DO-204

General form of the packages described by DO-204. Lead diameter is not controlled less than E from the body to allow for minor irregularities.

DO-204 is a family of semiconductor packages defined by JEDEC. This family comprises lead-mounted axial devices with round leads. Several common packages such as DO-41 are archived in DO-204 as variants.

Generally a diode will have a line painted near the cathode end.

Variants included in DO-204^[1]

Variant	Other standards[2]		Dimensions (mm)
			A			B			C			D			E
			min	max		min	max		min	max		min	max		min	max
AA	DO-7		25.40	38.10		5.85	7.65		0.46	0.55		2.16	2.71		—	1.27
AB	DO-14		25.40	38.10		5.85	7.62		0.46	0.55		2.75	3.55		—	1.27
AC	DO-15		25.40	38.10		5.85	7.62		0.69	0.88		2.65	3.55		—	1.27
AD	DO-16		11.43	19.05		1.27	2.54		0.23	0.33		—	1.27		—	1.27
AE	DO-26		35.56	38.10		8.75	10.41		0.69	0.99		5.59	6.60		—	2.03
AF	DO-29		25.40	38.10		8.00	9.14		0.74	0.83		3.05	3.81		—	1.27
AG	DO-34		25.40	38.10		2.16	3.04		0.46	0.55		1.27	1.90		—	1.27
AH	DO-35		25.40	38.10		3.05	5.08		0.46	0.55		1.53	2.28		—	1.27
AJ	—		11.43	13.97		5.85	7.62		0.49	0.53		2.16	2.66		—	1.27
AK	—		11.43	13.97		3.81	4.45		0.36	0.40		1.66	1.90		—	1.27
AL	DO-41		25.40	—		4.07	5.20		0.72	0.86		2.04	2.71		—	1.27
AM	—		17.53	38.10		3.18	5.20		0.64	0.91		1.27	2.79		—	1.27
AN	—		25.40	—		5.08	5.84		0.71	0.86		2.54	3.05		—	1.27
AP	—		25.40	38.10		3.18	4.57		0.74	0.89		2.54	3.81		—	1.27
AR	—		27.95	38.10		9.27	9.52		1.22	1.32		6.10	6.35		—	2.54

DO-35

1N4148 diodes, in the DO-35 package

The DO-35 is a semiconductor package type. ^[3] It is often used to package small signal, low power diodes such as 1N4148 (a 100V, 300mA silicon diode.)

DO-41

The DO-41 is a common package used to encapsulate rectifier diodes. The name is derived from the JEDEC descriptor "Diode Outline, Case Style 41".^[4] DO-41 diodes are larger than signal diode packages such as DO-35, which are not required to handle large currents.

The most common diode using this packaging is the 1N400X series of rectification diodes.

A drawing of a DO-41 diode package. The cathode is marked with a silver or white band.

References

1. ^ JEDEC Standard DO-204
2. ^ JEDEC. Master Index to Outlines/Standards
3. ^ http://www.fairchildsemi.com/products/discrete/packaging/pkg.html
4. ^ JEDEC. Master Index to Outlines/Standards