The AMRA and AMRA-MTI product lines, both of which are manufactured in our factory in Macherio (Italy), allow our customers to choose from a wide range of solutions, from 2-contact relays to multi-pole devices with 20 contacts, and from monostable, bistable, fast (trip) and time-delay models, to special relays.
Part of the product range is designed for applications in rolling stock, in compliance with railway sector standards.
Over the years our relays have been approved by major operators in railway transport and in the electricity production and transportation sector.

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AMRA and AMRA-MTI lines offer shared characteristics in terms of performance, reliability and life expectancy. The various products are employed in roles demanding high levels of reliability, also in harsh operating conditions.

• High breaking capacity, to work directly with highly inductive loads;
• High isolation between power circuit and contacts, guaranteeing elevated galvanic separation;
• Self-cleaning knurled contacts available for a large number of models;
• Fast switching times for trip relays;
• Availability of models with forcibly guided contacts in compliance with EN 61810-3 (previously EN 50205);
• High immunity to electromagnetic interference;
• Wide range of power input voltages, customizable on request;
• Easy to install and maintenance free;
• Wide choice of sockets for fitting (front panel mounting, rear panel mounting, with screw fastening, or spring terminals, etc.).

The choice of relay calls initially for correct interpretation of the functional specifications and the environmental and operating constraints within which the relays must function.

RELAYS WITH FORCIBLY GUIDED CONTACTS,DESIGNED FOR SAFETY APPLICATIONS

Relays with forcibly guided contacts (also known as mechanically linked contacts) or weld-no-transfer, are designed ensure that, in the event of a fault, the normally open poles (NO) of each contact do not assume the same state as the normally closed pole (NC).

• when the relay is powered, if a NC contact fails to open, the remaining NO contacts do not close and further they keep a minimum distance between open elements ≥0.5 mm
• when the relay is disconnected, if a NO contact fails to open, the remaining NC contacts do not close, and further they keep a minimum distance between the open elements ≥0.5 mm

All AMRA relays with forcibly guided contacts (also known as mechanically guided contacts) have changeover contacts and both the closing and opening circuit of a given relay can be considered compliant with the requirements of the EN 61810-3 type A standard.
Unweldable contacts, represent an indispensable feature for safety applications where there is the need to ensure that (NO) contacts do not assume the same state of (NC) contacts and therefore have the certainty of the possible re-reading.