 |
 |
 |
|
Seifert KH 503-401 400W 120V Fan-Assisted Enclosure Heater, 20 CFM DIN Rail Mount
400W Seifert fan-assisted control cabinet heater with 120V input, 20 CFM airflow, self-regulating PTC heat, pilot light, overheat protection, and DIN-rail mounting.
Why Choose the Seifert KH 503-401?
The Seifert KH 503-401 is a 400W, 120V fan-assisted control cabinet heater for enclosures that need higher heating output and continuous warm-air circulation. Its 20 CFM fan helps distribute heat throughout the cabinet, reducing cold areas where humidity and condensation may develop.
The self-regulating PTC resistor adapts heating performance to the surrounding temperature. A pilot light indicates when the heater is operating, and integrated overheat protection supports dependable use in industrial control panels and automation enclosures.
🔥 400W Heating Power
Provides higher-capacity heating for industrial enclosures
💨 20 CFM Airflow
Moves warm air across cabinet-mounted equipment
⚡ 120V Operation
Designed for common 120V, 50/60 Hz systems
🌡️ Thermostat Compatible
Can be paired with a thermostat for temperature control
⚠️ Verify Electrical Load and Airflow
Confirm a 120V, 50/60 Hz source, a maximum current requirement of 3.8A, and enough free space for the integrated fan to circulate air. The IP20 rating requires installation inside a suitable enclosure.
📋 Maintain a Safer Minimum Cabinet Temperature
By combining 400W of PTC heat with forced airflow, the KH 503-401 helps maintain a stable minimum temperature inside the enclosure. This reduces condensation risk and supports reliable operation in cabinets exposed to changing ambient conditions.
Key Features and Benefits
- 400W fan-assisted enclosure heater
- 120V, 50/60 Hz rated voltage
- 20 CFM fan airflow
- Self-regulating PTC resistor
- Pilot light for operating indication
- Integrated overheat protection
- Anodized aluminum housing
- DIN-rail mountable
- Thermostat compatible
- IP20 protection rating
- CE and cURus approvals
- RoHS compliant
Technical Specifications
| Brand |
Seifert |
| Model |
KH 503-401 |
| Product Type |
Fan-Assisted PTC Enclosure Heater |
| Heating Power at 50°F |
400W |
| Rated Voltage |
120V, 50/60 Hz |
| Maximum Current |
3.8A |
| 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. Confirm Required Output: Check that 400W meets the enclosure heating requirement without oversizing the application.
2. Confirm Supply: Verify a 120V, 50/60 Hz power source and protection suitable for the listed current.
3. Mount for Air Movement: Install the heater on DIN rail with clear inlet and outlet airflow paths.
4. Wire the Terminals: Use compatible 14 AWG stranded or rigid conductors at the three screw terminals.
5. Check Operation: Confirm the pilot light, fan, and heating output after energizing the circuit.
Follow applicable electrical codes and the manufacturer’s installation instructions.
🏭 Typical Applications
The KH 503-401 fits industrial control panels, packaging and processing machinery, outdoor automation enclosures, electrical distribution cabinets, and equipment housings that require 120V heating and forced air circulation.
✅ Selection Notes
Select this heater for 120V applications that require 400W of heating power. Thermostat control can be used when the enclosure temperature should be regulated automatically.
|
|
|
 |
|
 |
|
