SHIELDED COMPONENTS 

Precision Metal Components
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Welcome to
Shielded Components

Shielded Components specialises in the design and manufacture of precision metal components including board level EMI / RF Shields and related small steel enclosures and components.
Located in Christchurch New Zealand, we supply components to telecommunications and electronics manufacturers throughout New Zealand, Australia, USA, and Europe. Shielded Components can manufacture any type of small metal components, designed and manufactured in our in-house tool room, or from any your existing drawings. 
Using specialised fabrication techniques, including CNC EDM wirecutting technology, precision forming machines, and high grade press tools, shields and components can be manufactured to custom needs, whilst maintaining a high standard of quality.

We a specialists in manufacturing EMI/RF PCB level shielding for the electronics industry. These through hole or surface mount shields are commonly used to protect systems against unwanted RF/EMI interference. 

We also pride ourselves on the ability to produce virtually any small metal components; ranging from connectors, clips and brackets, through to small enclosures and other specialised sheet metal parts. 

View our gallery to find examples of the types of parts we are currently manufacturing.

Precision Prototyping
(1-50 items)
  • Prototype supply of precision parts including folded and drawn shielding cans, clips, heatsinks, and brackets.

  • Complex shapes cut at very close tolerances.

Short Run Production
(10-1000 items)
  • Our experience in low volume manufacturing allows us to supply competitively priced, high quality products, even in small volume requirements.

  • Quick turn around, low cost tooling often results in lower overall part cost compared with other cutting methods such as laser/turret cutting, and chemical etching.

Whether its for a small number of prototypes, production runs, we can manufacture the precision metal components that you require!

PCB Shielding

 

Shielding is required in many electronic systems as an essential barrier to unwanted EMI/RF interference. 

Shielded Components is a leading supplier of Rf / EMI shielding cans
in New Zealand and exports these products internationally to manufacturers of radio, gps, and all types of telecommunications
and electronic products. 

 

If you have any questions about PCB level shielding designs, please contact our sales department toolservice@xtra.co.nz, and we can offer

no-obligation information on design ideas that may be suitable
for your application.


 

Shield Design
 

PCB shields can be designed in a variety of ways, each suitable for different shielding, placement and maintainance functions.

One Piece Folded
 

- Simple folded can enclosure.

Advantages: Simple and cost effective to design and manufacture.

Disadvantages: Once fixed to PCB, difficult to visually examine/repair
components underneath without removing. 

Two piece folded
 

- Wall with removable lid.

Advantages: Allows easy inspection and repair of components. 
Wall section can be machine placed and reflow solded allowing post production visual inspection/machine testing of components within. 
Lid section is clipped on at a later stage. The lid can be designed either using a dimple/hole locking system, or fingered lid. Both provide a secure fit with good electrical contact at several points around the can.
 
Disadvantages: More complex/expensive than one piece design.

Drawn Cans
 

- Pinch Trim

Advantages: Totally sealed enclosure.
Pinch trim manufacturing method results in straight sided
shield with no corner seams. 
Pinch trim uses less valuable PCB space and has good co-planalarity
(well within 0.05mm). 
Can be packaged in tape and reel for automated placement,
and reflow soldered.

Disadvantages: Once fixed to PCB, difficult to visually examine/repair components underneath without removing.

Drawn Cans
 

- Foot

Advantages: Totally sealed enclosure. 
Drawn can with external foot. Popular stype for reflow soldering 
and good co-planalarity (well within 0.05mm). 
Can be packaged in tape and reel for automated placement,
and reflow soldered.

Disadvantages: Once fixed to PCB, difficult to visually examine/repair components underneath without removing.

Shielding Plates
 

Advantages: These types of designs allow coverage of larger areas of a PCB to selectively shield and cater for differing components heights.
Can be solded to the PCB or fixed using fasteners/inserts.

Shielding Enclosure
 

Advantages: Two piece enclosure with removable lid.
The PCB is usually fixed within base unit and the lid fitted on top, creating total shielding around the entire circuit board.

Additional Designs
 

As well as the design ideas above, shields can also include any or all of the following options:
 

  • Through holes and slots for heat dissipation
    and component adjustment 

  • P.C.B. Mounting pin styles in any design or configuration
    (through hole or surface mount) 

  • Spot welded or soldered seams for extra strength and reliability 

  • High quality tin plating allows soldering to ensure a reliable
    electrical contact
    for effective shielding performance 

  • Names or part numbers etc embossed upon the shield surface 

  • There are virtually no limits on size or shape! 

  • Quantities from 10 - 100,000+

Materials
 

There are a number of choices of materials that can be
used for PCB EMI / Rf shields. 

- Tinplated Steel
- Nickel Silver Alloys
- Brass
- Phosphor Bronze
- Stainless Steel


The most popular material in use is Tinplated Steel. The advantages of this material are its low cost, excellent solderablity, is RoHS complaint and has an attractive finish. High quality tin plating allows soldering to ensure a reliable electrical contact for effective shielding performance.

We stock this material in 0.22mm, 0.25mm and 0.35mm in a number of different tempers. 

Nickel Silver alloys are also frequently used for shielding applications.
This is a more expensive material, but suitable for specific applications.  

 

Components

Shielded Components are specialist manufacturers of custom sheet
metal components that can be used for a variety of applications. 

Electronic Industry: 

 

  • Shields 

  • Spring Clips 

  • Battery Contacts 

  • Terminals 

  • Mounting tabs/brackets 

  • Shielding Cages 

  • Heatsinks 

  • Grounding/Shielding plates 

  • Other complex metal parts

  • Brackets

  • General machining and sheet metal parts

  • Custom Washers

  • Clamps

  • Hooks and Hangers

  • Spouting / Gutter Brackets

  • Aluminium Extrusion Profiles / Heatsink Prototypes

  • EDM Wirecutting of complex metal parts / profiles

  • Turret press tooling etc

Materials
 

Our experience in toolmaking, press tool design and metal stamping, allows us to also manufacture all types of general sheet metal componentry. We work with a large range of materials including: 
 

  • Tinplated Steel

  • Electrogalvanised Steel

  • Cold Rolled Mild Steel

  • Hot Rolled Mild Steel

  • EQ Steel 

  • Galvanised Steel

  • Stainless Steel

  • Aluminium

  • Phosphor Bronze

  • Nickel Silver

  • Brass 

  • Copper

Finishes
 

Products can be supplied in a variety of finishes: 
 

  • Natural

  • Electroplated - Tin, Zinc, Nickel, Gold

  • Electroless Nickel

  • Powdercoating

RoHS Information
 

What is RoHS?
 

The RoHS Directive stands for "the restriction of the use of certain hazardous substances in electrical and electronic equipment". 
This Directive bans the placing on the EU market of new electrical and electronic equipment containing more than agreed levels of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB) and polybrominated diphenyl ether (PBDE) flame retardants. 

Shielded Components ensures all raw materials, processing and finishing operations are compliant with this directive.

ToolMaking Services LTD.

Ph. 03 3792 068