The 5SM2445-6: The 63 A AC rating is the thermal continuous current at 45 °C ambient — at 40 °C it derates to 58.6 A, at 50 °C to 56.7 A, and at 70 °C to 50.4 A. The 100 mA residual current is fixed — not adjustable — and the instantaneous design means no intentional time delay, so it trips on the first half-cycle of a fault.
Siemens 5SM2445-6 SENTRON RCD, 4P, 63 A, 100 mA, Type A
MPN5SM2445-6
Active
Siemens SENTRON, RCD-unit, 4-pole, 63 A AC rated, 100 mA residual current, Type A instantaneous, 50 Hz, 460 V insulation voltage.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Product designation | RCD-unit |
| Product design / construction | instantaneou |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Width in modular units | 3 |
| Maximum | 45 °C |
| Minimum | -25 °C |
| Width | 124 mm |
| Height | 90 mm |
| Depth | 77 mm |
| Installation depth | 70 mm |
Product details
Frequently asked questions
Where can I buy 5SM2445-6 and get current pricing?
The part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time.
What does the 100 mA residual current rating mean for my application?
The 100 mA tripping threshold is fixed and non-adjustable. This is a higher threshold than standard 30 mA RCDs, so it's suited for circuits with higher natural leakage (long cable runs, multiple electronic loads) where nuisance tripping at 30 mA would be a problem. It's still a personnel-protection level in some industrial contexts, but typically 100 mA RCDs are used for equipment protection or fire prevention rather than direct human contact protection.
What panel space does 5SM2445-6 occupy?
It's 3 modular width units wide (124 mm), with a 77 mm depth and 70 mm installation depth. Height is 90 mm. Fits standard DIN-rail enclosures with 3-module spacing.
MPN
5SM2445-6