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Siemens 5SY4308-8CC11 — 3-Pole MCB (DIN Rail)

Siemens 5SY4308-8CC11 SENTRON MCB, 3P D 8A 10kA

MPN5SY4308-8CC11

Siemens SENTRON 5SY4308-8CC11, 3-pole miniature circuit breaker, D tripping characteristic, 8 A rated current, 10 kA breaking capacity at 400 V AC, IP20.

Siemens 5SY4308-8CC11 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4308-8CC11 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Suitability for operationMechanical engineering / industry
5SY4308-8CC11 — Protection
ParameterValue
Tripping characteristic (curve)D
Breaking capacity per EN 6089810 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
5SY4308-8CC11 — Electrical
ParameterValue
Rated current (AC)400 V
Rated voltage (AC, multi-phase)440 V
Rated frequency50/60 Hz
5SY4308-8CC11 — Mechanical
ParameterValue
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Combined terminal, topYes
Combined terminal, bottomYes
SealableYes
5SY4308-8CC11 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C

Product details

At 72 V DC the breaking capacity is lower (not listed here), so for DC circuits verify the DC rating separately. The 3-pole version (3P) switches all three phases simultaneously, with no switched neutral. Rated for multi-phase operation up to 440 V AC, it covers standard 400 V three-phase networks with headroom.

Panel integration

Snap-on mounting to DIN rail (quick assembly system). Occupies 3 width units (54 mm) on the rail. Accepts solid or stranded conductors from 0.75 to 35 mm²; screw terminals with a tightening torque of 2.5 to 3.5 N·m. Depth is 76 mm (70 mm installation depth), so verify clearance to the gland plate or enclosure door. Sealable and touch-protected per the listing.

Frequently asked questions

Where can I buy the 5SY4308-8CC11?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ with your quantity and target delivery.

What is the closest functional second-source to the 5SY4308-8CC11?

The 5SY7140-8CC is a sibling in the same SENTRON family but with a different pole count and rating. The 5SY4308-8CC11 is a 3-pole 8 A D-curve; the 5SY7140-8CC is a different variant. Verify the specific pole count, current rating, and breaking capacity before substituting — they are not drop-in replacements without checking the circuit design.

What is the depth of the 5SY4308-8CC11?

The depth is 76 mm (installation depth 70 mm).

What conductor sizes does the 5SY4308-8CC11 accept?

Solid conductors from 0.75 to 35 mm², stranded from 0.75 to 35 mm².

Will the 5SY4308-8CC11 drop into a panel specified around the 5SY7140-8CC?

Both are SENTRON MCBs on the same DIN-rail footprint, but the 5SY4308-8CC11 is a 3-pole 8 A D-curve while the 5SY7140-8CC is a different variant. The physical mounting is compatible, but the electrical ratings (poles, current, trip curve) must match the circuit design — verify before swapping.

MPN
5SY4308-8CC11