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Siemens 5SM1344-6 Residual Current Circuit Breaker — 4-Pole, 40A, 30mA, Type A

Siemens 5SM1344-6 4-Pole Residual Current Circuit Breaker

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ManufacturerSiemens

Part number5SM1344-6

Type Residual Current Operated Circuit Breaker (RCCB)

Poles 4

Tripping Characteristic Type A

Rated Current (In) 40A

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Residual Current Protection 4-Pole Configuration Type A Sensitivity (AC & Pulsating DC) 30mA Sensitivity High Current Rating DIN Rail Mountable

Product description

The Siemens 5SM1344-6 is a robust 4-pole residual current operated circuit breaker (RCCB) featuring Type A sensitivity, meaning it protects against both AC and pulsating DC residual currents. With a rated current of 40A, a residual operating current of 30mA, and an operating voltage of 400V AC, this breaker offers comprehensive safety for demanding applications.

This 4-pole, Type A RCCB is essential for three-phase electrical systems in industrial facilities and large commercial buildings. It is particularly suitable for protecting circuits with inductive loads or electronic equipment that may generate pulsating DC fault currents, ensuring a higher level of safety and preventing nuisance tripping.

Stanlo Automation, a veteran-owned surplus distributor, provides reliable industrial automation components like the Siemens 5SM1344-6. We are dedicated to offering quality parts and exceptional service to keep your operations running efficiently.

Technical specifications

Type	Residual Current Operated Circuit Breaker (RCCB)
Poles	4
Tripping Characteristic	Type A
Rated Current (In)	40A
Residual Current (IΔn)	30mA
Rated Voltage (Un)	400V AC
Manufacturer	Siemens

Common applications

Industrial 3-Phase Power

Commercial Buildings

Heavy Machinery Protection

Automation Systems

Motor Circuits

Fire Prevention

Compatible systems

Standard DIN rail mounting for 3-phase systems

Also known as

Siemens 5SM1344-6 RCD 4-Pole 40A 30mA Type A Breaker Siemens 400V Industrial RCCB

Replaces / compatible with

Suitable for upgrading or replacing older Siemens 4-pole RCCBs that require Type A protection for 40A circuits. Verify system compatibility.

Technical note

Expert tip

For applications involving variable frequency drives (VFDs) or other sources of smooth DC leakage, a Type B RCCB is recommended instead of Type A.

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Frequently asked questions

Can the Siemens 5SM1344-6 protect against DC leakage currents?

Yes, the Siemens 5SM1344-6, being a Type A RCCB, can detect and protect against both sinusoidal AC leakage currents and pulsating DC leakage currents. However, it does not provide protection against smooth DC residual currents; for that, a Type B RCCB would be necessary.