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PennEngineering
All Categories > PEM® Brand Fasteners for Metal Sheets and Panels > Fasteners for Mounting into Printed Circuit Boards > Nuts and Spacers/Standoffs, Surface Mount – Types SMTSO, SMTSOB, SMTSS™, SMTSK™, SMTBSO™ > SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Metric > Part # SMTSSS-4MM-10 ET  
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Part # SMTSSS-4MM-10 ET, SMTSS™ REELFAST® Surface Mount SNAP-TOP® Standoffs - Metric


PEM® surface mounted standoffs that eliminate the need for attaching screws

  • PEM® SMTSS™ fasteners feature a spring action to hold a P.C. Board securely without screw or threaded hardware, allowing for quick assembly.
  • Mount on P.C. Boards in the same manner and at the same time as other surface mount components prior to the automated reflow solder process.
  • Alleviated concerns about potential damage to P.C. Boards due to improper secondary installation operations.
  • Fasteners provided on tape and reel compatible with existing SMT automated installation equipment.
  • Benefits include reduced scrap, reduced handling and reduced risk of board damage.
    •




     Specifications   

    L - Length ± 0.13

     View
    10 mm

    Min. Sheet Thickness
    		1.53 mm

    A Max.
    		1.53 mm

    C Max.
    		4.09 mm

    E ± 0.13
    		6.35 mm

    B ± 0.13
    		4.80 mm

    P ± 0.13
    		3.58 mm

    øH - Hole Size in Sheet +0.08
    		4.22 mm

    øD - Min. Solder Pad
    		7 mm

    Parts per Reel1
    		200

    Fastener Material
    		Carbon Steel

    Standard Finish2
    		Electro-Plated Tin, ASTM B 545, Class A with Clear Preservative Coating, annealed

    Top Mounting Hole A +0.08
    4 mm

    Bottom Mounting Hole B +0.08
    		4.22 mm

    Min. Thickness - Panel 1 (Bottom)
    		1.53 mm

    Thickness Range - Panel 2 (Top)
    		1 to 1.8 mm

    Material - Panel 1 (Bottom)
    		PC Board

    Material - Panel 2 (Top)
    		PC Board or Metal

    Edge Distance C Min.
    		2.54 mm

    Location Tolerance
    		±0.13 mm

    Max. Hardness - Panel 1 (Bottom)
    		No Limit

    Max. Hardness - Panel 2 (Top)
    		No Limit

    CAD Supplier
    		PennEngineering® (PEM®)
    1 Packaged on 330mm recyclable reels. Tape width is 24 mm. Supplied with polyimide patch for vacuum pick up. Reels conform to EIA-481.
    2 (1) See PEM Technical Support section of our web site for related plating standards and specifications. (2) Optimal solderability life noted on packaging.



     DOWNLOADS 

    PEM Bulletin SMTSS