--- title: "8540 – Thermionic, cold cathode or…: Canada tariff & duty rates" description: "Every Canadian tariff classification under HS 8540: Thermionic, cold cathode or photo-cathode valves and tubes (for example, vacuum or vapour or gas…" canonical: "https://www.adhocs.ca/hs-codes/8540" --- # 8540 Thermionic, cold cathode or photo-cathode valves and tubes (for example, vacuum or vapour or gas filled valves and tubes, mercury arc rectifying valves and tubes, cathode-ray tubes, television camera tubes). Up: [HS codes](https://www.adhocs.ca/hs-codes) › [Chapter 85](https://www.adhocs.ca/hs-codes/85) 11 subheadings. Each subheading links to its page, which lists its 10-digit codes, or to its only 10-digit code. ## Cathode-ray television picture tubes, including video monitor cathode-ray tubes - [8540.11](https://www.adhocs.ca/hs-codes/8540.11) Colour - [8540.12](https://www.adhocs.ca/hs-codes/8540.12) Monochrome - [8540.20.00.00](https://www.adhocs.ca/hs-codes/8540.20.00.00) Television camera tubes; image converters and intensifiers; other photo-cathode tubes - [8540.40.00.00](https://www.adhocs.ca/hs-codes/8540.40.00.00) Data/graphic display tubes, monochrome; data/graphic display tubes, colour, with a phosphor dot screen pitch smaller than 0.4 mm - [8540.60.00.00](https://www.adhocs.ca/hs-codes/8540.60.00.00) Other cathode-ray tubes ## Microwave tubes (for example, magnetrons, klystrons, travelling wave tubes, carcinotrons), excluding grid-controlled tubes - [8540.71.00.00](https://www.adhocs.ca/hs-codes/8540.71.00.00) Magnetrons - [8540.79.00.00](https://www.adhocs.ca/hs-codes/8540.79.00.00) Other ## Other valves and tubes - [8540.81.00.00](https://www.adhocs.ca/hs-codes/8540.81.00.00) Receiver or amplifier valves and tubes - [8540.89.00.00](https://www.adhocs.ca/hs-codes/8540.89.00.00) Other ## Parts - [8540.91](https://www.adhocs.ca/hs-codes/8540.91) Of cathode-ray tubes - [8540.99](https://www.adhocs.ca/hs-codes/8540.99) Other ## Other headings in this chapter - Previous: [8539](https://www.adhocs.ca/hs-codes/8539) Electric filament or discharge lamps, including sealed beam lamp units and ultra-violet or infra-red lamps; arc-lamps, light-emitting diode (LED) light sources. - Next: [8541](https://www.adhocs.ca/hs-codes/8541) Semiconductor devices (for example, diodes, transistors, semiconductor-based transducers); photosensitive semiconductor devices, including photovoltaic cells whether or not assembled in modules or made up into panels; light-emitting diodes (LED), whether or not assembled with other light-emitting diodes (LED); mounted piezo-electric crystals. [Source: CBSA Customs Tariff](https://www.cbsa-asfc.gc.ca/trade-commerce/tariff-tarif/menu-eng.html).