Automotive Connectors – Mouser United Kingdom

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AT Protective Backshell Boots

Amphenol Sine Systems AT Series™ Boots provide an optional protective backshell covering for harsh environmental and industrial applications in a -28°C to +100°C temperature range. These 2- to 12-position boots are designed for use with AT, ATM, and ATP Series™ connectors that do not include an endcap or shrink boot strain relief. Amphenol Sine Systems A Series™ Boots are made of high-quality plastisol in three color options: yellow, black, and gray. Typical applications include heavy equipment, construction, transportation, off-road mining, industrial, railway, automotive, and more.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Accessory Type	Number of Positions	Gender	Color	Series	Packaging
Automotive Connectors Boot (Backshell) 3-way Plug, Yellow AT3S-BT-YW Amphenol SINE Systems 1: £1.10 121In Stock	Mfr. Part No. AT3S-BT-YW Mouser Part No 654-AT3S-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 3-way Plug, Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	121In Stock	£1.10 £0.969 £0.925 £0.863 View £0.69 £0.637 £0.601 £0.595 £0.593	Min.: 1 Mult.: 1	Accessories	Backshell	3 Position	Plug (Male)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 12-way Plug, Grey AT12S-BT Amphenol SINE Systems 1: £0.995 2,062In Stock	Mfr. Part No. AT12S-BT Mouser Part No 654-AT12S-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 12-way Plug, Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	2,062In Stock	£0.995 £0.882 £0.826 £0.74 View £0.718 £0.683 £0.641 £0.592 £0.585	Min.: 1 Mult.: 1	Accessories	Backshell	12 Position	Plug (Male)	Gray	AT	Bulk
Automotive Connectors Boot (Backshell) 12-way Plug, Black AT12S-BT-BK Amphenol SINE Systems 1: £0.871 2,948In Stock	Mfr. Part No. AT12S-BT-BK Mouser Part No 654-AT12S-BT-BK	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 12-way Plug, Black Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	2,948In Stock	£0.871 £0.773 £0.724 £0.59 View £0.56 £0.55 £0.505 £0.478 £0.474	Min.: 1 Mult.: 1	Accessories	Backshell	12 Position	Plug (Male)	Black	AT	Bulk
Automotive Connectors Boot (Backshell) 2-way Plug, Black AT2S-BT-BK Amphenol SINE Systems 1: £0.638 3,748In Stock	Mfr. Part No. AT2S-BT-BK Mouser Part No 654-AT2S-BT-BK	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 2-way Plug, Black Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	3,748In Stock	£0.638 £0.512 £0.478 £0.451 View £0.405 £0.388	Min.: 1 Mult.: 1	Accessories	Backshell	2 Position	Plug (Male)	Black	AT	Bulk
Automotive Connectors Boot (Backshell) 12way Receptacle Gry AT12P-BT Amphenol SINE Systems 1: £1.14 422In Stock 400On Order	Mfr. Part No. AT12P-BT Mouser Part No 654-AT12P-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 12way Receptacle Gry Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	422In Stock 400On Order	£1.14 £0.995 £0.882 £0.78 View £0.608 £0.556 £0.555	Min.: 1 Mult.: 1	Accessories	Backshell	12 Position	Receptacle (Female)	Gray		Bulk
Automotive Connectors Boot (Backshell) 12way Receptacle Blk AT12P-BT-BK Amphenol SINE Systems 1: £0.943 461In Stock 2,800On Order	Mfr. Part No. AT12P-BT-BK Mouser Part No 654-AT12P-BT-BK	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 12way Receptacle Blk Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	461In Stock 2,800On Order On Order Ship Dates Mfr. No: AT12P-BT-BK Stock: 461 Can Dispatch Immediately On Order: 1,200 Expected 10/12/2026 1,600 Expected 05/02/2027 Factory Lead Time: 18 Weeks	£0.943 £0.849 £0.711 £0.651 View £0.648 £0.566 £0.526	Min.: 1 Mult.: 1	Accessories	Backshell	12 Position	Receptacle (Female)	Black	AT	Bulk
Automotive Connectors Boot (Backshell) 12way Rcpt Yellow AT12P-BT-YW Amphenol SINE Systems 1: £0.871 46In Stock	Mfr. Part No. AT12P-BT-YW Mouser Part No 654-AT12P-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 12way Rcpt Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	46In Stock	£0.871 £0.811 £0.636 £0.581 View £0.577 £0.532 £0.504 £0.489	Min.: 1 Mult.: 1	Accessories	Backshell	12 Position	Receptacle (Female)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 12-way Plug, Yellow AT12S-BT-YW Amphenol SINE Systems 1: £1.05 145In Stock	Mfr. Part No. AT12S-BT-YW Mouser Part No 654-AT12S-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 12-way Plug, Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	145In Stock	£1.05 £0.89 £0.788 £0.719 View £0.684 £0.63 £0.582 £0.553 £0.54	Min.: 1 Mult.: 1	Accessories	Backshell	12 Position	Plug (Male)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 2way Receptacle Grey AT2P-BT Amphenol SINE Systems 1: £0.773 614In Stock 900Expected 01/12/2026	Mfr. Part No. AT2P-BT Mouser Part No 654-AT2P-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 2way Receptacle Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	614In Stock 900Expected 01/12/2026	£0.773 £0.695 £0.667 £0.624 View £0.567 £0.51 £0.434 £0.405 £0.40	Min.: 1 Mult.: 1	Accessories	Backshell	2 Position	Receptacle (Female)	Gray		Bulk
Automotive Connectors Boot (Backshell) 2way Rcpt Yellow AT2P-BT-YW Amphenol SINE Systems 1: £1.07 258In Stock	Mfr. Part No. AT2P-BT-YW Mouser Part No 654-AT2P-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 2way Rcpt Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	258In Stock	£1.07 £0.925 £0.826 £0.788 View £0.78 £0.663 £0.577 £0.548 £0.54	Min.: 1 Mult.: 1	Accessories	Backshell	2 Position	Receptacle (Female)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 2-way Plug, Grey AT2S-BT Amphenol SINE Systems 1: £0.943 635In Stock 2,700On Order	Mfr. Part No. AT2S-BT Mouser Part No 654-AT2S-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 2-way Plug, Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	635In Stock 2,700On Order On Order Ship Dates Mfr. No: AT2S-BT Stock: 635 Can Dispatch Immediately On Order: 1,500 Expected 13/11/2026 1,200 Expected 08/03/2027 Factory Lead Time: 18 Weeks	£0.943 £0.796 £0.718 £0.684 View £0.634 £0.615 £0.517 £0.489 £0.475	Min.: 1 Mult.: 1	Accessories	Backshell	2 Position	Plug (Male)	Gray		Bulk
Automotive Connectors Boot (Backshell) 2-way Plug, Yellow AT2S-BT-YW Amphenol SINE Systems 1: £1.15 78In Stock	Mfr. Part No. AT2S-BT-YW Mouser Part No 654-AT2S-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 2-way Plug, Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	78In Stock	£1.15 £0.986 £0.882 £0.841 View £0.773 £0.669 £0.595 £0.567	Min.: 1 Mult.: 1	Accessories	Backshell	2 Position	Plug (Male)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 3way Receptacle Grey AT3P-BT Amphenol SINE Systems 1: £0.773 1,430In Stock	Mfr. Part No. AT3P-BT Mouser Part No 654-AT3P-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 3way Receptacle Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	1,430In Stock	£0.773 £0.657 £0.588 £0.559 View £0.519 £0.517 £0.48	Min.: 1 Mult.: 1	Accessories	Backshell	3 Position	Receptacle (Female)	Gray		Bulk
Automotive Connectors Boot (Backshell) 3way Rcpt Yellow AT3P-BT-YW Amphenol SINE Systems 1: £1.10 63In Stock	Mfr. Part No. AT3P-BT-YW Mouser Part No 654-AT3P-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 3way Rcpt Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	63In Stock	£1.10 £0.952 £0.811 £0.773 View £0.72 £0.703 £0.578 £0.553 £0.538	Min.: 1 Mult.: 1	Accessories	Backshell	3 Position	Receptacle (Female)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 3-way Plug, Black AT3S-BT-BK Amphenol SINE Systems 1: £0.89 366In Stock 600Expected 10/12/2026	Mfr. Part No. AT3S-BT-BK Mouser Part No 654-AT3S-BT-BK	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 3-way Plug, Black Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	366In Stock 600Expected 10/12/2026	£0.89 £0.766 £0.68 £0.648 View £0.57 £0.53 £0.499 £0.498	Min.: 1 Mult.: 1	Accessories	Backshell	3 Position	Plug (Male)	Black		Bulk
Automotive Connectors Boot (Backshell) 4way Receptacle Grey AT4P-BT Amphenol SINE Systems 1: £0.751 237In Stock 600Expected 10/12/2026	Mfr. Part No. AT4P-BT Mouser Part No 654-AT4P-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 4way Receptacle Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	237In Stock 600Expected 10/12/2026	£0.751 £0.64 £0.571 £0.544 View £0.478 £0.457	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Receptacle (Female)	Gray		Bulk
Automotive Connectors Boot (Backshell) 4way Receptacle Blk AT4P-BT-BK Amphenol SINE Systems 1: £0.721 1,319In Stock 600On Order	Mfr. Part No. AT4P-BT-BK Mouser Part No 654-AT4P-BT-BK	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 4way Receptacle Blk Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	1,319In Stock 600On Order	£0.721 £0.619 £0.56 £0.533 View £0.493 £0.454 £0.414 £0.396	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Receptacle (Female)	Black		Bulk
Automotive Connectors Boot (Backshell) 4way Rcpt Yellow AT4P-BT-YW Amphenol SINE Systems 1: £0.751 56In Stock	Mfr. Part No. AT4P-BT-YW Mouser Part No 654-AT4P-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 4way Rcpt Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	56In Stock	£0.751 £0.64 £0.56 £0.536 View £0.501 £0.475 £0.419 £0.394 £0.388	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Receptacle (Female)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 4-way Plug, Grey AT4S-BT Amphenol SINE Systems 1: £1.10 785In Stock 600Expected 17/12/2026	Mfr. Part No. AT4S-BT Mouser Part No 654-AT4S-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 4-way Plug, Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	785In Stock 600Expected 17/12/2026	£1.10 £0.934 £0.871 £0.834 View £0.788 £0.745 £0.55 £0.523 £0.519	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Plug (Male)	Gray	AT	Bulk
Automotive Connectors Boot (Backshell) 4-way Plug, Yellow AT4S-BT-YW Amphenol SINE Systems 1: £1.14 156In Stock	Mfr. Part No. AT4S-BT-YW Mouser Part No 654-AT4S-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 4-way Plug, Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	156In Stock	£1.14 £0.969 £0.882 £0.841 View £0.759 £0.717 £0.638 £0.604 £0.591	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Plug (Male)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 6way Receptacle Blk AT6P-BT-BK Amphenol SINE Systems 1: £0.743 109In Stock 900On Order	Mfr. Part No. AT6P-BT-BK Mouser Part No 654-AT6P-BT-BK	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 6way Receptacle Blk Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	109In Stock 900On Order On Order Ship Dates Mfr. No: AT6P-BT-BK Stock: 109 Can Dispatch Immediately On Order: 300 Expected 23/11/2026 600 Expected 21/01/2027 Factory Lead Time: 14 Weeks	£0.743 £0.664 £0.635 £0.612 View £0.567 £0.538 £0.507 £0.504	Min.: 1 Mult.: 1	Accessories	Backshell	6 Position	Receptacle (Female)	Black	AT	Bulk
Automotive Connectors Boot (Backshell) 6way Rcpt Yellow AT6P-BT-YW Amphenol SINE Systems 1: £0.908 280In Stock	Mfr. Part No. AT6P-BT-YW Mouser Part No 654-AT6P-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 6way Rcpt Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	280In Stock	£0.908 £0.773 £0.684 £0.654 View £0.621 £0.572 £0.486 £0.463 £0.453	Min.: 1 Mult.: 1	Accessories	Backshell	6 Position	Receptacle (Female)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 6-way Plug, Grey AT6S-BT Amphenol SINE Systems 1: £0.925 280In Stock 600Expected 09/11/2026	Mfr. Part No. AT6S-BT Mouser Part No 654-AT6S-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 6-way Plug, Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	280In Stock 600Expected 09/11/2026	£0.925 £0.826 £0.78 £0.741 View £0.622 £0.536	Min.: 1 Mult.: 1	Accessories	Backshell	6 Position	Plug (Male)	Gray	AT	Bulk
Automotive Connectors Boot (Backshell) 6-way Plug, Yellow AT6S-BT-YW Amphenol SINE Systems 1: £1.07 230In Stock	Mfr. Part No. AT6S-BT-YW Mouser Part No 654-AT6S-BT-YW	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 6-way Plug, Yellow Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	230In Stock	£1.07 £0.908 £0.796 £0.759 View £0.705 £0.667 £0.588 £0.56 £0.548	Min.: 1 Mult.: 1	Accessories	Backshell	6 Position	Plug (Male)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 8way Receptacle Grey AT8P-BT Amphenol SINE Systems 1: £0.818 1,568In Stock	Mfr. Part No. AT8P-BT Mouser Part No 654-AT8P-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 8way Receptacle Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	1,568In Stock	£0.818 £0.718 £0.663 £0.646 View £0.606 £0.546 £0.493 £0.485	Min.: 1 Mult.: 1	Accessories	Backshell	8 Position	Receptacle (Female)	Gray	AT	Bulk

AT Protective Backshell Boots

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AT Protective Backshell Boots

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