The 40 A rating is the continuous current it can carry at 40 °C ambient — above that, the allowable current derates in steps down to 17.62 A at 70 °C, so the real-world ampacity depends on your panel's internal temperature. The 300 mA trip threshold makes it suitable for general fault protection rather than personal shock protection (which typically uses 30 mA). The Type A designation means it detects sinusoidal AC residual currents plus pulsating DC residual currents up to 6 mA — common for circuits with single-phase rectifiers, switching power supplies, or variable-speed drives. Mounts on a DIN rail (REG profile) and occupies 4 width units (72 mm) in the enclosure. Supply can enter from top or bottom, which simplifies panel layout. No short-time delay on the trip; it's an instantaneous RCCB, so nuisance tripping from transient surge currents (rated surge withstand is 1 kA) is possible on circuits with heavy switching loads.
Siemens 5SV3644-6XX01 SENTRON RCCB, 40 A, 300 mA, Type A, 4-
Siemens SENTRON 5SV3 series, RCCB, 4-pole, 40 A at 40 °C, 300 mA Type A, 230/400 V AC, 10 kA SCCR, DIN rail mount, instantaneous.
Specifications
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Product designation | RCCB |
| Product design / construction | Instantaneous |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Maximum | 35 mm² |
| Minimum | 0.75 mm² |
| Width | 72 mm |
| Height | 90 mm |
| Depth | 70 mm |
| Installation depth | 70 mm |
| Parameter | Value |
|---|---|
| IP degree of protection | IP20, if the distribution board is installed, with connected conductors |
Product details
Frequently asked questions
What is the 5SV3644-6XX01 used for?
It is a 4-pole residual-current circuit breaker (RCCB) used for earth-fault protection in 230/400 V AC three-phase distribution boards. The 300 mA trip threshold and Type A characteristic suit it for general fault protection on circuits that may contain pulsating DC residual currents — typical in commercial and industrial panels feeding single-phase rectifier loads, switching power supplies, or VFDs.
What are the key ratings of the 5SV3644-6XX01?
Rated current 40 A at 40 °C (derated at higher ambients), rated residual tripping current 300 mA Type A, rated voltage 230/400 V AC, short-circuit current rating 10 kA, surge current withstand 1 kA, 4 poles, instantaneous trip, DIN rail mount, wire range 0.75–35 mm².
Where can I buy the 5SV3644-6XX01?
The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.