Doorbell transformers

GTN 3139 Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, recommissioning takes place by briefly disconnecting the primary side from the mains. (At least 1 minute)(Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, art. No. 14936

GTN 3173 Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, restart by briefly disconnecting the primary side from the mains. (Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, art. No. 14936

GTN 50810 Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas where they are active for short periods of time. Unlike our other transformers, this special bell transformer does not have a PTC (positive temperature coefficient) and only has a fail-safe feature. In the event of improper use and rising temperatures, which can ultimately lead to a fire hazard, the transformer's fail-safe protocol kicks in and short-circuits the device to prevent a possible fire, but this renders the transformer unusable and it must be replaced. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, item no. 14936

GTN 3148 Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, restart by briefly disconnecting the primary side from the mains. (Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, art. No. 14936

GTN 3139 S with integrated mains switch Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558.

GTN 3158 Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, restart by briefly disconnecting the primary side from the mains. (Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, art. No. 14936

GTN 3174 Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, restart by briefly disconnecting the primary side from the mains. (Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, item no. 14954

GTN 3173 S with integrated mains switch Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, restart by briefly disconnecting the primary side from the mains. (Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, art. No. 14936

GTN 3182 Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, restart by briefly disconnecting the primary side from the mains. (Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, art. No. 14936

GTN 3148 S with integrated mains switch Our doorbell transformers are specially designed for use with doorbells, doorbells, chimes and door openers in residential areas, where they are active for short periods of time. In contrast, safety transformers are designed for continuous and permanent operation. Grothe's bell and safety transformers are equipped with a PTC (Positive Temperature Coefficient), which protects the transformer on the primary side in the event of short circuits or overloads. If the PTC is triggered due to an overload or short circuit, the transformer is temporarily de-energised for at least 1 minute so that it can then be put back into operation. All our transformers fulfil the strictest environmental protection requirements and have been tested and certified in accordance with EN61558. Note: A higher output voltage occurs at low load or no-load operation! After a short circuit, restart by briefly disconnecting the primary side from the mains. (Exception: GT 50810) Accessories AP mounting set: Includes two cover caps to achieve protection class IP20 and mounting rails and material for surface mounting, art. No. 14936