Snap-action switch S847 with pushbutton and screw connections
Schaltbau Snap-action switch S847
S847 Snap-action switch - Robust microswitch for medium and low power ranges, changeover contact with self-cleaning double contacts, galvanic isolation and positive opening, protection class up to IP67
S847 W1A2 a
S847 W1A2 e
Snap-action switch S847 with roller lever and screw connections
S847 W5A2 a
Snap-action switch S847 with pushbutton and screw connections. IP67 in the contact area.
S847 W5A2 b
Snap-action switch S847 with pushbutton and screw connections. IP67 in the contact area.
S847 W3B2 e
Snap-action switch S847 with roller lever and strand connection. IP67 in the contact and connection area.
We supply the S847 series of snap-action switches in dust and water-proof designs up to IP67. Like the S826, this microswitch can be used in a wide variety of ways. Thanks to its robust structure, the S847 can even connect higher power ranges. The mechanical positive opening ensures the functioning of the break contacts, even if these were to be fused in a short circuit.
The two contact bridges of the S847 are galvanically isolated. In every switch operation, they rub in a defined fashion on the V-shaped fixed contacts and ensure a high level of contact reliability. The S847 therefore also connects low voltages and currents safely and reliably. For use in aggressive environments with low switching frequencies, we recommend gold contacts.
The S847 is suitable for safety applications in rough environments, as a position switch or end position switch, for example.
Features
Changeover contact with two galvanically isolated contact bridges.
Microswitches with two galvanically isolated contact bridges which are both attached in the plunger and are guided by it. When the snap-action switch is actuated, the bottom bridge opens the bottom contact pair (connections 1 and 2) and the top bridge closes the top contact pair (connections 3 and 4).
Continuous thermal current up to 10 A; disconnecting medium power ranges
A contact bridge spreads the breaking capacity over two contact points. The contact material is silver. For the switching of high direct currents, we recommend blow magnets for preventing electric arcs (optional).
Break contacts with positive opening
If the break contacts fuse in the event of a short circuit, the catch spring can no longer open. It is nevertheless opened reliably via the lever of the positive opening. This is a positive opening as outlined in DIN EN 60947-5-1, annex K.
Self-cleaning double contacts
In every switching process, the contact bridges rub in a defined fashion on the V-shaped fixed contacts and remove corrosion and combustion residue. Permanently low contact resistances ensure a high level of contact reliability throughout the service life.
Reliable switching of low currents
With self-cleaning silver contacts, small currents can be connected reliably and frequently. In chemically aggressive environments and with low switching frequencies, we recommend gold contacts.
Shock resistance 30 g, vibration resistance 30 g
The switch mechanism of this microswitch has been designed to be especially robust. Catch springs and return springs are designed so that the switching process works reliably even in the event of shocks and vibrations.
Protection class up to IP67 (contact area and connections)
Contact area IP40 Connections IP00 // Screws M3, flat screw 6.3 × 0.8
Contact area IP60 Connections IP00 // Screws M3, flat screw 6.3 × 0.8
Contact area IP67 Connections IP00 // Screws M3, flat screw 6.3 × 0.8
Contact area IP67 Connections IP67 // Stranded wire, lateral, length 500 mm
Dimensions 50 x 36 x 12 mm (L x H x W)
This is the maximum dimensions of the housing. The dimensions of the actuator and of the connections must be added. For all dimensions and drawings please refer to the following product catalogue:
Specifications
Electrical Data
| Contact configuration | SPDT-DB (Form Zb) snap-action switch with double-break contacts, 4 terminals, positive opening operation, wiping action, and 2 galvanically isolated contact bridges |
| 10 A at T = 85°C | |
| 10 A at T = 85°C | |
| 400 V | |
| 300 V | |
| Pollution degree IEC 60947 | PD 3 |
| Pollution degree UL508 | PD 3 |
| 4 kV | |
| Utilization category IEC 60947 | AC-15, 230 VAC/1.5 A / DC-13, 110 VDC/1.0 A |
| Utilization category UL508 | 240 V AC/1.5 A / DC 120 VDC/1.0 A (General Purpose) |
| IP40/IP00, IP60/00, IP67/00 | |
| Contact material | Silver or gold-plated silver |
| Short-circuit protection | 10 A gL |
Actuators, operating positions
| Actuator | Push button, roller lever |
| Free position | 8.85 ±0.15 (push button) |
| Operating position | 6.60 ±0.25 (push button) |
| Release position | 8.00 ±0.25 (push button) |
| Total positive opening travel | 4.20 (push button) |
| Total travel position | < 3.90 (push button) |
| Movement differential (between operating and release position) | 1.4 (typical, push button) |
Mechanical data
| Front mount | yes, front mounting by nut retainers M3 |
| Ganging (side mount) | yes, side mount |
| Vibration resistance | 30 g max. (10 … 500 Hz all directions, without aux. actuator at 0.1 ms max. opening time) |
| Shock resistance | 50 g max., half sinus (without aux. actuator at 0.1 ms max. opening time) |
| Housing material | PC, green transparent |
| Mechanical endurance | 10 million cycles min. |
| Temperature range | -40 °C … +85 °C |
| Note | Data valid for new switches with silver contacts |
Related Downloads
Catalogue D47 – Snap-action switches S847, S947
Changeover switches featuring wiping, galvanically isolated, double-break contacts and positive opening operation
Safety instructions snap-action switches
Snap-action switches S800 / S804 / S814 / S818 / S819 / S820 / S826 / S834 / S840 / S845 / S846 / S847 / S850 / S870 / S880 / S926 / S947 / S970
Safety instructions snap-action switches / Supplementary details
Snap-action switches S800 / S804 / S814 / S818 / S819 / S820 / S826 / S834 / S840 / S845 / S846 / S847 / S850 / S870 / S880 / S926 / S947 / S970
Manual SE-M
Snap-action switches S800 / S804 / S814 / S818 / S819 / S820 / S826 / S840 / S845 / S846 / S847 / S850 / S870 / S880 / S926 / S947 / S970 — Installation and Maintenance Instructions
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