Products
Products
ABB Allen-Bradley ADEPT AlfaLaval
All Categories
ALSTOM AMAT B&R BACHMANN BENTLY Bosch Rexroth BAILEY CUTLER-HAMMER DEIF DANAHER Enterasys Extreme EATON ELAU EMERSON EPRO FANUC FOXBORO GE HIMA Honey Well ICSTriplex IFM Kollmorgen SIEMENS Schneider WOODWARD YASKAWA Omron YOKOGAWA MOOG MOTOROLA NI RELIANCE Rexroth SEW TRICONEX Schenider Weidmueller Mitsubishi SICK
home
3UB8133-4HW2

The Siemens 3UB8133-4HW2 is a compact motor protection circuit breaker from the SIRIUS 3UB series, designed for reliable protection of three-phase motors in industrial applications. It combines motor overload protection, short-circuit protection, and switching functionality in a single device.

open

close

TEL：400-887-3214
Mail：jilineasyyi@outlook.com
Q Q：615739355
Parameters
Request a Quote
Return to List
Key Parameters:
Rated Operational Current (Iₑ): 25 A (fixed or adjustable, depending on configuration).

Setting Range for Overload Protection: Typically 12.5–25 A (adjustable via rotary dial).

Short-Circuit Protection (Magnetic Trip):

Trip Threshold: ~12 × Iₑ (e.g., ~300 A for 25 A setting).

Rated Insulation Voltage (Ui): 690 V AC.

Rated Operational Voltage (Ue): 400 V AC (50/60 Hz).

Breaking Capacity (Icn): 50 kA (at 400 V AC, per IEC 60947-2).

Utilization Category: AC-3 (squirrel-cage motors), AC-1 (general resistive loads).

Mechanical Life: ≥ 100,000 cycles.

Electrical Life: ≥ 10,000 cycles (AC-3).

Protection Degree: IP20 (finger-safe terminal protection).

Terminals: Screw-type, suitable for solid or stranded wires (max 35 mm²).

Standards Compliance:

IEC/EN 60947-1, -2, -4-1 (circuit breakers & motor starters).

UL 60947-4-1 (UL listed for North America).

Features:
Integrated overload & short-circuit protection (no need for separate fuses).

Manual ON/OFF switching with rotary handle.

Trip-free mechanism (ensures safety even if held in "ON" position during a fault).

Clear trip indication (visual flag for fault detection).

Compatible with Siemens contactors for modular motor starter assemblies.

Typical Applications:
Protection of three-phase motors (pumps, fans, conveyors).

Machine tool systems, HVAC equipment, and industrial automation.