Power Transistor Outline (TO) Packages

TO headers are intended for high reliability miniature microcircuit applications. The single piece construction provides great strength and resistance to stress. The absence of sidewalls help to facilitate circuit installation, as well as inspection and test accessibility.

Chelsea Technology TO Packages offer:

  • Wide range of sizes
  • Available with weld projections as well as solder seal

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Chelsea P/N Lead Count Part Type Manufacturer Drawing Cavity (L) Cavity (W) Pkg OD (L) Pkg OD (W) Suggested Lid Comments Quantity PDF
H25701 3 TO-257 SEAL-1295 0.340 0.290 0.420 0.420 LNS410S Double Wall, Full Au Plate 0 Download
H25703 3 TO-257 SEAL-1369-SP 0.330 0.330 0.420 0.420 LNS410S Nickel Plate 0 Download
H25705 3 TO-257 SEAL-1369-SP 0.330 0.330 0.420 0.420 LNS410S Full Au Plate 0 Download
H25706 3 TO-257 SEAL-1288-1 0.330 0.330 0.420 0.420 LNS410S Pin 2 Ground, Full Au Plate 0 Download
H25710 3 TO-257 SEAL-1369-SP 0.330 0.330 0.420 0.420 LNS410S .720″ Lead Length, Full Au Plate 0 Download
S259BEON     BEO Substrate for TO-257     0.259 0.259   Nickel Plate with Pattern 0 Download

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