STMRT-1250 Dual-Adjustable MCCB
STMRT-1250 dual-adjustable thermal-magnetic MCCB for AC400V distribution, covering 16A to 1250A with 3P/4P configurations and C, S, M and H breaking types.
Order Support
- Typical production lead time: 20 working days
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- Technical documents checked for the requested model
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- OEM and private-label requirements are reviewed case by case
STMRT-1250 dual-adjustable thermal-magnetic MCCB for AC400V distribution, covering 16A to 1250A with 3P/4P configurations and C, S, M and H breaking types.
Overview
The STMRT range combines adjustable thermal and magnetic protection for AC400V distribution. The listed family covers 125A to 1250A frames with 3P and 4P configurations.
Key Features
- Dual-adjustable thermal-magnetic trip unit
- 16A to 1250A across 125A to 1250A frames
- 3P / 4P construction for AC400V
- C, S, M and H breaking types, frame dependent
STMRT-1250 Dual-Adjustable MCCB (1250 Frame)
| Parameter | 1250 |
|---|---|
| Frame size In (A) | 1000A~1250A |
| Number of poles | 3P, 4P |
| Rated insulation voltage Ui (V) | 1000V |
| Rated impulse withstand voltage Uimp (kV) | 8kV |
| Rated operational voltage Ue (V) AC | 400V |
| Breaking capacity code | M, H |
| Ics AC400V M (kA) | 50 |
| Ics AC400V H (kA) | 65 |
| Icu AC400V M (kA) | 65 |
| Icu AC400V H (kA) | 85 |
| Mechanical life (operations) | 2500 |
| Electrical life (operations) | 500 |
| Dimensions 3P L*W*H*H(handle) (mm) | 275.5*210*103*152 |
| Dimensions 4P L*W*H*H(handle) (mm) | 275.5*280*103*152 |
Typical Applications
- Distribution boards
- Motor protection
- Building installations
Frequently Asked Questions
What is adjustable on the STMRT-1250?
It uses a dual-adjustable thermal-magnetic trip unit so overload and short-circuit protection can be coordinated for the application.
What range does this series cover?
The listed frames run from 125A to 1250A, with rated currents from 16A to 1250A, 3P and 4P options, and C, S, M and H breaking types.
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