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Pentair Introduces New High Thermal Performance Retainer Series and Newly Expanded High Clamp Force Family of Card Loks

Pentair has released a new Schroff retainer design-the Calmark High Thermal “HT” Card Lok and the newly expanded family of Calmark Series 263HC, 265HC, and 276HC High Clamp Force Card Lok Retainers.

The 280HT Card Lok provides best-in-class thermal performance by up to 15 percent over similarly sized Card Loks.  The 280HT can do this by shortening the thermal path distance from the PCB to the cold wall through a unique design.

Unlike the traditional Card Lok, the 280HT Card Lok features solid brackets along the length of the Card Lok that provide a continuous and uniform surface along the printed circuit board, or heat frame, and the cold wall.  The internal geometry maximizes surface contact area while minimizing heat path distance from the board to the cold wall.  You can view data sheet, performance data, and CAD files here.

The newly designed 263HC, 265HC, and 276HC High Clamp Force Card Lok Retainers provide an average of three times the clamping force of similarly sized Card Loks, meeting the growing demands of shock and vibration environments.  Its small and lightweight design provides industry-leading board retention that is ideal for defense, space and aerospace applications.  

bisco industries – Authorized Pentair Distributor

bisco is your local authorized distributor for Calmark card loks.  We also offer card guides and enclosure housings for your electronic system. Visit us online to spec in your part!

Product Spotlight: Schroff 42 Series Wedge Loks

Introducing Heavy Duty PCB Retainers

Schroff (formerly Birtcher) is the global leader in the design and manufacturing of heavy duty PCB retainers and card guides. One of Schroff / Birtcher’s most popular PCB retainers is the 42 Series Wedge Lok. The 42 Series Wedge Lok is designed to secure PBCs in rugged and high vibration environments. 42 Series PCB retainers also offer a lightweight design making them ideal for military, defense, and aerospace applications.

42 Series Wedge Lok Key Features

  • Designed for cold wall applications
  • Aids thermal transfer from the PCB to the cold wall
  • Screw actuated
  • 3 segment, non-shafted design
  • Average clamp force (5″, black anodized) = 269 lbs
  • Max expansion 6.98 mm (.275 in)
  • Flexible mounting options
  • Available with gold chem film, clear chem film, black anodized, hard black anodized, or electroless nickel plating
  • DSCC 84103 / DSCC CID 59590

Installing 42 Series Wedge Loks

42 Series Wedge Loks are designed for installation in cold wall applications. During installation Wedge Loks are first attached to the top and bottom of the PCB. Once the PCB is secured between the Wedge Loks it is inserted into cold wall channels in the card cage. Finally the Wedge Lok is actuated clamping the PCB to the cold wall.      

Configuring 42 Series Wedge Loks

Schroff / Birtcher 42 Series Wedge Loks are highly customizable helping them meet diverse and challenging application requirements. To configure a 42 Series PCB retainer for your application view the 42 Series spec sheet.

Your Authorized Source for Schroff 42 Series Wedge Loks

bisco industries is your authorized Schroff / Birtcher distributor stocking hundreds of 42 Series PCB retainers. bisco’s long standing partnership with Schroff and it’s parent company Pentair means you’ll receive expert service, competitive pricing, and expedited lead times. Visit biscoind.com to find pricing and stock or to request pricing on non-standard items.

Popular 42 Series Wedge Loks

What is a PCB Card Guide?

Printed circuit board (PCB) card guides, also called PCB retainers, are short narrow strips of material formed into shallow tapered troughs. PC boards are inserted into the top of the trough while the bottom is secured to an enclosure wall. Most card guides secure the PCB in place through the use of pressure but some card guides utilize levers or screws to lock the PCB in place. Card guides are fabricated from a variety of materials including nylon, aluminum, beryllium copper, and stainless steel. By securing circuit boards in place, card guides prevent damage to PCBs caused by vibration and movement.

The Top Names in Card Guides

For many years Pentair, under their Schroff, Birtcher, and Calmark brands, has been the leading manufacturer of PCB card guides. In fact, many of their branded products such as Wedge Tainers, Lok Tainers, PCB Tainers, and Card Loks have become synonymous with PCB card guides.  Other top card guide manufacturers include Bivar, Essentra (formerly Richco), and Keystone Electronics.

Learn More About PCB Card Guides

Check out these helpful catalogs from Calmark, Birtcher, and Keystone to learn more about PCB card guides.  As always, bisco representatives are standing by to assist you in configuring products, locating crosses, and finding price and availability information.

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