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

M85049/1819N05
Amphenol PCD
1: $107.79
37In Stock
50Expected 2026-03-11

Mfr. Part #
M85049/1819N05

Mouser Part #
523-85049/1819N05

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

37In Stock

50Expected 2026-03-11

$107.79

$102.25

$89.93

$85.13

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

M85049/1821N05
Amphenol PCD
1: $103.96
67In Stock

Mfr. Part #
M85049/1821N05

Mouser Part #
523-85049/1821N05

Amphenol PCD

Circular MIL Spec Backshells 18 Backshell Env-EMI/RFI

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Datasheet

67In Stock

$103.96

$92.44

$85.59

$82.48

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Min.: 1
Mult.: 1

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

M85049/1821N07
Amphenol PCD
1: $97.42
33In Stock

Mfr. Part #
M85049/1821N07

Mouser Part #
523-85049/1821N07

Amphenol PCD

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

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Datasheet

33In Stock

$97.42

$96.43

$90.71

$88.07

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Min.: 1
Mult.: 1

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

M85049/1823N04
Amphenol PCD
1: $131.69
32In Stock

Mfr. Part #
M85049/1823N04

Mouser Part #
523-85049/1823N04

Amphenol PCD

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

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Datasheet

32In Stock

$131.69

$119.47

$106.47

$96.91

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Min.: 1
Mult.: 1

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

M85049/1823N05
Amphenol PCD
1: $92.74
39In Stock

Mfr. Part #
M85049/1823N05

Mouser Part #
523-85049/1823N05

Amphenol PCD

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

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Datasheet

39In Stock

$92.74

$92.04

$86.89

$74.15

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Min.: 1
Mult.: 1

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

M85049/1823N09
Amphenol PCD
1: $144.63
29In Stock

Mfr. Part #
M85049/1823N09

Mouser Part #
523-85049/1823N09

Amphenol PCD

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

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Datasheet

29In Stock

$144.63

$133.75

$105.79

$99.01

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Min.: 1
Mult.: 1

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

M85049/1825N04
Amphenol PCD
1: $119.88
42In Stock

Mfr. Part #
M85049/1825N04

Mouser Part #
523-85049/1825N04

Amphenol PCD

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

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Datasheet

42In Stock

$119.88

$106.67

$97.11

$91.88

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Min.: 1
Mult.: 1

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

M85049/1825N05
Amphenol PCD
1: $121.24
51In Stock
50Expected 2026-05-15

Mfr. Part #
M85049/1825N05

Mouser Part #
523-85049/1825N05

Amphenol PCD

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

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Datasheet

51In Stock

50Expected 2026-05-15

$121.24

$104.75

$96.49

$93.29

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Min.: 1
Mult.: 1

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

M85049/1825N06
Amphenol PCD
1: $116.39
50In Stock

Mfr. Part #
M85049/1825N06

Mouser Part #
523-85049/1825N06

Amphenol PCD

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

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Datasheet

50In Stock

$116.39

$105.59

$97.85

$87.25

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Min.: 1
Mult.: 1

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

M85049/1825N07
Amphenol PCD
1: $103.43
80In Stock

Mfr. Part #
M85049/1825N07

Mouser Part #
523-85049/1825N07

Amphenol PCD

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

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Datasheet

80In Stock

$103.43

$98.12

$93.84

$93.53

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Min.: 1
Mult.: 1

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

M85049/1825N07B
Amphenol PCD
1: $133.92
23In Stock

Mfr. Part #
M85049/1825N07B

Mouser Part #
523-85049/1825N07B

Amphenol PCD

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

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Datasheet

23In Stock

$133.92

$120.47

$115.83

$111.96

$105.77

Min.: 1
Mult.: 1

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

M85049/1825N08
Amphenol PCD
1: $131.29
69In Stock
50Expected 2026-05-18

Mfr. Part #
M85049/1825N08

Mouser Part #
523-85049/1825N08

Amphenol PCD

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

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Datasheet

69In Stock

50Expected 2026-05-18

$131.29

$120.62

$109.72

$109.69

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Min.: 1
Mult.: 1

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

M85049/1825N10
Amphenol PCD
1: $129.70
26In Stock

Mfr. Part #
M85049/1825N10

Mouser Part #
523-85049/1825N10

Amphenol PCD

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

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Datasheet

26In Stock

$129.70

$120.68

$105.59

$105.40

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Min.: 1
Mult.: 1

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

M85049/1913N02
Amphenol PCD
1: $96.35
83In Stock

Mfr. Part #
M85049/1913N02

Mouser Part #
523-85049/1913N02

Amphenol PCD

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

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Datasheet

83In Stock

$96.35

$86.63

$71.22

$69.87

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Min.: 1
Mult.: 1

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

M85049/1913N04
Amphenol PCD
1: $90.69
56In Stock
50Expected 2026-04-23

Mfr. Part #
M85049/1913N04

Mouser Part #
523-85049/1913N04

Amphenol PCD

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

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Datasheet

56In Stock

50Expected 2026-04-23

$90.69

$83.34

$71.58

$65.39

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Min.: 1
Mult.: 1

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

M85049/1917N05
Amphenol PCD
1: $129.70
47In Stock
50Expected 2026-03-16

Mfr. Part #
M85049/1917N05

Mouser Part #
523-85049/1917N05

Amphenol PCD

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

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Datasheet

47In Stock

50Expected 2026-03-16

$129.70

$120.08

$100.89

$79.45

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Min.: 1
Mult.: 1

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

M85049/1919N04
Amphenol PCD
1: $95.99
30In Stock

Mfr. Part #
M85049/1919N04

Mouser Part #
523-85049/1919N04

Amphenol PCD

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

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Datasheet

30In Stock

$95.99

$81.59

$76.48

$72.83

$69.36

Min.: 1
Mult.: 1

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

M85049/1919N07
Amphenol PCD
1: $101.60
63In Stock
100Expected 2026-03-09

Mfr. Part #
M85049/1919N07

Mouser Part #
523-85049/1919N07

Amphenol PCD

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

Learn More

Datasheet

63In Stock

100Expected 2026-03-09

$101.60

$93.96

$79.86

$76.73

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Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 23

M85049/1923N07
Amphenol PCD
1: $112.07
43In Stock

Mfr. Part #
M85049/1923N07

Mouser Part #
523-85049/1923N07

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 23

Learn More

Datasheet

43In Stock

$112.07

$104.33

$91.40

$87.48

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 23

M85049/1923N08
Amphenol PCD
1: $113.88
26In Stock

Mfr. Part #
M85049/1923N08

Mouser Part #
523-85049/1923N08

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 23

Learn More

Datasheet

26In Stock

$113.88

$96.81

$96.80

$86.35

View

Min.: 1
Mult.: 1

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

M85049/1925N04
Amphenol PCD
1: $108.72
25In Stock
25Expected 2026-03-10

Mfr. Part #
M85049/1925N04

Mouser Part #
523-85049/1925N04

Amphenol PCD

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

Learn More

Datasheet

25In Stock

25Expected 2026-03-10

$108.72

$92.40

$89.87

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

M85049/1925N05
Amphenol PCD
1: $89.76
45In Stock

Mfr. Part #
M85049/1925N05

Mouser Part #
523-85049/1925N05

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

Learn More

Datasheet

45In Stock

$89.76

$86.51

$83.13

$79.52

View

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

M85049/1925N08
Amphenol PCD
1: $120.47
29In Stock

Mfr. Part #
M85049/1925N08

Mouser Part #
523-85049/1925N08

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

Learn More

Datasheet

29In Stock

$120.47

$107.07

$102.95

$99.53

$94.02

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

M85049/1925N10
Amphenol PCD
1: $120.93
49In Stock
50Expected 2026-04-28

Mfr. Part #
M85049/1925N10

Mouser Part #
523-85049/1925N10

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NIC SZ 25

Learn More

Datasheet

49In Stock

50Expected 2026-04-28

$120.93

$105.40

$95.06

$93.26

$89.59

Min.: 1
Mult.: 1

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NICKEL

M85049/25-29N
Amphenol PCD
1: $160.49
24In Stock

Mfr. Part #
M85049/25-29N

Mouser Part #
523-85049/25-29N

Amphenol PCD

Circular MIL Spec Backshells BACKSHELL NON ENV EMI/RFI ST NICKEL

Learn More

Datasheet

24In Stock

$160.49

$146.35

$140.71

$136.01

$128.51

Min.: 1
Mult.: 1

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