STM6ZY-250M IoT Smart MCCB
STM6ZY-250M IoT smart MCCB for AC400V networks: adjustable 50A to 1000A ratings, 3P/4P, four-stage protection, metering and communication interfaces.

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STM6ZY-250M IoT smart MCCB for AC400V networks: adjustable 50A to 1000A ratings, 3P/4P, four-stage protection, metering and communication interfaces.
Overview
The STM6ZY family combines adjustable electronic protection, energy metering and multiple communication interfaces for the listed AC400V M/MP frames.
Key Features
- Four-stage electronic protection
- Energy metering with multiple communication interfaces
- 50A to 1000A adjustable range for AC400V
- 3P / 4P construction with response time ≤1s
IoT Smart Circuit Breaker STM6ZY-250M
| Parameter | 250M |
|---|---|
| Rated current In (A) | 125(50~125A) / 250(100~250A) |
| Rated operational voltage Ue (V) | AC400V |
| Rated insulation voltage Ui (V) | 1000 |
| Rated impulse withstand voltage Uimp (kV) | 8 |
| Number of poles | 3P / 4P |
| Icu (kA) AC400V | 50 |
| Ics (kA) AC400V | 35 |
| Selectivity category | B |
| Icw | 5kA/1s |
| Electrical life (operations) | 1000 |
| Mechanical life (operations) maintenance-free | 7000 |
| Mechanical life (operations) maintained | 10000 |
| Fast response time | <= 1s |
| Overall dimensions L x W x H (mm) 3P | 220*105*107 |
| Overall dimensions L x W x H (mm) 4P | 220*140*107 |
Typical Applications
- Smart grids
- Building automation
- Energy management
Frequently Asked Questions
Which smart functions are included in STM6ZY-250M?
The product data lists remote monitoring and control, alarm reporting, trip-event logging, four-stage protection and energy metering.
What electrical range does the STM6ZY family cover?
The listed M/MP frames cover 50A to 1000A at AC400V in 3P and 4P configurations, with Icu of 50kA.
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