Automotive Connectors – Mouser Puerto Rico

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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 (USD) 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: $1.47 A tariff of 40% may be applied if shipping to the United States. 121In Stock	Mfr. Part # AT3S-BT-YW Mouser Part # 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	$1.47 $1.29 $1.23 $1.15 View $0.962 $0.859 $0.781 $0.778 $0.768 A tariff of 40% may be applied if shipping to the United States.	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: $0.99 A tariff of 40% may be applied if shipping to the United States. 1,439In Stock 600On Order	Mfr. Part # AT4P-BT-BK Mouser Part # 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	$0.99 $0.836 $0.746 $0.71 View $0.657 $0.625 $0.60 $0.468 A tariff of 40% may be applied if shipping to the United States.	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: $0.85 A tariff of 40% may be applied if shipping to the United States. 4,153In Stock	Mfr. Part # AT2S-BT-BK Mouser Part # 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	$0.85 $0.711 $0.643 $0.612 View $0.566 $0.538 $0.514 $0.513 $0.484 A tariff of 40% may be applied if shipping to the United States.	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: $1.47 A tariff of 40% may be applied if shipping to the United States. 7In Stock 800On Order	Mfr. Part # AT12P-BT Mouser Part # 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. #: AT12P-BT Stock: 7 Can Ship Immediately On Order: 400 Expected 10/15/2026 400 Expected 10/20/2026 Factory Lead-Time: 18 Weeks	$1.47 $1.31 $1.25 $1.01 View $0.959 $0.932 $0.897 $0.837 $0.825 A tariff of 40% may be applied if shipping to the United States.	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: $1.28 A tariff of 40% may be applied if shipping to the United States. 579In Stock 1,200Expected 12/3/2026	Mfr. Part # AT12P-BT-BK Mouser Part # 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 12/3/2026	$1.28 $1.15 $1.06 $0.958 View $0.911 $0.842 $0.755 $0.73 $0.721 A tariff of 40% may be applied if shipping to the United States.	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: $1.12 A tariff of 40% may be applied if shipping to the United States. 46In Stock	Mfr. Part # AT12P-BT-YW Mouser Part # 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	$1.12 $1.08 $0.846 $0.774 View $0.688 $0.659 $0.632 A tariff of 40% may be applied if shipping to the United States.	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: $1.29 A tariff of 40% may be applied if shipping to the United States. 959In Stock 1,200Expected 11/6/2026	Mfr. Part # AT12S-BT Mouser Part # 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 11/6/2026	$1.29 $1.16 $1.08 $0.917 View $0.916 $0.887 $0.812 $0.776 $0.766 A tariff of 40% may be applied if shipping to the United States.	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: $1.21 A tariff of 40% may be applied if shipping to the United States. 684In Stock 2,600On Order	Mfr. Part # AT12S-BT-BK Mouser Part # 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. #: AT12S-BT-BK Stock: 684 Can Ship Immediately On Order: 800 Expected 9/30/2026 1,800 Expected 11/6/2026 Factory Lead-Time: 18 Weeks	$1.21 $1.09 $1.05 $0.849 View $0.832 $0.728 $0.69 $0.685 A tariff of 40% may be applied if shipping to the United States.	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: $1.39 A tariff of 40% may be applied if shipping to the United States. 145In Stock	Mfr. Part # AT12S-BT-YW Mouser Part # 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	$1.39 $1.19 $1.06 $0.958 View $0.91 $0.866 $0.786 $0.756 $0.739 A tariff of 40% may be applied if shipping to the United States.	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: $1.03 A tariff of 40% may be applied if shipping to the United States. 694In Stock 900Expected 12/1/2026	Mfr. Part # AT2P-BT Mouser Part # 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 12/1/2026	$1.03 $0.875 $0.782 $0.744 View $0.679 $0.595 $0.557 $0.55 A tariff of 40% may be applied if shipping to the United States.	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: $1.44 A tariff of 40% may be applied if shipping to the United States. 258In Stock	Mfr. Part # AT2P-BT-YW Mouser Part # 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	$1.44 $1.23 $1.10 $1.05 View $1.04 $0.888 $0.782 $0.737 $0.725 A tariff of 40% may be applied if shipping to the United States.	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: $1.27 A tariff of 40% may be applied if shipping to the United States. 1,319In Stock 1,500Expected 11/13/2026	Mfr. Part # AT2S-BT Mouser Part # 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 11/13/2026	$1.27 $1.15 $1.12 $1.08 View $0.99 $0.82 $0.697 $0.651 $0.641 A tariff of 40% may be applied if shipping to the United States.	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: $1.54 A tariff of 40% may be applied if shipping to the United States. 78In Stock	Mfr. Part # AT2S-BT-YW Mouser Part # 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	$1.54 $1.31 $1.17 $1.12 View $1.03 $0.934 $0.819 $0.784 $0.772 A tariff of 40% may be applied if shipping to the United States.	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: $1.45 A tariff of 40% may be applied if shipping to the United States. 10In Stock 1,500On Order	Mfr. Part # AT3P-BT-BK Mouser Part # 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. #: AT3P-BT-BK Stock: 10 Can Ship Immediately On Order: 900 Expected 12/3/2026 600 Expected 12/24/2026 Factory Lead-Time: 18 Weeks	$1.45 $1.21 $1.08 $1.03 View $0.947 $0.901 $0.858 $0.81 A tariff of 40% may be applied if shipping to the United States.	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: $1.47 A tariff of 40% may be applied if shipping to the United States. 63In Stock	Mfr. Part # AT3P-BT-YW Mouser Part # 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	$1.47 $1.27 $1.07 $1.03 View $0.957 $0.936 $0.768 $0.734 $0.714 A tariff of 40% may be applied if shipping to the United States.	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: $1.31 A tariff of 40% may be applied if shipping to the United States. 5In Stock 1,500Expected 12/10/2026	Mfr. Part # AT3S-BT Mouser Part # 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 12/10/2026	$1.31 $1.12 $0.997 $0.949 View $0.878 $0.835 $0.788 $0.746 A tariff of 40% may be applied if shipping to the United States.	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: $1.21 A tariff of 40% may be applied if shipping to the United States. 416In Stock 600Expected 12/10/2026	Mfr. Part # AT3S-BT-BK Mouser Part # 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 12/10/2026	$1.21 $1.03 $0.92 $0.876 View $0.811 $0.771 $0.722 $0.683 $0.676 A tariff of 40% may be applied if shipping to the United States.	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: $1.06 A tariff of 40% may be applied if shipping to the United States. 152In Stock 900On Order	Mfr. Part # AT4P-BT Mouser Part # 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. #: AT4P-BT Stock: 152 Can Ship Immediately On Order: 300 Expected 10/12/2026 600 Expected 12/10/2026 Factory Lead-Time: 18 Weeks	$1.06 $0.898 $0.862 $0.807 View $0.652 $0.582 $0.576 $0.553 $0.551 A tariff of 40% may be applied if shipping to the United States.	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: $1.00 A tariff of 40% may be applied if shipping to the United States. 56In Stock	Mfr. Part # AT4P-BT-YW Mouser Part # 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	$1.00 $0.852 $0.744 $0.712 View $0.666 $0.637 $0.562 $0.526 $0.519 A tariff of 40% may be applied if shipping to the United States.	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: $1.52 A tariff of 40% may be applied if shipping to the United States. 166In Stock	Mfr. Part # AT4S-BT-YW Mouser Part # 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	$1.52 $1.29 $1.28 $1.23 View $1.02 $0.965 $0.916 $0.863 $0.851 A tariff of 40% may be applied if shipping to the United States.	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: $0.95 A tariff of 40% may be applied if shipping to the United States. 330In Stock 600Expected 11/26/2026	Mfr. Part # AT6P-BT Mouser Part # 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 11/26/2026	$0.95 $0.866 $0.834 $0.808 View $0.739 $0.672 $0.632 $0.60 $0.595 A tariff of 40% may be applied if shipping to the United States.	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: $1.13 A tariff of 40% may be applied if shipping to the United States. 288In Stock 300Expected 11/23/2026	Mfr. Part # AT6P-BT-BK Mouser Part # 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 11/23/2026	$1.13 $0.862 $0.825 $0.796 View $0.718 $0.717 $0.682 $0.644 $0.639 A tariff of 40% may be applied if shipping to the United States.	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: $1.21 A tariff of 40% may be applied if shipping to the United States. 280In Stock	Mfr. Part # AT6P-BT-YW Mouser Part # 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	$1.21 $1.03 $0.855 $0.824 View $0.773 $0.742 $0.625 $0.592 $0.581 A tariff of 40% may be applied if shipping to the United States.	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: $1.24 A tariff of 40% may be applied if shipping to the United States. 316In Stock 300Expected 9/25/2026	Mfr. Part # AT6S-BT Mouser Part # 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 9/25/2026	$1.24 $1.10 $1.03 $0.983 View $0.877 $0.773 $0.742 $0.739 A tariff of 40% may be applied if shipping to the United States.	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: $1.27 A tariff of 40% may be applied if shipping to the United States. 247In Stock 1,200On Order	Mfr. Part # AT6S-BT-BK Mouser Part # 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. #: AT6S-BT-BK Stock: 247 Can Ship Immediately On Order: 600 Expected 12/8/2026 600 Expected 12/17/2026 Factory Lead-Time: 18 Weeks	$1.27 $1.13 $1.02 $0.967 View $0.895 $0.851 $0.803 $0.765 $0.756 A tariff of 40% may be applied if shipping to the United States.	Min.: 1 Mult.: 1	Accessories	Backshell	6 Position	Plug (Male)	Black	AT	Bulk

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