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Seifert KH 503-750 750W 230V Fan-Assisted Enclosure Heater, 26 CFM DIN Rail Mount
750W Seifert control cabinet heater with 230V input, 26 CFM forced airflow, self-regulating PTC heat, pilot light, overheat protection, and DIN-rail mounting.
Why Choose the Seifert KH 503-750?
The Seifert KH 503-750 delivers 750W of fan-assisted heat for larger control cabinets and applications with greater enclosure heat loss. Its 26 CFM fan moves warm air through the cabinet, helping reduce cold zones and maintain a more consistent temperature around electrical equipment.
A self-regulating PTC resistor provides responsive heating, while the pilot light indicates operating status and integrated overheat protection supports dependable service. The anodized aluminum housing installs on DIN rail for efficient use of panel space.
🔥 750W Heating Power
Provides high-capacity heat for demanding enclosures
💨 26 CFM Airflow
Circulates more warm air through larger control cabinets
⚡ 230V Operation
Rated for 230V, 50/60 Hz systems
🛡️ Built-In Protection
Pilot light and integrated overheat protection support operation
⚠️ Confirm High-Capacity Heater Requirements
Verify that 750W of heating output is appropriate for the enclosure and that the 230V, 50/60 Hz circuit supports the listed 3.6A maximum current. Maintain clear air paths around the 26 CFM fan.
📋 Forced-Air Heating for Larger Control Cabinets
The KH 503-750 distributes warm air throughout the cabinet to help control condensation and maintain a safe minimum temperature during changing ambient conditions. Its higher heating output is intended for applications that exceed the capacity of smaller enclosure heaters.
Key Features and Benefits
- 750W fan-assisted control cabinet heater
- 230V, 50/60 Hz rated voltage
- 26 CFM fan airflow
- Self-regulating PTC resistor
- Pilot light indicates operation
- Integrated overheat protection
- Anodized aluminum housing
- DIN-rail mounting
- Thermostat compatible
- IP20 protection rating
- CE and cURus approvals
- RoHS compliant
Technical Specifications
| Brand |
Seifert |
| Model |
KH 503-750 |
| Product Type |
Fan-Assisted PTC Enclosure Heater |
| Heating Power at 50°F |
750W |
| Rated Voltage |
230V, 50/60 Hz |
| Maximum Current |
3.6A |
| Fan Airflow |
26 CFM |
| Heating Element |
Self-Regulating PTC Resistor |
| Operating Temperature |
-13°F to 158°F (-25°C to 70°C) |
| Dimensions |
8.8 in. H x 3.2 in. W x 4.4 in. D |
| Housing |
Anodized Aluminum |
| Connection |
3 Screw Terminals for 14 AWG Stranded or Rigid Wire |
| Mounting |
DIN Rail |
| Ingress Protection |
IP20 |
| Approvals |
CE, cURus |
| Compliance |
RoHS |
🔧 Installation and Setup Overview
1. Calculate Heat Loss: Confirm that the enclosure requires 750W of heating capacity under the expected ambient conditions.
2. Verify Electrical Capacity: Confirm a 230V, 50/60 Hz supply and circuit protection suitable for the stated current.
3. Provide Airflow Space: Mount the heater on DIN rail with clear inlet and outlet paths for 26 CFM circulation.
4. Connect Wiring: Use compatible 14 AWG stranded or rigid wire at the three screw terminals.
5. Commission the Unit: Apply power and confirm the pilot light, fan operation, and heating performance.
Follow applicable electrical codes and the manufacturer’s installation instructions.
🏭 Typical Applications
The KH 503-750 is designed for larger industrial control panels, outdoor machinery enclosures, automation cabinets, electrical distribution housings, and process-control equipment that need high-capacity heating with forced airflow.
✅ Selection Notes
Choose this 230V model when calculations indicate a 750W heating requirement. Its taller 8.8-inch housing and 26 CFM airflow should be considered during panel layout.
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