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Siemens 5SY4405-8CC11 — Miniature Circuit Breakers (MCB)

Siemens 5SY4405-8CC11 SENTRON MCB, 4P D-curve 0.5A, 10kA

MPN5SY4405-8CC11

Siemens SENTRON 5SY4405-8CC11, 4-pole miniature circuit breaker, D tripping characteristic, 0.5 A rated at 35 °C, 10 kA breaking capacity per EN 60898, 4 modular width units.

Siemens 5SY4405-8CC11 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SY4405-8CC11 — Ratings
ParameterValue
Overvoltage categoryIII
5SY4405-8CC11 — Mechanical
ParameterValue
Width72 mm
Height90 mm
Depth76 mm

Product details

The 0.5 A rating holds at 35 °C. At 40 °C it derates to 0.46 A; at 50 °C, 0.41 A; at 60 °C, 0.36 A. If your panel ambient runs 50 °C — common in a packed enclosure near a drive — the breaker's actual continuous current capacity is 0.41 A, not the nominal 0.5 A. Size your load accordingly or the bimetal strip will nuisance-trip on a warm afternoon.

Mounting position is any orientation. The combined terminal design on top and bottom accepts supply from either end — no need to flip the breaker for line/load orientation.

Frequently asked questions

What is the breaking capacity of 5SY4405-8CC11?

It is rated 10 kA according to EN 60898. This is the maximum prospective fault current it can safely interrupt at the rated voltage.

What does the D tripping characteristic mean for this breaker?

The D curve trips instantaneously at 10–14 times the rated current. It is designed for loads with high inrush, such as small transformers, solenoid valves, or motor starters, where a B or C curve would nuisance-trip on startup.

How do I get current pricing and availability for 5SY4405-8CC11?

Pricing and stock levels are confirmed at quote time. Submit an RFQ through the storefront; the sourcing desk will return current availability and a firm price for your quantity.

Will 5SY4405-8CC11 drop into a panel specified around 5SY4140-7?

Both are 4-pole SENTRON MCBs with the same 4 MW footprint (72 mm wide,), so the mechanical fit is identical. The difference is the tripping curve: 5SY4405-8CC11 is a D curve, while 5SY4140-7 is a different characteristic. Verify the load's inrush profile before swapping — a D curve on a resistive load may not provide adequate overcurrent protection.

MPN
5SY4405-8CC11