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Mu-metal shielding cans are specialized high-permeability nickel-iron enclosures designed to eliminate EMI/RFI hum in audio transformers, typically by attenuating low-frequency magnetic fields. They are essential for high-end audio preamps, mic transformers, and toroidal transformers to prevent noise from polluting sensitive audio signals.
Top Mu-Metal Shielding Can Options
- Magnetic Shield Corporation MuMETAL® Cans: Offers a wide range of standard round/rectangular cans and custom sizes, including deep-drawn cans (up to 3:1 depth ratio) that are 5-sided with optional lids.
Key Features and Specifications
- Material: High-permeability Nickel-Iron alloy (~80% Nickel), which provides maximum attenuation of low-intensity magnetic fields.
- Annealing: Must be annealed (hydrogen atmosphere) after forming to restore magnetic properties.
- Shapes: Available in cylindrical (best for 360° uniform shielding) and rectangular (for PCB mounting) designs.
- Thickness: Commonly 0.020 in / 0.50 mm or 0.032 in / 0.80 mm.
Tips for Best Performance
- Use Lids: Choose 5-sided cans with lids to close the magnetic circuit completely.
- Mounting: Use non-magnetic hardware to mount the shield to avoid introducing new magnetic fields.
- Orientation: For maximum attenuation, multiple concentric cans can be used, according to Magnetic Shield Corporation.
Would you like information on custom-sized shields or standard, off-the-shelf options?
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Web results
Toroidal Transformer Mu-Metal Shielding Enclosure MuCan
don-audio.com
https://www.don-audio.com › Trafo shielding
don-audio.com
https://www.don-audio.com › Trafo shielding
MuCan is designed to eleminate hum in high-end audio systems or when toroidal radiation must be eleminated completely in most sensible electronic equipment.Read more
$137.70In stock$14.95 delivery14-day returns
Mu-Metal Transformer Can - Hermetic Packages
hi-techhermeticseal.com
https://www.hi-techhermeticseal.com › products_detail
hi-techhermeticseal.com
https://www.hi-techhermeticseal.com › products_detail
Specializing in the production of Mu metal magnetic shielding cans for audio transformer and other audio equipments.Read more
Deep Drawn MuMETAL® Cans - Now Available In Stock
Magnetic Shield Corporation
https://www.magnetic-shield.com › News
Magnetic Shield Corporation
https://www.magnetic-shield.com › News
Aug 31, 2020 — We offer a wide range of 5-sided magnetic shielding MuMETAL® Cans stamped or formed in either round or rectangular shapes, and deep-drawn up to a 3:1 depth ...Read more
Mu Metal Can (100% Made in the USA!)
Geistnote
https://geistnote.com › Shop All
Geistnote
https://geistnote.com › Shop All
Dec 15, 2023 — Mu Metal Can used for shielding transformers inside microphones. This will fit transformers like the cinemag, ll1912, gn C36, AMI, etc.Read more
$14.95Out of stock
Mu-metal transformer shielding can specifications
GroupDIY Audio Forum
https://groupdiy.com › ... › Magnetics
GroupDIY Audio Forum
https://groupdiy.com › ... › Magnetics
Nov 17, 2023 — I am looking at shielding cans on transformers from Cinemag and Sowter and the thickness of the mumetal seems to be between 0.7-1mm.Read more
Discussions and forums
Nickel lamination transformers with mu-metal shielding
Facebook ·Â
Pro Audio DIY
 · 10+ comments
 · 1 year ago
Nickel lamination transformers with mu-metal shielding
Facebook ·Â
Pro Audio DIY
 · 10+ comments
 · 1 year ago
How critical is mu metal shielding in mic transformer?
GroupDIY Audio Forum ·Â
6 years ago
How critical is mu metal shielding in mic transformer?
GroupDIY Audio Forum ·Â
6 years ago
Shielding metal
diyAudio ·Â
14 years ago
Shielding metal
diyAudio ·Â
14 years ago
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Web results
Home / Shielding Series
Jiangsu Hongyun Precision Industry Co., Ltd.
https://www.hongertech.com › shielding-series_c4
Jiangsu Hongyun Precision Industry Co., Ltd.
https://www.hongertech.com › shielding-series_c4
Deep Drawn Mu-metal Shielding Cans are designed for protecting sensitive circuits from unwanted parasitic magnetic fields, they are typically applied in audio ...Read more
MuMetal Cans Archives
Vigortronix Ltd
https://www.vigortronix.com › product-category › cans...
Vigortronix Ltd
https://www.vigortronix.com › product-category › cans...
Vigortronix manufactures and supplies MuMetal magnetic shielding cans for transformers and other sensitive electronic components.Read more
Mu Metal Shield
eBay
https://www.ebay.com › shop › mu-metal-shield
eBay
https://www.ebay.com › shop › mu-metal-shield
Explore a wide range of our Mu Metal Shield selection. Find top brands, exclusive offers, and unbeatable prices on eBay. Shop now for fast shipping and easy ...
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Web results
OEP A262 Mu-Metal Screening Can for Transformers
Camden Tools
https://camdentools.com › Shop
Camden Tools
https://camdentools.com › Shop
The OEP A262 Mu-Metal Screening Can is a high-quality enclosure designed specifically for audio frequency transformers. Constructed from a nickel iron alloy, ...Read more
£9.62Free delivery28-day returns