R. STAHL 8581/31-407 125 A Wall Socket
Installation Materials
Product Overview
The R. STAHL 8581/31 series wall sockets, specifically the 8581/31-407 model, are designed for Zone 1/21 hazardous areas, offering a full 125 A AC-3 switching capacity. These sockets feature a high IP66 protection rating against dust and water ingress, ensuring maximum protection in all application positions. Self-cleaning lamella contacts guarantee optimal electrical contact, and the plugs can be easily connected and disconnected in the zero position. The switch-disconnector includes a mechanical locking mechanism with a lockable lever in the 0 and 1 positions for enhanced safety.
Key features include a reliable switch-disconnector with a lockable lever and clear position indication, an integrated auxiliary contact for control and signaling (expandable with plug-in auxiliary contacts), a wide operating temperature range, high mechanical resistance to impact and shock, and perfect protection against liquid and dust penetration. 3D data is available for download.
Technical Specifications
Explosion Protection
| Field of Application | European Union (ATEX), IECEx, China (CQST) |
|---|---|
| Field of Application Note | Other country codes available upon request |
| Application Domain (Zones) | 1, 2, 21, 22 |
| IECEx Gas Certificate | IECEx PTB 06.0034 |
| IECEx Gas Explosion Protection | Ex db eb IIC T6... T5 Gb |
| IECEx Dust Certificate | IECEx PTB 06.0034 |
| IECEx Dust Explosion Protection | Ex tb IIIC T65 °C / T85 °C Db |
| ATEX Gas Certificate | PTB 01 ATEX 1161 |
| ATEX Gas Explosion Protection | II 2 G Ex db eb IIC T6 ... T5 Gb |
| ATEX Dust Certificate | PTB 01 ATEX 1161 |
| ATEX Dust Explosion Protection | II 2 D Ex tb IIIC T65 °C / T85 °C Db |
| Certificates | ATEX (PTB), Brazil (ULB), China (CQST), Korea (KGS), IECEx (PTB), Taiwan (ITRI), ATEX (EGK), China (CCC) |
| Conformity Certificate | ATEX (EGK), China (CCC) |
Electrical Characteristics
| Rated Operational Voltage AC | 480 ... 500 V AC |
|---|---|
| Rated Operational Current | max. 125 A |
| Electrical Service Life | > 2x10⁴ switching cycles |
| Mechanical Service Life | > 2x10⁵ switching cycles |
| Voltage Type | Low voltage |
| Rated Breaking Capacity (AC-3) | 690 V, 125 A |
| Auxiliary Contacts | 2 (1 NO + 1 NC) |
| Frequency Range | 50 / 60 Hz |
| Power Fuse with Thermal Protection | 160 A gG |
| Power Fuse without Thermal Protection | 125 A gG |
Ambient Conditions
| Ambient Temperature | -45 °C ... 60 °C (-49 °F ... +140 °F) |
|---|
Service Temperature Ranges / Connection Cross-Section Assignment
| Temperature Class | Rated Service Current | Connection Cross-Section Assignment (Plug) | Connection Cross-Section Assignment (Socket) |
|---|---|---|---|
| T6 | ≤ +45 °C, 125 A | ≥ 70 mm² | ≥ 50 mm² |
| T5 | ≤ +55 °C, 110 A | ||
| ≤ +60 °C, 100 A | 50 ... 70 mm² | 35 mm² | |
| ≤ +45 °C, 125 A | |||
| ≤ +55 °C, 110 A | |||
| ≤ +40 °C, 100 A | 50 ... 70 mm² | 35 mm² | |
| ≤ +45 °C, 115 A | |||
| ≤ +40 °C, 100 A | 50 ... 70 mm² | 35 mm² |
Note: For temperatures ≤ +40 °C, use cables resistant to heat ≥ 85 °C, e.g., type NSSHÖU.
Mechanical Characteristics
| Degree of Protection IP (IEC 60529) | IP66 |
|---|---|
| Degree of Protection IP (IEC 60079) | IP66 |
| Housing Material | Polyester, glass fiber reinforced |
| Silicone-Free | No |
| Multi-wire Connection | 2 x 35 mm² ... 2 x 50 mm² |
| Multi-wire Connection AWG | 2 x AWG 2 ... 2 x AWG 1/0 |
| Fine-wire Connection | 1 x 50 mm² ... 1 x 150 mm² |
| Fine-wire Connection AWG | 1 x AWG 1/0 ... 1 x AWG 300 kcmil |
| Multi-wire Connection | 1 x 35 mm² ... 1 x 150 mm² |
| Multi-wire Connection AWG | 1 x AWG 2 ... 1 x AWG 300 kcmil |
| Width | 270 mm (10.63 in) |
| Height | 296 mm (11.65 in) |
| Length | 563 mm (22.18 in) |
| Impact Resistance (IEC 60079) | 7 J |
| Impact Resistance (IEC 62262) | IK10 |
Components
Cable Entries
- Entry 1 Model: 8161/7-M63-4828-LT
- Entry 1 Type: Polyamide cable gland
- Introduction 1: M63 x 1.5
- Clamping Range Introduction 1: 28 - 48 mm (1.1 - 1.89 in)
- Metal Cable Entry Possible 1: No
- Entry 2 Model: 8290/3-M63
- Entry 2 Type: Polyamide blanking plug
- Introduction 2: M63 x 1.5
- Metal Cable Entry Possible 2: No
- Entry 3 Model: 8290/3-M25
- Entry 3 Type: Polyamide blanking plug
- Introduction 3: M25
- Metal Cable Entry Possible 3: No
Accessories
| Accessory | Part No. |
|---|---|
| Blanking Plug 8290/3-M25, Plastic, M25 x 1.5, Cable Outer Diameter 7 – 17 mm, Lot Size 50 pieces | 143524 |
| Blanking Plug 8290/3-M63, Plastic, M63 x 1.5, Cable Outer Diameter 28 – 48 mm, Lot Size 1 piece | 143548 |
Auxiliary Contacts
| Type | Part No. |
|---|---|
| 2 NO (8080/1-3), 250 V AC/DC, max. 6 A, 1.5 - 2.5 mm² solid/fine-wired. Switching function depends on mounting location. Synchronized left and right. | 168356 |
| 1 NC + 1 NO (8080/1-1), 250 V AC/DC, max. 6 A, 1.5 - 2.5 mm² solid/fine-wired. Switching function depends on installation bay. Left: delayed (ON), advanced (OFF). Right: synchronized. | 168351 |
| 2 NO (8080/1-4), 250 V AC/DC, max. 6 A, 1.5 - 2.5 mm² solid/fine-wired. Switching function depends on mounting location. Synchronized left and right. | 168353 |
Other Components
| Component | Part No. |
|---|---|
| Plug 8581/12-407, 4-pole, 480 ... 500 V AC, 50 / 60 Hz, 125 A | 277865 |
| Switch Insert 8549/1-31L, Power/Motor Switch | 168776 |
| Ex i Blanking Plug for auxiliary contacts used in Ex i circuits | 168855 |
| Plastic Cable Gland 8161/7-M25-1707, Ex e, Plastic, M25 x 1.5, Cable Outer Diameter 7 – 17 mm, Lot Size 50 pieces | 239157 |
| Plastic Cable Gland 8161/7-M63-4828, Ex e, Plastic, M63 x 1.5, Cable Outer Diameter 28 – 48 mm, Lot Size 1 piece | 239161 |
Spare Parts
| Item | Description | Part No. |
|---|---|---|
| Key for Auxiliary Contact | For removing mounted auxiliary contacts | 201909 |
| Repair Kit for 8581 Series Sockets | Repair Kit 8581 Hinged Cover, Black | 275511 |
Technical Drawings
Dimensional drawings are provided for the wall socket, showing overall dimensions in mm and inches. These drawings are subject to modification.
Note: Figures are for illustrative purposes only.
