DO-204

"DO-29" redirects here. For the 1950s German tiltrotor aircraft, see Dornier Do 29. For the proposed German heavy fighter, see Dornier Do 29 (1934).

DO-204 is a family of diode semiconductor packages defined by JEDEC. This family comprises lead-mounted axial devices with round leads. Generally a diode will have a line painted near the cathode end.

1N4148 axial diodes, in the glass DO-35 package (also known as DO-204-AH or SOD27)

Dimensions

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.

Variants included in DO-204^[1]

Variant	Original standard[2]		Dimensions (mm)
			A			B			C			D			E
			min	max		min	max		min	max		min	max		min	max
AA	DO-7 [3]		25.40	38.10		5.85	7.62		0.46	0.55		2.16	2.71		—	1.27
AB	DO-14 [4]		25.40	38.10		5.85	7.62		0.46	0.55		2.75	3.55		—	1.27
AC	DO-15 [5]		25.40	38.10		5.85	7.62		0.69	0.88		2.65	3.55		—	1.27
AD	DO-16 [6]		11.43	19.05		1.27	2.54		0.23	0.33		—	1.27		—	1.27
AE	DO-26 [7]		35.56	38.10		8.75	10.41		0.69	0.99		5.59	6.60		—	2.03
AF	DO-29 [8]		25.40	38.10		8.00	9.14		0.74	0.83		3.05	3.81		—	1.27
AG	DO-34 [9]		25.40	38.10		2.16	3.04		0.46	0.55		1.27	1.90		—	1.27
AH	DO-35 [10]		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 [11]		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

Common variants

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

Several common packages are archived in DO-204 as variants, and may be referred to using their alternative names.

DO-7

The DO-7 (also known as DO-204-AA) is a common semiconductor package for 1N34A germanium diodes.^[3][12]

DO-35

The DO-35 (also known as DO-204-AH or SOD27) is a semiconductor package used to encapsulate signal diodes (i.e., diodes meant to handle small amounts of current and voltage).^[10][13][2] It is often used to package small signal, low power diodes such as 1N4148 (a 100 V, 300 mA silicon diode.)

DO-41

The DO-41 (also known as DO-204-AL or SOD66) is a common semiconductor package used to encapsulate rectifier diodes (i.e., diodes meant to handle larger currents and voltages than signal diodes).^[11][14] The name is derived from the JEDEC descriptor "Diode Outline, Case Style 41".^[2] 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 1N4001 to 1N4007 series of rectification diodes.

National standards

Standards organization	Standard	Designation for
		DO-7	DO-14	DO-15	DO-16	DO-29	DO-35	DO-41
JEDEC	JEP95	DO-204AA	DO-204AB	DO-204AC	DO-204AD	DO-204AF	DO-204AH	DO-204AL
IEC	IEC 60191[15][16]	A1A	A1C	A58	A70	A71	A24
DIN	DIN 41880[17][18]	51A2				—	54A2	54B2
	DIN 41883[18]	—				56A2	—	—
EIAJ / JEITA	ED-7500A[19]	SC-1A	—	SC-39	SC-54	SC-55	SC-40	—
British Standards	BS 3934[15]	SO-6	SO-8				SO-84
ASMW	TGL 200-8380[20]	B	—	D5	D6	—	K	—
	TGL 11811[16]	M3A	—	M3B	M3C	—	M2	—