Thermal Interface Products – Mouser United Kingdom

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Tflex™ RB300 Thermal Gap Filler

Laird Tflex™ RB300 Thermal Gap Filler is an exceptionally soft gap filler pad with thermal conductivity of 1.2W/mK. This thermal conductivity enables low thermal resistance at low pressures. Laird Tflex RB300 gap filler is specially formulated to minimize the amount of silicone oil bleed in sensitive applications. This thermal gap filler is naturally tacky and requires no additional adhesive coating that can inhibit thermal performance.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) 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	Flammability Rating	Series	Packaging
Thermal Interface Products Tflex RB360, 9x9IN, A18145-06 Laird 1: £27.05 26In Stock	Mfr. Part No. A18145-06 Mouser Part No 739-A18145-06	Laird	Thermal Interface Products Tflex RB360, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	26In Stock	£27.05	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB330FG, 9x9IN, A18145-03 Laird 1: £14.88 56In Stock	Mfr. Part No. A18145-03 Mouser Part No 739-A18145-03	Laird	Thermal Interface Products Tflex RB330FG, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	56In Stock	£14.88 £14.02 £13.20 £12.38 View £11.65 £11.09 £10.69	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB320FG, 9x9IN, A18145-02 Laird 1: £13.99 67Expected 30/11/2026	Mfr. Part No. A18145-02 Mouser Part No 739-A18145-02	Laird	Thermal Interface Products Tflex RB320FG, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	67Expected 30/11/2026	£13.99 £13.19 £12.41 £11.64 £10.97	Min.: 1 Mult.: 1	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB320, 18x18IN, A18144-02 Laird 18: £39.03 Non-Stocked	Mfr. Part No. A18144-02 Mouser Part No 739-A18144-02	Laird	Thermal Interface Products Tflex RB320, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£39.03 £36.81	Min.: 18 Mult.: 18	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB340, 9x9IN, A18145-04 Laird 45: £13.05 Non-Stocked	Mfr. Part No. A18145-04 Mouser Part No 739-A18145-04	Laird	Thermal Interface Products Tflex RB340, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£13.05 £12.36 £12.31	Min.: 45 Mult.: 45	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB380, 9x9IN, A18145-08 Laird 25: £29.12 Non-Stocked	Mfr. Part No. A18145-08 Mouser Part No 739-A18145-08	Laird	Thermal Interface Products Tflex RB380, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£29.12 £29.11	Min.: 25 Mult.: 25	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB3100, 9x9IN, A18145-10 Laird 21: £35.02 Non-Stocked	Mfr. Part No. A18145-10 Mouser Part No 739-A18145-10	Laird	Thermal Interface Products Tflex RB3100, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£35.02 £33.86	Min.: 21 Mult.: 21	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB3120, 9x9IN, A18145-12 Laird 18: £40.90 Non-Stocked	Mfr. Part No. A18145-12 Mouser Part No 739-A18145-12	Laird	Thermal Interface Products Tflex RB3120, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£40.90 £39.34 £38.51	Min.: 18 Mult.: 18	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB3140, 9x9IN, A18145-14 Laird 15: £48.15 Non-Stocked	Mfr. Part No. A18145-14 Mouser Part No 739-A18145-14	Laird	Thermal Interface Products Tflex RB3140, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£48.15 £46.36 £45.95 Quote Quote	Min.: 15 Mult.: 15	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB3160, 9x9IN, A18145-16 Laird 14: £54.41 Non-Stocked	Mfr. Part No. A18145-16 Mouser Part No 739-A18145-16	Laird	Thermal Interface Products Tflex RB3160, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£54.41 £52.34 £51.96 £50.61 View Quote	Min.: 14 Mult.: 14	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB3180, 9x9IN, A18145-18 Laird 12: £61.39 Non-Stocked	Mfr. Part No. A18145-18 Mouser Part No 739-A18145-18	Laird	Thermal Interface Products Tflex RB3180, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£61.39 £59.25 £59.23 £57.03 View Quote	Min.: 12 Mult.: 12	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB3200, 9x9IN, A18145-20 Laird 11: £77.33 Non-Stocked	Mfr. Part No. A18145-20 Mouser Part No 739-A18145-20	Laird	Thermal Interface Products Tflex RB3200, 9x9IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£77.33 £72.93 £72.82 Quote Quote	Min.: 11 Mult.: 11	Gap Fillers / Gap Pads / Sheets	Gap Filler Pad	Non-standard	Ceramic Filled Silicone	1.2 W/mK	Gray	- 25 C	+ 200 C	228.6 mm	228.6 mm	0.5 mm to 5.08 mm	UL 94 V-0	Tflex RB300	Bulk
Thermal Interface Products Tflex RB330, 18x18IN, Laird A18144-03 A18144-03 Laird 14: £51.68 Non-Stocked	Mfr. Part No. A18144-03 Mouser Part No 739-A18144-03	Laird	Thermal Interface Products Tflex RB330, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£51.68 £48.74	Min.: 14 Mult.: 14	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB340, 18x18IN, Laird A18144-04 A18144-04 Laird 12: £62.71 Non-Stocked	Mfr. Part No. A18144-04 Mouser Part No 739-A18144-04	Laird	Thermal Interface Products Tflex RB340, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£62.71 £59.13	Min.: 12 Mult.: 12	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB350, 18x18IN, Laird A18144-05 A18144-05 Laird 10: £75.32 Non-Stocked	Mfr. Part No. A18144-05 Mouser Part No 739-A18144-05	Laird	Thermal Interface Products Tflex RB350, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£75.32 £71.04	Min.: 10 Mult.: 10	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB360, 18x18IN, Laird A18144-06 A18144-06 Laird 8: £87.86 Non-Stocked	Mfr. Part No. A18144-06 Mouser Part No 739-A18144-06	Laird	Thermal Interface Products Tflex RB360, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£87.86 £82.86	Min.: 8 Mult.: 8	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB370, 18x18IN, Laird A18144-07 A18144-07 Laird 7: £96.51 Non-Stocked	Mfr. Part No. A18144-07 Mouser Part No 739-A18144-07	Laird	Thermal Interface Products Tflex RB370, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£96.51 £94.69	Min.: 7 Mult.: 7	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB380, 18x18IN, Laird A18144-08 A18144-08 Laird 7: £108.69 Non-Stocked	Mfr. Part No. A18144-08 Mouser Part No 739-A18144-08	Laird	Thermal Interface Products Tflex RB380, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£108.69 £106.64	Min.: 7 Mult.: 7	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB390, 18x18IN, Laird A18144-09 A18144-09 Laird 6: £132.54 Non-Stocked	Mfr. Part No. A18144-09 Mouser Part No 739-A18144-09	Laird	Thermal Interface Products Tflex RB390, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£132.54 £118.41	Min.: 6 Mult.: 6	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB3100, 18x18IN, Laird A18144-10 A18144-10 Laird 6: £145.84 Non-Stocked	Mfr. Part No. A18144-10 Mouser Part No 739-A18144-10	Laird	Thermal Interface Products Tflex RB3100, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£145.84 £130.30	Min.: 6 Mult.: 6	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB3110, 18x18IN, Laird A18144-11 A18144-11 Laird 5: £156.80 Non-Stocked	Mfr. Part No. A18144-11 Mouser Part No 739-A18144-11	Laird	Thermal Interface Products Tflex RB3110, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£156.80 £142.12	Min.: 5 Mult.: 5	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB3120, 18x18IN, Laird A18144-12 A18144-12 Laird 5: £169.92 Non-Stocked	Mfr. Part No. A18144-12 Mouser Part No 739-A18144-12	Laird	Thermal Interface Products Tflex RB3120, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£169.92 £154.02	Min.: 5 Mult.: 5	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB3130, 18x18IN, Laird A18144-13 A18144-13 Laird 4: £181.39 Non-Stocked	Mfr. Part No. A18144-13 Mouser Part No 739-A18144-13	Laird	Thermal Interface Products Tflex RB3130, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£181.39 £165.87	Min.: 4 Mult.: 4	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB3140, 18x18IN, Laird A18144-14 A18144-14 Laird 4: £194.37 Non-Stocked	Mfr. Part No. A18144-14 Mouser Part No 739-A18144-14	Laird	Thermal Interface Products Tflex RB3140, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£194.37 £177.73	Min.: 4 Mult.: 4	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk
Thermal Interface Products Tflex RB3150, 18x18IN, Laird A18144-15 A18144-15 Laird 4: £205.16 Non-Stocked	Mfr. Part No. A18144-15 Mouser Part No 739-A18144-15	Laird	Thermal Interface Products Tflex RB3150, 18x18IN, Learn More about Laird tflex rb300 thermal gap fillers	Datasheet	Non-Stocked	£205.16 £189.61 £189.59	Min.: 4 Mult.: 4	Gap Fillers / Gap Pads / Sheets		Non-standard										Tflex RB300	Bulk

Tflex™ RB300 Thermal Gap Filler

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