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Seifert 503251 KH503 250W 115V Control Cabinet Resistor Heater

Seifert KH 503-251 Control Cabinet Heater
Seifert 503251 KH503 250W 115V Control Cabinet Resistor Heater

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Our Price: $134.51
Note: Ships in 3-4 business days
MFG P/N: 503251
MFG: Seifert
Weight (lbs): 2

Product Code: 503251


The Seifert KH 503-251 is a 250W, 115V fan assisted resistor control cabinet heater. It has a pilot light to indicate when it's on and built in protection from overheating. It has an anodized aluminum housing and is DIN Rail mountable. Designed for applications that require a bigger heating capacity or air circulation. UL recognized.

  • Fan assisted resistor
  • Lightweight & easy maintenance
  • Fan useful in air circulation inside enclosure
  • Prevents condensation build-up
  • Can be used with a thermostat
  • Rated IP 20
  • RoHS compliant


  • Dimensions- 5.3" Height x 3.2" Width x 4.4" Depth
  • Heating Power at 50 F- 250 W
  • Operating Temperature Range- -13 F to +158 F (-25 C to 70 C)
  • Rated Voltage- 120V 50/60Hz
  • Max. Current- 2.4 A
  • Heating Element Type- Self-regulating PTC resistor
  • Fan Airflow- 20 CFM
  • Connection Type- 3 Screw terminals for stranded or rigid wire 14 AWG
  • Approvals- CE, cURus
  • Ingress Protection- IP 20

115V Resistor Enclosure Heater Seifert 503251

Additional Product Information
When the inside temperature of a control cabinet changes, humidity or condensation can build inside. The additional moisture can cause equipment damage or performance failure. Using a fan assisted resistor heater such as the KH 503-251, warmer air can be dispersed on the inside, lowering the risk. It also helps to ensure a safe minimum temperature if needed. Enclosures that are in outdoor settings receive the most advantage from a heater, as they are exposed to the outside elements.