Stego CSF 028 Catalog Page

PTC FAN HEATER

18.02.2020 | 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.

PRODUCT CATALOG - STEGO, Inc.

CSF 028 |

CSF 028 with DIN clip

CSF 028 with screw mount tabs

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.

TECHNICAL DATA

Heating element PTC resistor, temperature limiting

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

Connection 2-pole dual pressure clamp for solid wire AWG 14 max. (2.5mm²),

Housing plastic, UL 94V-0, black

Mounting clip for 35 mm DIN rail, EN 60715 or screw mount (Ø 5.5 mm),

Mounting position vertical airflow (air outlet up)

Dimensions models with DIN clip: 4.13 x 3.35 x 4.65" (105 x 85 x 118 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

26 cfm (45 m³/h) @ AC 230 V

stranded wire (with wire end ferrule) AWG 16 max. (1.5 mm²)

clamping torque 2 Nm max., washers must be used

models w/ screw tabs: 4.13 x 4.53 x 4.25" (105 x 115 x 108 mm)

Part No.

DIN mount

02821.9-06 02821.9-08 AC 120 V, 50/60 Hz 250 W 6.0 A 10.0 A 59 °F (15 °C) 41 °F (5 °C) UL File No. E234324 - EAC

02821.9-09 02821.9-11 AC 120 V, 50/60 Hz 250 W 6.0 A 10.0 A 77 °F (25 °C) 59 °F (15 °C) UL File No. E234324 - EAC

02820.9-06 02820.9-08 AC 120 V, 50/60 Hz 400 W 9.0 A 10.0 A 59 °F (15 °C) 41 °F (5 °C) UL File No. E234324 - EAC

02820.9-09 02820.9-11 AC 120 V, 50/60 Hz 400 W 9.0 A 10.0 A 77 °F (25 °C) 59 °F (15 °C) UL File No. E234324 - EAC

02821.0-06 02821.0-08 AC 230 V, 50/60 Hz 250 W 9.0 A 10.0 A 59 °F (15 °C) 41 °F (5 °C) UL VDE EAC

02821.0-09 02821.0-11 AC 230 V, 50/60 Hz 250 W 9.0 A 10.0 A 77 °F (25 °C) 59 °F (15 °C) UL VDE EAC

02820.0-06 02820.0-08 AC 230 V, 50/60 Hz 400 W 15.0 A 16.0 A 59 °F (15 °C) 41 °F (5 °C) UL VDE EAC

02820.0-09 02820.0-11 AC 230 V, 50/60 Hz 400 W 15.0 A 16.0 A 77 °F (25 °C) 59 °F (15 °C) UL VDE EAC

¹ at 68 °F (20 °C) ambient temperature; ² tolerance of ±5 K

Note: Other Switch-off and Switch-on temperatures on request.

Part No.

screw tab mount

Operating

voltage

Heating

capacity¹

Inrush current

max.

Recommended

pre-fuse

T (time-delay)

Switch-off

temperature²

Switch-on

temperature²

Approvals

4.53“ (115mm)

1.77” (45mm)

DIMENSIONED DRAWINGS

18.02.2020 | 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.

HEATING

27

27

DIN RAIL MOUNT

3.35“ (85mm)

3.54“ (90mm)

4.13“ (105mm)

4.45“ (113mm)

4.65“ (118mm)

View: back side

SCREW TAB MOUNT

3.35“ (85mm)

Wiring example

Fan heater CSF 028

3.54“ (90mm)

4.13“ (105mm)

4.06“ (103mm)

4.25“ (108mm)

View: back side

4.06” (103mm)

Heating Power (W)

Ambient Temperature

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 grill 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 grill 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. Dimensions² Plastic 1 Packing unit Weight (approx.)

252017 3.3 x 3.3 x 0.5“ (85 x 85 x 12 mm) UL 94V-0, black 1 piece 1.2 oz. (35 g)

2

Dimensions when mounted on fan heater.

Air guide Part No. 252017

Fan heater with air guide