Buy enough parts to last your build. The smaller chip-scale packaging on MEMS and reeds is changing fast enough that if you do a design in, you might be left "less supported' a year down the road. Qualify and get your parts. . . don't trust sales and marketing guys about what/when the next gen part is, and definitely don't wait for it.
~Dan H, Research & Development, Long Beach, CA
While selection and usage of the electromechanical relays various aspects like
1. Consistent timing in operation.
2. Simple design and ease of understanding of the product by customers.
3. Versatility and compactness of the contacts and the coils.
4. Aesthetics and simplicity for the mounting on the control panel.
~Sankaraiyer Natarajan, General Management, Bangalore, India
Yes, please do not used unbranded electronic / electrical components, using of local component will put your life in danger.
~Engineering, Other, Dubai, United Arab Emirates
Ensure operating times and characteristics are indeed what the situation requires prior to ordering / purchasing.
~Pieter J, Test Engineer, Seymour, 06483
Operating voltage, voltage stress, contact tip design, mechanisms, also the life expectancy.
~YC Ho, Design Engineer, Hong Kong, China
While selecting relays consider the inrush currents also in addition to load currents.
~Lakshmi P, General Management, Kochi,Kerala, India
Watch contact rating [current]. Remember they produce heat in the cabinet.
~Dan W, Builder/Contractor, Kitscoty Alberta, Canada
Prevent under sizing, never use above 2/3 of specified load.
~Cor F, Technical Support, GRand Cayman, Cayman Islands
Buy robust units. Do not be cheap.
~Victor B, Facilities Manager, Chatsworth, Canada
Verify contact ratings are correct
~Engineering, Design, Calgary, Canada
Check the relay specification
~Perera S, Design Engineer, Colombo, Sri Lanka
Check for diode protection
~William H, Research & Development, Heyfield, Australia
Yes for long operation
~Eduardo G, Technical Support, Laguna, Philippines
As in 8.
~Tony Vrancken, Ex design engineer, Leuven, Belgium