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Siemens 5SY7306-7 — 3-Pole MCB (DIN Rail)

Siemens SENTRON 5SY7306-7 MCB, 3P C-Char, 15/40 kA, 76 mm de

MPN5SY7306-7
Active

Siemens SENTRON 5SY7306-7, 3-pole miniature circuit breaker, C characteristic, 15 kA (EN 60898) / 40 kA (IEC 60947-2) breaking capacity, 400 VAC, 76 mm depth, IP20.

$49.53Ref. price · indicative, final on quote
Siemens 5SY7306-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7306-7 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY7306-7 — Protection
ParameterValue
Tripping characteristic (curve)C
Breaking capacity per EN 6089815 kA
Breaking capacity per IEC 60947-240 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree3
5SY7306-7 — Electrical
ParameterValue
Rated voltage (AC, multi-phase)440 V
Voltage type (AC/DC)AC
Supply frequency range50/60 Hz
Power loss per pole at rated current (AC, hot)1.6 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY7306-7 — Mechanical
ParameterValue
Modular width units3
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
Combined terminal, topYes
Combined terminal, bottomYes
Fastening methodQuick assembly system
SealableYes
Accepts supplementary devicesYes
5SY7306-7 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
Vibration resistance (IEC 60068-2-6)±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz

Product details

Panel fit and breaking capacity — what the ratings mean

The C-curve means it's designed for moderate inrush loads — typical for motor-starter, lighting, and general industrial circuits where the start-up surge is higher than a resistive load but not extreme. For DC circuits, it's rated 15 kA at 60 V (72 V max operating voltage), so it also works in DC sub-distribution or control power feeds.

Environmental and installation notes

Rated for ambient temperatures from -40 °C to 75 °C, with humidity derating above 55 °C (95% RH at 55 °C, tapering to 35% at 75 °C) — so it's suitable for unheated enclosures in cold climates or warm cabinets near other heat sources.

Regulatory coverage

Dual-certified under IEC/EN 60898-1 (household-type MCB) and IEC/EN 60947-2 (industrial circuit-breaker standard), plus UL 1077 and CSA C22.2 No. 235 for North American supplementary protection — the 5 kA UL/CSA rating is the applicable limit for those markets. Overvoltage category III (distribution-level) and energy limitation class 3 (current-limiting, fast arc extinction). Sealable terminals available for lockout/tagout compliance.

Frequently asked questions

Where can I buy 5SY7306-7 and what is the lead time?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or lead-time number can be stated here, but we can turn a quote quickly.

Will 5SY7306-7 fit a panel designed for 5SY4140-7?

No — the 5SY4140-7 is a 1-pole unit (1 modular width, ~18 mm), while the 5SY7306-7 is 3-pole (3 modular widths, 54 mm). The depth (76 mm) and height (90 mm) are similar, but the width difference means the DIN-rail space and busbar arrangement are incompatible without re-termination.

What compliance documentation does Siemens provide for 5SY7306-7?

The part carries IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, and CSA C22.2 No. 235 certifications. It is halogen-free and silicon-free. Standard Siemens declarations for RoHS and REACH are available on request — the product is designed for global industrial markets and meets the applicable EU and North American regulatory requirements.

MPN
5SY7306-7