Board to Board & Mezzanine Connectors

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SS4/ST4 0.40mm Ultra-Fine-Pitch Connectors

Samtec SS4 / ST4 0.40mm Ultra-Fine-Pitch Connectors deliver up to 28Gbps performance and are available with up to 100 I/Os and stack heights ranging from 4mm to 6mm. These slim-footprint connectors are designed for board-to-board connections where space is at a premium. The connectors are manufactured on an ultra-fine 0.40mm pitch and come in a vertical configuration. These Razor Beam™ LP family connectors are engineered to save space on the X, Y, and Z axes. The SS4 sockets mate with the ST4 headers and vice-versa. Samtec SS4 / ST4 0.40mm Ultra-Fine-Pitch Connectors operate in a -55°C to +125°C temperature range and are ideal for applications such as 5G networking, test connectivity, artificial intelligence (AI) and machine learning, broadcast videos, medical, and more.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (JPY) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Number of Positions	Pitch	Number of Rows	Termination Style	Mounting Angle	Stack Height	Current Rating	Voltage Rating	Maximum Data Rate	Minimum Operating Temperature	Maximum Operating Temperature	Contact Plating	Contact Material	Housing Material	Data Rate	Series	Packaging
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-40-1.50-L-D-P-TR Samtec 1: ¥910.2 1,940In Stock	Mfr. Part # ST4-40-1.50-L-D-P-TR Mouser Part # 200-ST4401.50LDPTR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header Learn More about Samtec ss4 st4 connectors		1,940In Stock	Cut Tape ¥910.2 ¥734.2 ¥697.6 ¥661.1 View Reel ¥571.4 ¥617.9 ¥612.9 ¥571.4 Quote	Min.: 1 Mult.: 1 : 1,025	Headers	80 Position	0.4 mm (0.016 in)	2 Row	Solder	Vertical	4.5 mm, 5 mm	1.6 A	155 VAC	28 Gbps	- 55 C	+ 125 C	Gold	Phosphor Bronze	Liquid Crystal Polymer (LCP)	28 Gbps	ST4	Reel, Cut Tape
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-40-2.50-L-D-P-TR Samtec 1: ¥842.1 623In Stock 850Expected 1/4/2027	Mfr. Part # ST4-40-2.50-L-D-P-TR Mouser Part # 200-ST4402.50LDPTR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header Learn More about Samtec ss4 st4 connectors		623In Stock 850Expected 1/4/2027	Cut Tape ¥842.1 ¥745.8 ¥700.9 ¥666.1 Reel ¥632.8 View ¥634.5 ¥583 Quote MouseReel Available	Min.: 1 Mult.: 1 : 850	Headers	80 Position	0.4 mm (0.016 in)	2 Row	Solder	Vertical	5.5 mm, 6 mm	1.6 A	155 VAC	28 Gbps	- 55 C	+ 125 C	Gold	Phosphor Bronze	Liquid Crystal Polymer (LCP)	28 Gbps	ST4	Reel, Cut Tape, MouseReel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-50-1.50-L-D-P-TR Samtec 1: ¥978.3 1,557In Stock	Mfr. Part # ST4-50-1.50-L-D-P-TR Mouser Part # 200-ST4501.50LDPTR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header Learn More about Samtec ss4 st4 connectors		1,557In Stock	Cut Tape ¥978.3 ¥830.5 ¥739.1 ¥707.6 Reel ¥647.8 View ¥676 ¥596.3 Quote MouseReel Available	Min.: 1 Mult.: 1 : 850	Headers	100 Position	0.4 mm (0.016 in)	2 Row	Solder	Vertical	4.5 mm, 5 mm	1.6 A	155 VAC	28 Gbps	- 55 C	+ 125 C	Gold	Phosphor Bronze	Liquid Crystal Polymer (LCP)	28 Gbps	ST4	Reel, Cut Tape, MouseReel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-15-3.50-L-D-K-TR Samtec 1: ¥418.6 135In Stock 1,000Expected 11/2/2026	Mfr. Part # SS4-15-3.50-L-D-K-TR Mouser Part # 200-SS415350LDKTR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket Learn More about Samtec ss4 st4 connectors		135In Stock 1,000Expected 11/2/2026	Cut Tape ¥418.6 ¥387 ¥342.2 Reel ¥342.2 ¥287.4 Quote Quote	Min.: 1 Mult.: 1 : 1,000	Sockets	30 Position	0.4 mm (0.016 in)	2 Row	Solder	Vertical	4.5 mm, 5 mm, 6 mm	1.6 A	155 VAC	28 Gbps	- 55 C	+ 125 C	Gold	Phosphor Bronze	Liquid Crystal Polymer (LCP)	28 Gbps	SS4	Reel, Cut Tape
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-10-3.00-L-D-K-FR Samtec 1,150: ¥345.5 Non-Stocked Lead-Time 6 Weeks	Mfr. Part # SS4-10-3.00-L-D-K-FR Mouser Part # 200-SS4103.00LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 6 Weeks	Reel ¥345.5 ¥318.9 View Quote	Min.: 1,150 Mult.: 1,150 : 1,150																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-10-3.50-L-D-K-FR Samtec 1,025: ¥358.8 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # SS4-10-3.50-L-D-K-FR Mouser Part # 200-SS4103.50LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 7 Weeks	Reel ¥358.8 ¥357.1 View Quote	Min.: 1,025 Mult.: 1,025 : 1,025																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-15-3.00-L-D-K-FR Samtec 1,150: ¥348.8 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # SS4-15-3.00-L-D-K-FR Mouser Part # 200-SS4153.00LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 10 Weeks	Reel ¥348.8 ¥347.1 ¥342.2 Quote Quote	Min.: 1,150 Mult.: 1,150 : 1,150																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-15-3.50-L-D-K-FR Samtec 1,000: ¥355.5 Non-Stocked Lead-Time 2 Weeks	Mfr. Part # SS4-15-3.50-L-D-K-FR Mouser Part # 200-SS4153.50LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 2 Weeks	Reel ¥355.5 ¥353.8 ¥342.2 Quote Quote	Min.: 1,000 Mult.: 1,000 : 1,000																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-20-3.00-L-D-K-FR Samtec 1,150: ¥393.7 Non-Stocked Lead-Time 5 Weeks	Mfr. Part # SS4-20-3.00-L-D-K-FR Mouser Part # 200-SS4203.00LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 5 Weeks	Reel ¥393.7 Quote Quote	Min.: 1,150 Mult.: 1,150 : 1,150																	SS4	Reel
Board to Board & Mezzanine Connectors SS4-20-3.00-L-D-L-K-TR Samtec 850: ¥490 Non-Stocked Lead-Time 2 Weeks New Product	Mfr. Part # SS4-20-3.00-L-D-L-K-TR Mouser Part # 200-SS4203.00LDLKTR New Product	Samtec	Board to Board & Mezzanine Connectors	Datasheet	Non-Stocked Lead-Time 2 Weeks	Reel ¥490 ¥466.7 ¥398.6 Quote Quote	Min.: 850 Mult.: 850 : 850																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-20-3.50-L-D-K-FR Samtec 1,025: ¥393.7 Non-Stocked Lead-Time 6 Weeks	Mfr. Part # SS4-20-3.50-L-D-K-FR Mouser Part # 200-SS4203.50LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 6 Weeks	Reel ¥393.7 Quote Quote	Min.: 1,025 Mult.: 1,025 : 1,025																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-30-3.50-L-D-K-FR Samtec 1,025: ¥486.7 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # SS4-30-3.50-L-D-K-FR Mouser Part # 200-SS4303.50LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 7 Weeks	Reel ¥486.7 Quote Quote	Min.: 1,025 Mult.: 1,025 : 1,025																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-30-3.00-L-D-K-FR Samtec 1,150: ¥483.4 Non-Stocked Lead-Time 5 Weeks	Mfr. Part # SS4-30-3.00-L-D-K-FR Mouser Part # 200-SS430300LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket Learn More about Samtec ss4 st4 connectors		Non-Stocked Lead-Time 5 Weeks	Reel ¥483.4 View Quote	Min.: 1,150 Mult.: 1,150 : 1,150																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-40-3.00-L-D-K-FR Samtec 1,225: ¥574.7 Non-Stocked Lead-Time 3 Weeks	Mfr. Part # SS4-40-3.00-L-D-K-FR Mouser Part # 200-SS4403.00LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 3 Weeks	Reel ¥574.7 Quote Quote	Min.: 1,225 Mult.: 1,225 : 1,225																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-40-3.50-L-D-K-FR Samtec 800: ¥626.2 Non-Stocked Lead-Time 2 Weeks	Mfr. Part # SS4-40-3.50-L-D-K-FR Mouser Part # 200-SS4403.50LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 2 Weeks	Reel ¥626.2 Quote Quote	Min.: 800 Mult.: 800 : 800																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-50-3.00-L-D-K-FR Samtec 675: ¥654.4 Non-Stocked Lead-Time 3 Weeks	Mfr. Part # SS4-50-3.00-L-D-K-FR Mouser Part # 200-SS4503.00LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 3 Weeks	Reel ¥654.4 Quote Quote	Min.: 675 Mult.: 675 : 675																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket SS4-50-3.50-L-D-K-FR Samtec 825: ¥654.4 Non-Stocked Lead-Time 3 Weeks	Mfr. Part # SS4-50-3.50-L-D-K-FR Mouser Part # 200-SS4503.50LDKFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Socket		Non-Stocked Lead-Time 3 Weeks	Reel ¥654.4 Quote Quote	Min.: 825 Mult.: 825 : 825																	SS4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-10-1.00-L-D-P-FR Samtec 1,200: ¥342.2 Non-Stocked Lead-Time 4 Weeks	Mfr. Part # ST4-10-1.00-L-D-P-FR Mouser Part # 200-ST4101.00LDPFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header		Non-Stocked Lead-Time 4 Weeks	Reel ¥342.2 ¥315.6 View Quote	Min.: 1,200 Mult.: 1,200 : 1,200																	ST4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-10-1.50-L-D-P-FR Samtec 1,025: ¥357.1 Non-Stocked Lead-Time 8 Weeks	Mfr. Part # ST4-10-1.50-L-D-P-FR Mouser Part # 200-ST4101.50LDPFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header		Non-Stocked Lead-Time 8 Weeks	Reel ¥357.1 ¥355.5 ¥345.5 Quote Quote	Min.: 1,025 Mult.: 1,025 : 1,025																	ST4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-10-2.50-L-D-P-FR Samtec 850: ¥373.7 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # ST4-10-2.50-L-D-P-FR Mouser Part # 200-ST4102.50LDPFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header		Non-Stocked Lead-Time 12 Weeks	Reel ¥373.7 Quote Quote	Min.: 850 Mult.: 850 : 850																	ST4	Reel
Board to Board & Mezzanine Connectors ST4-15-1.00-L-D-L-P-TR Samtec 850: ¥436.8 Non-Stocked Lead-Time 3 Weeks New Product	Mfr. Part # ST4-15-1.00-L-D-L-P-TR Mouser Part # 200-ST4151.00LDLPTR New Product	Samtec	Board to Board & Mezzanine Connectors		Non-Stocked Lead-Time 3 Weeks	Reel ¥436.8 ¥411.9 ¥353.8 Quote Quote	Min.: 850 Mult.: 850 : 850																	ST4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-15-1.00-L-D-P-FR Samtec 1,125: ¥345.5 Non-Stocked Lead-Time 8 Weeks	Mfr. Part # ST4-15-1.00-L-D-P-FR Mouser Part # 200-ST4151.00LDPFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header		Non-Stocked Lead-Time 8 Weeks	Reel ¥345.5 ¥343.8 ¥342.2 ¥337.2 Quote Quote	Min.: 1,125 Mult.: 1,125 : 1,125																	ST4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-15-1.50-L-D-P-FR Samtec 1,050: ¥352.1 Non-Stocked Lead-Time 8 Weeks	Mfr. Part # ST4-15-1.50-L-D-P-FR Mouser Part # 200-ST4151.50LDPFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header		Non-Stocked Lead-Time 8 Weeks	Reel ¥352.1 ¥350.5 ¥340.5 Quote Quote	Min.: 1,050 Mult.: 1,050 : 1,050																	ST4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-20-1.00-L-D-P-FR Samtec 1,125: ¥388.7 Non-Stocked Lead-Time 5 Weeks	Mfr. Part # ST4-20-1.00-L-D-P-FR Mouser Part # 200-ST4201.00LDPFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header		Non-Stocked Lead-Time 5 Weeks	Reel ¥388.7 View Quote	Min.: 1,125 Mult.: 1,125 : 1,125																	ST4	Reel
Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header ST4-20-1.50-L-D-P-FR Samtec 1,025: ¥393.7 Non-Stocked Lead-Time 2 Weeks	Mfr. Part # ST4-20-1.50-L-D-P-FR Mouser Part # 200-ST4201.50LDPFR	Samtec	Board to Board & Mezzanine Connectors 0.40 mm Micro Blade & Beam Ultra Fine Pitch Header		Non-Stocked Lead-Time 2 Weeks	Reel ¥393.7 Quote Quote	Min.: 1,025 Mult.: 1,025 : 1,025																	ST4	Reel