Safety relays Bistable relays The right relay for every application Our experience. Your safety.

Printed circuit board relays from Dold Our relays are used throughout the world. They have the task of switching loads and galvanically separating electrical circuits. Classical applications, particularly for relays with mechanical forcibly guided contacts, are in the monitoring of emergency stop switches, safety doors or light barriers, for example. They are also essential in railway signalling equipment, in the controllers for passenger and goods elevators as well as in medical equipment. Wherever people and machines must be protected from injury and damage - Dold relays are in use. Dold PCB...

The right relay - for every application Individual, customer-specific safety relays. Features that distinguish our relays: Partially equipped contact sets for increased insulation values, mixed contact equipping with single and double contacts as well as different contact materials for the loads to be switched require only a few minor adjustments for us to adapt our relays to individual, customer-specific requirements. ‫ ٿ‬Galvanic separation between control and load circuits ‫ ٿ‬Switching of loads up to 16 A with low nominal drive power ‫ ٿ‬Up to 8 contacts in one contact set ‫ ٿ‬Low contact...

Safety relays, i.e. relays with mechanically forcibly guided contacts per DIN EN 61810-3, are used wherever people, machines and valuable goods must be protected from injury and damage. One such relay comprises at least one NC contact set and one NO contact set and is constructed such that the NC set and the NO set can never be closed at the same time. For example, if a NO contact fails when trying to open, the associated NC contact cannot close when the power supply is switched off. This behaviour enables simple diagnostics and fault detection when monitoring the forcibly guided feedback contacts....

The safety relays are available in vertical and horizontal designs and offer up to 8 mechanically forcibly guided contacts. With different construction forms, contact materials and also with partially equipped contact sets if required, we offer you maximum flexibility. Types OA 5601, OA 5602 and OA 5603 with 4, 6 or 8 contacts are rated for max. continuous currents up to 10 A. It is also possible to choose between single contacts and double contacts for challenging tasks with the OA 5621 and OA 5622 relays. With Dold you can always switch safe and reliably. You can find more detailed information...

With the extremely flat relay series, Dold sets new standards in the miniaturisation of switching devices. With an overall height of only 10.3 mm, the relays with mechanically forcibly guided contacts are ideally suited for the realisation of compact safety switching devices. Relays with mechanically forcibly guided contacts are used in safety relay modules or controllers amongst other things. The simplicity in the use of safety relays makes them the ideal component for detecting faults due to the forced driving of NC and NO contacts without the need for complex circuitry. In these safety relevant...

Sockets for PCB mounting are available for many safety relays. These enable the safety relays to be quickly replaced during preventative maintenance. In addition, sockets are also available for DIN rail mounting. Typical areas of application are: ► Automation and process technology With Dold you can always switch safe and reliably. You can find more detailed information on our PCB relays at

PCB relays, also known as plug-in/print relays, are used for galvanic separation of circuits as well as for signal adaptation and signal strengthening. Our vertical and horizontal designs enable optimum adaptation to your application. Our PCB relays, with max. continuous currents up to 16 A, are available with one or two contacts, in different installation heights and with different contact materials.

Whilst the contacts of the monostable PCB relays return to their original switch position after the excitation power is switched off, with bistable relays OB 5693, OB 5694 and OB 5623 the switching position is retained after the excitation power is switched off. Energy is thus required only briefly to change the switching position. The bistable relay OB 5623 with its 8 mechanical forcibly guided contacts was developed especially for these applications, which are found for example in railway and signal technology. The relay is available with a manual activation option. It also stands out for its...

Miniature relays If it is necessary to switch heavy currents reliably in a small space and galvanic separation of control and load circuits is also required, there is no better answer than the compact miniature power relays available in DIL (Dual In-Line) form. With the smallest of dimensions, at around 20 mm long and 10 mm wide, they can be inserted into conventional 16-pole IC-sockets. The OW 5691 and OW 5699 relays also have an installation height of just 12.15 mm and can fit almost any situation. The distinguishing features of the wash-tight miniature relays known by the DILAIS brand, are...

Thus the monostable miniature OA 5690 power relays are always used wherever there are high requirements on galvanic separation between control circuits and load circuits. Clearance and creepage distances > 8 mm between coil and contacts as well as low coupling capacitance make this relay the ideal component. With the remanence relay OR 5691, the contacts remain in the working position after a current pulse by using the existing residual magnetism (remanence) until a reduced pulse is applied in the opposite current flow direction. As a result, this relay is used if the self-heating of the coil...

From Black Forest company to globally successful specialist - with sales partners on every continent, we are always there by your side. Frankfurt Karlsruhe From the very beginning it was the goal of the company founded by Emil Dold in 1928, to provide innovative products for the highest levels of safety and customer satisfaction. Dold has steadily and successfully developed and expanded: From a pioneer in relay technology to one of Europe's leading branch representatives in safety and monitoring technology as well as power electronics, with over 400 employees throughout the world. Stuttgart Rottweil...