Flux Concentrators / Shields

Wound Cut Core

High-Precision Magnetic Core for Flux Concentration and Current Sensing

High-Precision Toroidal Cut Cores for Advanced Current Sensing

Engineered from premium Nickel-Iron and Silicon-Iron alloys, our cut cores undergo controlled hydrogen annealing to deliver superior linearity and minimal energy loss.

High-Linearity Soft Magnetic Cores for Current Sensing

PML’s soft magnetic cut cores provide a high-efficiency solution for flux concentration with minimal signal distortion. Our controlled manufacturing process ensures optimal magnetic permeability, making these cores ideal for critical medical and industrial electronic applications.

Magnetic & Chemical Properties

Magnetic & Chemical Properties
Sr. No.	Properties	Measurement	Unit	80% NiFe⁷	Mumetal⁷	48% NiFe⁸	Si Steel	Fe-49% Co-2%V
1	DC Magnetic Properties	Bs	Tesla	0.75¹	0.76¹	1.5³	1.73⁹	2.25(11)
		Br	Tesla	0.4²	0.5²	1.1³	-	1.3
		B at 100 A/m	Tesla	-	-	1.2	-	-
		Hc²	A/m	0.35	0.6	2.8	-	40 to 160(12)
		µ4⁴	-	550000	120000	-	-	-
		µ max	-	570000	350000	190000	-	18000
2	60Hz AC Magnetic Properties	µ4z⁵	-	70000	50000	10400	>2500	1200
		µz8⁶	-	-	-	54000	-	-
		µ max	-	95000	95000	-	-	12000
		Core loss	W/Kg	0.015	0.015	0.4	3.9¹⁰	2.3 to 3.0(13), 3.8 to 5(14)
3	Chemical Composition	Ni	%	78-81	78-81	47-48	Nil	-
		Mo	%	4.5-6	4.5-6	Nil	Nil	-
		Si	%	0.05-0.4	0.05-0.4	0.1	1.6 - 2.1	-
		Mn	%	0-0.5	0-0.5	0.5	0.5	-
		C	%	0.01	0.01	0.005	0.01	-
		Co	%	-	-	-	-	49
		V	%	-	-	-	-	2
		Fe	%	Balance	Balance	Balance	Balance	Balance
4	Physical Properties	Density	g/cm³	8.7	8.7	8.2	7.75	8.12
		specific Heat	J/Kg.˚C	460	460	500	-	460
		Thermal conductivity	W/m.˚C	19	19	13	-	33
		Mean CTE between -50˚C & +200˚C	˚C⁻¹	12 x 10⁻⁶	12 x 10⁻⁶	8 x 10⁻⁶	-	9.7 x 10⁻⁶
		Electrical resistivity	µΩ.cm	60	60	45	-	40
		Curie Point	ᵒC	420	420	450	-	950
		Coefficient of magnetostriction at Saturation ∆l / l	-	1-3 x 10⁻⁶	1-3 x 10⁻⁶	24 x 10⁻⁶	-	70 x 10⁻⁶
		Melting temperature	ᵒC	1450	1450	1425	-	1480
		Hardness(Cold Worked)	Hv	325	325	250	-	400
		UTS(Cold Worked)	MPa	1050	1050	850	-	1200
		0.2% PS(Cold Worked)	MPa	1030	1030	820	-	1150
		Elongation(Cold Worked)	%	3	3	3	-	2
		Hardness(Annealed)	Hv	160	160	140	155	220
		UTS(Annealed)	MPa	650	650	500	380	480
		0.2% PS(Annealed)	MPa	280	280	250	250	300
		Elongation(Annealed)	%	35	35	40	min 30	4.5
		Grain Size(Annealed)	-	8	8	9	-	-
		Hardness(Finished Part)	Hv	110	110	100	-	-
		UTS(Finished Part)	MPa	530	530	450	-	-
		0.2% PS(Finished Part)	MPa	160	160	200	-	-
		Elongation(Finished Part)	%	45	45	35	-	-
		Grain Size(Finished Part)	-	0-3	0-3	0	-	-

Dimensions and Tolerances

DIMENSIONS AND TOLERANCE
Outer Diameter (mm)	Tolerance (mm)	Inner Diameter (mm)	Tolerance (mm)	Height Tolerance (mm)
< 10	± 0.4	< 10	± 0.3	± 0.3
< 25	± 0.5	< 25	± 0.4	± 0.4
< 50	± 1.0	< 50	± 0.5	± 0.5
< 80	± 1.25	< 80	± 0.75	± 0.8
< 100	± 1.5	< 100	± 0.8	± 0.8
< 160	± 2.0	< 160	± 1.3	± 1.5
< 200	± 2.5	< 200	± 1.5	± 1.5
< 320	± 2.5	< 320	± 2.0	± 2.0

NOTE: General Cutting gap tolerance will be ± 0.5mm

Key Features

Manufactured using high-permeability Nickel-Iron or Silicon-Iron alloys

Controlled annealing for consistent magnetic properties

Durable varnish impregnation coating for mechanical protection

Custom dimensions available on request

Ideal for current sensors and flux concentrators

Low core loss, high linearity, and very low hysteresis

Applications

Ideal for high-accuracy current measurement in:

Automotive systems

Aerospace applications

Medical equipment

Renewable energy solutions

Power testing and analysis

Industrial transformers

High EMI environments

Trust Reliability & Quality

With over 60 years of manufacturing excellence, PML delivers Wound cut cores trusted by OEMs and Tier 1 suppliers across sectors demanding robust performance.