Siemens SIRIUS 3RB2143-4EX1 solid-state overload relay, 3-pole, adjustable trip classes 5E/10E/20E/30E, ATEX Ex II (2) GD, spring-loaded terminals, 124 x 70 x 106 mm.
| Parameter | Value |
|---|---|
| Product brand name | SIRIUS |
| Product designation | solid-state overload relay |
| Combinable contactor sizes | S3 |
| Reference code (IEC 81346-2) | F |
| Parameter | Value |
|---|---|
| Overload current setting range | 25 ... 100 A |
| Trip class | CLASS 5E, 10E, 20E and 30E adjustable |
| Parameter | Value |
|---|---|
| Poles (main circuit) | 3 |
| Rated insulation voltage (AC, pollution degree 3) | 1 000 V |
| Rated surge withstand voltage | 8 kV |
| Main current circuit | straight-through transformers |
| Power loss at rated current (hot) | 0.05 W |
| Per pole | 0.02 W |
| Parameter | Value |
|---|---|
| Auxiliary contacts: NO | 1 |
| Auxiliary contacts: NC | 1 |
| Auxiliary contacts: CO (changeover) | 0 |
| Auxiliary switch short-circuit protection (required fuse) | fuse gL/gG: 6 A |
| Switching current at 24 V | 2 A |
| Switching current at 60 V | 0.55 A |
| Switching current at 110 V | 0.3 A |
| Switching current at 120 V | 4 A |
| Switching current at 125 V | 0.3 A |
| Switching current at 220 V | 0.11 A |
| Switching current at 230 V | 3 A |
| Parameter | Value |
|---|---|
| Mounting / fastening method | stand-alone installation |
| Mounting position | any |
| Auxiliary/control circuit connection type | spring-loaded terminals |
| Removable aux./control terminal | Yes |
| Conductor cross-section: solid | 2x (0.25 ... 1.5 mm²) |
| Conductor cross-section: finely stranded with ferrule | 2x (0.25 ... 1.5 mm²) |
| Conductor range (AWG), auxiliary contacts | 2x (24 ... 16) |
| Parameter | Value |
|---|---|
| Operating temperature | -25 ... +60 °C |
| Storage temperature | -40 ... +80 °C |
| Transport temperature | -40 ... +80 °C |
| Relative humidity, operating | 100 % |
| Max. installation altitude | 2 000 m |
| Shock resistance | 15g / 11 ms |
| Parameter | Value |
|---|---|
| Width | 70 mm |
| Height | 106 mm |
| Depth | 124 mm |
| Parameter | Value |
|---|---|
| Type Of Protection | PTB 06 ATEX 3001 Ex II (2) GD |
Certified PTB 06 ATEX 3001 Ex II (2) GD, this relay is approved for installation in potentially explosive atmospheres — Zone 2 gas and Zone 22 dust environments — as part of an Ex-certified motor starter combination. The housing is rated for 100 % relative humidity during operation and a temperature range of -25 to +60 °C operating, -40 to +80 °C storage/transport.
The 3RB2143-4EX1 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
The relay carries ATEX certification PTB 06 ATEX 3001 Ex II (2) GD for explosive atmospheres, RoHS compliance with a substance prohibitance date of 07/01/2006, and EMC immunity per IEC 61000-4-4 severity degree 3.
The 3RB2143-4EX1 is a 3-pole solid-state overload relay with adjustable trip classes 5E, 10E, 20E, and 30E. It has a surge voltage resistance of 8 kV, operates from -25 to +60 °C, and accepts 2x (0.25... 1.5 mm²) wire on spring-loaded terminals.
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