RCB class B
S24 Class B RCDs: advanced residual current protection where smooth DC components may appear.
- Class: B class for AC, pulsating DC and smooth DC residual currents.
- Series: S24 range for DIN-rail modular boards.
- Formats: published 2P references rated 25, 40 and 63 A.
- Use: inverters, EV charging, PV and advanced electronics.
S24 Type B RCDs: smooth DC detection and references
Solera S24 Type B RCDs include detection of AC, pulsating DC and smooth DC residual currents. Consider this capability where power electronics may produce leakage beyond the detection scope of Type AC or A. The references published here are two-pole devices rated 25, 40 and 63 A, all with 30 mA sensitivity.
Type B references in this category
| Reference | Commercial designation | Rated current | Sensitivity |
|---|---|---|---|
| S24DB2P2530 | 2P | 25 A | 30 mA |
| S24DB2P4030 | 2P | 40 A | 30 mA |
| S24DB2P6330 | 2P | 63 A | 30 mA |
Selection with inverters and power electronics
For EV charging, photovoltaic systems or drives, the required type depends on the equipment, its integrated protective functions and the complete system. Type B does not establish compatibility with every inverter, charger or drive. Check the equipment instructions and individual reference conditions.
The S24DB2P2530 specification states 25 A, 30 mA, 230 V AC, two modules and 35 mm DIN-rail mounting. These details apply to that reference. Check rated current and coordination with overcurrent protection for every selection.
Frequently asked questions
Is Type B the same as an MCB’s B trip curve?
No. Type B on an RCD describes residual-current detection. An MCB’s B curve concerns a different protective function and does not identify a Type B RCD.
Does every EV charging installation need this Type B reference?
This cannot be decided without reviewing the equipment and protection system. The charger documentation, integrated functions and applicable requirements determine the solution; this category is not a universal compatibility statement.
Does Type B mean high immunity or automatic resetting?
No. Detection type does not automatically establish increased immunity to unwanted tripping or reconnection. Those functions must be expressly declared for the device.