Skip to main content
Siemens 5SY5420-6 — 4-Pole MCB (DIN Rail)

Siemens 5SY5420-6 SENTRON MCB, 4P B-Curve, 10 kA, 400 V AC

MPN5SY5420-6
Active

Siemens SENTRON 5SY5420-6, 4-pole miniature circuit breaker, B-curve, 10 kA interrupting capacity per IEC/EN 60898-2, 400 V AC, UL1077 listed.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5420-6 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityuniversal current
5SY5420-6 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated voltage, AC (multi-phase)440 V
5SY5420-6 — Protection
ParameterValue
Tripping characteristic (trip curve)B
Energy limitation class3
Overvoltage categoryII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
5SY5420-6 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Fastening / mounting methodQuick assembly system
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SY5420-6 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
5SY5420-6 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)2.2 W

Product details

It carries a 10 kA interrupting capacity per IEC/EN 60898-2 at 400 V AC, and a 15 kA rating per IEC 60947-2 at DC — the higher DC figure matters for panels with battery-backed or rectified supplies, where fault currents can be sustained longer than in AC circuits.

Panel fit and environmental range

Width is 72 mm (4 modular units), depth 76 mm, height 90 mm. Operating temperature spans -40 °C to 75 °C, with humidity derating above 55 °C: max 95% RH at 55 °C, dropping to 35% at 75 °C. That -40 °C floor means it's usable in unheated outdoor cabinets or cold-storage environments without a heater.

Listed to IEC/EN 60898-2 and UL1077, with overvoltage category II and pollution degree 2.

Frequently asked questions

How do I get current pricing and availability for 5SY5420-6?

Submit an RFQ through the storefront. The part is sourced to order via independent distribution; availability and current pricing are confirmed at quote time — no stock count or price is published here.

What is 5SY5420-6's listed depth?

The depth is 76 mm, with an installation depth of 70 mm. Width is 72 mm (4 modular units), height 90 mm.

What compliance documentation does this brand provide for 5SY5420-6?

The MCB carries IEC/EN 60898-2 and UL1077 listings, overvoltage category II, pollution degree 2, and is halogen-free and silicon-free. Standard RoHS/REACH declarations are available from the manufacturer.

MPN
5SY5420-6