STM6LY Residual Current MCCB
STM6LY adjustable residual-current MCCB combining overload, short-circuit and earth-leakage protection across 125A to 1250A frames, with 2P, 3P and 4P options.
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
STM6LY adjustable residual-current MCCB combining overload, short-circuit and earth-leakage protection across 125A to 1250A frames, with 2P, 3P and 4P options.
Overview
The STM6LY combines overload, short-circuit and residual-current protection for AC400V circuits. Residual-current settings, breaking capacity and pole configurations must be matched to the selected frame.
Key Features
- Thermal-magnetic protection with residual-current protection
- Any four listed residual-current settings adjustable from 50mA to 1000mA
- 16A to 1250A across 125A to 1250A frames
- 2P / 3P / 4P configurations, frame dependent
STM6LY Thermal-Magnetic Adjustable Residual-Current MCCB
| Parameter | 125 | 160 | 250 | 400 | 630 | 800 | 1250 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | S | M | H | C | S | M | H | C | S | M | H | M | H | M | H | M | H | M | H | |
| Frame size In (A) | 16A~125A | 16A~160A | 100A~250A | 250A~400A | 400A~630A | 500A~800A | 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 | |||||||||||||||||||
| Rated residual operating current IΔn (mA) | 50mA, 100mA, 200mA, 300mA, 500mA, 800mA, 1000mA (any four settings adjustable) | |||||||||||||||||||
| Rated residual making and breaking capacity IΔm (kA) | 12.5kA | 12.5kA | 12.5kA | 16.25kA | 16.25kA | 16.25kA | 16.25kA | |||||||||||||
| Breaking capacity code | C | S | M | H | C | S | M | H | C | S | M | H | M | H | M | H | M | H | M | H |
| Rated service short-circuit breaking capacity Ics (kA) AC400V | 3 | 5 | 18 | 35 | 10 | 15 | 25 | 35 | 10 | 18 | 25 | 35 | 35 | 42 | 35 | 50 | 35 | 50 | 35 | 50 |
| Rated ultimate short-circuit breaking capacity Icu (kA) AC400V | 5 | 8 | 25 | 35 | 15 | 20 | 25 | 35 | 15 | 25 | 35 | 50 | 50 | 65 | 50 | 65 | 50 | 65 | 50 | 65 |
| Mechanical life (operations) | 8500 | 8500 | 7000 | 4000 | 4000 | 2500 | 2500 | |||||||||||||
| Electrical life (operations) | 1500 | 1500 | 1000 | 1000 | 1000 | 500 | 500 | |||||||||||||
| Dimensions 2P L*W*H*H(handle) (mm) | 130*50*68*94.5 | 155*60*68(82)*94(108) | / | / | / | / | / | |||||||||||||
| Dimensions 3P L*W*H*H(handle) (mm) | 130*75*68*94.5 | 155*90*68(82)*94(108) | 165*105*68(88)*96(116) | 257*140*103*152 | 257*140*103*152 | 275.5*210*103*152 | 275.5*210*103*152 | |||||||||||||
| Dimensions 4P L*W*H*H(handle) (mm) | 130*100*68*94.5 | 155*120*68(82)*94(108) | 165*140*68(88)*96(116) | 257*184*103*152 | 257*184*103*152 | 275.5*280*103*152 | 275.5*280*103*152 | |||||||||||||
Typical Applications
- Distribution boards
- AC400V circuits requiring residual-current protection
- Industrial and building installations
Frequently Asked Questions
Which residual-current settings are listed for STM6LY?
The series lists 50, 100, 200, 300, 500, 800 and 1000mA values in a four-step adjustable arrangement. The available steps depend on the selected model.
What frame and pole options does STM6LY cover?
Frame sizes run from 125A to 1250A with rated currents from 16A to 1250A, and the series includes 2P, 3P and 4P configurations.
Request Quotation
Ask us to confirm price, MOQ, lead time and sample availability for this model.