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Seifert KH 503-751 750W 120V Fan-Assisted Enclosure Heater, 26 CFM DIN Rail Mount
750W Seifert fan-assisted control cabinet heater with 120V input, 26 CFM airflow, self-regulating PTC heat, pilot light, overheat protection, and DIN-rail mounting.
Why Choose the Seifert KH 503-751?
The Seifert KH 503-751 is a 750W, 120V fan-assisted control cabinet heater for larger enclosures and demanding heating applications. Its 26 CFM fan circulates warm air throughout the cabinet, helping reduce temperature differences and the moisture buildup associated with changing ambient conditions.
The self-regulating PTC resistor responds to surrounding temperature, while the pilot light provides operating status and integrated overheat protection supports dependable use. An anodized aluminum housing and DIN-rail mounting design simplify installation in industrial panels.
🔥 750W Heating Power
Meets high-capacity enclosure heating needs
💨 26 CFM Airflow
Moves warm air through larger control cabinets
⚡ 120V Operation
Designed for 120V, 50/60 Hz systems
🌡️ Thermostat Compatible
Can be controlled according to enclosure temperature
⚠️ Verify Current Draw and Available Panel Space
Confirm that the 120V, 50/60 Hz circuit supports the listed 7.2A maximum current and that 750W is appropriate for the enclosure heat load. Allow adequate clearance around the fan and the 8.8-inch-high housing.
📋 High-Output Heating Helps Prevent Condensation
The KH 503-751 combines 750W of PTC heating with 26 CFM airflow to maintain a more uniform internal temperature. This helps reduce humidity and condensation that can lead to equipment damage, data loss, or performance problems.
Key Features and Benefits
- 750W fan-assisted control cabinet heater
- 120V, 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 503-751 |
| Product Type |
Fan-Assisted PTC Enclosure Heater |
| Heating Power at 50°F |
750W |
| Rated Voltage |
120V, 50/60 Hz |
| Maximum Current |
7.2A |
| 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. Verify Heating Capacity: Confirm that the application requires 750W based on enclosure size, heat loss, ambient temperature, and insulation.
2. Check the Circuit: Confirm a 120V, 50/60 Hz supply with sufficient current capacity and suitable protection.
3. Plan Panel Space: Allow room for the 8.8-inch-high heater and unobstructed 26 CFM airflow.
4. Connect Conductors: Use compatible 14 AWG stranded or rigid wire at the three screw terminals.
5. Test Operation: Verify the pilot light, fan, and heat output after applying power.
Follow applicable electrical codes and the manufacturer’s installation instructions.
🏭 Typical Applications
This high-output heater is suited for larger control panels, outdoor automation enclosures, machinery cabinets, electrical distribution boxes, and process-control housings that require 120V power and strong warm-air circulation.
✅ Selection Notes
Select the KH 503-751 when a 120V system requires 750W of enclosure heating. Confirm both the 7.2A current requirement and the available mounting space during design.
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