Connectors – Mouser Canada

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Backshells

Amphenol PCD Backshells offer strain relief, environmental protection, and 360° EMI/RFI shielding at the termination area of virtually any circular connector. These connectors feature a base material constructed of aluminum alloy, stainless steel, brass, or composite and a variety of finishes such as black zinc nickel, cadmium, electroless nickel, anodized black, passivated, and more. Amphenol PCD Backshells have custom designs available and meet or exceed RoHS/REACH compliance standards. Available in both military specifications and commercial types for any application, these backshells meet the Society of Automotive Engineers (SAE) AS85049 standard.

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RoHS Compliant

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Part #

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1815W05A
Amphenol PCD
1: $135.26
14In Stock
25Expected 2026-04-30

Mfr. Part #
M85049/1815W05A

Mouser Part #
523-85049/1815W05A

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

14In Stock

25Expected 2026-04-30

$135.26

$104.61

$100.77

$96.67

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

M85049/1817W03A
Amphenol PCD
1: $131.46
3In Stock

Mfr. Part #
M85049/1817W03A

Mouser Part #
523-85049/1817W03A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

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Datasheet

3In Stock

$131.46

$119.52

$105.68

$92.21

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

M85049/1817W04
Amphenol PCD
1: $97.26
23In Stock
100Expected 2026-05-12

Mfr. Part #
M85049/1817W04

Mouser Part #
523-85049/1817W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

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Datasheet

23In Stock

100Expected 2026-05-12

$97.26

$88.49

$82.83

$82.72

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

M85049/1817W04A
Amphenol PCD
1: $135.94
10In Stock

Mfr. Part #
M85049/1817W04A

Mouser Part #
523-85049/1817W04A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

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Datasheet

10In Stock

$135.94

$123.14

$109.25

$99.84

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

M85049/1817W06A
Amphenol PCD
1: $126.45
13In Stock

Mfr. Part #
M85049/1817W06A

Mouser Part #
523-85049/1817W06A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 17

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Datasheet

13In Stock

$126.45

$117.41

$115.68

$101.37

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

M85049/1819W03
Amphenol PCD
1: $105.15
20In Stock

Mfr. Part #
M85049/1819W03

Mouser Part #
523-85049/1819W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

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Datasheet

20In Stock

$105.15

$93.25

$89.15

$84.90

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

M85049/1819W04
Amphenol PCD
1: $139.21
7In Stock
25Expected 2026-04-17

Mfr. Part #
M85049/1819W04

Mouser Part #
523-85049/1819W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

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Datasheet

7In Stock

25Expected 2026-04-17

$139.21

$111.41

$105.22

$93.79

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

M85049/1819W06A
Amphenol PCD
1: $116.64
7In Stock

Mfr. Part #
M85049/1819W06A

Mouser Part #
523-85049/1819W06A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 19

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Datasheet

7In Stock

$116.64

$108.34

$95.28

$91.06

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

M85049/1821W04
Amphenol PCD
1: $117.53
16In Stock
25Expected 2026-03-04

Mfr. Part #
M85049/1821W04

Mouser Part #
523-85049/1821W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

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Datasheet

16In Stock

25Expected 2026-03-04

$117.53

$99.91

$93.65

$89.18

$84.93

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

M85049/1821W07A
Amphenol PCD
1: $126.62
10In Stock

Mfr. Part #
M85049/1821W07A

Mouser Part #
523-85049/1821W07A

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

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Datasheet

10In Stock

$126.62

$113.90

$112.82

$111.00

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

M85049/1821W08B
Amphenol PCD
1: $131.73
6In Stock
25Expected 2026-05-18

Mfr. Part #
M85049/1821W08B

Mouser Part #
523-85049/1821W08B

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 21

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Datasheet

6In Stock

25Expected 2026-05-18

$131.73

$118.50

$113.94

$110.14

$104.06

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 23

M85049/1823W06
Amphenol PCD
1: $175.22
20In Stock
25Expected 2026-03-04

Mfr. Part #
M85049/1823W06

Mouser Part #
523-85049/1823W06

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 23

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Datasheet

20In Stock

25Expected 2026-03-04

$175.22

$162.13

$108.46

$101.45

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 23

M85049/1823W09
Amphenol PCD
1: $136.77
1In Stock
11Expected 2026-03-23

Mfr. Part #
M85049/1823W09

Mouser Part #
523-85049/1823W09

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 23

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Datasheet

1In Stock

11Expected 2026-03-23

$136.77

$124.73

$119.91

$115.37

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 25

M85049/1825W04
Amphenol PCD
1: $152.38
13In Stock
25Expected 2026-04-06

Mfr. Part #
M85049/1825W04

Mouser Part #
523-85049/1825W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL ENV EMI/ RFI ST OD CAD SZ 25

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Datasheet

13In Stock

25Expected 2026-04-06

$152.38

$139.24

$122.82

$111.06

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1825W09A
Amphenol PCD
1: $170.65
11In Stock

Mfr. Part #
M85049/1825W09A

Mouser Part #
523-85049/1825W09A

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

11In Stock

$170.65

$156.89

$129.80

$117.27

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 13

M85049/1913W02
Amphenol PCD
1: $105.62
16In Stock

Mfr. Part #
M85049/1913W02

Mouser Part #
523-85049/1913W02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 13

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Datasheet

16In Stock

$105.62

$94.43

$84.98

$78.39

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 13

M85049/1913W03
Amphenol PCD
1: $79.24
2In Stock
25On Order

Mfr. Part #
M85049/1913W03

Mouser Part #
523-85049/1913W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 13

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Datasheet

2In Stock

25On Order

$79.24

$76.09

$70.52

$66.47

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 15

M85049/1915W03
Amphenol PCD
1: $90.20
20In Stock

Mfr. Part #
M85049/1915W03

Mouser Part #
523-85049/1915W03

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 15

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Datasheet

20In Stock

$90.20

$89.46

$82.14

$76.27

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 15

M85049/1915W04
Amphenol PCD
1: $97.43
13In Stock
25Expected 2026-03-16

Mfr. Part #
M85049/1915W04

Mouser Part #
523-85049/1915W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 15

Learn More

Datasheet

13In Stock

25Expected 2026-03-16

$97.43

$85.61

$80.25

$76.41

$72.77

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 17

M85049/1917W02
Amphenol PCD
1: $93.44
4In Stock

Mfr. Part #
M85049/1917W02

Mouser Part #
523-85049/1917W02

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 17

Learn More

Datasheet

4In Stock

$93.44

$88.46

$88.45

$81.52

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 17

M85049/1917W04
Amphenol PCD
1: $125.04
1In Stock
50On Order

Mfr. Part #
M85049/1917W04

Mouser Part #
523-85049/1917W04

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 17

Learn More

Datasheet

1In Stock

50On Order

$125.04

$115.71

$97.27

$84.18

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1919W04
Amphenol PCD
1: $104.30
15In Stock

Mfr. Part #
M85049/1919W04

Mouser Part #
523-85049/1919W04

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

Learn More

Datasheet

15In Stock

$104.30

$92.36

$92.35

$90.99

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 19

M85049/1919W06
Amphenol PCD
1: $108.48
18In Stock

Mfr. Part #
M85049/1919W06

Mouser Part #
523-85049/1919W06

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 19

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Datasheet

18In Stock

$108.48

$95.38

$85.39

Quote

Min.: 1
Mult.: 1

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

M85049/1919W07
Amphenol PCD
1: $127.80
7In Stock
25Expected 2026-03-09

Mfr. Part #
M85049/1919W07

Mouser Part #
523-85049/1919W07

Amphenol PCD

Circular MIL Spec Backshells 19 Backshell Non Env-EMI/RFI

Learn More

Datasheet

7In Stock

25Expected 2026-03-09

$127.80

$114.39

$97.21

$85.87

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 21

M85049/1921W05
Amphenol PCD
1: $109.03
5In Stock
25Expected 2026-03-09

Mfr. Part #
M85049/1921W05

Mouser Part #
523-85049/1921W05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST CAD SZ 21

Learn More

Datasheet

5In Stock

25Expected 2026-03-09

$109.03

$102.42

$102.40

$101.94

View

Min.: 1
Mult.: 1

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