Snap-action switch S970 – Compact microswitch for safety applications in aggressive environments
Changeover contact with self-cleaning contacts and positive opening. Resistant PEI housing against extreme temperatures and aggressive chemicals.
The S970 snap-action switch is identical in design to the S870, but has a polyetherimide (PEI) housing. This microswitch can therefore be used in a temperature range from –55° to +150° Celsius. It is resistant to aggressive chemicals and sealed against powder dust. The housing of the S970 is fifty per cent more shock-resistant than the polycarbonate housing of the S870.
Features
The standard design is a changeover contact with three connections. The switch is also available as break contact or make contact (with two connections).
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.
The moving contact rubs against the fixed contact during every actuation. This removes corrosion and combustion residue and reduces contact resistance.
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.
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
Housing material: PEI, amber-transparent / PEI, black
Temperature range: –55°C to +150°C max.; depending on the design
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:
By selecting this option you finish the configuration.
Specifications
| Contact configuration | SPDT (Form C) snap-action switch with 3 terminals, positive opening operation, and wiping action |
| 10 A at T = 85°C | |
| 10 A at T = 85°C | |
| 250 V | |
| 240 V | |
| Pollution degree IEC 60947 | PD 3 |
| Pollution degree UL508 | PD 2 |
| 4 kV | |
| Utilization category IEC 60947 | AC-15, 230 VAC/1.5 A / DC-13, 60 VDC/0.5 A |
| Utilization category UL508 | 240 V AC/1.5 A / DC 60 VDC/0.5 A (General Purpose) |
| IP40/IP00, IP40/IP20, IP60/00, IP67/00 | |
| Contact material | Silver or gold |
| Short-circuit protection | 10 A gG |
| Actuator | Push button, roller lever, plain lever, simulated roller lever |
| Free position | 16.0 ±0.1 (push button) |
| Operating position | 14.8 ±0.2 (push button) |
| Release position | 15.1 ±0.2 (push button) |
| Total positive opening travel | 13.3 (push button) |
| Total travel position | < 13.0 (push button) |
| Movement differential (between operating and release position) | 0.3 (typical, push button) |
| Front mount | --- |
| Ganging (side mount) | yes, side mount |
| Actuation speed | max. 1.0 m/s, min. 0.1 mm/s |
| Vibration resistance | 50 g (10 … 500 Hz all directions, without aux. actuator at 0.1 ms max. opening time) |
| Shock resistance | 70 g, half sinus (without aux. actuator at 0.1 ms max. opening time) |
| Housing material | PEI, amber transparent / PEI, black |
| Mechanical endurance | 10 million cycles min., dependent on version |
| Temperature range | -55 °C ... +150 °C max., dependent on version |
| Note | Data valid for switches with silver contacts. Data valid for new switches under laboratory conditions and at room temperature, unless otherwise mentioned. |
