EN3645 Circular Connectors

EN3645 is an Airbus specification that features one of the most reliable, versatile, and rugged circular connectors available on the market today. The EN3645 family of connectors is designed to meet the MIL-DTL-38999 design specification it was derived from. These connectors were first developed for the most demanding applications and severe environmental conditions. EN3645 can be configured for a wide range of different applications across multiple industries such as fiber optics, fail safes, filters, hermetics, PC tails, and much more.

Some of the features and capabilities of EN3645 connectors are:

• Hermetically sealed options
• Quick self-lock coupling eliminates the need for lockwire
• Superior EMI shielding and Electrostatic Discharge Protection (EDP)
• Excellent resistance to vibration, moisture, shock, and corrosion
• Temperature range -65°C to 125°C (-85°F to 257°F)
• Wide variety of insert options and accessories
• Uses standard MIL-DTL-38999 contacts, assembly tools, and insert arrangements
• Recessed pins provide added contact protection

Note: The EN3645 Airbus specification is interchangeable with MIL-DTL-38999 Series III connectors.

For more information on which EN3645 connector is appropriate for your application, call A.E. Petsche at 844-237-7600 to speak with one of our qualified experts.

EN3645 Product Specifications

These connectors are in full compliance with the EN3645 European standards. For more details, please consult the EN3645 specification located here.

PIN Diagram

EN3645	W/Socket	6	G	N	35	B	N
Basic series	Plating (W = olive drab cadmium, F = nickel)	Shell style (Table 1)	Shell size (Table 2)	Grounding (N = standard insert not grounded)	Contact layout (Table 3)	Contact type (Table 4)	Orientation (Table 5)

Table 1: Shell Style

Designator	Shell Style
0	Square flange receptacle
6	Plug
7	Jam nut receptacle

Table 2: Shell Size

A = 09

B = 11

C = 13

D = 15

E = 17

F = 19

G = 21

H = 23

J = 25

Table 3: Contact Layout

Layout number	Contacts
	Total Number	22D	20	16	12	10	8
9-35	6	6
9-98	3		3
11-02	2			2
11-05	5		5
11-35	13	13
11-98	6		6
11-99	7		7
13-04	4			4
13-08	8		8
13-26	8	6			2
13-35	22	22
13-98	10		10
15-05	5			5
15-15	15		14	1
15-18	18		18
15-19	19		19
15-35	37	37
15-97	12		8	4
17-02	39	38					1 Triax
17-06	6				6
17-08	8			8
17-26	26		26
17-35	55	55
17-99	23		21	2
19-11	11			11
19-32	32		32
19-35	66	66
19-53	53	53
21-11	11				11
21-16	16			16
21-20	20		18				2 Qdx
21-35	79	79
21-39	39		37	2
21-41	41		41
21-75	4						4 TRiax
23-21	21			21
23-35	100	100
23-53	53		53
23-54	53	40		9	4
23-55	55		55
25-04	56		48	8
25-07	99	97					2 Triax
25-08	8						8 Triax
25-11	11		2			9
25-19	19				19
25-20	30		10	13	4		3 Triax
25-24	24			12	12
25-29	29			29
25-35	128	128
25-37	37			37
25-43	43		23	20
25-46	46		40	4			2 Coax
25-61	61		61

Table 4: Contact Type

Designator	Contact Type
A	Connector supplied less pin contact
B	Connector supplied less socket contact
F	Socket
M	Pin

Table 5: Orientations (see page 73 of http://www.ttieurope.com/object/Souriau-38999-Series-III-8D-Series.html for detailed diagrams)

Shell Size	Angles	N	A	B	C	D	E
9(A)	A°	105	108	80	35	64	91
	B°	140	132	118	140	155	131
	C°	215	248	230	205	234	197
	D°	265	320	312	275	304	240
11(B), 13(C) & 15(D)	A°	95	113	90	53	119	51
	B°	141	156	145	156	146	141
	C°	208	182	195	220	176	184
	D°	236	292	252	255	298	242
17(E), 19(F), 21(G), 23 (H) & 25 (J)	A°	80	135	29	66	62	79
	B°	142	170	169	140	145	153
	C°	196	200	200	200	180	197
	D°	293	310	244	244	280	272