Rectangular Modulus Cores (RM Cores Soft Ferrite)

Transcription

1 RM (Rectangular modular) cores arose due to the demand for coil formers with integrated pins that allow for efficient winding and high PCB packing densities. Clamps engaging in recesses in the core base hold the cores in place, meaning glue is not normally required in this process. Typical applications are Switch Mode Power Supplies (SMPS), Current Transformers, Pulse Transformers, Energy Storage Chokes and fly-backs. RM cores are unique in that there designation i.e. RM10 refers to the PCB grid that the core with Bobbin and Clip with fill. An RM10 will fill a square basic area of 10x10 grid layout 25.4x25.4mm 2 RM cores are normally supplied with a solid spigot. Adjustable Inductor versions are also available. Soft Ferrite Cores RM 4 (Solid) Σ(l/A) C1 1.7 mm -1 l e mm Ae mm 2 Amin mm 2 volume Ve 286 mm 3 A B C D F G H J Grade AL Tolerance on F / Soft Ferrite Cores RM 5 (Solid) Σ(l/A) C mm -1 l e mm Ae mm 2 Amin mm 2 volume Ve 526 mm 3 A B C D F G H J F / F / F / F ± * F5C 315 ± S49* F ± * F ± * F ± * Page 1 of 5

2 Soft Ferrite Cores RM 6 (Solid) Σ(l/A) C mm -1 l e mm Ae mm 2 Amin mm 2 volume Ve 1090 mm 3 A B C D F H J 2.90 nom. K F ± E F / E F / F / F / F ± * F ± * F 5A 160 ± * F ± * F ± * Soft Ferrite Cores RM 7 (Solid) applications (F5C). Σ(l/A) C mm -1 l e mm Ae mm 2 Amin mm 2 volume Ve 1340 mm 3 A B C D F H J K nom. F / F 5C 160 ± S49* P ± * Page 2 of 5

3 Soft Ferrite Cores RM 8 (Solid) Σ(l/A) C mm -1 l e mm Ae mm 2 Amin mm 2 volume Ve 2430 mm 3 A B C D F H K nom. F / F / F / F / F 5A 400 ± S49* F 5A 250 ± * F ± * F ± * F 5A 160 ± S49* F ± * F ± * Soft Ferrite Cores RM 10 (Solid) Σ(l/A) C mm -1 l e mm Ae mm 2 Amin mm 2 volume Ve 4310 mm 3 A B C D F H K nom. F / F / F / F 5A 630 ± S49* F ± * F ± * F ± * F 5A 160 ± * Page 3 of 5

4 Soft Ferrite Cores RM 12i (Solid) Σ(l/A) C mm -1 l e mm Ae mm 2 Amin mm 2 volume Ve 8340 mm 3 A B C D F G H F / F / F / F / F / * F / * F / * Soft Ferrite Cores RM 14i (Solid) Σ(l/A) C mm -1 l e mm Ae mm 2 Amin mm 2 volume Ve mm 3 A B C G H J 5.60 nom F / F / X-47* F / * F / * Page 4 of 5

5 Soft Ferrite Cores RM 14i RM cores can also be supplied without the centre hole. Σ(l/A) C mm -1 l e mm Ae mm 2 Amin - mm 2 volume Ve mm 3 A B C E 5.20 min G H J 5.60 nom F / Soft Ferrite Cores RM 14 RM cores can also be supplied without the centre hole. Σ(l/A) C mm -1 l e mm Ae mm 2 Amin - mm 2 volume Ve mm 3 A B C E H J K nom. AL (%) Gap Length (mm) Effective Permeability Part F 5a 250 ± * Page 5 of 5