{"id":10765,"date":"2025-11-07T07:31:12","date_gmt":"2025-11-07T06:31:12","guid":{"rendered":"https:\/\/alre.de\/produkte\/frost-protection-thermostat-1-8m-ip40-hysteresis-3k-stb-indoor-setting-outdoor-reset\/"},"modified":"2025-11-07T07:32:22","modified_gmt":"2025-11-07T06:32:22","slug":"frost-protection-thermostat-1-8m-ip40-hysteresis-3k-stb-indoor-setting-outdoor-reset","status":"publish","type":"produkte","link":"https:\/\/alre.de\/en\/produkte\/frost-protection-thermostat-1-8m-ip40-hysteresis-3k-stb-indoor-setting-outdoor-reset\/","title":{"rendered":"Frost protection thermostat, 1.8m, IP40, hysteresis +3K, STB, indoor setting, outdoor reset"},"content":{"rendered":"[vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][vc_column_text]\n
\n
You are here: Plant engineering<\/a> \/ Kapillar-, Feuchtraum- und Frostschutzthermostate, Schaltschrankregler<\/a> \/ Frostschutzthermostate\/-w\u00e4chter<\/a><\/div>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row]\n[vc_row type=”in_container” top_padding=”80″ full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/3″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”]\n

RTKSA-203.000<\/h1>\n

Frost protection thermostat, 1.8m, IP40, hysteresis +3K, STB, indoor setting, outdoor reset<\/h2>\n
<\/div>\n
The RTKSA frost protection controllers have been specially developed for frost protection on the air or water side of hot water heating registers and heat exchangers in ventilation, heating or air conditioning systems. In the event of a sensor break, contact 1-2 is permanently opened and contact 1-4 is permanently closed. Unlocking is no longer possible. Note: Mounting clamps, thermowells and protective coils are not included in the scope of delivery and must be ordered separately. The SWK-2-xxx protective coils can be used for temperature measurement of non-aggressive gases in the duct. Water-side application: The THK-2-xxx thermowells can be used for temperature measurement in non-aggressive fluids and the NTHK-2-xxx thermowells can be used in aggressive fluids.<\/div>\n
[nectar_btn size=”medium” el_class=”alre_product_button” open_new_tab=”true” button_style=”see-through-2″ color_override=”#72b5bc” hover_color_override=”#ee7202″ hover_text_color_override=”#ffffff” icon_family=”none” text=”Assembly instruction” margin_right=”18px” url=”https:\/\/media.alre.de\/eng_GBR\/638119609419463395.PDF”]<\/div>\n[\/vc_column]\n[vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”2\/3″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”]\n
\n
  • [image_with_animation image_url=”https:\/\/media.alre.de\/eng_GBR\/637093338745490825.PNG” alignment=”” border_radius=”none” box_shadow=”none” image_loading=”default” max_width=”100%” max_width_mobile=”default” delay=”0″ animation=”None”]<\/li>\n
  • [image_with_animation image_url=”https:\/\/media.alre.de\/eng_GBR\/637093284332704111.PNG” alignment=”” border_radius=”none” box_shadow=”none” image_loading=”default” max_width=”100%” max_width_mobile=”default” delay=”0″ animation=”None”]<\/li>\n
  • [image_with_animation image_url=”https:\/\/media.alre.de\/eng_GBR\/637093236706122065.PNG” alignment=”” border_radius=”none” box_shadow=”none” image_loading=”default” max_width=”100%” max_width_mobile=”default” delay=”0″ animation=”None”]<\/li>\n
  • [nectar_video_player_self_hosted video_mp4=”https:\/\/media.alre.de\/eng_GBR\/637093213994028788.MP4″ border_radius=”none” box_shadow=”none”]<\/li><\/div>\n
    Art.-Nr.: KA020300<\/h5>\n[\/vc_column][\/vc_row]\n[vc_row type=”full_width_background” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”0″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][tabbed_section style=”minimal” alignment=”left” spacing=”default” tab_color=”Accent-Color” cta_button_style=”accent-color” icon_size=”24″][tab icon_family=”none” title=”Technical Data” id=”1615889093454-3″ tab_id=”1615889093455-1″][vc_row_inner column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” text_align=”left”][vc_column_inner column_padding=”padding-2-percent” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”right” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][vc_column_text]\n

    Technical Data<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Bearing temperature<\/td>\n\u201330\u202f\u2026\u202f80\u00a0\u00b0C<\/td>\n<\/tr>\n
    Capillary length<\/td>\n1.8 m<\/td>\n<\/tr>\n
    Colour<\/td>\nanthracite<\/td>\n<\/tr>\n
    Contact interlocking<\/td>\nYes<\/td>\n<\/tr>\n
    Control range<\/td>\n-10\u202f\u2026\u202f15\u00a0\u00b0C<\/td>\n<\/tr>\n
    Cooling control function<\/td>\nYes<\/td>\n<\/tr>\n
    Device version<\/td>\nsurface-mounted unit<\/td>\n<\/tr>\n
    Diameter sensor element<\/td>\n9.5 mm<\/td>\n<\/tr>\n
    Dimensions (W x H x D)<\/td>\n53\u202fmm x 146,8\u202fmm x 62,9\u202fmm<\/td>\n<\/tr>\n
    Electric connection<\/td>\nPush-in clamp<\/td>\n<\/tr>\n
    Electronic control<\/td>\nNo<\/td>\n<\/tr>\n
    External reset<\/td>\nYes<\/td>\n<\/tr>\n
    External setting<\/td>\nNo<\/td>\n<\/tr>\n
    Function type (systems engineering)<\/td>\nSTB<\/td>\n<\/tr>\n
    Heating control function<\/td>\nYes<\/td>\n<\/tr>\n
    Internal setting<\/td>\nYes<\/td>\n<\/tr>\n
    Length of sensor<\/td>\n98 mm<\/td>\n<\/tr>\n
    Max. air humidity (non-condensing)<\/td>\n95 % r.H.<\/td>\n<\/tr>\n
    Max. Sensor temperature<\/td>\n120 \u00b0C<\/td>\n<\/tr>\n
    Max. switching current<\/td>\n16 (2,5)\u00a0A, 0,25\u00a0A, 2 (0,4)\u00a0A, 0,25\u00a0A<\/td>\n<\/tr>\n
    Max. switching voltage<\/td>\n230\u202fVAC, 50\/60 Hz \/ 230\u202fVDC<\/td>\n<\/tr>\n
    Min. switching current<\/td>\nat 24 V (AC\/DC) min. 100 mA<\/td>\n<\/tr>\n
    Min. switching voltage<\/td>\n24\u202fVAC, 50 Hz \/ 24\u202fVDC<\/td>\n<\/tr>\n
    Mounting\/attachment<\/td>\nwall mounting<\/td>\n<\/tr>\n
    Number of control ranges<\/td>\n1<\/td>\n<\/tr>\n
    Number of outputs<\/td>\n2<\/td>\n<\/tr>\n
    Operation<\/td>\ninternal setpoint adjuster, reset button<\/td>\n<\/tr>\n
    Output signal<\/td>\nswitching<\/td>\n<\/tr>\n
    Potential free switching contact<\/td>\nYes<\/td>\n<\/tr>\n
    Protection class<\/td>\nI<\/td>\n<\/tr>\n
    Safety and EMC<\/td>\nin accordance with DIN EN 60730<\/td>\n<\/tr>\n
    Scale<\/td>\nDegree Celsius<\/td>\n<\/tr>\n
    Sensor element<\/td>\ncapillary tube<\/td>\n<\/tr>\n
    Sensor material<\/td>\nCu<\/td>\n<\/tr>\n
    Switching contact<\/td>\ntwo-way contact<\/td>\n<\/tr>\n
    Switching difference, can be adjusted<\/td>\nNo<\/td>\n<\/tr>\n
    Switching differential<\/td>\nmanual reset according to 3\u00a0K (Heating\/cooling)<\/td>\n<\/tr>\n
    Switching element<\/td>\nmicroswitch<\/td>\n<\/tr>\n
    With explosion protection<\/td>\nNo<\/td>\n<\/tr>\n<\/table>\n
    <\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/tab][tab icon_family=”none” title=”Downloads” id=”1615889093547-8″ tab_id=”1615889093547-7″][vc_row_inner column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” text_align=”left”][vc_column_inner column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][vc_column_text]\n

    Downloads<\/h2>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” text_align=”left”][vc_column_inner column_padding=”padding-2-percent” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”right” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/3″ tablet_width_inherit=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”]\n[fancy_box box_style=”color_box_hover” icon_family=”iconsmind” link_new_tab=”true” color=”accent-color” color_box_hover_overlay_opacity=”default” box_alignment=”left” enable_border=”true” border_radius=”default” image_loading=”default” icon_iconsmind=”iconsmind-Repair” min_height=”200″ link_url=”https:\/\/media.alre.de\/eng_GBR\/638119609419463395.PDF”]\n

    Assembly instruction<\/h4>\n[\/fancy_box][\/vc_column_inner][vc_column_inner column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/3″ tablet_width_inherit=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”]\n[fancy_box box_style=”color_box_hover” icon_family=”iconsmind” link_new_tab=”true” color=”accent-color” color_box_hover_overlay_opacity=”default” box_alignment=”left” enable_border=”true” border_radius=”default” image_loading=”default” icon_iconsmind=”iconsmind-Repair” min_height=”200″ link_url=”https:\/\/media.alre.de\/eng_GBR\/637093214047896788.PDF”]\n

    Sales brochure<\/h4>\n[\/fancy_box][\/vc_column_inner][vc_column_inner column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/3″ tablet_width_inherit=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”]\n[fancy_box box_style=”color_box_hover” icon_family=”iconsmind” link_new_tab=”true” color=”accent-color” color_box_hover_overlay_opacity=”default” box_alignment=”left” enable_border=”true” border_radius=”default” image_loading=”default” icon_iconsmind=”iconsmind-Project” min_height=”200″ link_url=”https:\/\/alre.de\/fileadmin\/media\/deu_DEU\/datasheet\/ALRE_Datenblatt-KA020300.pdf”]\n

    Datasheet<\/h4>\n[\/fancy_box][\/vc_column_inner][vc_column_inner column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/3″ tablet_width_inherit=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”]\n[\/vc_column_inner][vc_column_inner column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/3″ tablet_width_inherit=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][\/vc_column_inner][\/vc_row_inner][\/tab]\n[tab icon_family=”none” title=”More products” id=”1615889093547-8″ tab_id=”1615889093547-7″]\n \n \n
    Photo<\/th>\n Type<\/th>\n Articlenumber<\/th>\n Features<\/th>\n Kind<\/th>\n <\/tr><\/table>\n[\/tab]\n[\/tabbed_section][\/vc_column][\/vc_row]\n
    <\/div>\n[vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_shadow=”none” column_border_radius=”none” column_link_target=”_self” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” tablet_text_alignment=”default” phone_text_alignment=”default” column_border_width=”none” column_border_style=”solid” bg_image_animation=”none”][vc_column_text]\n\t