Automotive Connectors – Mouser Ireland

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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 (EUR) 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: €1.26 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	€1.26 €1.11 €1.06 €0.989 View €0.827 €0.739 €0.672 €0.669 €0.66	Min.: 1 Mult.: 1	Accessories	Backshell	3 Position	Plug (Male)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 4way Receptacle Blk AT4P-BT-BK Amphenol SINE Systems 1: €0.851 1,439In 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	1,439In Stock 600On Order	€0.851 €0.719 €0.642 €0.611 View €0.565 €0.538 €0.516 €0.456	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Receptacle (Female)	Black		Bulk
Automotive Connectors Boot (Backshell) 2-way Plug, Black AT2S-BT-BK Amphenol SINE Systems 1: €0.731 4,153In 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	4,153In Stock	€0.731 €0.611 €0.553 €0.535	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: €1.26 7In Stock 800On 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	7In Stock 800On Order On Order Ship Dates Mfr. No: AT12P-BT Stock: 7 Can Dispatch Immediately On Order: 400 Expected 15/10/2026 400 Expected 20/10/2026 Factory Lead Time: 18 Weeks	€1.26 €1.13 €1.08 €0.869 View €0.84 €0.802 €0.79	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: €1.10 579In Stock 1,200Expected 03/12/2026	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	579In Stock 1,200Expected 03/12/2026	€1.10 €0.989 €0.912 €0.824 View €0.783 €0.724 €0.649 €0.628 €0.621	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: €0.963 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	€0.963 €0.929 €0.728 €0.666 View €0.592 €0.567 €0.544	Min.: 1 Mult.: 1	Accessories	Backshell	12 Position	Receptacle (Female)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 12-way Plug, Grey AT12S-BT Amphenol SINE Systems 1: €1.11 959In Stock 1,200Expected 06/11/2026	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	959In Stock 1,200Expected 06/11/2026	€1.11 €0.998 €0.929 €0.789 View €0.788 €0.763 €0.698 €0.667 €0.659	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: €1.04 684In Stock 2,600On Order	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	684In Stock 2,600On Order On Order Ship Dates Mfr. No: AT12S-BT-BK Stock: 684 Can Dispatch Immediately On Order: 800 Expected 30/09/2026 1,800 Expected 06/11/2026 Factory Lead Time: 18 Weeks	€1.04 €0.937 €0.903 €0.73 View €0.716 €0.626 €0.593 €0.589	Min.: 1 Mult.: 1	Accessories	Backshell	12 Position	Plug (Male)	Black	AT	Bulk
Automotive Connectors Boot (Backshell) 12-way Plug, Yellow AT12S-BT-YW Amphenol SINE Systems 1: €1.20 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	€1.20 €1.02 €0.912 €0.824 View €0.783 €0.745 €0.676 €0.65 €0.636	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: €0.886 694In 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	694In Stock 900Expected 01/12/2026	€0.886 €0.753 €0.673 €0.64 View €0.584 €0.512 €0.479 €0.473	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: €1.24 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	€1.24 €1.06 €0.946 €0.903 View €0.894 €0.764 €0.673 €0.634 €0.624	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: €1.09 1,319In Stock 1,500Expected 13/11/2026	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	1,319In Stock 1,500Expected 13/11/2026	€1.09 €0.989 €0.963 €0.929 View €0.851 €0.705 €0.61	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: €1.32 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	€1.32 €1.13 €1.01 €0.963 View €0.886 €0.803 €0.704 €0.674 €0.664	Min.: 1 Mult.: 1	Accessories	Backshell	2 Position	Plug (Male)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 3way Receptacle Blk AT3P-BT-BK Amphenol SINE Systems 1: €1.25 10In Stock 1,500On Order	Mfr. Part No. AT3P-BT-BK Mouser Part No 654-AT3P-BT-BK	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 3way Receptacle Blk Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	10In Stock 1,500On Order On Order Ship Dates Mfr. No: AT3P-BT-BK Stock: 10 Can Dispatch Immediately On Order: 900 Expected 03/12/2026 600 Expected 24/12/2026 Factory Lead Time: 18 Weeks	€1.25 €1.04 €0.929 €0.886 View €0.814 €0.775 €0.738 €0.697	Min.: 1 Mult.: 1	Accessories	Backshell	3 Position	Receptacle (Female)	Black		Bulk
Automotive Connectors Boot (Backshell) 3way Rcpt Yellow AT3P-BT-YW Amphenol SINE Systems 1: €1.26 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	€1.26 €1.09 €0.92 €0.886 View €0.823 €0.805 €0.66 €0.631 €0.614	Min.: 1 Mult.: 1	Accessories	Backshell	3 Position	Receptacle (Female)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 3-way Plug, Grey AT3S-BT Amphenol SINE Systems 1: €1.13 5In Stock 1,500Expected 10/12/2026	Mfr. Part No. AT3S-BT Mouser Part No 654-AT3S-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 3-way Plug, Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	5In Stock 1,500Expected 10/12/2026	€1.13 €0.963 €0.857 €0.816 View €0.755 €0.718 €0.678 €0.642	Min.: 1 Mult.: 1	Accessories	Backshell	3 Position	Plug (Male)	Gray		Bulk
Automotive Connectors Boot (Backshell) 3-way Plug, Black AT3S-BT-BK Amphenol SINE Systems 1: €1.04 416In 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	416In Stock 600Expected 10/12/2026	€1.04 €0.886 €0.791 €0.753 View €0.697 €0.663 €0.621 €0.587 €0.581	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: €0.912 152In Stock 900On Order	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	152In Stock 900On Order On Order Ship Dates Mfr. No: AT4P-BT Stock: 152 Can Dispatch Immediately On Order: 300 Expected 12/10/2026 600 Expected 10/12/2026 Factory Lead Time: 18 Weeks	€0.912 €0.772 €0.741 €0.694 View €0.561 €0.501 €0.495 €0.476 €0.474	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Receptacle (Female)	Gray		Bulk
Automotive Connectors Boot (Backshell) 4way Rcpt Yellow AT4P-BT-YW Amphenol SINE Systems 1: €0.86 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	€0.86 €0.733 €0.64 €0.612 View €0.573 €0.548 €0.483 €0.452 €0.446	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Receptacle (Female)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 4-way Plug, Yellow AT4S-BT-YW Amphenol SINE Systems 1: €1.31 166In 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	166In Stock	€1.31 €1.11 €1.10 €1.06 View €0.877 €0.83 €0.788 €0.742 €0.732	Min.: 1 Mult.: 1	Accessories	Backshell	4 Position	Plug (Male)	Yellow		Bulk
Automotive Connectors Boot (Backshell) 6way Receptacle Grey AT6P-BT Amphenol SINE Systems 1: €0.817 330In Stock 600Expected 26/11/2026	Mfr. Part No. AT6P-BT Mouser Part No 654-AT6P-BT	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 6way Receptacle Grey Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	330In Stock 600Expected 26/11/2026	€0.817 €0.745 €0.717 €0.695 View €0.636 €0.578 €0.544 €0.516 €0.512	Min.: 1 Mult.: 1	Accessories	Backshell	6 Position	Receptacle (Female)	Gray	AT	Bulk
Automotive Connectors Boot (Backshell) 6way Receptacle Blk AT6P-BT-BK Amphenol SINE Systems 1: €0.972 288In Stock 300Expected 23/11/2026	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	288In Stock 300Expected 23/11/2026	€0.972 €0.741 €0.71 €0.685 View €0.617 €0.587 €0.554 €0.55	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: €1.04 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	€1.04 €0.886 €0.735 €0.709 View €0.665 €0.638 €0.538 €0.509 €0.50	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: €1.07 316In Stock 300Expected 25/09/2026	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	316In Stock 300Expected 25/09/2026	€1.07 €0.946 €0.886 €0.845 View €0.754 €0.665 €0.638 €0.636	Min.: 1 Mult.: 1	Accessories	Backshell	6 Position	Plug (Male)	Gray	AT	Bulk
Automotive Connectors Boot (Backshell) 6-way Plug, Black AT6S-BT-BK Amphenol SINE Systems 1: €1.09 247In Stock 1,200On Order	Mfr. Part No. AT6S-BT-BK Mouser Part No 654-AT6S-BT-BK	Amphenol SINE Systems	Automotive Connectors Boot (Backshell) 6-way Plug, Black Learn More about Amphenol SINE Systems amphenol at protective backshell boots	Datasheet	247In Stock 1,200On Order On Order Ship Dates Mfr. No: AT6S-BT-BK Stock: 247 Can Dispatch Immediately On Order: 600 Expected 08/12/2026 600 Expected 17/12/2026 Factory Lead Time: 18 Weeks	€1.09 €0.972 €0.877 €0.832 View €0.77 €0.732 €0.691 €0.658 €0.65	Min.: 1 Mult.: 1	Accessories	Backshell	6 Position	Plug (Male)	Black	AT	Bulk

AT Protective Backshell Boots

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