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Rectangular black control box with multiple RCA, USB and DC ports

Celestron

Celestron Smart DewHeater Power Controller 4x Optic

SKU CH-J5P3-F9P20

Manages up to four dew-heater channels with thermistor monitoring, supplies three 12 V outputs at 7 A each plus a 3 V–12 V variable port, and adds three USB 3.2 ports at 2.5 A for accessories

  • Four dew-heater ports keep optics clear using real-time temperature data
  • Four thermistor inputs enable precise control per channel
  • Three 12 V DC outputs each supply up to 7 A for accessories
  • Three USB 3.2 Type A ports deliver 2.5 A each for cameras and peripherals
  • Variable 3 V–12 V output adds flexible power for specialised gear

Smart DewHeater Controller for Astrophotography

The Celestron Smart DewHeater Power Controller 4x Optic manages up to four dew-heater channels to keep optics clear during long imaging sessions. It suits astronomers who run multiple heater straps and need automated, temperature-based power regulation from a single unit.

Thermals Noise and Power Draw

The controller optimises battery life by delivering only the heat each optic requires, using real-time thermistor data. Three 12 V DC barrel outputs supply up to 7 A each, while a 3 V to 12 V variable port provides up to 5 A for ancillary gear.

Replaces Manual Heater Switches and Splitters

It consolidates separate heater controllers, power-distribution blocks and USB hubs into one device. The upgrade is worthwhile when you operate several dew heaters simultaneously and want per-channel automation without juggling multiple cables and switches.

How it compares

Measured against everything we stock in Binoculars, Scopes & Sights, at today’s prices. Recalculated every night.

Price $292.99
Pricier than about 72% of the 1,401 comparable items (median $93.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the dew heater rings and thermistors to the four RCA and 2.5 mm ports on the controller?

Plug each dew heater ring into one of the four RCA jack ports and, if using temperature monitoring, insert the matching thermistor into the corresponding 2.5 mm audio jack; the controller then regulates power per channel based on the sensor reading.

What ongoing care does the unit need, and which parts are most likely to wear out first?

Keep the RCA, 2.5 mm, barrel and USB sockets clean and free of moisture; the spring contacts inside the RCA and barrel connectors are the components most likely to fatigue after repeated plug cycles.

At what sustained load will the 12 V outputs hit their limit first?

Each 12 V DC barrel port is rated for a maximum of 7 A continuous, so the limit appears when any single channel draws more than 7 A or when the combined draw approaches the supply’s total capacity.

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