The Siemens 5SU1356-7GV16 is a SENTRON RCBO combining overcurrent and residual current protection in a 2-module (36 mm) wide package. Rated 16 A with a C tripping characteristic and Type A residual current sensitivity, it handles moderate inrush from motor starters or lighting ballasts without nuisance trips. Breaking capacity is 6 kA per EN 60898 for domestic panels and 15 kA per IEC 60947-2 for industrial distribution — the higher figure covers fault levels in sub-distribution boards downstream of a transformer.
What the ratings mean for fit
The C-curve trips magnetically at 5–10× In, so a 16 A unit holds through a motor start surge that a B-curve would catch. Type A residual detects pulsating DC superimposed on AC — covers variable-speed drives, LED drivers, and UPS-fed circuits where pure AC-sensitive (Type AC) devices may blind. The 1P+N pole configuration switches the line conductor only; the neutral is switched internally for isolation but not protected against overcurrent. Derating is published: at 40 °C ambient the continuous rating drops to 15.2 A, at 50 °C to 14.4 A, and at 70 °C to 12.32 A — factor this into the load calculation if the panel runs hot. Mounting position is any, and the supply cord can enter from top or bottom — useful for retrofit into existing busbar arrangements. IP20 applies only when the distribution board is installed with connected conductors; the device itself is not rated for exposed or washdown environments.
Lifecycle and sourcing
The 5SU1356-7GV16 carries a current lifecycle status. It is sourced and quoted to order through independent distribution; availability and current pricing are confirmed at quote time against an RFQ.