The Siemens 5SY43257 is a circuit breaker rated for 25 A and suitable for 230 V/400 V applications, offering reliable protection in electrical systems. This circuit breaker is typically used in residential and commercial installations to prevent overcurrent and short circuits. Siemens is a reputable manufacturer known for high-quality electrical components.
| Type |
Circuit breaker |
| Additional equipment possible |
TRUE |
| Built-in depth |
70mm |
| Compatible with (details) |
SENTRON |
| Concurrently switching neutral conductor |
FALSE |
| Current limiting class |
3 |
| Degree of protection (IP) |
IP20 |
| Depth |
76mm |
| Dim |
(W x H x D) 54 x 90 x 76 mm |
| Factory colour |
Grey |
| Frequency |
50-60MHz |
| Height |
90mm |
| Nominal current |
25A |
| Nominal current - rounded value |
25A |
| Number of pins |
3 |
| Number of poles (total) |
3 |
| Number of protected poles |
3 |
| Operating voltage |
440V |
| Overvoltage category |
3 |
| Pollution degree |
3 |
| Rated Current |
25A |
| Rated impulse withstand voltage Uimp |
4 |
| Rated insulation voltage Ui |
440V |
| Rated short-circuit breaking capacity Icn according to EN 60898 at 230 V |
10kA |
| Rated short-circuit breaking capacity Icn according to EN 60898 at 400 V |
10kA |
| Rated short-circuit breaking capacity Icu according to IEC 60947-2 at 230 V |
20kA |
| Rated short-circuit breaking capacity Icu according to IEC 60947-2 at 400 V |
20kA |
| Rated voltage |
400V |
| Release characteristic |
C |
| Release characteristics |
C |
| RoHS-compliant |
Yes |
| Switch-off capacity |
5kA |
| Voltage type |
AC |
| Weight |
0 |
| Width |
54mm |
| Width in number of modular spacings |
3 |
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