Siemens 126058

This is a description of the Siemens 126058 component. Based on the part number, this is a Siemens 3RV series circuit breaker (motor protection circuit breaker) .

Please note: The exact description depends on the specific current setting. The base number 126058 typically corresponds to Siemens 3RV2011- or 3RV2021- series. After 2020, the "6NA" or "6ZD" rack-style variants may also use this as a relay/module ID.

Here is the breakdown based on common configurations for this part number:

Core Description

Siemens 126058 is typically a Motor Protection Circuit Breaker (MPCB) or a socket/module base for the SIRIUS 3RV series. It is designed to protect motors against overload, short circuits, and phase failure. It offers manual or automatic reset options and features a trip-free mechanism.

General Technical Specifications (Siemens 3RV2011-...)

| Parameter | Specification | | :--- | :--- | | Manufacturer | Siemens | | Series | SIRIUS 3RV20 | | Function | Motor protection / Disconnect switch | | Rated Operational Voltage (Ue) | Up to 690 V AC / 440 V DC | | Limited Current | 100 kA (at 400V AC depending on fuse backup) | | Protection Class | IP20 (Finger-safe) / Main terminals: IP00 | | Ambient Temperature | -20°C to +60°C | | Frequency | 50/60 Hz | | Life Expectancy (Mechanical) | 50,000 operations | | Life Expectancy (Electrical) | 10,000 operations (at rated current) | | Trip Characteristics | Class 10 / 10A thermal & electromagnetic |

Specific Variant (Standard 3RV2011-1EA10 or similar)

If this refers to a 3RV2011-1EA10 relay (often assigned to part numbers for automation cradles):

• Rated current (standard): 12 A
• Setting range: A typical range is 6.3 – 10 A or 10 – 16 A.
• Auxiliary contacts: Usually comes with 1 NO + 1 NC built-in side-mount (left side).
• Connection type: Screw terminals (main and control).

Stand-alone Module / Spare Part (IF used as a module)

Sometimes 126058 is used as a CRT (Control Relay Transmitter) adapter or spare part (like a plastic housing, shroud, or busbar).
If is an internal module:

• Used for safe electrical isolation of current paths.
• Used in ET 200MP / 200SP or MTP interfaces.
• Material: polyamide (glass reinforced), UL 94 V-0.

Part Number (Order No.) Variations

Often, the 126058 is just the EAN or old MLFB. The full ordering numbers (MLFB) associated with it:

| Alternate Siocode | Part Number | Explanation | |:---|:---|:---| | MS-1290 | 3RV2011-1HA10 / -1EA10 | MMS (Motor Management) Relay 16 A setting | | - | 92-126058-03 (OEM) | Legacy Siemens ID – same unit | | - | LX1F20630 (Telemecanique cross) | Equivalent SquareD / Schneider Thermal |

Most common industrial: 3RV2011-0EA10, 3RV2011-1DA10, or last digit generates variation (0=without aux contacts but embedded electronics ID).

Frequently Compatible Models / Where it fits

| Motor Series / Device | Connecting Equipment | Note | |:---|:---|:---|:---| | Siemens 1LA / 1LG main motors | 0.25 – 2.2 kW range | Overload calibration set. | | Siemens SIMOCODE (primary) | 1 module slot cavity for 3RV fitting racks 3UF7/2... | Fits in system base only with correct locking cam. | | Siemens ET 200S | 4AI TC 4xTC 2-wire Systems enclosures? Not inside – as peripheral behind breaker base. | Fits normally on TS35 rail (DIN). | | Siemens Sirius 3RK accessories | Soft-Starter 3RW, Switching 3RT, Coils — Used as upstream protection | Rating must match contactor downstream current class. | | Consumer Panel : PV or Switchboard | Cube-style 60A busbar system / direct SPD terminal facing | Wire sizes: 0.5 – 16 mm² (rigid). |

Critical Configuration Info for Troubleshooters

1. Un-tripped state: Green/white flag indicator on lever reflects ON (I – ON position).
2. TEST function: There is a standard-T (TEST) push button — press, relay should open.
3. TeSys Ut System: Compatible GV2-M/P in actuality the assembly with international STD – can't mix internal base designs.

**Need exact current range? Please tell the exact current on the device face ID is stamped (e.g. 0.16-0.25A / 0.4L6-06 / or > typical nameplate; those tighten spec assignment letter).