Touch-safe PTC Fan Heater
CSF 028 | 250 W, 400 W

  • Compact size
  • Integrated pre-set thermostat
  • Quiet operation
  • Heating power adjusts to ambient temperature
  • DIN rail or screw tab mount available

The CSF 028 fan heater prevents formation of condensation and provides evenly distributed interior air temperature in enclosures.  The touch-safe plastic housing and the small size makes it ideal for use in enclosures with a high packing density.  The heater is equipped with a fixed set point thermostat and is easily wired via external pressure clamps. Two different mounting options are available - DIN rail or screw tabs. The robust screw tab mounting is particularly suitable for applications with high vibration.

Heating elementPTC resistor - temperature limiting
Surface temperature250 W: max. 122 °F (50 °C), 400 W: max. 149 °F (65 °C)
each except upper protective grille at 68 °F (20 °C)
ambient temperature
Overheat protectionbuilt-in temperature limiter
Axial fan, ball bearingservice life 40,000 h at 104 °F (40 °C)
Axial fan, free blowing32 cfm (54 m³/h) @ AC 120 V; 26 cfm (45 m³/h) @ AC 230 V
Connection2-pole dual pressure clamp for solid wire AWG 14 max. (2.5 mm²),
stranded wire (with wire end ferrule) AWG 16 max. (1.5 mm²)
Housingplastic according to UL 94V-0, black
Mountingclip for 35 mm DIN rail, EN 60715 or screw mount (Ø 5.5 mm),
clamping torque 2 Nm max., washers must be used
Mounting positionvertical airflow (air outlet up), horizontal airflow
Dimensionsmodels with DIN clip: 4.13 x 3.35 x 4.65" (105 x 85 x 118 mm),
models w/ screw tabs: 4.13 x 4.53 x 4.25" (105 x 115 x 108 mm)
Weight17.6 oz. (500 g)
Operating / Storage temperature-40 to +158 °F (-40 to +70 °C) / -49 to +158 °F (-45 to +70 °C)
Operating/Storage humiditymax. 90 %RH (non-condensing)
Protection class / Protection typeII (double insulated) / IP20
ApprovalsUL File No. E150057, VDE, EAC

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Part No. - DIN mountPart No. - screw tab mountOperating voltageHeating capacity¹Inrush current max.Recommended pre-fuse T (time-delay)Switch-off temperature²Switch-on temperature²
02821.9-0602821.9-08AC 120 V, 50/60 Hz250 W6.0 A10.0 A59 °F (15 °C)41 °F (5 °C)
02821.9-0902821.9-11AC 120 V, 50/60 Hz250 W6.0 A10.0 A77 °F (25 °C)59 °F (15 °C)
02820.9-0602820.9-08AC 120 V, 50/60 Hz400 W9.0 A10.0 A59 °F (15 °C)41 °F (5 °C)
02820.9-0902820.9-11AC 120 V, 50/60 Hz400 W9.0 A10.0 A77 °F (25 °C)59 °F (15 °C)
02821.0-0602821.0-08AC 230 V, 50/60 Hz250 W9.0 A10.0 A59 °F (15 °C)41 °F (5 °C)
02821.0-0902821.0-11AC 230 V, 50/60 Hz250 W9.0 A10.0 A77 °F (25 °C)59 °F (15 °C)
02820.0-0602820.0-08AC 230 V, 50/60 Hz400 W15.0 A16.0 A59 °F (15 °C)41 °F (5 °C)
02820.0-0902820.0-11AC 230 V, 50/60 Hz400 W15.0 A16.0 A77 °F (25 °C)59 °F (15 °C)

¹ at 68 °F (20 °C) ambient temperature; ² tolerance of ±5 K
Note: Other Switch-off and Switch-on temperatures on request

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Accessories

 

Air guide for improved heat distribution

The air guide is an accessory part for use with the fan heater CSF 028. It can easily be clipped onto the protective grille of the fan heater without use of any tools, and diverts the exiting warm air by 45°. This results in an overall improved heat distribution within an enclosure or cabinet. The temperature above the protective grille is reduced by up to 68 °F/20 °C (measured approx. 3.9”/100 mm above protective grille) and may make the use of custom heat ducts obsolete.

 

 

Part No. Dimensions²Plastic1 Packing unitWeight (approx.)
2520173.3 x 3.3 x 0.5“ (85 x 85 x 12 mm)UL 94V-0, black1 piece1.2 oz. (35 g)

² Dimensions when mounted on fan heater.

Air guide Part No. 252017
Fan heater with air guide

Dimensioned Drawings - DIN rail mount

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Screw mount