Snap-action switch S826 – Diverse microswitch for medium and low power ranges
Changeover contact with self-cleaning mechanism, galvanic isolation and positive opening
The snap-action switch S826 is a diverse microswitch for medium and low power ranges. As a changeover contact, it can open one circuit and close a second with one actuation. The mechanical positive opening ensures reliable opening. The two contact bridges 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. This snap-action switch is therefore particularly suited to the switching of low currents and voltages in safety applications, primarily as a position switch or as an end position switch. For use in aggressive environments with low switching frequencies, we recommend gold contacts.
Features
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).
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.
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.
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.
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-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 (except «screw with saddle clamp»: 250 V: PD3 / 400 V: PD2) | |
| 300 V | |
| Pollution degree IEC 60947 | PD 3 |
| Pollution degree UL508 | PD 3 |
| 4 kV | |
| Utilization category IEC 60947 | AC-15, 230 VAC/1.0 A / DC-13, 110 VDC/0.5 A |
| Utilization category UL508 | AC 240 V / 1 A general purpose |
| IP40/IP00 | |
| Contact material | Silver or gold |
| Short-circuit protection | 6 A gR (silver only) |
| Actuator | Push button, roller lever |
| Free position | 8.85 ±0.20 (push button) |
| Operating position | 6.60 ±0.35 (push button) |
| Release position | 7.80 ±0.35 (push button) |
| Total positive opening travel | 5.85 (push button) |
| Total travel position | < 5.65 (push button) |
| Movement differential (between operating and release position) | 1.2 (typical, push button) |
| Front mount | yes, front mounting by nut retainers M3 |
| Ganging (side mount) | yes, side mount |
| Vibration resistance | 10 g (10 … 500 Hz all directions, without aux. actuator at 0.1 ms max. opening time) |
| Shock resistance | 30 g, 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 switches with silver contacts. Data valid for new switches under laboratory conditions and at room temperature, unless otherwise mentioned. |
