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 (JPY) 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: ¥42,129.6 8In Stock	Mfr. Part # A18840-04 Mouser Part # 739-A18840-04	Laird	Thermal Interface Products Tflex SF4 1.00 457x457mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	8In Stock	¥42,129.6 ¥39,902.2 ¥38,648.1 ¥38,344.2 View Quote	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥12,719.9 27In Stock	Mfr. Part # A18841-06 Mouser Part # 739-A18841-06	Laird	Thermal Interface Products Tflex SF4 1.50 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	27In Stock	¥12,719.9 ¥11,771.5 ¥11,191.8 ¥11,054	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥15,879.2 35In Stock	Mfr. Part # A18841-08 Mouser Part # 739-A18841-08	Laird	Thermal Interface Products Tflex SF4 2.00 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	35In Stock	¥15,879.2 ¥14,532.1 ¥13,043.8	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥19,104.8 14In Stock 20Expected 10/12/2026	Mfr. Part # A18841-10 Mouser Part # 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 10/12/2026	¥19,104.8 ¥18,036.8 ¥17,146.5 ¥16,535.3	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥22,317.2 13In Stock	Mfr. Part # A18841-12 Mouser Part # 739-A18841-12	Laird	Thermal Interface Products Tflex SF4 3.00 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	13In Stock	¥22,317.2 ¥20,533.3 ¥20,124.7 ¥19,231.1	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥25,655.8 15In Stock	Mfr. Part # A18841-14 Mouser Part # 739-A18841-14	Laird	Thermal Interface Products Tflex SF4 3.50 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	15In Stock	¥25,655.8 ¥23,868.6 ¥23,104.5 Quote Quote	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥28,801.7 23In Stock	Mfr. Part # A18841-16 Mouser Part # 739-A18841-16	Laird	Thermal Interface Products Tflex SF4 4.00 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	23In Stock	¥28,801.7 ¥26,768.7 ¥26,092.6 Quote Quote	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥6,976.2 27In Stock	Mfr. Part # A18841-02 Mouser Part # 739-A18841-02	Laird	Thermal Interface Products Tflex SF4 0.50 229x229mm Learn More about Laird tflex sf4 thermal gap fillers	Datasheet	27In Stock	¥6,976.2 ¥6,549.3 ¥6,172.3 ¥5,964.7	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥9,530.8 3In Stock 20Expected 11/10/2026	Mfr. Part # A18841-04 Mouser Part # 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 11/10/2026	¥9,530.8 ¥9,084 ¥8,471.1 ¥8,255.2	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥27,386.6 Non-Stocked Lead-Time 9 Weeks	Mfr. Part # A18840-02 Mouser Part # 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	¥27,386.6 ¥26,639.1 View Quote	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥32,942.6 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-03 Mouser Part # 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	¥32,942.6 ¥31,783.2 View Quote	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥45,647.6 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-05 Mouser Part # 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	¥45,647.6	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥52,658.7 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-06 Mouser Part # 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	¥52,658.7	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥59,663.1 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-07 Mouser Part # 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	¥59,663.1	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥66,670.9 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-08 Mouser Part # 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	¥66,670.9	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥73,680.3 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-09 Mouser Part # 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	¥73,680.3	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥80,678.1 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-10 Mouser Part # 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	¥80,678.1	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥87,694.2 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-11 Mouser Part # 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	¥87,694.2	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥94,693.6 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-12 Mouser Part # 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	¥94,693.6	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥101,703 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-13 Mouser Part # 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	¥101,703	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥108,715.8 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-14 Mouser Part # 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	¥108,715.8	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥115,718.5 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-15 Mouser Part # 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	¥115,718.5	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥122,777.8 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18840-16 Mouser Part # 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	¥122,777.8	Min.: 10 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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 1: ¥8,903 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18841-03 Mouser Part # 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	¥8,903 ¥7,547.6 ¥7,509.4 ¥7,436.3 View ¥7,344.9 Quote	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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: ¥10,456 Non-Stocked Lead-Time 7 Weeks	Mfr. Part # A18841-05 Mouser Part # 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	¥10,456 ¥10,359.7 ¥10,256.7 ¥10,160.3 View Quote	Min.: 20 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Silicone-Free Gap Filler	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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