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ALB Materials Inc
2360 Corporate Circle. Suite 400
Henderson, NV 89074-7739
United States
E-mail: sales@albmaterials.com

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Magnets Home > Products > Neodymium Magnets > Disc > D4x3.5mm Neodymium Magnet, 4 x 3.5mm Disc Magnet

D4x3.5mm Neodymium Magnet, 4 x 3.5mm Disc Magnet

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Item No.:	ALB-D4x3.5mm
Material:	NdFeB, Grade N42
Shape:	Disc
Dimension:	4mm dia. x 3.5mm thick
Tolerances:	±0.1mm x ±0.1mm
Weight:	0.330g
Grade:	N42
Coating:	Ni-Cu-Ni (Nickel)
Pull Force(lbs):	1.94 lbs (0.88kg)
Surface Field(Gauss):	5730 Gauss
Magnetization direction:	Axial (Poles on Flat Ends)
Max Operating Temp:	80°C
Product Drawing:	·

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Related Magnets

Other Grade D4x3.5mm Neodymium Magnets (4mm dia. x 3.5mm thick):

Grade	Item No.	Product Name	Pull Force	Inquiry
N35	ALB-D4x3.5mm-N35	D4x3.5mm-N35 Neodymium Magnets	1.63 lbs (0.74kg)	Inquiry
N38	ALB-D4x3.5mm-N38	D4x3.5mm-N38 Neodymium Magnets	1.63 lbs (0.74kg)	Inquiry
N40	ALB-D4x3.5mm-N40	D4x3.5mm-N40 Neodymium Magnets	1.77 lbs (0.80kg)	Inquiry
N42	ALB-D4x3.5mm	D4x3.5mm Neodymium Magnets	1.94 lbs (0.88kg)	Inquiry
N45	ALB-D4x3.5mm-N45	D4x3.5mm-N45 Neodymium Magnets	2.06 lbs (0.94kg)	Inquiry
N48	ALB-D4x3.5mm-N48	D4x3.5mm-N48 Neodymium Magnets	2.19 lbs (0.99kg)	Inquiry
N50	ALB-D4x3.5mm-N50	D4x3.5mm-N50 Neodymium Magnets	2.25 lbs (1.02kg)	Inquiry
N52	ALB-D4x3.5mm-N52	D4x3.5mm-N52 Neodymium Magnets	2.31 lbs (1.05kg)	Inquiry
N42SH	ALB-D4x3.5mmSH	D4x3.5mmSH Neodymium Magnets	1.94 lbs (0.88kg)	Inquiry

High Temperature D4x3.5mm Neodymium Magnets (4mm dia. x 3.5mm thick) are also available:

Neodymium Material Type	Maximum Operating Temp	Curie Temp
N (N35-N52)	176°F (80°C)	590°F (310°C)
NM (N35M-N52M)	212°F (100°C)	644°F (340°C)
NH (N33H-N52H)	248°F (120°C)	644°F (340°C)
NSH (N30SH-N50SH)	302°F (150°C)	644°F (340°C)
NUH (N28UH-N48UH)	356°F (180°C)	662°F (350°C)
NEH (N28EH-N48EH)	392°F (200°C)	662°F (350°C)
NAH (N28AH-N35AH)	428°F (220°C)	662°F (350°C)

The Thermal Characteristics listed above are values commonly associated with each magnet's grade or material. Actual performance in your application may vary with other factors, including the shape of the magnet, the Permeance Coefficient or load line, and how it is used in a circuit.

D4x3.5mm Neodymium Magnets (4mm dia. x 3.5mm thick) with other Coating are also available:

Coating Type	Overall Thickness	Salt Spray Test	Pressure Cooker Test
Ni-Cu-Ni (Nickel)	15-21 μm	24 hours	48 hours
NiCu + Black Nickel	15-21 μm	24 hours	48 hours
NiCuNi + Epoxy	20-28 μm	48 hours	72 hours
NiCuNi + Gold	16-23 μm	36 hours	72 hours
NiCuNi + Silver	16-23 μm	24 hours	48 hours
Zinc	7-15 μm	12 hours	24 hours

Each individual layer of Nickel and Copper are 5-7 μm thick. The Gold and Silver Coating layers are 1-2 μm thick. Test results shown to allow comparison between Coating options. Performance in your application under your specific test conditions may vary. Salt Spray testing conducted with a 5% NaCl solution, at 35°C. Pressure Cooker Test (PCT) conducted at 2 atm, 120°C at 100% RH.

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