STM7-320 High-Voltage New Energy MCCB
STM7 high-voltage new-energy MCCB for AC380V to AC1140V systems, covering 16A to 1250A across 320A, 630A and 1250A frames with 3P construction.
Order Support
- Typical production lead time: 20 working days
- Free samples — send us your express shipping account
- Technical documents checked for the requested model
- Pre-shipment inspection options can be agreed before ordering
- OEM and private-label requirements are reviewed case by case
STM7 high-voltage new-energy MCCB for AC380V to AC1140V systems, covering 16A to 1250A across 320A, 630A and 1250A frames with 3P construction.
Overview
The STM7 series targets new-energy applications: high-voltage AC models for PV distribution and dedicated DC models for solar strings and battery systems.
Key Features
- DC-rated models for solar and storage
- High-voltage AC versions for PV distribution
- High DC breaking capacity, arc-extinguishing design
- IEC 60947-2 and GB 14048.2 documentation can be checked for the selected model before order
New Energy High-Voltage Circuit Breaker STM7-320
| Parameter | 320 |
|---|---|
| Rated current | 16A~320A |
| Number of poles | 3P |
| Rated operational voltage Ue AC 50-60Hz | AC380/415V,AC690V,AC800V,AC1000V,AC1140V |
| Rated insulation voltage Ui | 1200V |
| Rated impulse withstand voltage Uimp | 12kV |
| Power-frequency withstand voltage (1 min) | 3500V |
| Icu (kA) M AC380/415V | / |
| Icu (kA) M AC690V | 60 |
| Icu (kA) M AC800V | 50 |
| Icu (kA) M AC1000V | 20 |
| Icu (kA) M AC1140V | 12 |
| Icu (kA) H AC380/415V | 100 |
| Icu (kA) H AC690V | 65 |
| Icu (kA) H AC800V | 50 |
| Icu (kA) H AC1000V | 30 |
| Icu (kA) H AC1140V | 20 |
| Ics (kA) | Same as Icu |
| Mechanical life (operations) | 15000 |
| Electrical life (operations) | 5000 / 3000 / 1000 |
| Arc distance (mm) | 50 |
| Overall dimensions W x L x H (mm) | 120*200*103 |
| Instantaneous release | 5In or 10In |
| Reference ambient temperature | 40C |
Typical Applications
- Solar PV systems
- Battery energy storage
- DC distribution
Frequently Asked Questions
Which AC system voltages does STM7 cover?
The listed operating voltages are AC380/415V, AC690V, AC800V, AC1000V and AC1140V for new-energy distribution applications.
What current and frame range is available?
The series covers 16A to 1250A across 320A, 630A and 1250A frames in a 3P configuration. Breaking capacity varies by voltage and M or H version.
Request Quotation
Ask us to confirm price, MOQ, lead time and sample availability for this model.