Same part, different passport: this is the current-production version, not an NRND or EOL line. The 76 mm depth leaves clearance for wiring in shallow enclosures.
Breaking capacity and coordination reality
For UL and CSA applications, the same part carries 5 kA — a different standard, not a downgrade. Thermal derating is published: full 63 A up to 45 °C, then 61.05 A at 50 °C, 59.03 A at 55 °C. Ambient conditions up to 75 °C are allowed with the appropriate humidity derating per the spec table. For a panel running warm near a drive or transformer, check the 50 °C column before assuming full rating.
The 5SY8163-7 carries IEC 60947-2, UL 1077, and CSA C22.2 No. 235 approvals. It is halogen-free and silicon-free — relevant for clean-room or high-reliability environments where outgassing matters. The sealable design and touch protection features support panel-lockout procedures during maintenance.