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Seifert KH 503-500 500W 230V Fan-Assisted Enclosure Heater, 20 CFM DIN Rail Mount
500W Seifert enclosure heater with 230V input, 20 CFM fan-assisted airflow, self-regulating PTC heat, pilot light, overheat protection, and DIN-rail mounting.
Why Choose the Seifert KH 503-500?
The Seifert KH 503-500 provides 500W of fan-assisted heating for control cabinets that require substantial heat output and steady air circulation. Its 20 CFM fan distributes warm air around enclosure-mounted equipment, helping reduce temperature variation and condensation risk.
The self-regulating PTC resistor responds to surrounding temperature conditions, while a pilot light confirms operation and built-in overheat protection supports reliable performance. The anodized aluminum housing mounts on DIN rail for straightforward integration into industrial panels.
🔥 500W Heating Power
Supports demanding enclosure heating requirements
💨 20 CFM Forced Air
Distributes heat throughout the control cabinet
⚡ 230V Operation
Rated for 230V, 50/60 Hz power
🛡️ Operating Protection
Includes a pilot light and integrated overheat protection
⚠️ Confirm Heater Sizing and Circuit Capacity
Verify that 500W is appropriate for the enclosure and that the 230V, 50/60 Hz circuit can support the listed 2.4A maximum current. Keep the fan inlet and outlet free of wiring, ducting, and nearby components.
📋 High-Capacity Heating for Moisture Control
The KH 503-500 helps maintain a warmer, more uniform cabinet environment during ambient temperature changes. Reducing internal condensation can help protect controls, electronics, terminals, and data-handling equipment from moisture-related damage or failure.
Key Features and Benefits
- 500W fan-assisted enclosure heater
- 230V, 50/60 Hz rated voltage
- 20 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 503-500 |
| Product Type |
Fan-Assisted PTC Enclosure Heater |
| Heating Power at 50°F |
500W |
| Rated Voltage |
230V, 50/60 Hz |
| Maximum Current |
2.4A |
| Fan Airflow |
20 CFM |
| Heating Element |
Self-Regulating PTC Resistor |
| Operating Temperature |
-13°F to 158°F (-25°C to 70°C) |
| Dimensions |
6.5 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. Determine Heating Demand: Confirm that 500W is suitable for the enclosure dimensions, heat loss, and ambient conditions.
2. Verify the Circuit: Confirm a 230V, 50/60 Hz supply and circuit protection suitable for the stated current.
3. Mount for Clear Airflow: Install the heater on DIN rail with open space around the fan inlet and outlet.
4. Connect Conductors: Secure compatible 14 AWG stranded or rigid wire at the three screw terminals.
5. Test the System: Apply power and verify the pilot light, fan airflow, and heat output.
Follow applicable electrical codes and the manufacturer’s installation instructions.
🏭 Typical Applications
This 500W heater is suited for industrial control cabinets, outdoor automation enclosures, process equipment panels, machine-control housings, and electrical boxes that need higher heating capacity and active air movement.
✅ Selection Notes
Choose the KH 503-500 for 230V systems requiring 500W of heat with 20 CFM airflow. Confirm enclosure heat loss and available electrical capacity before selection.
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