We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Q-Mark CDFDS disconnect switch unit-mounted 277V 30A 60Hz

Q-Mark

Q-Mark CDFDS Disconnect Switch 277V 30A 60Hz

SKU CH-CK3X-3NR75

Unit-mounted disconnect switch rated 30 A at 277 V AC for CDF series heaters

  • Unit-mounted disconnect installs directly on heater
  • 277 V AC rating matches CDF series requirements
  • 30 A capacity handles high-draw heating loads
  • 60 Hz operation suits standard North American power
  • 120–277 V range covers common service voltages

Industrial Disconnect Switch

The Q-Mark CDFDS is a unit-mounted disconnect switch rated for 30 amps at 277 volts AC. It provides a local power-isolation point for CDF series heaters in commercial or industrial HVAC installations.

Electrical Ratings in Service

The device operates on single-phase supplies from 120 to 277 volts AC at 60 Hz. Its 30-amp capacity handles the full load of compatible heaters without requiring an external enclosure.

Replaces External Disconnects

This switch replaces a separate wall-mounted disconnect when local code permits unit-mounted isolation. The upgrade is worth it when the heater location allows safe, accessible switching directly on the appliance.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $289.99
Pricier than about 90% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameQMARK

Questions about this item

How do I wire the CDFDS disconnect switch to a CDF series heater, and what step is most often missed?

Connect the 120–277 V AC supply to the line terminals and the heater leads to the load terminals; the step most often missed is confirming the circuit is single-phase 60 Hz before energising.

What maintenance or replacement will the CDFDS disconnect switch need over time?

The switch contacts are rated for 30 A at 277 V AC; periodic visual inspection for pitting or overheating is recommended, and the unit should be replaced if contact wear prevents clean make-break operation.

What is the first limit reached when the CDFDS disconnect switch runs continuously at full load?

The 30 A / 277 V AC rating is the limiting factor; sustained operation above 30 amperes will cause the contacts to overheat and degrade before any other parameter is exceeded.

More in Heating & Cooling Controllers

Similar items