Siemens 5SM2845-8 RC Unit for 5SY Miniature Circuit Breaker — 4-Pole, Type A, Selective, in 63 A, 1 A, 400 V AC

The Siemens 5SM2845-8 is a SENTRON 5SM2 RC unit — a residual current (RCD) block that clips directly onto a Siemens 5SY miniature circuit breaker. The assembled pair works as a combined residual-current and overcurrent protective device to DIN EN 61009-1, so one device gives both protection against electric shock and earth-fault fire and the line protection of the MCB behind it. This version is Type A: it detects sinusoidal AC residual currents and pulsating DC residual currents, which is the type required for circuits feeding electronic loads. It is 4-pole, rated 63 A at 400 V AC, with a rated residual current of 1 A. It suits 5SY miniature circuit breakers rated 6–63 A. The unit is selective (time-delayed), so it is intended as the upstream group device and will hold in while a downstream instantaneous RCD clears the fault — this is what keeps a single earth fault from tripping the whole board. Device depth is 70 mm. Supplied by cBallast on quote-to-invoice terms; lead time and freight are quoted per RFQ against the destination Incoterm.

Manufacturer part number (MPN)

5SM2845-8

EAN / GTIN

4001869171142

HS code

8536.90

Sales unit

pcs

Voltage

400 V

Setting range

6-63 A

Nominal voltage

400 V

Nominal current

63 A

Rated fault current adjustable

No

Rated fault current

1 A

Delay adjustable

No

Number of poles

4

Leakage current type

A

Surge current capacity

4000 kA

Frequency

50/60 Hz

Rated insulation voltage Ui

460 V

Rated impulse withstand voltage Uimp

5 kV

Connectable conductor cross section solid-core

1.5–25 mm²

Connectable conductor cross section multi-wired

1.5–25 mm²

Anti-nuisance tripping version

Yes

With interlocking device

No

Degree of protection (IP)

IP20

Pollution degree

2

Ambient temperature during operating

-25–45 °C

Country of origin

Czechia

Product family

SENTRON 5SM2 RC unit (add-on residual current device)

Residual current type

Type A (sinusoidal AC and pulsating DC)

Rated residual current (IΔn)

1 A

Tripping characteristic

Selective / time-delayed (S)

Suitable for

Siemens 5SY miniature circuit breakers, 6–63 A

Device depth

70 mm

Standard

DIN EN 61009-1 (combined with MCB)

HS Code

8536.90

• EAN 4001869171142
• SAP 1000037664
• Code 8742668
• MPN 5SM2845-8