0.94" Toroid      
Qty: 4    

Powdered Iron Core

NOS Arnold Engineering part nr PT940-LL

OD: 0.94" (24mm)   ID: 0.56" (14.3mm)   Height: 0.32"  (8.0mm)

Magnetic path length:  5.73cm

Effective Core Area:  0.374cm^2

Effective Core Volume:  2.14cm^3

Inductance Index:  57.0 nH/N^2

Material: Arnold  Mix nr "LL"  (low loss)

Permeability:  70 +/-10%

Grey and blue epoxy enamel coated

This material is powdered iron, not ferrite. It is not suitable for transformers, only inductors. It has a distributed air gap inside the core, and thus stores energy (ideal transformer must not store energy).

It is suitable for high power filters and chokes, carrying large ripple currents and/or large DC current components, which would otherwise saturate a ferrite core.

It is not suitable for transformers in the forward transfer mode, only inductors. OK for FLYBACK transformer ( which is not a real x-former, but a coupled inductor). Not OK for Forward, Push-Pull, Half-Bridge or Full Bridge transformers 

NOTE: POWDERED IRON IS HEAVIER THAN FERRITE

Combined S&H savings on this item is limited by actual USPS chargeable weight

Purchases can only be changed or cancelled before payment.

Delivery dates provided by eBay are not guaranteed. Transit time can be 5-7 business days in USA after 1-2 day processing, however USPS does not guarantee these times, and can exceed them. If you have any time constraints, please contact seller before bidding / buying, to discuss shipping arrangements and delivery dates.  

PAYMENT CLOSES ORDER AND COMMITS IT FOR SHIPPING. Your shipping label is created and billed along with insurance the moment you click "PAY". Paypal and insurance charges are non-recoverable. No cancellation possible after payment.

Any returns not resulting from seller wrongdoing will be assessed a restocking fee of 18% and will forfeit shipping costs.

International transit times can reach 8 weeks, 10 weeks for Italy and Brazil. Contact seller for alternate shipping options if this is not acceptable to you.

RETURNS can only be made with parts that have not been soldered. Before using, buyer must test one part as per the test information in the manufacturer's data sheet. This test is easy for any engineer or technician. This product is aimed at the industrial market. It is not a consumer product.