Import Ei40 Soft Ferrite Core, Ferrite Core Ei 28 — Buy in Bulk from Supplier in China

The Ei40 Soft Ferrite Core, also known as Ferrite Core Ei 28, is a magnetic core used in high‑frequency power applications. It is offered in multiple shapes including toroidal, EE, EC and EI, allowing designers to select the geometry that best fits their winding layout. The core composition is a manganese‑zinc ferrite (Mn‑Zn) with grades RM2.3KD and RM3.3KD, providing low loss at high frequencies. The supplier notes RoHS compliance and ISO 9001:2000 certification for its production processes.

Standard dimensions for the toroidal type range from 10 mm to 100 mm in outer diameter, with a typical inner‑diameter tolerance of ± 0.2 mm. Typical initial permeability values lie between 2000 and 5000, and core loss at 100 kHz is usually 0.5‑1.5 W/kg, matching industry norms for Mn‑Zn ferrites. The cores are designed for frequencies up to 500 kHz, making them suitable for switching power supplies and RF filters. Thermal stability is typical up to 150°C, after which magnetic properties may degrade.

Manufacturers of SMPS, inverters and high‑frequency transformers commonly select these cores for their low hysteresis loss and compact size. The supplier accepts OEM orders and offers free samples, which can be used to validate magnetic performance before full production. Shipping terms such as FOB or CIF are negotiable, and payment can be arranged via L/C or T/T upon agreement. Buyers should confirm minimum order quantities and any custom shape requirements directly with the supplier.

Tianjin Everbloom Technology Co., Ltd. is situated in the Hongqiao District of Tianjin, China. The company is classified with a harbour trust tier and does not display a response rate or average response time, so communication may need persistent follow‑up. It markets magnetic components and accepts OEM orders for custom ferrite cores.

The listing highlights ISO 9001:2000 certification and RoHS compliance, and mentions that free samples are available for evaluation. Production capacity, MOQ and lead‑time details are not disclosed, so interested buyers should request these specifics along with any additional quality certificates before placing an order.