STAHL 8579A Wall Mount Socket

Installation Equipment
Wall-mounting socket 63 A
8579/31-407 Art. No. 270906
- Reliable load disconnect switch with easily visible, lockable handle and switching position display
- An integrated auxiliary contact for control and signalling purposes, can optionally be enhanced with pluggable, easily retrofittable Ex e or Ex i auxiliary contacts
- Wide temperature range for use
- High mechanical impact and shock resistance
- Perfect protection against the ingress of liquids and dust
- 3D data available to download from the website
WebCode 8579A
R. STAHL Series 8579/ 31 sockets for Zone 1/ 21 in a 4- and 5- pole version have full AC- 3 switching capacity up to 63 A. The high degree of protection IP66 guarantees the highest level of protec-tion against the penetration of dust and water in any application position. Self- cleaning lamellar contacts provide optimum contact and the plugs can be inserted and removed in the zero position quickly and easily. The load disconnect switch, with mechanical locking device and a handle that can be locked in the 0 or I position, is an additional safety feature.
Technical Data
| Explosion Protection | |
| Scope of validity | European Union (ATEX) IECEx China (CQST) |
| Application range (zones) | 1 2 21 22 |
| IECEX gas certificate | IECEx PTB 06.0020 |
| IECEx gas explosion protection | Ex db eb IIC T6 … T5 Gb |
| IECEX dust certificate | IECEx PTB 06.0020 |
| IECEx dust explosion protection | Ex tb IIIC T60 °C / T75 °C Db |
| ATEX gas certificate | PTB 01 ATEX 1150 |
| ATEX gas explosion protection | E II 2 G Ex db eb IIC T6 … T5 Gb |
| ATEX dust certificate | PTB 01 ATEX 1150 |
| ATEX dust explosion protection | E II 2 D Ex tb IIIC T60 °C / T75 °C Db |
| Certificates | ATEX (PTB), Brazil (ULB), China (CQST), EAC (ENDCE), IECEx (PTB), Korea (KGS), Taiwan (ITRI) |
| Explosion protection note | Product label may vary. Series devices have certification according to ATEX and IECEx. |
| Electrical Data | |
| Rated operational voltage AC | 480 to 500 V AC |
| Rated operational current | max. 63 A |
| Electrical service life | > 2×104 switching cycles |
| Mechanical service life | > 2×104 switching cycles |
| Type of voltage | Low voltage |
| Electrical Data | |
| Switching capacity main contacts | AC-3 690 V, 63 A 18.5 kW: 220 / 230 / 240 V 30 kW: 380 / 400 / 415 V 37 kW: 500 V 55 kW: 690 V |
| Auxiliary contacts | 2 (1 NO + 1 NC) |
| Frequency range | 50 / 60 Hz |
| Device Specific Data | |
| Back-up fuse with thermal protection | 80 A gG |
| Back-up fuse without thermal protection | 63 A gG |
| Ambient Conditions | |
| Ambient temperature | -45 °C … +40 °C (T6) -45 °C … +55 °C (T5) |
| Ambient temperature | -49 °F … +104 °F (T60 °C) -49 °F … +131 °F (T75 °C) |
| Mechanical Data | |
| IP degree of protection (IEC 60529) | IP66 |
| IP degree of protection (IEC 60079) | IP66 |
| Enclosure material | Polyester, Glass fibre reinforced |
| Silicone-free | No |
| Multiple conductor connection | 2 x 16 mm² |
| Finely stranded connection cross-section | 1 x 16 mm² … 1 x 50 mm² |
| Connection cross-section AWG finely stranded | 1 x AWG 6 … 1 x AWG 1/0 |
| Width | 180 mm |
| Width in inches | 7.09 in |
| Height | 212 mm |
| Height, inches | 8.36 in |
| Length | 413 mm |
| Length, inches | 16.27 in |
| Impact strength (IEC 60079) | 7 J |
| Impact strength (IEC 62262) | IK10 |
| Colour code | Black |
| Coding (clock hour position) | 7 |
| Lockable in | in 0- and I-position |
| Series | SolConeX |
| Detailed number of poles | 3 P + PE |
| Weight | 7.8 kg |
| Weight | 17.2 lb |
| Mounting / Installation | |
| Connection | Screw terminal |
| Components | |
| Cable entry note | Entry 1: Lower left Entry 2: Lower right |
| Entry 1 model | 8161/7-M50-3516-LT |
| Components | |
| Entry 1 type | Polyamide cable gland |
| Entry 1 | M50 x 1.5 |
| Entry 1 terminal area | 16 – 35 mm |
| Entry 1 clamping range, inch | 0.63 – 1.38 in |
| Metal entry possible 1 | No |
| Entry 2 model | 8290/3-M25 |
| Entry 2 type | Polyamide stopping plug |
| Entry 2 | M25 x 1.5 |
| Metal entry possible 2 | No |
Technical Drawings – Subject to Alterations

Position of clock hour position
Example: 6 h position
Dimensional Drawings (All Dimensions in mm [inches]) – Subject to Alterations

Wall-mounting socket
Accessories
| 2 NC contacts (8080/1-3) | 168356 |
| 250 V AC/DC | ||
| max. 6 A | ||
| 1.5….. 2.5 mm² solid / finely stranded | ||
| The switching function of the auxiliary contact depends on the installation slot used. | ||
| Left and right: synchronising | ||
| 1 NC contact + 1 NO contact (8080/1-1) | 168351 | |
| 250 V AC/DC | ||
| max. 6 A | ||
| 1.5….. 2.5 mm² solid / finely stranded | ||
| The switching function of the auxiliary contact depends on the installation slot used. | ||
| Left: delayed (ON), leading (OFF) | ||
| Right: synchronising | ||
| 2 NO contacts (8080/1-4) | 168353 | |
| 250 V AC/DC | ||
| max. 6 A | ||
| 1.5….. 2.5 mm² solid / finely stranded | ||
| The switching function of the auxiliary contact depends on the installation slot used. | ||
| Left and right: synchronising |
Auxiliary contact key
![]() | for removing the mounted auxiliary contact | 201909 |
Cable gland made of plastic
![]() | 8161/7-M25-1707, Ex e Plastic, M25 x 1.5, cable outer diameter 7 to 17 mm Lot size 50 pieces | 239157 |
| 8161/7-M50-3516, Ex e Plastic, M50 x 1.5, cable outer diameter 16 to 35 mm Batch size 4 pieces | 239160 |
Ex i cover
![]() | Ex i cover for auxiliary contacts for use in Ex i circuits | 168855 |
Stopping plug
![]() | 8290/3-M25 Plastic, M25 x 1.5 Lot size 1 piece | 143524 |
Switch insert
![]() | 8544/1-31L | 167239 |
Spare Parts
| Repair kit for sockets | 63 A Series 8579 | Art. No. |
![]() | Repair kit 8579 hinged cover, black | 275509 |
We reserve the right to make alterations to the technical data, dimensions, weights, designs and products available without notice. The illustrations cannot be considered binding.
R. STAHL Schaltgeräte GmbH | Am Bahnhof 30 | 74638 WALDENBURG
Tel. +49 7942 943 1700 | +49 7942 943 1777 | Email: [email protected] | r-stahl.com

























