The 5SM3446-6LA: The 63 A rated current and 100 mA residual trip make this RCCB a fit for sub-distribution boards feeding mixed loads — lighting, small motors, and general socket circuits — where a 30 mA trip would cause nuisance tripping from leakage in long cable runs or equipment with inherent earth leakage. Type A detection covers pulsating DC fault currents (common in single-phase rectifier loads like VFDs and switching power supplies) in addition to sinusoidal AC faults. Overvoltage category III confirms it is rated for fixed-installation distribution panels, not just downstream equipment. Mounts on a DIN rail (REG profile), occupies 4 width units (about 72 mm), and accepts solid or stranded conductors from 1.5 to 25 mm². The screw terminals call for 2.5 to 3 N·m torque.
Siemens 5SM3446-6LA SENTRON RCCB, 4P, 63 A, 100 mA, Type A
Siemens SENTRON 5SM3 series RCCB, 4-pole, Type A, 63 A rated current, 100 mA residual trip, 400 V AC, 10 kA short-circuit current rating, DIN rail mount, with thermal overload protection.
Specifications
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Product designation | RCCB |
| Product design / construction | Instantaneous |
| Parameter | Value |
|---|---|
| Mounting position | any |
| 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 are the key ratings of the 5SM3446-6LA?
Rated 63 A at 400 V AC, 100 mA residual trip current, Type A fault-current detection, 10 kA short-circuit current rating, 4 poles, DIN rail mount, with thermal overload protection.
Where can I buy the 5SM3446-6LA?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
What compliance documentation is available for the 5SM3446-6LA?
The product carries the SENTRON brand and is designed to IEC/EN standards for RCCBs. Specific RoHS, REACH, and UL documentation should be requested at quote time — the evidence does not list those certifications explicitly for this order code.