Finnex STE-600 digital titanium aquarium heater

Finnex lists the STE-600 as a 600 W digital titanium heater for 120–150 US gallons, with 5 A shown in its model table and an adjustable 68–92°F span. The lower volume boundary matters as much as the 150-gallon ceiling; this is an exact-model reference, not a finder recommendation.

Search results may include other models. Confirm the exact model, applicable region, condition and included parts before ordering.

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Documented model details

• Finnex’s US Shop variant data pairs the 600 W selector with SKU STE-600, UPC 850006562435, and a distinct variant ID; it is separate from the STE-400 and STE-800 configurations.
• The official STE-600 specification row lists 600 W, 5 A, 68–92°F, and 120–150 US gallons. The model graphic does not say what voltage the 5 A figure references; it also states a six-foot cord for the STE sizes.
• Finnex describes the STE control as digital and remotely sensed, and describes the heater as suitable for freshwater and marine aquariums. Its series comparison lists a titanium tube, nickel coil, ETL listing to UL standards, and a non-resumable fuse in the out-of-water protection row. These are maker statements, not independent safety or performance testing.

Limits to weigh

• The 120–150 US-gallon specification is two-sided. This finder can screen only against the 150-gallon maximum, not the 120-gallon floor, so the STE-600 remains reference-only and is not a recommendation for smaller tanks.
• The STE model table lists 5 A but gives no voltage basis. The reviewed sources do not establish this exact unit’s full voltage or frequency; verify the actual nameplate rather than treating the amperage as a complete supply specification.
• The checked Finnex instructions index showed manuals for other families but no STE manual. The exact immersion depth, orientation, waterline, clearance, and dry-operation permission remain unknown; do not infer them from the photo or another heater family.
• Finnex’s ±1°F accuracy and redundancy descriptions are manufacturer claims, not independent measurements or a failure-rate guarantee. Use a separate thermometer to verify aquarium water.
• Finnex’s saved Shop snapshot showed the selector sold out, and the 2026-11-04 Amazon.com US model search returned HTTP 503 before results or listing details. Neither observation establishes that no listing exists or that the model is discontinued.

Check before ordering

• Confirm that the offer and carton identify Finnex STE-600 / 600 W, SKU STE-600, and not the STE-400 or STE-800 sibling.
• Treat 120–150 US gallons as a two-sided maker range; do not choose this reference only because a tank is below the 150-gallon upper bound.
• Read the exact unit/controller nameplate and supplied documents for voltage, frequency, installation and immersion instructions; the listed 5 A alone does not settle supply compatibility.
• Verify the seller’s actual offer and included parts. The identity photograph is not proof that a particular listing includes the shown controller, guard or accessories.
• After installation according to the exact supplied directions, verify actual water temperature independently; the stated control range and ±1°F claim are not an independent temperature measurement.
• The saved Amazon.com US lookup was blocked before listing details could be inspected. The fixed link is a labelled exact-model search, not a confirmed STE-600 ASIN or product-listing match.