Siemens 5SL4132-7RC — 32 A C-curve MCB, 1-pole, 10 kA
The Siemens SENTRON 5SL4132-7RC is a 1-pole miniature circuit breaker rated 32 A with a C tripping characteristic, designed to protect branch circuits in residential and infrastructure panels. Its 10 kA breaking capacity per EN 60898 means it can safely interrupt fault currents up to that level on a 240/415 V AC supply — sufficient for most final subcircuits in commercial and light industrial distribution boards. Occupies a single modular width (18 mm) on DIN rail, with a depth of 76 mm and height of 90 mm. Mounts in any position; IP20 with connected conductors keeps it suitable for enclosed panel installation. Rated for overvoltage category III and pollution degree 2 — standard for fixed-installation switchgear.
Ratings and what they mean for fit
The C-curve trips between 5× and 10× rated current (160–320 A magnetic trip), so it handles moderate inrush from motor starters and small transformers without nuisance tripping, while still protecting against hard shorts. The 32 A continuous rating at 30 °C is the load limit; no thermal derating data is published in this listing, so for elevated ambient the rule of thumb is to apply the standard IEC derating curve for the SENTRON series. Single-phase operation rated at 250 V AC; multi-phase at 440 V AC maximum. DC rating is 72 V maximum — usable for DC control circuits but not a primary DC breaker. Frequency range 50/60 Hz covers standard mains supplies globally. Mechanical service life is 10 000 switching cycles typical — adequate for routine isolation and fault clearing, not intended for frequent load switching as a disconnect.
Lifecycle and sourcing reality
Halogen-free and silicon-free construction — relevant for clean-room or controlled-atmosphere panels where outgassing must be minimized. Sealable design supports tamper-evident lockout for safety isolation.
Panel integration and compliance
Snap-on DIN-rail mount, 1 MWU wide. Installation depth 70 mm behind the mounting surface. Termination accepts standard copper conductors; no special lug kit needed. Designated per EN 61346-2 and IEC 81346-2 as function F (protective device). Suitable for residential buildings and infrastructure per manufacturer classification. Approvals and compliance documentation (RoHS, REACH, UL, IEC) are part of the SENTRON series certification package — verify the specific UL file number for your jurisdiction at quote time.