 |
 |
 |
|
Seifert KH 503-250 250W 230V Fan-Assisted Enclosure Heater, 20 CFM DIN Rail Mount
250W Seifert fan-assisted control cabinet heater with 230V input, 20 CFM airflow, a self-regulating PTC resistor, pilot light, overheat protection, and DIN-rail mounting.
Why Choose the Seifert KH 503-250?
The Seifert KH 503-250 is a 250W, 230V fan-assisted control cabinet heater built for enclosures that require more heating capacity and continuous warm-air circulation. Its 20 CFM fan distributes heat through the cabinet, helping reduce cold spots and limit moisture buildup around electrical and automation components.
A self-regulating PTC resistor, operating pilot light, and integrated overheat protection support dependable enclosure heating. The anodized aluminum housing and DIN-rail mounting design make the KH 503-250 a practical choice for compact industrial control panels.
🔥 250W Heating Power
Adds dependable heat inside industrial control cabinets
💨 20 CFM Airflow
Circulates warm air to reduce temperature differences inside the enclosure
⚡ 230V Operation
Designed for 230V, 50/60 Hz electrical systems
🛡️ Built-In Protection
Includes a pilot light and integrated overheat protection
⚠️ Verify Voltage, Current, and Airflow Clearance
Confirm a 230V, 50/60 Hz power supply, a maximum current requirement of 1.2A, and sufficient cabinet clearance for unrestricted 20 CFM airflow. This heater is rated IP20 and is intended for installation inside a suitable enclosure.
📋 Fan-Assisted Heating for Condensation Control
The KH 503-250 combines PTC heating with forced air circulation to spread warm air through the cabinet. This helps maintain a minimum internal temperature and reduces the risk of condensation that can affect relays, terminals, drives, controls, and other enclosure-mounted equipment.
Key Features and Benefits
- 250W fan-assisted enclosure heater
- 230V, 50/60 Hz rated voltage
- 20 CFM integrated fan airflow
- Self-regulating PTC resistor
- Pilot light indicates heater operation
- Integrated overheat protection
- Anodized aluminum housing
- DIN-rail mountable design
- IP20 protection rating
- CE and cURus approvals
- RoHS compliant
Technical Specifications
| Brand |
Seifert |
| Model |
KH 503-250 |
| Product Type |
Fan-Assisted PTC Enclosure Heater |
| Heating Power at 50°F |
250W |
| Rated Voltage |
230V, 50/60 Hz |
| Maximum Current |
1.2A |
| Fan Airflow |
20 CFM |
| Heating Element |
Self-Regulating PTC Resistor |
| Operating Temperature |
-13°F to 158°F (-25°C to 70°C) |
| Dimensions |
5.3 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. Confirm Heating Load: Verify that 250W is suitable for the enclosure size, ambient temperature, and desired internal temperature.
2. Verify Power: Confirm access to a 230V, 50/60 Hz supply and wiring sized for the listed current.
3. Mount on DIN Rail: Install the heater where both the air inlet and outlet remain unobstructed.
4. Connect Conductors: Use the three screw terminals with compatible 14 AWG stranded or rigid wire.
5. Test Airflow: Energize the unit and confirm the pilot light, fan operation, and warm-air circulation.
Follow applicable electrical codes and the manufacturer’s installation instructions.
🏭 Typical Applications
This 250W cabinet heater is suited for industrial control panels, outdoor automation enclosures, machinery cabinets, electrical distribution boxes, and other protected housings where condensation control and steady air circulation are required.
✅ Selection Notes
Choose the KH 503-250 for 230V applications requiring 250W of heat and 20 CFM forced airflow. Confirm the enclosure heat-loss requirements before selecting heater capacity.
|
|
|
 |
|
 |
|
