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Robertshaw 5300-406 millivolt thermostat with 36 in capillary and dial range 200 to 375

Robertshaw

Robertshaw 5300-406 millivolt thermostat 200-375 °F 36 in capillary

SKU CH-RKVT-N7BY5

Millivolt thermostat controls 200-375 °F cooking equipment with a 36 in capillary and 13/16 in stem

  • Product typeLearning Thermostats
  • Millivolt operation suits gas appliances without mains power
  • 200 to 375 °F dial range covers common cooking temperatures
  • 36 inch capillary allows flexible bulb placement
  • 3/8 by 5-5/8 inch bulb fits standard mounting openings
  • Replaces KX-433 for direct service swaps

Millivolt thermostat for cooking equipment

The Robertshaw 5300-406 is a millivolt thermostat designed for electric cooking control. It operates without external power, making it suitable for gas-fired appliances that generate their own pilot voltage. The dial range spans 200 to 375 degrees Fahrenheit. It replaces the KX-433 model.

Steady temperature regulation across long cooking

Under sustained load the bulb and capillary assembly maintains consistent control throughout extended heating periods. The 36 inch capillary allows flexible routing from the control panel to the sensing bulb. A 3/8 inch by 5-5/8 inch bulb provides stable thermal response. The millivolt circuit avoids drift caused by line-voltage fluctuations.

Compact stem and capillary mounting for retrofit

A 13/16 inch stem length fits standard panel cut-outs without modification. The capillary length supports reach across larger oven cavities or fryer vats. Millivolt terminals accept pilot-generated current directly, simplifying wiring on existing equipment. No external transformer or control board is required for operation.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $105.99
Pricier than about 63% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameROBERTSHAW
Product typeLearning Thermostats

Questions about this item

How much heat does the 5300-406 thermostat generate when it regulates a 200-375 °F cooking appliance all day?

The millivolt thermostat itself produces negligible heat; it simply opens or closes the gas valve based on the 36 in capillary bulb temperature.

What gas valve and pilot assembly must already be installed for this 5300-406 millivolt thermostat to operate?

A standing-pilot millivolt gas valve rated for the appliance’s BTU output is required; the thermostat connects directly to the valve’s TH/TP terminals.

Will the 13/16 in stem and 3/8 x 5-5/8 in bulb fit the existing KX-433 mounting bracket on my older oven?

Yes, the 5300-406 is listed as a direct KX-433 replacement with identical stem length and bulb dimensions.

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