Thermal Interface Products

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Tflex SF4 Thermal Gap Fillers

Laird Tflex SF4 Thermal Gap Fillers are silicon-free and offer a 0.5mm to 4mm thickness range with 4.0W/mK thermal conductivity. These gap fillers offer excellent deflection properties, minimizing pressure on components during deflection. A minimal amount of pressure is required to reach the lowest possible thermal resistance. Laird Tflex SF4 Thermal Gap Fillers are designed for datacom systems, automotive electronics, optical modules, and cameras.

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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	Type	Package/Case	Material	Thermal Conductivity	Color	Minimum Operating Temperature	Maximum Operating Temperature	Length	Width	Thickness	Tensile Strength	Flammability Rating	Series	Packaging
Thermal Interface Products Tflex SF4 1.00 457x457mm A18840-04 Laird 1: € 218,13 8In Stock	Mfr. Part No. A18840-04 Mouser Part No 739-A18840-04	Laird	Thermal Interface Products Tflex SF4 1.00 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	8In Stock	€ 218,13 € 206,60 € 200,10 € 198,53 View Quote	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	1 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 1.50 229x229mm A18841-06 Laird 1: € 65,86 27In Stock	Mfr. Part No. A18841-06 Mouser Part No 739-A18841-06	Laird	Thermal Interface Products Tflex SF4 1.50 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	27In Stock	€ 65,86 € 60,95 € 57,95 € 57,23	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	1.5 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 2.00 229x229mm A18841-08 Laird 1: € 82,22 35In Stock	Mfr. Part No. A18841-08 Mouser Part No 739-A18841-08	Laird	Thermal Interface Products Tflex SF4 2.00 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	35In Stock	€ 82,22 € 75,24 € 67,54	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	2 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 2.50 229x229mm A18841-10 Laird 1: € 98,92 14In Stock 20Expected 12/10/2026	Mfr. Part No. A18841-10 Mouser Part No 739-A18841-10	Laird	Thermal Interface Products Tflex SF4 2.50 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	14In Stock 20Expected 12/10/2026	€ 98,92 € 93,39 € 88,78 € 85,61	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	2.5 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 3.00 229x229mm A18841-12 Laird 1: € 115,55 13In Stock	Mfr. Part No. A18841-12 Mouser Part No 739-A18841-12	Laird	Thermal Interface Products Tflex SF4 3.00 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	13In Stock	€ 115,55 € 106,31 € 104,20 € 99,57	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	3 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 3.50 229x229mm A18841-14 Laird 1: € 132,84 15In Stock	Mfr. Part No. A18841-14 Mouser Part No 739-A18841-14	Laird	Thermal Interface Products Tflex SF4 3.50 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	15In Stock	€ 132,84 € 123,58 € 119,63 € 111,18	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	3.5 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 4.00 229x229mm A18841-16 Laird 1: € 149,12 23In Stock	Mfr. Part No. A18841-16 Mouser Part No 739-A18841-16	Laird	Thermal Interface Products Tflex SF4 4.00 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	23In Stock	€ 149,12 € 138,60 € 135,10 Quote Quote	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	4 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 0.50 229x229mm A18841-02 Laird 1: € 36,12 27In Stock	Mfr. Part No. A18841-02 Mouser Part No 739-A18841-02	Laird	Thermal Interface Products Tflex SF4 0.50 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	27In Stock	€ 36,12 € 33,91 € 31,96 € 30,88	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	0.5 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 1.00 229x229mm A18841-04 Laird 1: € 49,35 3In Stock 20Expected 01/12/2026	Mfr. Part No. A18841-04 Mouser Part No 739-A18841-04	Laird	Thermal Interface Products Tflex SF4 1.00 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	3In Stock 20Expected 01/12/2026	€ 49,35 € 47,03 € 43,86 € 42,74	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	1 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 0.50 457x457mm A18840-02 Laird 10: € 141,80 Non-Stocked Lead-Time 9 Weeks	Mfr. Part No. A18840-02 Mouser Part No 739-A18840-02	Laird	Thermal Interface Products Tflex SF4 0.50 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 9 Weeks	€ 141,80 € 137,93 View Quote	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	0.5 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 0.75 457x457mm A18840-03 Laird 10: € 170,56 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-03 Mouser Part No 739-A18840-03	Laird	Thermal Interface Products Tflex SF4 0.75 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 170,56 € 164,56 View Quote	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	0.75 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 1.25 457x457mm A18840-05 Laird 10: € 236,35 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-05 Mouser Part No 739-A18840-05	Laird	Thermal Interface Products Tflex SF4 1.25 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 236,35	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	1.25 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 1.50 457x457mm A18840-06 Laird 10: € 272,65 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-06 Mouser Part No 739-A18840-06	Laird	Thermal Interface Products Tflex SF4 1.50 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 272,65	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	1.5 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 1.75 457x457mm A18840-07 Laird 10: € 308,91 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-07 Mouser Part No 739-A18840-07	Laird	Thermal Interface Products Tflex SF4 1.75 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 308,91	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	1.75 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 2.00 457x457mm A18840-08 Laird 10: € 345,20 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-08 Mouser Part No 739-A18840-08	Laird	Thermal Interface Products Tflex SF4 2.00 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 345,20	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	2 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 2.25 457x457mm A18840-09 Laird 10: € 381,49 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-09 Mouser Part No 739-A18840-09	Laird	Thermal Interface Products Tflex SF4 2.25 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 381,49	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	2.25 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 2.50 457x457mm A18840-10 Laird 10: € 417,72 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-10 Mouser Part No 739-A18840-10	Laird	Thermal Interface Products Tflex SF4 2.50 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 417,72	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	2.5 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 2.75 457x457mm A18840-11 Laird 10: € 454,05 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-11 Mouser Part No 739-A18840-11	Laird	Thermal Interface Products Tflex SF4 2.75 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 454,05	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	2.75 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 3.00 457x457mm A18840-12 Laird 10: € 490,29 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-12 Mouser Part No 739-A18840-12	Laird	Thermal Interface Products Tflex SF4 3.00 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 490,29	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	3 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 3.25 457x457mm A18840-13 Laird 10: € 526,58 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-13 Mouser Part No 739-A18840-13	Laird	Thermal Interface Products Tflex SF4 3.25 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 526,58	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	3.25 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 3.50 457x457mm A18840-14 Laird 10: € 562,89 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-14 Mouser Part No 739-A18840-14	Laird	Thermal Interface Products Tflex SF4 3.50 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 562,89	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	3.5 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 3.75 457x457mm A18840-15 Laird 10: € 599,14 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-15 Mouser Part No 739-A18840-15	Laird	Thermal Interface Products Tflex SF4 3.75 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 599,14	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	3.75 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 4.00 457x457mm A18840-16 Laird 10: € 635,69 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18840-16 Mouser Part No 739-A18840-16	Laird	Thermal Interface Products Tflex SF4 4.00 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 635,69	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	457 mm	457 mm	4 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 0.75 229x229mm A18841-03 Laird 20: € 39,08 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18841-03 Mouser Part No 739-A18841-03	Laird	Thermal Interface Products Tflex SF4 0.75 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 39,08 € 38,88 € 38,50 € 38,03 Quote Quote	Min.: 20 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	0.75 mm	30 psi	UL 94 V-0	SF4	Bulk
Thermal Interface Products Tflex SF4 1.25 229x229mm A18841-05 Laird 20: € 54,14 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A18841-05 Mouser Part No 739-A18841-05	Laird	Thermal Interface Products Tflex SF4 1.25 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	Non-Stocked Lead-Time 7 Weeks	€ 54,14 € 53,64 € 53,11 € 52,61 View Quote	Min.: 20 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free	Non-standard	Silicone	4 W/m-K	Gray (Light Gray)	- 65 C	+ 150 C	229 mm	229 mm	1.25 mm	30 psi	UL 94 V-0	SF4	Bulk

Tflex SF4 Thermal Gap Fillers

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