P 5.8 x 3.3	5,80-0,25	4,50+0,2	2,5-0,15	0,95+0,1	3,4-0,3	2,2+0,2
P 7 x 4	7,35-0,25	5,8+0,2	3,0-0,1	1,4+0,05	4,2-0,1	2,8+0,2
P 9 x 5	9,3-0,3	7,5+0,25	3,9-0,2	2,0+0,1	5,4-0,2	3,6+0,3
P 11 x 7	11,3-0,4	9,0+0,4	4,7-0,2	2,0+0,1	6,6-0,3	4,4+0,3
P 14 x 8	14,3-0,5	11,6+0,4	6,0-0,2	3,0+0,1	8,5-0,3	5,6+0,4
P 18 x 11	18,4-0,8	14,9+0,5	7,6-0,3	3,0+0,1	10,6-0,2	7,2+0,4
P 22 x 13	22,0-0,8	17,9+0,6	9,4-0,3	4,4+0,2	13,6-0,4	9,2+0,4
P 26 x 16	26,0-1,0	21,2+0,8	11,5-0,4	5,4+0,2	16,3-0,4	11,0+0,4
P 30x 19	30,5-1,0	25,0+0,8	13,5-0,4	5,4+0,2	19,0-0,4	13,0+0,4
P 36 x 22	36,0-1,0	29,9+0,8	16,2-0,4	5,4+0,3	22,0-0,6	14,6+0,4
P 41 x 25	41,0-1,1	34,0+0,9	17,5-0,5	5,5+0,2	25,0-0,6	17,0+0,6
P 47x 28	47,0-1,3	39,0+1,8	20,0-0,6	5,5+0,2	28,0-0,4	19,0+0,6

Accessories for P Cores

Example of assembly P-cores set for PCB:

PS cores and P core halfs (PCH)  Dimensions

Standard Size	D1  [mm]	D2  [mm]	D3  [mm]	D4  [mm]	h1  [mm]	h2  [mm]	PDF
PS 7.35 x 3.6	7,35-0,3	5,8+0,15	3,0-0,15	1,05+0,1	3,6-0,1	2,8+0,2
PS 7 x 3.5	9-0,4	7,3-0,3	3,9-0,3	1,95+0,15	3,5-0,1	2,6+0,2
PCH 14 x 7.5	14,4-0,6	11,6+0,5	6,0-0,3	2,95+0,25	7,5-0,2	5,6+0,3
PS 25 x 8.9	24,8-1	20,5+0,8	11,3-0,5	5,2+0,4	8,9-0,2	5,9+0,3
PS 30.5 x 10.2	30,5-1	25,8+0,8	13,5-0,4	5,4+0,2	10,2-0,5	7,0+0,4
PS 35 x 10.8	35-1	29,2+1,2	15,7-0,6	5,3+0,3	10,8-0,5	7,2+0,4
PS 47 x 14.9	47-1,3	39+1,8	20-0,6	5,5+0,2	14,9-0,7	10+0,5
PS 68 x 14.5	68-2,2	57,5+1,8	29,5-1	8,5+0,5	14,5-1	9+0,6
PCH 70 x 14.5	70-2,2	57,5+1,8	29,5-1	8,5+0,5	14,5-1	9+0,6
PCH 150 x  30	150±3	130±2,5	65±1,2	26±1,2	30+2	15+2

Information for Ordering

These cores are supplied in sets.

Example of EPCOS ordering code structure: 

N48 P14 x 8 A_L=160 nH ±3% B65541+0160A048
P14 x 8 - core shape 
B65641 - part number
+0160 -  A_L value in nH (A_L=160 nH) given only for gapped cores. Not specified for ungapped cores
A — А_L (±3% for letter "A") tolerance
048 -  N48 material