1. Conform to European Safety Standard 2. Internal isolation distance : 0.4mm or more 3. High collector-emitter voltage ( VCEO : 70V) 4. Long creepage distance type 5. Recognized by UL (No. E64380) Approved by VDE ( DIN-VDE83601 ) Approved by BSI ( BS415 No. 7087, BS7002 No. 7409 ) Approved by SEMCO.