DZ47 Surge Protective Backup Protector
T2 class surge protection with S-suffix signalling models that report failure status remotely; standard 35mm DIN rail clip mounting.
Overview
Key Features
T2 Class Protection
Effectively discharges induced lightning surges and internal grid overvoltages
High Surge Capacity
Nominal discharge current 20kA, maximum 40kA
Low Residual Voltage
Voltage protection level down to 1.5kV with response time ≤50ns
Multiple Configurations
2P/4P and 275V/385V combinations, compatible with AC and DC
Remote Signalling
S-suffix models carry a built-in dry contact for failure status reporting
Easy Rail Mounting
Standard 35mm rail clip design, suited to volume deployment
Technical Data
| Rated operating voltage Ue | 230/400V AC |
| Operating frequency | 50/60Hz |
| Maximum continuous operating voltage Uc | 275V / 385V |
| Nominal discharge current In | 10 / 20 / 30 / 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 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) |
| Remote signalling | Built-in dry contact on S-suffix models |
| Mounting | Standard 35mm DIN rail |
Models & Selection
| Parameter | SDSCB40 | SDSCB20 |
|---|---|---|
| Test class | T3 | T3 |
| Maximum discharge current Imax (8/20μs) | 40kA | 20kA |
| Suitable SPD | ≤40kA (8/20μs) | ≤20kA (8/20μs) |
| Power-frequency short-circuit breaking capacity ISC | 25kA | 15kA |
Model naming rule：SDSCB40 SDSCB20
Installation
FAQ
Which models does the DZ47 backup protector range include?
Two models are offered, SDSCB40 and SDSCB20, with maximum discharge currents of 40kA and 20kA (8/20μs) respectively. They are matched to SPDs rated ≤40kA and ≤20kA.
How does the DZ47 structure differ from the C65 structure?
The housing structure differs: the DZ47 version matches the mounting position and appearance system of DZ47 series distribution boxes. Electrical parameters are given at test class T3, with power-frequency short-circuit breaking capacity of 25kA and 15kA.
What does an S-suffix signalling model provide?
Models with the S suffix contain a built-in dry contact that reports failure status to a monitoring system for remote maintenance. A local failure indication window is still provided on the device.
What are the wiring and dimensional figures?
The device clips onto a standard 35mm rail, with a single-pole outline of 87.5×81.5×18mm and maximum conductor cross-section of 6~25mm². Pole options are 1P/2P/3P/4P.
What are the operating conditions and certification status?
Operating temperature is -40℃ to +80℃ and the device withstands 1000 power-frequency current disconnections. Certification is CE / CMA / CNAS accredited laboratory, and price is Request a quote.