Home › Manufacturers › Siemens › 5SM3646-4

Siemens

Siemens 5SM3646-4 4-Pole Residual Current Circuit Breaker

Siemens 4-pole Type B RCD, 63A, 300mA, short-time delayed.

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number5SM3646-4

Poles 4

Type Residual Current Operated Circuit Breaker (RCD)

Characteristic Type B, Short-time delayed

Rated Current (In) 63 A

Get a price for 5SM3646-4

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

4-pole design Type B protection (AC, DC, pulsating currents) Short-time delayed 63A rated current 300mA sensitivity 400V AC operational voltage

Product description

The Siemens 5SM3646-4 is a 4-pole residual current operated circuit breaker (RCD). It is a Type B device, meaning it offers enhanced protection against AC, DC, and pulsating currents. This particular model features a short-time delayed characteristic, providing selective protection in installations with potential leakage currents. Rated for 63 A with a residual current sensitivity of 300 mA and an operating voltage of 400 V AC, it ensures robust safety for electrical circuits.

This RCD is essential for electrical safety in a wide range of applications, including residential, commercial, and industrial settings. Its Type B classification makes it suitable for installations where electronic equipment, such as variable speed drives or medical devices, may introduce residual DC currents. The short-time delay characteristic prevents nuisance tripping while maintaining effective protection against electric shock.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 5SM3646-4. We provide reliable access to high-quality electrical components, helping you secure essential safety devices for your projects at competitive prices. Trust Stanlo for your industrial automation and electrical needs.

Technical specifications

Poles	4
Type	Residual Current Operated Circuit Breaker (RCD)
Characteristic	Type B, Short-time delayed
Rated Current (In)	63 A
Residual Current (IΔn)	300 mA
Rated Voltage (Un)	400 V AC

Common applications

Industrial Installations

Commercial Buildings

Residential Electrical Systems

Protection against electric shock

Installations with electronic loads

Data Centers

Medical Facilities

Compatible systems

Three-phase electrical systems Installations with electronic devices Standard DIN rail mounting systems

Also known as

Siemens 4-pole RCD Type B Earth Leakage Circuit Breaker Siemens 63A RCD

Replaces / compatible with

Suitable for replacing or upgrading existing RCDs in installations requiring Type B protection and selective tripping characteristics.

Technical note

Expert tip

Ensure correct wiring of all four poles to guarantee the intended protection against residual currents, especially in three-phase systems.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What is the advantage of a Type B RCD like the Siemens 5SM3646-4?

A Type B RCD, such as the Siemens 5SM3646-4, offers protection against AC, DC, and pulsating residual currents. This is crucial for modern installations with electronic equipment like variable speed drives or EV chargers, which can generate DC fault currents that Type A RCDs cannot detect.