Model reference
Finnex TH-300S 300 W Titanium Heater Element
Model: Finnex TH-300S titanium aquarium heater element, 300 W
Finnex’s US Shop selector identifies a 300 W TH tube-only option, while the family table names TH-300S and the separately documented HC-820M combo table uses the zero-padded label TH-0300S. This reference retains those source labels and covers the tube configuration only; it does not establish a standalone seller SKU/UPC, a seller’s package, an exact controller included, or model-specific installation instructions. It does not assert compatibility with questionnaire answers.
This model lookup is separate from the questionnaire shortlist. It does not certify that this model meets your selected requirements.
Exact-model photograph is not verified. Text-only reference. Finnex’s official TH family photograph is shared across wattage options and does not identify the selected 300 W assembly or package; it is not presented here as an exact TH-300S photo.
Finnex lists the TH-300S as a 300 W titanium heating tube for 40–80 US gallons, with a 10-inch length and 0.75-inch diameter. Its minimum tank size is not enforced by this finder, and the standalone offer requires a separate controller, so this is a model-identification reference—not a ready-to-use recommendation.
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Documented model details
- The TH-300S family row lists 300 W, 120 V, 2.7 A, a 40–80 US-gallon band, a 10-inch tube and a 0.75-inch diameter. The related combo table’s TH-0300S current entry has a different stated voltage reference, so the 2.7 A basis is left unresolved.
- The grouped Shop page labels the selection “titanium tube only” and says controllers are sold separately. Finnex separately documents an HC-820M/TH combo; that pairing does not make the controller part of every TH-300S offer.
- Finnex describes TH as a titanium tube with a high-temperature guard and freshwater/marine use. It compares TH’s extended quartz sleeve/coil design with the slimmer THD-300S; its claimed design advantages are not independent performance results.
Limits to weigh
- The maker’s 40–80-gallon range includes a 40-gallon minimum that the current max-only finder cannot enforce. This lookup is not a tank-fit recommendation.
- The TH family table places 120 V and 2.7 A in adjacent fields, while the separate combo table labels 2.7 A at 115 V for TH-0300S. No single amperage reference is asserted; frequency and a complete supply rating are not established.
- No standalone retail SKU/UPC, complete seller package or included controller is established. The Shop offer is a tube-only configuration; verify controller compatibility and parts separately.
- The reviewed heater sources do not give TH-300S-specific immersion, orientation, clearance, dry-operation or inline-installation directions. The HC-820M manual describes the controller, not the heater element.
- The official TH gallery image is shared across 300/500/800 W options and does not identify a TH-300S package or selected assembly; this reference page is text-only.
Check before ordering
- Verify the tube is marked TH-300S / 300 W. The separate combo page’s TH-0300S label is not a confirmed retail SKU; do not treat a generic model title as package proof.
- Check the full 40–80 US-gallon band, including the 40-gallon floor, and do not interpret the upper value as a heat-up guarantee.
- Confirm which separate temperature controller is compatible, its load/connection limits, and whether the seller’s package actually includes it; a bare tube is not a complete thermostat-controlled setup.
- Check the element and controller nameplates for complete electrical input and obtain instructions for the exact tube/controller combination before installation. The 10-inch tube length is not a clearance measurement.
- If using the model-search action, inspect the actual result for TH-300S, 300 W, controller inclusion, seller and condition; a search result is not an exact product match.