Forum: Reliability & Maintainability Questions and Answers
Topic: Reliability & Maintainability Questions and AnswersTopic Posted by: Reliability & Maintainability Forum (firstname.lastname@example.org )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998
Original Message:Posted by: Alan Wild (email@example.com )
Organization:Ferranti Technologies Ltd
Date posted: Tue Mar 6 11:18:34 US/Eastern 2001
Subject: Mechanical or Solid State Relays?
Can anyone supply me with information to support a decision on component reliability for a rail application? Which are more reliable, mechanical or solid state relays? Mil-217 analysis (GM environment @ 50 deg C) shows mechanical solonoid types (based on predicted design stresses etc.) to be 0.14 FPMH against Solid state type of 0.35 FPMH. Does anyone out there have any actual recorded results to support or disagree with these predicted results?