Snap-action switches, S880 series
The world‘s smallest snap-action switch with self-cleaning contacts and positive opening operation
Schaltbau subminiature S880 snap-action switches feature self-cleaning contacts and a positive opening function.
Minimum size in combination with maximum reliability make the V4 snap-action switch ideally suited for a host of applications: as a safety limit switch in medical engineering, as a limit switch for machine, door and system control or in driver‘s desks of locomotives.
Risks resulting from contact welding or spring failure are reduced by the positive opening operation of the switch. Thanks to its snap mechanism it is highly resistant to shock and vibration.
Self-cleaning contacts (silver) and IP60/IP67 protection against dust,
humidity and pollutants all contribute to the high reliability of the switch, even at low currents.
The switch is operated by a standard push button, but plain levers, roller levers and simulated roller levers are also available as auxiliary actuators.
Features
- Precision switch: High switching accuracy and high resistance to shock and vibration.
- Miniature design: V4 subminiature switch, dimensions to DIN 41636, type B.
- Self-cleaning contacts: Constantly low contact resistance ensures high contact reliability over the entire design life of the switch.
- Positive opening operation: Forced opening of contacts even by contact welding, in compliance with IEC 60947-5-1, Annex K
- Sealed to: IP40, IP60 or IP67 in accordance with IEC 60529
- Contact finish: Silver or gold
Applications
- Safety limit switch in medical engineering
- Limit switch for machine and system control, product engineering, elevator technology and material handling
- Safety limit switch in access locking systems, door and barrier control
- Control switch in heating, ventilating, and air-conditioning systems
- Switches for driver‘s cab of rail vehicles, control panels in cranes and on the bridges of ships.
Specifications
Electrical Data | |
| Contact configuration | SPDT (Form C): Single gap changeover contact element with 3 terminals, wiping action and positive opening operation |
| 6 A at T = 85°C | |
| 6 A at T = 85°C | |
| 250 V at PD2 / 125 V at PD3 (value for IP40/00) | |
| 300 V | |
| Pollution degree EN60947 | PD 2 or PD 3 |
| Pollution degree UL508 | PD 3 |
| 2.5 kV | |
| Utilization category EN60947 | AC-15, 230 VAC/1.0 A / DC-13, 60 VDC/0.5 A |
| Utilization category UL508 | 240 V AC/1.0 A / DC 60 VDC/0.5 A (General Purpose) |
| IP40/IP00, IP60/00, IP67/67, IP67/00 | |
| Contact material | Silver or gold |
| Short-circuit protection | 2 A gG |
| Actuators, operating positions | |
| Actuator | Push button, roller lever, plain lever, simulated roller lever |
| Free position | 9.10 ±0.15 |
| Operating position | 8.40 ±0.20 |
| Release position | 8.55 ±0.20 |
| Total positive opening travel | 7.35 |
| Total travel position | 7.15 min. |
| Movement differential (between operating and release position) | 0.15 (typical) |
| Mechanical data | |
| Front mount | --- |
| Ganging (side mount) | yes, side mount |
| Vibration resistance | 50 g (10 … 500 Hz all directions, without aux. actuator at 0.1 ms max. opening time) |
| Shock resistance | 50 g, half sinus (without aux. actuator at 0.1 ms ) |
| Housing material | PC, green transparent / PC, black |
| Mechanical endurance | 1.5 million cycles min. |
| Temperature range | -40 °C ... +85 °C |
Note | Data valid for new switches with silver contacts |