Integrated Surge Protective Backup Protector
SPD and backup protection combined in one housing to reduce wiring nodes; power-frequency short-circuit breaking capacity up to 50kA and maximum discharge current up to 100kA.
Overview
Key Features
Integrated Construction
SPD and backup protection in one housing, reducing wiring nodes and failure points
Power-Frequency Protection
Power-frequency short-circuit breaking capacity up to 50kA prevents fire from degraded SPDs
Strong Surge Capacity
Maximum discharge current up to 100kA (8/20μs)
Fast Response
Completes energy discharge within ≤50ns
Smart Maintenance
Local failure indication plus optional remote signalling alarm
Wide Temperature Range
Operating ambient temperature from -40℃ to +80℃
Technical Data
| Rated operating voltage | 230/400V AC |
| Operating frequency | 50/60Hz |
| Maximum continuous operating voltage Uc | 275V / 385V AC |
| Nominal discharge current In | Up to 40kA |
| Maximum discharge current Imax | 20 / 40 / 60 / 80 / 100kA |
| Voltage protection level Up | 1.5kV (Uc=275V) / 1.8kV (Uc=385V) |
| Response time | ≤50ns |
| Power-frequency short-circuit breaking capacity | 15kA / 25kA / 50kA |
| Power-frequency short-circuit operating current | 3A |
| Power-frequency disconnection time | 0.3s |
| Power-frequency current disconnection cycles | 1000 cycles |
| Poles | 1P / 2P / 3P / 4P |
| Maximum conductor cross-section | 6~25mm² |
| Ambient temperature | -40℃ ~ +80℃ |
| Dimensions | 87.5×81.5×18mm (single pole) |
| Mounting | Standard 35mm DIN rail |
Models & Selection
| Parameter | SCSCB15 | SCSCB80 | SCSCB60 | SCSCB40 | SCSCB20 |
|---|---|---|---|---|---|
| Test class | T1 | T2 | T2 | T3 | T3 |
| Maximum impulse current Iimp | 15kA | — | — | — | — |
| Maximum discharge current Imax (8/20μs) | — | 80kA | 60kA | 40kA | 20kA |
| Configured SPD | ≤15kA (10/350μs) | ≤80kA (8/20μs) | ≤60kA (8/20μs) | ≤40kA (8/20μs) | ≤20kA (8/20μs) |
| Power-frequency short-circuit breaking capacity ISC | 50kA | 50kA | 25kA | 25kA | 15kA |
Model naming rule：SCSCB15 SCSCB80 SCSCB60 SCSCB40 SCSCB20
Installation
FAQ
How does an integrated unit differ from a split backup protector?
An integrated unit combines the SPD and the backup protection in the same housing, reducing wiring nodes and panel space. A split arrangement instead connects a separate SPD in series with a separate backup protector.
How do the models map to test classes?
SCSCB15 is T1 with an impulse current of 15kA (10/350μs). SCSCB80, SCSCB60, SCSCB40 and SCSCB20 are T2/T3 classes with discharge currents of 80kA, 60kA, 40kA and 20kA on the 8/20μs waveform.
What is the power-frequency short-circuit breaking capacity?
Breaking capacity is offered in three levels of 15kA, 25kA and 50kA. Operating current is 3A and disconnection time is 0.3s, so the device clears power-frequency short-circuit current after SPD degradation.
What are the mounting and environmental conditions?
Mounting is on a standard 35mm rail, with a single-pole outline of 87.5×81.5×18mm and maximum conductor cross-section of 6~25mm². Operating temperature is -40℃ to +80℃.
How is the product certified and purchased?
Certification is CE / CMA / CNAS accredited laboratory. Price and lead time are quoted per project, and remote signalling is available as an option.