TO-5

Operational amplifier in a TO-5 package, viewed from above.

Gear-shaped heat sinks for TO-5 packages

In electronics, TO-5 is a designation for a standardized metal semiconductor package used for transistors and some integrated circuits. The TO element stands for "transistor outline" and refers to a series of technical drawings produced by JEDEC.^[1]

The typical TO-5 package has a base diameter of 8.9 mm (0.35 in), a cap diameter of 8.1 mm (0.32 in), and a cap height of 6.3 mm (0.25 in).^[2]

There are multiple variants that differ from the regular 3-pin configuration. The H06C variant with 6 pins has its marker between pin 1 and 6, and H08A has 8 pins with the marker on the last one. The counting order is clockwise from the bottom perspective. ^[3]

References

↑ TO-5 outlines at JEDEC, retrieved 14 December 2013
↑ TO-5 package at siliconfareast, retrieved 14 December 2013
↑ Metal Can Packages at ronja.twibright.com/datasheets/, retrieved 30 December 2013

External links

TO-5 images

Semiconductor packages

Diode	DO-204 (DO-35 / DO-41) DO-213 (MELF) DO-214 (SMA / SMB / SMC) SOD (SOD-123 / SOD-323 / SOD-523 / SOD-923)

Transistor	SOT / TSOT TO-3 TO-5 TO-18 TO-66 TO-92 TO-126 TO-220 TO-253 (DPAK) TO-263 (D2PAK)

Single row	SIP / SIL

Dual row	DFN DIP / DIL Flat Pack SO / SOIC SOP / SSOP TSOP / TSSOP ZIP

Quad row	LCC PLCC QFN QFP QUIP / QUIL

Grid array	BGA eWLB LGA PGA

Wafer	COB COF COG CSP Flip Chip PoP QP UICC WL-CSP / WLP

Related topics	Electronic packaging Integrated circuit packaging List of integrated circuit package dimensions List of integrated circuit packaging types Printed circuit board Surface-mount technology Through-hole technology

Note: It's relatively common to find packages that contain other components than their designated ones, such as diodes or voltage regulators in transistor packages, etc.

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