The 25 A rating at 30 °C is the headline figure, but the derating table tells the real story: at 40 °C the continuous current drops to 23.5 A, at 50 °C to 21.75 A, and at 70 °C to 18.25 A. If this RCBO sits in a crowded distribution board where ambient can reach 50 °C, plan for a 21.75 A continuous load — not 25 A. The short-time delayed K characteristic means it tolerates brief inrush without nuisance tripping, useful for motor-starter or capacitive-load circuits. Mounting position is unrestricted, and the supply can enter from top or bottom — no orientation restrictions in the cabinet.
Siemens SENTRON 5SU1354-6LB25 RCBO 25A Type A 30mA 10kA
MPN5SU1354-6LB25
Active
Siemens SENTRON RCBO, 25 A, Type A, 30 mA, 10 kA (EN 60898) / 20 kA (IEC 60947-2), 2-pole (1P+N), B-curve, short-time delayed K characteristic, 2 MW, halogen-free, IP20.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Number of poles | 2 |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Product designation | RCBO |
| Product design / construction | Short-time delayed G, super resistant K |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Width in modular units | 2 |
| Maximum | 75 °C |
| Minimum | -40 °C |
| Width | 36 mm |
| Height | 90 mm |
| Depth | 77 mm |
| Installation depth | 70 mm |
| Parameter | Value |
|---|---|
| IP degree of protection | IP20, if the distribution board is installed, with connected conductors |
| Parameter | Value |
|---|---|
| Tripping Characteristic Class | B |
Product details
Frequently asked questions
What is the breaking capacity of the 5SU1354-6LB25?
10 kA per EN 60898 and 20 kA per IEC 60947-2. The higher IEC figure applies when the device is used as a circuit breaker under the industrial standard; the EN figure governs domestic/commercial installations.
Where can I buy the 5SU1354-6LB25 and how is it quoted?
Sourced through independent industrial-automation distribution. Quoted to order against an RFQ — availability and current pricing are confirmed at quote time, not listed on a public shelf.
MPN
5SU1354-6LB25