Power Transistor Outline (TO) Packages | Spectrum Semiconductor Materials

Common uses for these packages include high-power and high voltage devices, MOSFETs, high-power diodes, power rectifiers and IGBT devices to name just a few. These packages have excellent thermal properties from Cu/W heat sinks that can include BeO and ALN inserts; isolating the case if needed. Packages meet Military and Space specifications.

There are a number of common open tooled designs such as TO254, TO257 and TO258. These are often available with little or no lead time. Package frames are typically Kovar or CRS 1010 with bases constructed of OFHC copper or Cu/W (80/20). Common pin materials include copper cored Alloy 52 or Cu/Zr with a variety of finishes.

Advantages of Power Transistor Outline (TO) Packages:

Large variety of available outlines
Full Hermiticity 1x10^-8
Metal seal ring for seam sealing
Ceramic eyelets for higher reliability and performance (glass eyelets available upon request)
Brazed BeO or ALN for isolated case

All dimensions are in inches unless otherwise specified

SSM P/N	Lead Count	Part Type	Mfg Drw No	Cavity Size (W)	Cavity Size (L)	Pkg OD (L)	Pkg OD (W)	S/R OD (L)	S/R OD (W)	S/R ID (L)	S/R ID (W)	B/F Layout	Lead Config	Recom Lid	Comments	PDF	Req Quote
HDR06604	2	PWR PKG TO-66	N/A										NH		PWR PKG TO-66 OUTLINE		Req Quote
HDR25403	3	PWR PKG TO-254	SQHV540-250-3	0.44	0.44	0.54	0.54							SL-54001	PWR PKG TO-254 OUTLINE		Req Quote
HDR25404	3	PWR PKG TO-254	SD-570-A460 OPT P007	0.396	0.396	0.795	0.54	0.54	0.54	0.44	0.44	ALO			PWR PKG TO-254 OUTLINE	Download PDF for part number HDR25404	Req Quote
HDR25410	3	PWR PKG TO-254	150-01346-00 REV A	0.439	0.439	0.54	0.54	0.54	0.54	0.439	0.439	3+0		SL-54001	PWR PKG TO-254 OUTLINE - TABLESS	Download PDF for part number HDR25410	Req Quote
HDR25704	3	PWR PKG TO-257	BP1010	0.328	0.328	0.415	0.415	0.415	0.415	0.329	0.329	3+0	STRT POST	SL-41403	PWR PKG TO-257 OUTLINE	Download PDF for part number HDR25704	Req Quote