Snap-action switches, S840
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Connect - Contact - Control Snap-action switches S840, S845, S846 Series Single-break changeover, NC or NO contacts, positive opening operation and wiping action Catalogue D40.en more information here: schaltbau-gmbh.com

Snap-action switches, S840, S845, S846 Series Single-break SPDT with positive opening operation and self-cleaning contacts S840 Series snap-action switches feature VDE-approved positive opening operation, which guarantees a reliable opening of the NC contact even when welded due to a short-circuit or overload currents . Self-cleaning, wiping contacts ensure high reliability even at low electric loads. The snap mechanism allows for fast and precise switching at a speed essentially independent of actuator speed. S845 and S846 Series switches are SPST versions with NC and NO contacts...

 Terminals SPDT SPST-NC SPST-NO Captive screws Flat tabs Solder lugs   Contact material Silver * Gold 10 Push button (standard) Roller lever Roller lever, short Plain lever, short Plain lever, long Simulated roller lever Note: This catalogue shows only stock items. For some variants minimum quantities apply. Please ask for the conditions. Special variant:  If you need a special variant of the switch, please do not hesitate to contact us. Maybe the type of switch you are looking for is among our many special designs. If not, we can also supply customized designs. In this case minimum...

Series S840/S845/S846 Series Contact configuration Single-break Form C (SPDT) switch with 3 terminals Single-break Form B (SPST-NC) switch with 2 terminals Single-break Form A (SPST-NO) switch with 2 terminals Contact force, typical Contact resistance, typical, without leads connected Positive opening force *2 Actuator travel for positive opening Maximum actuator travel *2 Actuation speed Vibration resistance *3 10 … 500 Hz all directions at 0.1 ms max. opening time Shock resistance *3 at 0.1 ms max. opening time Degree of protection   Contacts  Terminals Mechanical endurance Temperature...

Dimension and circuit diagram ●● Dimension diagram S840 b20 / S845 b20 / S846 b20  SPDT / SPST-NC / SPST-NO Circuit diagram Note * S845:  No terminal ** S846:  No terminal Actuator options, actuator positions SPDT SPST-NC SPST-NO Push button (standard) Contact finish: gold (silver without index) Flat tabs ●● S840  b  xx/xx Push button (standard)   20.2 Actuator position Push button (standard)  b Actuator travel in mm Free position Operating position Release position Total positive opening travel 2 --- S840 r --- Rollenhebel 3 --- S840 To ensure the proper working of the positive opening...

Actuator options, actuator positions (continued) ●● S840  n  xx/xx  Simulated roller lever 6 --- S840 n --- Nockenhebel Actuator positions Simulated roller lever  n Actuator travel in mm Operating position Release position Total positive opening travel Total travel position Note:  To ensure the proper working of the positive opening operation it is necessary to depress the plunger to the point of total positive opening travel. However, it must not be pushed beyond total travel position. Data is valid for new switches. Movement differential (between operating and release position) ●● Single...

Use of roller levers Ganging (side mount) ●● through the two transversal holes in the body of the switch by means of a collar screw or threaded bolt . Tightening torque 0.7 Nm max. ●● Alternatively, DUO-clips or retaining rings can be used. Switch with roller lever actuated by cam disc Switch with roller lever actuated by linear cam Specifications are subject to alteration without prior notice / Dimensions in mm When to use a roller lever? ≥40 ° ° ≥40 ●● Snap-action switches are designed for actuation with and without a roller lever. ●● A roller lever is required if the direction of...

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