TOUCH-SAFE PTC FAN HEATER
CSF 028 | 250 W, 400 W
The CSF 028 fan heater prevents formation of condensation and provides evenly distributed interior air tempe
rature
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.
> Compact size
> Integrated pre-set thermostat
> Quiet operation
> Heating power adjusts to ambient
temperature
> DIN rail or screw tab mount available
¹ at 68 °F (20 °C) ambient temperature; ² tolerance of ±5 K
Note: Other Switch-off and Switch-on temperatures on request
CSF 028 with DIN clip
CSF 028 with screw mount tabs
TECHNICAL DATA
Heating element PTC resistor - temperature limiting
Surface temperature 250 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 protection built-in temperature limiter
Axial fan, ball bearing service life 40,000 h at 104 °F (+40 °C)
Axial fan, free blowing 32 cfm (54 m³/h) @ AC 120 V; 26 cfm (45 m³/h) @ AC 230 V
Connection 2-pole dual pressure clamp for solid wire AWG 14 max. (2.5mm²),
stranded wire (with wire end ferrule) AWG 16 max. (1.5 mm²)
Housing plastic according to UL 94V-0, black
Mounting clip for 35 mm DIN rail, EN 60715 or screw mount (Ø 5.5 mm),
clamping torque 2 Nm max., washers must be used
Mounting position vertical airflow (air outlet up), horizontal airflow
Dimensions models 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)
Weight 17.6 oz. (500 g)
Operating / Storage temperature -40 to +158 °F (-40 to +70 °C) / -49 to +158 °F (-45 to +70 °C)
Operating / Storage max. 90 %RH (non-condensing)
Protection class / Protection type II (double insulated) / IP20
Approvals UL File No. E150057, VDE
Part No. -
DIN mount
Part No. -
screw tab mount
Operating voltage Heating
capacity¹
Inrush current
max.
Pre-fuse T
(time-delay)
Switch-off temperature² Switch-on temperature²
02821.9-06 02821.9-08 AC 120 V, 50/60 Hz 250 W 6 A 10 A 59 °F (15 °C) 41 °F (5 °C)
02821.9-09 02821.9-11 AC 120 V, 50/60 Hz 250 W 6 A 10 A 77 °F (25 °C) 59 °F (15 °C)
02820.9-06 02820.9-08 AC 120 V, 50/60 Hz 400 W 9 A 10 A 59 °F (15 °C) 41 °F (5 °C)
02820.9-09 02820.9-11 AC 120 V, 50/60 Hz 400 W 9 A 10 A 77 °F (25 °C) 59 °F (15 °C)
02821.0-06 02821.0-08 AC 230 V, 50/60 Hz 250 W 9 A 10 A 59 °F (15 °C) 41 °F (5 °C)
02821.0-09 02821.0-11 AC 230 V, 50/60 Hz 250 W 9 A 10 A 77 °F (25 °C) 59 °F (15 °C)
02820.0-06 02820.0-08 AC 230 V, 50/60 Hz 400 W 15 A 16 A 59 °F (15 °C) 41 °F (5 °C)
02820.0-09 02820.0-11 AC 230 V, 50/60 Hz 400 W 15 A 16 A 77 °F (25 °C) 59 °F (15 °C)
www.stegousa.com08.08.2014 | Specifications are subject to change without notice. Suitability of this product for its intended use and any associated risks must be determined by the end customer/buyer in its final application.
Toll free: 1-888-783-4611 (US & Canada only) · www.stegousa.com
3.35“ (85mm)
3.54“ (90mm)
4.13“ (105mm)
4.45“ (113mm)
4.65“ (118mm)
View: back side
Ambient Temperature
Heating Power (W)
TECHNICAL DRAWINGS
DIN RAIL MOUNT
View: back side
SCREW TAB MOUNT
Wiring example
Fan heater CSF 028
www.stegousa.com08.08.2014 | Specifications are subject to change without notice. Suitability of this product for its intended use and any associated risks must be determined by the end customer/buyer in its final application.
Toll free: 1-888-783-4611 (US & Canada only) · www.stegousa.com